You searched for subject:(East Pacific Green Turtle).
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1.
McKenna, Lindsay N.
Vocalizations of Sea Turtle Hatchlings and Embryos.
Degree: 2016, IPFW
URL: http://opus.ipfw.edu/masters_theses/50 
► Many animals vocalize to communicate. While this vocal communication has been studied extensively in mammals and birds, far less attention has been paid to…
(more)
▼ Many animals vocalize to communicate. While this vocal communication has been studied extensively in mammals and birds, far less attention has been paid to reptile vocalizations. Sea turtles vocalize in the nest, but the purpose of these vocalizations is unknown. I aimed to characterize the vocalizations of the olive ridley turtles (Lepidochelys olivacea) in the nest during incubation, hatching, and emerging. I also aimed to characterize and compare the vocalizations of olive ridley, leatherback (Dermochelys coriacea), and East Pacific green (Chelonia mydas agassizii) turtle hatchlings. I relocated three olive ridley nests at Parque Nacional Marino Las Baulas, Costa Rica, and buried them next to a plexiglass window, which was used to obtain video recordings using a Canon digital camera. A hollow tube leading from above the eggs to the sand’s surface was used to insert an Earthworks M30 microphone that was attached to a Marantz PMD61 MKII recorder to record audio. Each recording was categorized as incubation, hatching, or emerging. 60 minutes of each stage was analyzed using Raven Pro sound analysis software. The type (harmonic, non-harmonic, pulse) and characteristics (highest frequency, dominant frequency, lowest frequency, duration, and frequency range) were documented. In addition, I recorded olive ridley, leatherback, and East Pacific green hatchlings in buckets. The same characteristics of vocalizations were documented from the bucket recordings as the nest recordings. For statistical purposes, the Chi-Squared Test, Friedman Test, and Kruskal-Wallis tests were used. I recorded a total of 157 vocalizations from the nests. The frequency of the vocalizations ranged from 0.05 - 11.4 kilohertz and the duration ranged from 0.01 - 0.54 seconds. I found significantly more vocalizations in the incubation stage than the other two stages (p < 0.05). The pulse vocalizations were only found in the incubation stage. Also, there was no significant difference seen in types or characteristics of vocalizations among the stages (p > 0.05, all cases). The bucket recordings revealed that the frequencies were not significantly different, but the duration of the leatherback hatchling vocalizations were significantly longer than the other two species (p < 0.05). The other characteristics of the vocalizations between species were not different. The olive ridleys hatchlings in the bucket vocalized more often than the hatchlings in the nest (p < 0.05). The frequencies in the bucket were within the same range as the frequencies in the nest, which was also seen when comparing the leatherbacks in the bucket to Ferrara et al. (2014). The results suggest that the number of vocalizations or the pulse vocalizations could possibly be used in synchronizing hatching. The significance of the frequencies of the vocalizations in the nest is unable to be determined from this study. The similar frequencies of vocalizations among the three species suggest that all sea turtle species vocalize within the same frequency range…
Subjects/Keywords: sea turtle vocalizations; sea turtle hatchlings; reptile vocalizations; turtle communication; olive ridley turtle; leatherback turtle; East Pacific green turtle; Animal Sciences; Behavior and Ethology; Ecology and Evolutionary Biology; Life Sciences; Marine Biology
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APA (6th Edition):
McKenna, L. N. (2016). Vocalizations of Sea Turtle Hatchlings and Embryos. (Masters Thesis). IPFW. Retrieved from http://opus.ipfw.edu/masters_theses/50
Chicago Manual of Style (16th Edition):
McKenna, Lindsay N. “Vocalizations of Sea Turtle Hatchlings and Embryos.” 2016. Masters Thesis, IPFW. Accessed January 27, 2021.
http://opus.ipfw.edu/masters_theses/50.
MLA Handbook (7th Edition):
McKenna, Lindsay N. “Vocalizations of Sea Turtle Hatchlings and Embryos.” 2016. Web. 27 Jan 2021.
Vancouver:
McKenna LN. Vocalizations of Sea Turtle Hatchlings and Embryos. [Internet] [Masters thesis]. IPFW; 2016. [cited 2021 Jan 27].
Available from: http://opus.ipfw.edu/masters_theses/50.
Council of Science Editors:
McKenna LN. Vocalizations of Sea Turtle Hatchlings and Embryos. [Masters Thesis]. IPFW; 2016. Available from: http://opus.ipfw.edu/masters_theses/50
2.
Duncan, Roxanne.
Development of a Species Distribution Model for the East Pacific Green Sea Turtle using Ecological Geoprocessing Tools.
Degree: MS, Oceanography, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11881
► East Pacific green sea turtles, Chelonia mydas, play ecologically important roles in marine habitats which range from grazing (and thus regularly "mowing") algae and seagrass…
(more)
▼ East Pacific green sea turtles, Chelonia mydas, play ecologically important roles in marine habitats which range from grazing (and thus regularly "mowing") algae and seagrass beds to cycling nutrients between the ocean and land. However, these important grazers have been hunted to ecological extinction in some places for their eggs, meat, and skin. The conservation initiative for the survival of sea turtles requires the protection of their primary habitats in conjunction with a decrease in their interaction with humans. One way these objectives can be met is through the creation of species distribution maps (SDMs). For this thesis, a SDM was created from a generalized additive model used to identify major feeding areas for
East Pacific green turtles residing in the Galapagos Islands. The input for the model was
green turtle sighting locations during a June 2010 marine life observation survey and remotely sensed values of four oceanographic parameters obtained from satellite sensors (Bathymetry, Sea Surface Temperature, Chlorophyll a, and Current Speed). Line transects of intertidal and subtidal shoreline regions of the islands of Isabela, San Cristobal, and Floreana were also completed, to describe similarities and differences in macroalgal abundance between the locations.
A generalized additive model (GAM) explained 56% of the data's null deviance and had a true positive rate of 0.83. The corresponding species distribution map indicated that
East Pacific green sea turtles prefer to forage in warm, low chlorophyll a, slow moving waters at depths mostly less than 250m throughout the archipelago. ANOVA analyses showed that macroalgal abundance was statistically different (p-value < 0.01) between the islands of San Cristobal and Isabela. The line transects analysis also documented that red algae was the most prominent phyla at the sites and that the macroalgal abundance did not vary much between months June 2010 and April/May 2011. With these results, potential foraging areas for
East Pacific green turtles can be identified and protected. Future studies will be focused on the collection of macroalgae from coastal areas outlined in the SDM and the interactions between
green turtles and their competitors and/or predators. This information can be used to validate the areas delineated by the model and to further the understanding of the spatial-temporal effects on macroalgal abundance.
Advisors/Committee Members: Biggs, Douglas (advisor), DiMarco, Steven (committee member), Filippi, Anthony (committee member).
Subjects/Keywords: East Pacific Green Turtle; MGET; Galapagos Islands
…38
CHAPTER III SPECIES DISTRIBUTION MODEL OF THE EAST PACIFIC
GREEN SEA TURTLE IN THE… …nesting site for the
East Pacific green sea turtle. At this major nesting site, gravid females… …coriacea), olive ridleys
(Lepidochelys olivacea) and the East Pacific green turtle… …73
xii
LIST OF FIGURES
Page
Fig. 1. Images of East Pacific green turtles caught in… …55
Fig. 17. The presence probability map for east pacific green sea turtles residing in the…
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APA (6th Edition):
Duncan, R. (2012). Development of a Species Distribution Model for the East Pacific Green Sea Turtle using Ecological Geoprocessing Tools. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11881
Chicago Manual of Style (16th Edition):
Duncan, Roxanne. “Development of a Species Distribution Model for the East Pacific Green Sea Turtle using Ecological Geoprocessing Tools.” 2012. Masters Thesis, Texas A&M University. Accessed January 27, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11881.
MLA Handbook (7th Edition):
Duncan, Roxanne. “Development of a Species Distribution Model for the East Pacific Green Sea Turtle using Ecological Geoprocessing Tools.” 2012. Web. 27 Jan 2021.
Vancouver:
Duncan R. Development of a Species Distribution Model for the East Pacific Green Sea Turtle using Ecological Geoprocessing Tools. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11881.
Council of Science Editors:
Duncan R. Development of a Species Distribution Model for the East Pacific Green Sea Turtle using Ecological Geoprocessing Tools. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11881
Florida Atlantic University
3.
Celano, Lisa.
Seafinding by the green turtle, Chelonia mydas: the orientation response is tuned to the lighting environment at the nesting beach.
Degree: MS, 2018, Florida Atlantic University
URL: http://fau.digital.flvc.org/islandora/object/fau:40786
► Hatchling marine turtles use visual cues to orient from their nest to the sea at night. However, the wavelengths of light that carry this information…
(more)
▼ Hatchling marine turtles use visual cues to orient from their nest to the sea at
night. However, the wavelengths of light that carry this information have not been
properly documented, nor do we understand why they are favored. I measured
wavelength irradiance at 20 nm intervals between 340 – 600 nm at a dark nesting beach
and then, in the laboratory, determined the thresholds of the hatchlings for each λ that
evoked a positive phototaxis. In this study, I show that green turtle hatchlings are (i) most
sensitive to the shorter (360 – 480 nm) light wavelengths. Those light energies (ii)
dominated the available natural lighting at the nesting beach. They also (iii) presented a
steep gradient in irradiance between a landward and seaward view, an important cue for
orientation. I attribute the phototactic responses to “stimulus filtering”, the outcome of
natural selection that optimizes behavioral responses (seafinding) according to their
function, as well as when and where they occur.
2018
Degree granted: Thesis (M.S.) – Florida Atlantic University, 2018.
Collection: FAU
Advisors/Committee Members: Salmon, Michael (Thesis advisor), Florida Atlantic University (Degree grantor), Charles E. Schmidt College of Science, Department of Biological Sciences.
Subjects/Keywords: Green turtle; Chelonia mydas; Phototaxis
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APA (6th Edition):
Celano, L. (2018). Seafinding by the green turtle, Chelonia mydas: the orientation response is tuned to the lighting environment at the nesting beach. (Masters Thesis). Florida Atlantic University. Retrieved from http://fau.digital.flvc.org/islandora/object/fau:40786
Chicago Manual of Style (16th Edition):
Celano, Lisa. “Seafinding by the green turtle, Chelonia mydas: the orientation response is tuned to the lighting environment at the nesting beach.” 2018. Masters Thesis, Florida Atlantic University. Accessed January 27, 2021.
http://fau.digital.flvc.org/islandora/object/fau:40786.
MLA Handbook (7th Edition):
Celano, Lisa. “Seafinding by the green turtle, Chelonia mydas: the orientation response is tuned to the lighting environment at the nesting beach.” 2018. Web. 27 Jan 2021.
Vancouver:
Celano L. Seafinding by the green turtle, Chelonia mydas: the orientation response is tuned to the lighting environment at the nesting beach. [Internet] [Masters thesis]. Florida Atlantic University; 2018. [cited 2021 Jan 27].
Available from: http://fau.digital.flvc.org/islandora/object/fau:40786.
Council of Science Editors:
Celano L. Seafinding by the green turtle, Chelonia mydas: the orientation response is tuned to the lighting environment at the nesting beach. [Masters Thesis]. Florida Atlantic University; 2018. Available from: http://fau.digital.flvc.org/islandora/object/fau:40786
University of Arizona
4.
Owens, David Wm. (David William), 1946-.
ENDOCRINE CONTROL OF REPRODUCTION AND GROWTH IN THE GREEN SEA TURTLE CHELONIA MYDAS
.
Degree: 1976, University of Arizona
URL: http://hdl.handle.net/10150/289419
Subjects/Keywords: Green turtle.
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APA (6th Edition):
Owens, David Wm. (David William), 1. (1976). ENDOCRINE CONTROL OF REPRODUCTION AND GROWTH IN THE GREEN SEA TURTLE CHELONIA MYDAS
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/289419
Chicago Manual of Style (16th Edition):
Owens, David Wm. (David William), 1946-. “ENDOCRINE CONTROL OF REPRODUCTION AND GROWTH IN THE GREEN SEA TURTLE CHELONIA MYDAS
.” 1976. Doctoral Dissertation, University of Arizona. Accessed January 27, 2021.
http://hdl.handle.net/10150/289419.
MLA Handbook (7th Edition):
Owens, David Wm. (David William), 1946-. “ENDOCRINE CONTROL OF REPRODUCTION AND GROWTH IN THE GREEN SEA TURTLE CHELONIA MYDAS
.” 1976. Web. 27 Jan 2021.
Vancouver:
Owens, David Wm. (David William) 1. ENDOCRINE CONTROL OF REPRODUCTION AND GROWTH IN THE GREEN SEA TURTLE CHELONIA MYDAS
. [Internet] [Doctoral dissertation]. University of Arizona; 1976. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10150/289419.
Council of Science Editors:
Owens, David Wm. (David William) 1. ENDOCRINE CONTROL OF REPRODUCTION AND GROWTH IN THE GREEN SEA TURTLE CHELONIA MYDAS
. [Doctoral Dissertation]. University of Arizona; 1976. Available from: http://hdl.handle.net/10150/289419
5.
Clyde-Brockway, Chelsea E.
Inter-Nesting and Post-Nesting Movements and Behavior of East Pacific Green Turtles (Chelonia mydas agassizii) from Playa Cabuyal, Guanacaste, Costa Rica.
Degree: 2014, IPFW
URL: http://opus.ipfw.edu/masters_theses/35
► The East Pacific green turtle (Chelonia mydas agasizzi) is a sub-population of the widely distributed green turtle (Chelonia mydas). Like all sea turtles, East…
(more)
▼ The East Pacific green turtle (Chelonia mydas agasizzi) is a sub-population of the widely distributed green turtle (Chelonia mydas). Like all sea turtles, East Pacific green turtles have a type III survivorship curve, which is characterized by long-lived adults that have a low mortality rate and high reproductive output with a low hatchling survival rate. For this to be successful, the adults must live through multiple reproductive seasons, and in the Eastern Pacific, there is high mortality on adult East Pacific green sea turtles. The continued success of this distinct population relies on protection during key in water movements: the nesting season and migrations from foraging grounds to nesting beaches and back. Management techniques need to be developed on a site-specific basis so it is crucial to understand the specific habitat needs for each nesting population as defined by the local oceanography. I used satellite telemetry to map movements of Pacific green turtles nesting on Playa Cabuyal, Costa Rica to understand the temporal and physical distribution of turtles both two and three dimensionally during the inter-nesting period and post-nesting migrations to foraging grounds.
I deployed ten satellite transmitters across two nesting seasons, 2012-2014, six SPOT5 transmitters and four MK10 transmitters. The sample size for this study included 11 inter-nesting turtles and four post-nesting migrations (two post-nesting turtles were also tracked during their nesting season), curved carapace length ranged from 82.2 to 91.6 cm (mean ± SD = 85±2.84 cm) while curved carapace width ranged from 76 to 90 cm (mean ± SD = 79.5±3.80 cm). The observed inter-nesting period was between 7 and 17 days (mean ± SD, 13.1±2.5 days), which is comparable to the mean of 15.4 days observed as an average inter-nesting interval for turtles nesting on this beach. Post-nesting turtles moved over a period of 19 to 189 days (107.25±90.77 days) with one resident of the Gulf of Papagayo and three that migrated an average of 500 km away from the nesting beach.
During the inter-nesting period turtles spread out across the Gulf of Papagayo and, in some cases, migrated out of the gulf and along the coast before returning to nest. The minimum convex polygon (MCP) with percent area use contours indicates that the highest use areas were close to the beach (within 10 km) and a couple isolated areas off the coast in the southern part of the gulf. Overall, this high use inter-nesting area totals 27 km2 and represents the high density twenty-five percent (75% of all positions received) of recorded location data during their movements between nests. Inter-nesting dive behavior indicated that, on average, fifty-five percent of the dives recorded were in the top 15 m of the water column, and sixty-six percent of inter-nesting dives lasted 30 minutes or less. Overall, ninety percent of the time inter-nesting turtles were within 15 m of the surface even though the ocean floor is generally 25 m or deeper throughout…
Subjects/Keywords: Costa Rica; migration; inter-nesting; East Pacific green turtle; Chelonia mydas agassizii; dive behavior; satellite telemetry; Behavior and Ethology; Biology; Ecology and Evolutionary Biology; Marine Biology; Population Biology
…10
4.
Scanning an East Pacific green turtle for developing follicles… …Paladino.
The East Pacific green turtle (Chelonia mydas agasizzi) is a sub-population… …Cabuyal (10°40’N, 85°40’W), an East Pacific
green turtle nesting beach on the Pacific… …Measurement of curved carapace width.
Figure 4: Scanning an East Pacific green turtle for… …Nesting and
Post-Nesting Movements and Behavior of East Pacific Green Turtles (Chelonia…
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APA (6th Edition):
Clyde-Brockway, C. E. (2014). Inter-Nesting and Post-Nesting Movements and Behavior of East Pacific Green Turtles (Chelonia mydas agassizii) from Playa Cabuyal, Guanacaste, Costa Rica. (Masters Thesis). IPFW. Retrieved from http://opus.ipfw.edu/masters_theses/35
Chicago Manual of Style (16th Edition):
Clyde-Brockway, Chelsea E. “Inter-Nesting and Post-Nesting Movements and Behavior of East Pacific Green Turtles (Chelonia mydas agassizii) from Playa Cabuyal, Guanacaste, Costa Rica.” 2014. Masters Thesis, IPFW. Accessed January 27, 2021.
http://opus.ipfw.edu/masters_theses/35.
MLA Handbook (7th Edition):
Clyde-Brockway, Chelsea E. “Inter-Nesting and Post-Nesting Movements and Behavior of East Pacific Green Turtles (Chelonia mydas agassizii) from Playa Cabuyal, Guanacaste, Costa Rica.” 2014. Web. 27 Jan 2021.
Vancouver:
Clyde-Brockway CE. Inter-Nesting and Post-Nesting Movements and Behavior of East Pacific Green Turtles (Chelonia mydas agassizii) from Playa Cabuyal, Guanacaste, Costa Rica. [Internet] [Masters thesis]. IPFW; 2014. [cited 2021 Jan 27].
Available from: http://opus.ipfw.edu/masters_theses/35.
Council of Science Editors:
Clyde-Brockway CE. Inter-Nesting and Post-Nesting Movements and Behavior of East Pacific Green Turtles (Chelonia mydas agassizii) from Playa Cabuyal, Guanacaste, Costa Rica. [Masters Thesis]. IPFW; 2014. Available from: http://opus.ipfw.edu/masters_theses/35
Nelson Mandela Metropolitan University
6.
Le Gouvello Du Timat, Diane Zelica Marie.
The effects of turtle-introduced nutrients on beach ecosystems.
Degree: Faculty of Science, 2016, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/6959
► Resource subsidies are flows of nutrients from one ecosystem to another. Sandy beach ecosystems are at the interface between land and sea and thus receive…
(more)
▼ Resource subsidies are flows of nutrients from one ecosystem to another. Sandy beach ecosystems are at the interface between land and sea and thus receive nutrients from both land/seascapes. The seasonal nesting of sea turtles introduces large inputs of eggs, and so nutrients, onto sandy beach ecosystems, but little is known about the effects of these spatially and temporally variable nutrient input pulses on the dynamics of consumers in the recipient system. In this study, I examined the ecological role of sea turtles as vectors of nutrients that introduce large amounts of nutrients (in the form of eggs) from distant foraging grounds into nutrient-poor beach ecosystems. Although some of the nutrients return to the sea in the form of hatchlings, nutrients from unhatched and depredated eggs, dead and predated hatchlings, as well as chorioallantoic fluid and egg shells remain on the beach and presumably enter sandy beach food webs. I hypothesized that turtle nutrients significantly increase the availability of nutrients to sandy beach ecosystems and that those nutrients are incorporated by both terrestrial and marine food webs. These hypotheses were tested by comparing isotopic signatures of 13C and 15N of consumers on beaches with high and low turtle nest densities. The response of meiofauna to the decomposition of turtle eggs was also investigated. I predicted that meiofaunal abundance is positively affected by turtle nutrients and that higher meiofaunal abundances will be obtained in decomposing, depredated nests. I tested this hypothesis by comparing meiofaunal abundance in naturally predated nests to densities away from turtle nests (as a control). An in situ experiment that mimics conditions of naturally predated sea turtle nest, was set up to test meiofaunal community responses to turtle nutrients over time. The study indicates that sea turtle eggs represent a short pulsed resource subsidy that increases the nutrient and energy budget of sandy beach ecosystems. The results show that of the five potential nutrient pathways tested, ghost crabs appear to consume egg nutrients in measurable quantities, altering their diet and feeding behaviour according to food availability. The study also showed that there was a strong, but short-lived positive response of meiofauna to the introduction of nutrients, with increased abundance of all taxa in predated nests and experimental treatments. This response was particularly strong for nematodes which peaked in abundance after seven days. I conclude that turtle-derived nutrients represent a pulsed resource subsidy that makes significant contribution to the energy budget of sandy beach/dune ecosystems.
Subjects/Keywords: Sea turtles; Sea turtles – Conservation; Green turtle
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APA (6th Edition):
Le Gouvello Du Timat, D. Z. M. (2016). The effects of turtle-introduced nutrients on beach ecosystems. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/6959
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Le Gouvello Du Timat, Diane Zelica Marie. “The effects of turtle-introduced nutrients on beach ecosystems.” 2016. Thesis, Nelson Mandela Metropolitan University. Accessed January 27, 2021.
http://hdl.handle.net/10948/6959.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Le Gouvello Du Timat, Diane Zelica Marie. “The effects of turtle-introduced nutrients on beach ecosystems.” 2016. Web. 27 Jan 2021.
Vancouver:
Le Gouvello Du Timat DZM. The effects of turtle-introduced nutrients on beach ecosystems. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2016. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10948/6959.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Le Gouvello Du Timat DZM. The effects of turtle-introduced nutrients on beach ecosystems. [Thesis]. Nelson Mandela Metropolitan University; 2016. Available from: http://hdl.handle.net/10948/6959
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
7.
Piacenza, Susan E. H.
Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations.
Degree: PhD, Fisheries Science, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59146
► Green sea turtles, Chelonia mydas, have endangered and threatened populations globally, but several populations show signs of population recovery. In Hawaii, nesting female green turtles…
(more)
▼ Green sea turtles, Chelonia mydas, have endangered and threatened populations globally, but several populations show signs of population recovery. In Hawaii, nesting female
green turtles have increased 5.7% year⁻¹ since 1973, but wide fluctuations in census counts of nesting females make recovery diagnosis difficult. For effective management planning, it is critical to have the best information possible on vital rates, and to determine the best tools and practices for incorporating vital rate information, particularly variability, into population models to assess population size and status. Process and observation errors, compounded by late maturity, obscure the relationship between trends on the nesting beach and the entire population. Using sea
turtle nesting beach surveys as a population index for assessment is problematic, yet often pragmatic because this is the only population index that is easily accessible. It is advantageous to use a modelling approach that estimates interannual variability in life history traits, accounts for uncertainty from individual-level variability, and allows for population dynamics to emerge from individual behaviors. To this end, I analyzed a long-term data set of marked
green sea turtles to determine the degree of temporal variability in key life history traits. From this analysis, I built an agent-based model (ABM) to form the basis of a new assessment tool – Monitoring Strategy Evaluation.
In Chapter 2, I evaluated annual changes in demographic indicators (DIs) of 3,677 nesting
green turtles from a 38-year tagging program in the Hawaiian Islands to determine if key life history traits are changing over time and in response to nester density. I used linear mixed models and multistate open robust design models to estimate several DIs and correlated them with nesting female counts. Mean nester carapace length and breeding probability were highly variable over time, suggesting shifts in age structure that could be due to recruitment. The top-ranked model predicted constant female survival over time. A significant positive relationship between the nesting population and breeding probability was evident, and breeding probability shows promise as an indicator of population recovery. This work contributes to a growing set of studies evaluating sea
turtle demography for temporal variability and is the first for Hawaiian
green turtles.
In Chapter 3, I develop the
Green Sea
Turtle Agent-Based Model (GSTABM) to evaluate how recovery processes differ across disturbance types. The GSTABM incorporates individually variable age-at-maturity, clutch frequency and clutch size, annually variable breeding probability, environmental stochasticity and density dependence in hatchling production. The GSTABM simulates the process of population impact and recovery and the monitoring process, with observation error, on the nesting beach. The GSTABM captures the emergent patterns of interannual nesting variation, nester recruitment, and realistic population growth rates. Changes in survival rates of the…
Advisors/Committee Members: Heppell, Selina S. (advisor), Richards, Paul M. (committee member).
Subjects/Keywords: Chelonia mydas; Green turtle – Monitoring – Hawaii
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APA ·
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APA (6th Edition):
Piacenza, S. E. H. (2016). Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/59146
Chicago Manual of Style (16th Edition):
Piacenza, Susan E H. “Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations.” 2016. Doctoral Dissertation, Oregon State University. Accessed January 27, 2021.
http://hdl.handle.net/1957/59146.
MLA Handbook (7th Edition):
Piacenza, Susan E H. “Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations.” 2016. Web. 27 Jan 2021.
Vancouver:
Piacenza SEH. Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations. [Internet] [Doctoral dissertation]. Oregon State University; 2016. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/1957/59146.
Council of Science Editors:
Piacenza SEH. Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations. [Doctoral Dissertation]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59146
University of Florida
8.
Johnson, Robert A.
Effects of Green Turtle Grazing on Carbon Dynamics and Infaunal Communities in Thalassia testudinum (the previous 2 words in italics) Seagrass Meadows.
Degree: PhD, Zoology - Biology, 2019, University of Florida
URL: https://ufdc.ufl.edu/UFE0054171
► Green turtles (Chelonia mydas) are marine megaherbivores that consume seagrass as a part of their diet across their global range. Their distinct foraging strategy, in…
(more)
▼ Green turtles (Chelonia mydas) are marine megaherbivores that consume seagrass as a part of their diet across their global range. Their distinct foraging strategy, in which they establish and maintain grazing patches in which all blades are cropped to a short height, structurally alters the seagrass meadows in which they graze. This can affect ecosystem processes and species relationships within these grazed areas with important implications for seagrass meadow functioning.
Advisors/Committee Members: Bjorndal,Karen Anne (committee chair), Lichstein,Jeremy W (committee member), Osborne,Todd Z (committee member), Frazer,Tom K (committee member).
Subjects/Keywords: carbon – caribbean – grazing – green-turtle – meadow – seagrass
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APA (6th Edition):
Johnson, R. A. (2019). Effects of Green Turtle Grazing on Carbon Dynamics and Infaunal Communities in Thalassia testudinum (the previous 2 words in italics) Seagrass Meadows. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0054171
Chicago Manual of Style (16th Edition):
Johnson, Robert A. “Effects of Green Turtle Grazing on Carbon Dynamics and Infaunal Communities in Thalassia testudinum (the previous 2 words in italics) Seagrass Meadows.” 2019. Doctoral Dissertation, University of Florida. Accessed January 27, 2021.
https://ufdc.ufl.edu/UFE0054171.
MLA Handbook (7th Edition):
Johnson, Robert A. “Effects of Green Turtle Grazing on Carbon Dynamics and Infaunal Communities in Thalassia testudinum (the previous 2 words in italics) Seagrass Meadows.” 2019. Web. 27 Jan 2021.
Vancouver:
Johnson RA. Effects of Green Turtle Grazing on Carbon Dynamics and Infaunal Communities in Thalassia testudinum (the previous 2 words in italics) Seagrass Meadows. [Internet] [Doctoral dissertation]. University of Florida; 2019. [cited 2021 Jan 27].
Available from: https://ufdc.ufl.edu/UFE0054171.
Council of Science Editors:
Johnson RA. Effects of Green Turtle Grazing on Carbon Dynamics and Infaunal Communities in Thalassia testudinum (the previous 2 words in italics) Seagrass Meadows. [Doctoral Dissertation]. University of Florida; 2019. Available from: https://ufdc.ufl.edu/UFE0054171
Massey University
9.
Godoy, Daniel A.
The ecology and conservation of green turtles (Chelonia mydas) in New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Marine Ecology at Massey University, Albany, New Zealand
.
Degree: 2016, Massey University
URL: http://hdl.handle.net/10179/12200
► Historically, little consideration has been given to the occurrence, ecology or conservation of the green turtle (Chelonia mydas) in temperate New Zealand. Located geographically at…
(more)
▼ Historically, little consideration has been given to the occurrence, ecology or
conservation of the green turtle (Chelonia mydas) in temperate New Zealand.
Located geographically at the southern boundary of the distributional range of
green turtles in the southwestern Pacific, reports of this species in New Zealand
are often overlooked as occasional visitors or stragglers incidentally carried by
ocean currents. This convention may be reasonable when considering the
temperature constrained distribution of this poikilothermic marine reptile. Despite
this, green turtles have been reported in New Zealand waters for more than 100
years, yet no study has undertaken any in depth investigation as to their
occurrence in this region. Therefore, this thesis investigated the presence of green
turtles in New Zealand waters to test the hypothesis that their occurrence is
ephemeral and incidental.
Opportunistic data and samples collected between 1895 and 2013 was collated,
reviewed and analysed to investigate several lines of empirical enquiry, including
spatio-temporal distribution, population structure, genetic origin, diet composition
and anthropogenic effects. Sighting, stranding, and incidental capture revealed a
year round presence of post-pelagic immature juveniles to large sub-adult green
turtles across northern New Zealand (ca. 34°-38° S). Such occurrence exists
despite sea surface temperatures averaging only 14 C during austral winters.
The aggregation exhibited a female:male sex ratio of 1.7:1 which is similar to that
reported from proximate warm temperate foraging grounds in eastern Australia.
Size frequency data indicated that green turtles recruit to neritic habitats of the
North Island at ca. 40.8 cm curved carapace length. This reflects a natural postoceanic
settlement pattern rather than oceanic-phase stragglers incidentally blown
ashore by storm and other stochastic events. Supporting this rationale for natural
recruitment, diet component data demonstrates that once green turtles settle into
New Zealand’s nearshore coastal habitats, they transition to a benthic foraging
strategy. Notably, green turtles in New Zealand do not ontogenetically transition
from omnivory to obligate herbivory with age, but instead consume a variable diet
of primarily macroalgae and benthic macro invertebrates. Overall, the confirmation
of feeding in New Zealand substantially extends the southern foraging limit for green turtles in the Pacific Ocean.
Genetic analyses of ~770 base pair sequences of mitochondrial (mt) DNA was conducted on 42 stranded green turtles to characterize the genetic structure of this aggregation. Results identified 15 haplotypes including one orphan haplotype from widely dispersed green turtle stocks across the western, central, and eastern Pacific Ocean. When compared to other regional nesting rookeries and foraging grounds, the New Zealand aggregation exemplified its unique composition, predominantly due to the large proportion of haplotypes from the endemic eastern Pacific clade.…
Subjects/Keywords: Green turtle;
Ecology;
Conservation;
New Zealand
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APA (6th Edition):
Godoy, D. A. (2016). The ecology and conservation of green turtles (Chelonia mydas) in New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Marine Ecology at Massey University, Albany, New Zealand
. (Thesis). Massey University. Retrieved from http://hdl.handle.net/10179/12200
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Godoy, Daniel A. “The ecology and conservation of green turtles (Chelonia mydas) in New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Marine Ecology at Massey University, Albany, New Zealand
.” 2016. Thesis, Massey University. Accessed January 27, 2021.
http://hdl.handle.net/10179/12200.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Godoy, Daniel A. “The ecology and conservation of green turtles (Chelonia mydas) in New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Marine Ecology at Massey University, Albany, New Zealand
.” 2016. Web. 27 Jan 2021.
Vancouver:
Godoy DA. The ecology and conservation of green turtles (Chelonia mydas) in New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Marine Ecology at Massey University, Albany, New Zealand
. [Internet] [Thesis]. Massey University; 2016. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10179/12200.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Godoy DA. The ecology and conservation of green turtles (Chelonia mydas) in New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Marine Ecology at Massey University, Albany, New Zealand
. [Thesis]. Massey University; 2016. Available from: http://hdl.handle.net/10179/12200
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
10.
Shroll, Erin.
Plant selection, irrigation requirements and stormwater management of Pacific Northwest extensive green roofs.
Degree: MS, iin Horticulture, 2009, Oregon State University
URL: http://hdl.handle.net/1957/12110
► An alternative to traditional roofing, extensive green roofs are contained ecosystems consisting of a drainage layer, a thin media profile which is planted with hardy…
(more)
▼ An alternative to traditional roofing, extensive
green roofs are contained ecosystems consisting of a drainage layer, a thin media profile which is planted with hardy plant species. Extensive
green roof plants must maintain multiple functions while growing in a highly aggregate media at a depth of equal to or less than 15.25 cm. The shallow media depth weighs less and can often be used when retrofitting an existing building with a
green roof. Maximizing functions such as stormwater mitigation requires designing for the purpose of the
green roof goal and for the maintenance plan that will ensure plant health in extreme environments. However, our understanding of these complex and dynamic ecosystems on rooftops is still very limited and management of
green roofs is often an afterthought, rarely taking into account regional differences in climate.
The establishment period of an extensive
green roof is a critical time to promote plant coverage, which often requires irrigation during dry periods. The
Pacific Northwest (PNW) climate is challenging for
green roof management because plants experience cool wet conditions for much of the year yet must survive warm, nearly rainless summers. However, extensive
green roof maintenance is generally minimal unless aesthetics are the primary goal. Maintenance in the second year and the years following includes irrigation during dry periods to keep plants healthy or to enhance
green roof function. The removal of competitive weeds and tree seedlings is also recommended throughout the life of the
green roof.
Extensive
green roofs are increasingly being used to help improve stormwater management. The vegetative portion of an extensive
green roof design is often steered by the structural load that a building can hold along with availability of local products and materials such as media and plants. A lightweight, high aggregate media planted with Sedum species and other succulents is often selected as these components have been successful and work well together. However, with the drive to increase the functional role of extensive
green roofs, media and plant selection must be further investigated to fully understand how we can optimize
green roof efficiency—in our case, stormwater management efficiency, the most requested function of commercial
green roofs.
In this study
green roof plants were provided adequate irrigation in the first summer and throughout establishment. At the start of the second summer, we tested how the eight taxa performed under three different management regimes in the PNW: (i) non-irrigated, ii) irrigated in compliance with Portland, Oregon's floor area ratio (FAR) bonus requirement and iii) according to out horticultural decision resulting in the highest watering regime. We also measured weed pressure across the irrigation treatments. We selected plant taxa based on their potential functional attributes (habitat quality, aesthetic quality, stormwater management proficiency) as well as their availability through the regional nursery trade.
Plants selected were…
Advisors/Committee Members: Lambrinos, John (advisor), Righetti, Tim (committee member).
Subjects/Keywords: Green roofs; Green roofs (Gardening) – Northwest, Pacific
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APA (6th Edition):
Shroll, E. (2009). Plant selection, irrigation requirements and stormwater management of Pacific Northwest extensive green roofs. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/12110
Chicago Manual of Style (16th Edition):
Shroll, Erin. “Plant selection, irrigation requirements and stormwater management of Pacific Northwest extensive green roofs.” 2009. Masters Thesis, Oregon State University. Accessed January 27, 2021.
http://hdl.handle.net/1957/12110.
MLA Handbook (7th Edition):
Shroll, Erin. “Plant selection, irrigation requirements and stormwater management of Pacific Northwest extensive green roofs.” 2009. Web. 27 Jan 2021.
Vancouver:
Shroll E. Plant selection, irrigation requirements and stormwater management of Pacific Northwest extensive green roofs. [Internet] [Masters thesis]. Oregon State University; 2009. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/1957/12110.
Council of Science Editors:
Shroll E. Plant selection, irrigation requirements and stormwater management of Pacific Northwest extensive green roofs. [Masters Thesis]. Oregon State University; 2009. Available from: http://hdl.handle.net/1957/12110
University of Georgia
11.
Shamblin, Brian Michael.
Genetic structure of loggerhead turtle (Caretta caretta) and green turtle (Chelonia mydas) populations nesting in the northwest Atlantic inferred from mitochondrial DNA.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/27297
► Mitochondrial DNA polymorphisms have been widely utilized to assess demographic connectivity of marine turtle rookeries, including those of the southeastern United States of America (USA).…
(more)
▼ Mitochondrial DNA polymorphisms have been widely utilized to assess demographic connectivity of marine turtle rookeries, including those of the southeastern United States of America (USA). This region hosts the largest nesting aggregation of
loggerhead turtles in the Atlantic and one of two globally significant nesting assemblages for the species. Determining the stock structure of the nesting aggregation is important for defining demographically independent nesting populations (management
units) and providing appropriate baseline data for mixed stock analyses of foraging aggregations and stranded turtles. Previous studies based on a 390 base pair fragment of the mitochondrial control region partitioned the southeastern USA loggerhead
turtle nesting aggregation into four management units. I reassessed the population structure of the nesting aggregation using 834 novel samples collected from North Carolina through the Florida panhandle as well as published haplotype frequency data.
Pairwise FST comparisons, exact tests of population differentiation, and analysis of molecular variance (AMOVA) supported the presence of six management units corresponding to beaches from 1) North Carolina through northeastern Florida, 2) central
eastern Florida, 3) southern Florida (southeastern and southwestern), 4) Dry Tortugas, Florida, 5) central western Florida (Sarasota County), and 6) northwest Florida. Despite the increased resolution gained from expanded sampling and larger sample
sizes, the relationship of southernmost rookeries on the Gulf and Atlantic coasts of Florida remained unresolved. To address this question and assess the utility of an expanded control region fragment (817 bp) to refine stock structure, I analyzed 2,260
samples representing twelve rookeries of the southeastern USA aggregation as well as the Cay Sal, Bahamas rookery. This analysis supported the six management units suggested by the earlier study and additionally differentiated southeastern and
southwestern Florida as distinct management units. The Cay Sal and Dry Tortugas rookeries were not genetically differentiated and were grouped as a single management unit, although it is probable that these distant rookeries are demographically isolated.
As previously demonstrated by a published study, use of the larger control region fragment significantly increased population structure detected between western and eastern Atlantic loggerhead turtle rookeries. However, expanded sequences did not
significantly improve resolution of structure among rookeries comprising the southeastern USA nesting aggregation in most comparisons, which were dominated by two common control region haplotypes. The single exception was southeastern Florida rookeries
compared to all others because of the high percentage of CC-A1.3 relative to the common CC-A1.1. Given the ability of marine turtles to colonize sites far from their natal regions and the slow evolutionary rate of the mitochondrial genome relative to
many other vertebrates, haplotype sharing is a common phenomenon among…
Subjects/Keywords: loggerhead turtle; Caretta caretta; green turtle; Chelonia mydas; population structure; mitochondrial DNA; mitogenome
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APA (6th Edition):
Shamblin, B. M. (2014). Genetic structure of loggerhead turtle (Caretta caretta) and green turtle (Chelonia mydas) populations nesting in the northwest Atlantic inferred from mitochondrial DNA. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/27297
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shamblin, Brian Michael. “Genetic structure of loggerhead turtle (Caretta caretta) and green turtle (Chelonia mydas) populations nesting in the northwest Atlantic inferred from mitochondrial DNA.” 2014. Thesis, University of Georgia. Accessed January 27, 2021.
http://hdl.handle.net/10724/27297.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shamblin, Brian Michael. “Genetic structure of loggerhead turtle (Caretta caretta) and green turtle (Chelonia mydas) populations nesting in the northwest Atlantic inferred from mitochondrial DNA.” 2014. Web. 27 Jan 2021.
Vancouver:
Shamblin BM. Genetic structure of loggerhead turtle (Caretta caretta) and green turtle (Chelonia mydas) populations nesting in the northwest Atlantic inferred from mitochondrial DNA. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10724/27297.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shamblin BM. Genetic structure of loggerhead turtle (Caretta caretta) and green turtle (Chelonia mydas) populations nesting in the northwest Atlantic inferred from mitochondrial DNA. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/27297
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
12.
Barr, Julie M.
Community-based sea turtle monitoring and management at Helen Reef, Hatohobei State, Republic of Palau.
Degree: MS, Marine Resource Management, 2006, Oregon State University
URL: http://hdl.handle.net/1957/2266
► Remote areas are frequently homes to regional subpopulations of endangered green sea turtles (Chelonia mydas) and their essential habitat. Local communities are often the users…
(more)
▼ Remote areas are frequently homes to regional subpopulations of endangered
green
sea turtles (Chelonia mydas) and their essential habitat. Local communities are often
the users and primary stewards of this valuable and charismatic resource. Recognizing
this, a Hatohobeian community group in Palau has engaged in longterm
monitoring
and conservation management within Helen Reef Reserve. Here, I report on and
evaluate the motivations, monitoring methods, and results associated with this
program. I provide recommendations for future monitoring and recovery planning of
Helen
green sea turtles based on field results, informal community interviews,
community capacity, and existing literature.
Capturemarkrecapture,
nesting female observation, nest monitoring, hatch success,
collection of tissue samples, and habitat assessment methods and results between April
19, 2005 and December 8, 2005 are provided. A total of 301 nests were recorded with
peak nesting activity in June. All 47 nesting females were measured and tagged and
301 nests were monitored. The total minimum number of emerged hatchlings is
estimated at 24,000. No correlations were found between carapace length and
ii
fecundity or hatch success. Additionally, 50 foraging
green turtles and 6 hawksbill
turtles were tagged.
Limited harvests for local consumption and cultural preservation, as well as beach
habitat protection emerge as the primary near term recommendations. Long term
recommendations focus on continued nesting and improved habitat monitoring toward
a population assessment, the creation of regional and international alliances for
collaborative efforts, and use of satellite telemetry tracking to link foraging and
nesting grounds of Helen turtles.
I have determined several key factors influencing the successful implementation of sea
turtle management and conservation at Helen in terms of (i) the structure of
partnerships; (ii) scales of biological systems and capacity; (iii) relative remoteness;
(iv) balance of costs and benefits; (v) adaptive capacity; and (vi) influence of
traditional systems. Results of case study comparisons show that successful
implementation of sea
turtle conservation and management programs within the
Republic of Palau is more likely when a local community drives the process and has
the qualities of adaptability, capacity for truly bottomup
decentralized management,
recognition of valuable aspects of traditional management systems, and ability to
generate tangible benefits. Lack of adaptive capacity, equitable benefits, civil society
leadership; as well as, topdown
management are identified as key limiting factors for
successful implementation of
turtle conservation and management.
The Helen program emerges as a model for smallscale
community conservation and
management of wide ranging species demonstrating that an organic communitydriven
process is fundamental to successful local endangered species management.
Advisors/Committee Members: Heppell, Selina S. (advisor), Harte, Michael (committee member).
Subjects/Keywords: Green Turtle; Green turtle – Habitat – Conservation – Palau – Hatohobei State
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APA (6th Edition):
Barr, J. M. (2006). Community-based sea turtle monitoring and management at Helen Reef, Hatohobei State, Republic of Palau. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/2266
Chicago Manual of Style (16th Edition):
Barr, Julie M. “Community-based sea turtle monitoring and management at Helen Reef, Hatohobei State, Republic of Palau.” 2006. Masters Thesis, Oregon State University. Accessed January 27, 2021.
http://hdl.handle.net/1957/2266.
MLA Handbook (7th Edition):
Barr, Julie M. “Community-based sea turtle monitoring and management at Helen Reef, Hatohobei State, Republic of Palau.” 2006. Web. 27 Jan 2021.
Vancouver:
Barr JM. Community-based sea turtle monitoring and management at Helen Reef, Hatohobei State, Republic of Palau. [Internet] [Masters thesis]. Oregon State University; 2006. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/1957/2266.
Council of Science Editors:
Barr JM. Community-based sea turtle monitoring and management at Helen Reef, Hatohobei State, Republic of Palau. [Masters Thesis]. Oregon State University; 2006. Available from: http://hdl.handle.net/1957/2266
Colorado State University
13.
Rydbeck, Adam.
Remote versus local controls of east Pacific intraseasonal variability.
Degree: MS(M.S.), Atmospheric Science, 2012, Colorado State University
URL: http://hdl.handle.net/10217/66677
► The Madden-Julian Oscillation (MJO) is the dominant mode of tropical intraseasonal variability and propagates eastward at 5 m/s with primary signals in wind and precipitation.…
(more)
▼ The Madden-Julian Oscillation (MJO) is the dominant mode of tropical intraseasonal variability and propagates eastward at 5 m/s with primary signals in wind and precipitation. During boreal summer, interactions between intraseasonal variability in the eastern Hemisphere and the
east Pacific warm pool are often described as a local amplification of the propagating MJO. However, the precise mechanism by and degree to which intraseasonal variability in the eastern Hemisphere affects the
east Pacific warm pool are not well understood. One school of thought holds that the MJO initiates a dry intraseasonal Kelvin wave response in the west
Pacific that rapidly propagates into the Western Hemisphere and initiates intraseasonal convective variability there. To quantify the relationship between the source (Eastern Hemisphere) and amplification region (
east Pacific warm pool), sensitivity tests in two separate models are used to determine the importance of local versus remote controls of
east Pacific warm pool intraseasonal variability. The two models include the National Center for Atmospheric Research Community Atmosphere Model 3 (CAM3) and the International
Pacific Research Center Regional Atmosphere Model (IRAM). The two models use different schemes to isolate the
east Pacific from eastward-propagating intraseasonal variability that impinges from the west. Removing the influence of the MJO on the
east Pacific warm pool in these two models reveals different insights into local versus remote control of intraseasonal variability in the
east Pacific. The CAM3 produces comparable intraseasonal variability in winds and precipitation in the
east Pacific when Kelvin wave signals from the west are removed, suggesting that the Eastern Hemisphere MJO helps to pace
east Pacific intraseasonal variability, although
east Pacific variability can exist in isolation from the MJO. Thus, the CAM3 supports independent intraseasonal variability in the
east Pacific warm pool that may be phase locked to intraseasonal variability in the Eastern Hemisphere in observations. However, the IRAM has very small
east Pacific intraseasonal variability when isolated from global MJO signals. The weak intraseasonal variability in IRAM may be a result of mean low-level wind biases that cause 30 to 90 day surface flux anomalies to be out of phase with 30 to 90 day precipitation and low level wind anomalies. As a result, the IRAM model does not support an independent local mode of intraseasonal variability in the
east Pacific.
Advisors/Committee Members: Maloney, Eric (advisor), Birner, Thomas (committee member), Niemann, Jeffrey (committee member).
Subjects/Keywords: intraseasonal; Julian Madden oscillation; Pacific; East
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Manager
APA (6th Edition):
Rydbeck, A. (2012). Remote versus local controls of east Pacific intraseasonal variability. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/66677
Chicago Manual of Style (16th Edition):
Rydbeck, Adam. “Remote versus local controls of east Pacific intraseasonal variability.” 2012. Masters Thesis, Colorado State University. Accessed January 27, 2021.
http://hdl.handle.net/10217/66677.
MLA Handbook (7th Edition):
Rydbeck, Adam. “Remote versus local controls of east Pacific intraseasonal variability.” 2012. Web. 27 Jan 2021.
Vancouver:
Rydbeck A. Remote versus local controls of east Pacific intraseasonal variability. [Internet] [Masters thesis]. Colorado State University; 2012. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10217/66677.
Council of Science Editors:
Rydbeck A. Remote versus local controls of east Pacific intraseasonal variability. [Masters Thesis]. Colorado State University; 2012. Available from: http://hdl.handle.net/10217/66677
The Ohio State University
14.
Zerda, Christina Louise.
An Integrated Petrological and Geochemical Approach to
Understanding Magmatism Along the East Pacific Rise.
Degree: MS, Earth Sciences, 2016, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1471827298
► The 65,000 km long Mid-Ocean Ridge system marks the site where oceanic crust is created by the intrusion and eruption of magma formed by decompression…
(more)
▼ The 65,000 km long Mid-Ocean Ridge system marks the
site where oceanic crust is created by the intrusion and eruption
of magma formed by decompression melting in the mantle. Newly
formed oceanic lithosphere spreads at rates from ~ 10 to 200 mm
yr-1, and there is a direct relationship between spreading rate and
the pressure of partial crystallization of magma. The
East Pacific
Rise (EPR) is a fast-spreading ridge that extends from ~ 55°S into
the Gulf of California with ~ 20 axial discontinuities. The segment
from 5°N to 14°N contains the Siqueiros and Clipperton transforms
as well as 5 overlapping spreading centers. These axial
discontinuities have been associated with relatively high pressures
of partial crystallization for erupted magmas by some workers, who
also suggest that magma crystallization beneath the EPR began in
the upper mantle. In order to test this proposal, new pressures of
partial crystallization of magmas from the EPR from 5°N to 14°N
have been calculated using the method of Kelley & Barton,
(2008). Pressures were calculated for 5384 MORB glasses from two
different datasets. One dataset is from the online Petrological
Database (PetDB) and the other is from an internally-consistent
compilation of glass analyses by Gale et al., (2013). No difference
in calculated pressures was found for the two datasets, with both
yielding an average pressure of ~ 218 MPa. After correcting for the
water column and filtering to exclude results for samples that did
not form by cotectic crystallization, the final average pressure of
the ridge was calculated to be 198 ± 3.26 MPa, which is equivalent
to a depth of 6.95 ± 0.115 km. This corresponds to a depth very
close to the base of the crust. The average pressures of partial
crystallization for the Siqueiros (232 ± 25.4 MPa) and Clipperton
(199 ± 21.3 MPa) transforms are virtually identical to those
calculated for normal ridge segments. This leads to the conclusion
that high pressures do not necessarily correlate with axial
discontinuities along this portion of the EPR. About 13% of the
samples do yield high pressures (P = 300 MPa) of crystallization.
Careful filtration of these results using regression methods to
define the MgO contents of glasses lying along the liquid + ol +
plag + cpx cotectic led to the removal of some, but not all,
high-pressure results. Some of the high-pressure glasses have
anomalous chemical compositions (elevated K2O and Al2O3, low CaO)
that appears to reflect assimilation of crustal material, but it is
important to note that magma-crust interaction does not explain all
of the high pressure glasses present along the ridge. High-pressure
glasses from 11°47’N, for example, have compositions that provide
no evidence for magma-crust interaction. The results for these
glasses support the suggestion that crystallization of magmas
erupted along the EPR began at sub-crustal depths. It is concluded
that detailed petrological and geochemical studies of glasses from
selected localities are necessary to better constrain the origin of
high pressure glasses.
Advisors/Committee Members: Barton, Michael (Advisor).
Subjects/Keywords: Geology; Petrology; MORB; East Pacific Rise
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APA ·
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Manager
APA (6th Edition):
Zerda, C. L. (2016). An Integrated Petrological and Geochemical Approach to
Understanding Magmatism Along the East Pacific Rise. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1471827298
Chicago Manual of Style (16th Edition):
Zerda, Christina Louise. “An Integrated Petrological and Geochemical Approach to
Understanding Magmatism Along the East Pacific Rise.” 2016. Masters Thesis, The Ohio State University. Accessed January 27, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1471827298.
MLA Handbook (7th Edition):
Zerda, Christina Louise. “An Integrated Petrological and Geochemical Approach to
Understanding Magmatism Along the East Pacific Rise.” 2016. Web. 27 Jan 2021.
Vancouver:
Zerda CL. An Integrated Petrological and Geochemical Approach to
Understanding Magmatism Along the East Pacific Rise. [Internet] [Masters thesis]. The Ohio State University; 2016. [cited 2021 Jan 27].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1471827298.
Council of Science Editors:
Zerda CL. An Integrated Petrological and Geochemical Approach to
Understanding Magmatism Along the East Pacific Rise. [Masters Thesis]. The Ohio State University; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1471827298
NSYSU
15.
Lue, Tai-feng.
none.
Degree: Master, Public Affairs Management, 2007, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805107-125246
Subjects/Keywords: Green Turtle; New Ecological Paradigm
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APA (6th Edition):
Lue, T. (2007). none. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805107-125246
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lue, Tai-feng. “none.” 2007. Thesis, NSYSU. Accessed January 27, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805107-125246.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lue, Tai-feng. “none.” 2007. Web. 27 Jan 2021.
Vancouver:
Lue T. none. [Internet] [Thesis]. NSYSU; 2007. [cited 2021 Jan 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805107-125246.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lue T. none. [Thesis]. NSYSU; 2007. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805107-125246
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Drexel University
16.
Blanco, Gabriela S.
Movements and behavior of the East Pacific Green Turtle (Chelonia mydas) from Costa Rica.
Degree: 2010, Drexel University
URL: http://hdl.handle.net/1860/3414
► I attached satellite transmitters to study the movements and behavior during internesting and migration of East Pacific green turtles nesting on Nombre de Jesús and…
(more)
▼ I attached satellite transmitters to study the movements and behavior during internesting and migration of East Pacific green turtles nesting on Nombre de Jesús and Zapotillal. Prior to transmitter attachment we preformed an ultrasound scan to determine the turtle’s reproductive status. I obtained information on geostrophic surface currents to simulate the dispersion of hatchlings emerging from Nombre de Jesús. I determined the Estimated clutch frequency (ECFU: mean ± SD) 5.13 ± 1.32 using ultrasound, which was an effective technique to determine the reproductive effort of turtles. Turtles spent the 12 day internesting period in the nearby waters off the nesting beach using mainly an area of 4.5 km2. Depths of dives and depth of water in the area indicated that the turtles dove to the bottom to rest during the day and rested at the surface during the night. After the nesting season, some turtles moved to their foraging areas in Gulf of Papagayo and the Santa Elena Bay, close to the Gulf of Fonseca, and in inshore waters of Panama. During migration the turtles dove mainly to a depth of 5 m or less. During foraging most of the dives were between 5 and 10 m depth. I found three different scenarios for possible hatchling dispersion: 1-hatchlings could be transported offshore and after three months pushed back closer to the coast, 2- hatchlings could be transported north or south remaining along the coast and, 3-hatchlings could be transported to waters offshore still within the Eastern Tropical Pacific (ETP). East Pacific green turtles remained their entire life within the waters of the ETP including females, which carry out limited to-long-distance migrations (5 to 1091 km). The unique characteristics of the area disperse hatchlings to productive areas providing them with enough resources to grow at the early life stages and move to adult foraging areas also in the ETP. The coastal nature of their movements and the high concentration of turtles off the nesting beach make them vulnerable to artisanal fisheries. That, together with intense poaching that occurs on the nesting beach indicates that this population may soon face extinction.
Ph.D., Ecology – Drexel University, 2010
Advisors/Committee Members: Spotila, James R., 1944-.
Subjects/Keywords: Environmental science; Ecology; Green turtle
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APA (6th Edition):
Blanco, G. S. (2010). Movements and behavior of the East Pacific Green Turtle (Chelonia mydas) from Costa Rica. (Thesis). Drexel University. Retrieved from http://hdl.handle.net/1860/3414
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Blanco, Gabriela S. “Movements and behavior of the East Pacific Green Turtle (Chelonia mydas) from Costa Rica.” 2010. Thesis, Drexel University. Accessed January 27, 2021.
http://hdl.handle.net/1860/3414.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Blanco, Gabriela S. “Movements and behavior of the East Pacific Green Turtle (Chelonia mydas) from Costa Rica.” 2010. Web. 27 Jan 2021.
Vancouver:
Blanco GS. Movements and behavior of the East Pacific Green Turtle (Chelonia mydas) from Costa Rica. [Internet] [Thesis]. Drexel University; 2010. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/1860/3414.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Blanco GS. Movements and behavior of the East Pacific Green Turtle (Chelonia mydas) from Costa Rica. [Thesis]. Drexel University; 2010. Available from: http://hdl.handle.net/1860/3414
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Arizona
17.
Wood, James Raymon, 1946-.
THE AMINO ACID REQUIREMENTS OF THE HATCHLING GREEN SEA TURTLE, CHELONIA MYDAS
.
Degree: 1974, University of Arizona
URL: http://hdl.handle.net/10150/290351
Subjects/Keywords: Green turtle.;
Amino acids – Metabolism.
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APA (6th Edition):
Wood, James Raymon, 1. (1974). THE AMINO ACID REQUIREMENTS OF THE HATCHLING GREEN SEA TURTLE, CHELONIA MYDAS
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/290351
Chicago Manual of Style (16th Edition):
Wood, James Raymon, 1946-. “THE AMINO ACID REQUIREMENTS OF THE HATCHLING GREEN SEA TURTLE, CHELONIA MYDAS
.” 1974. Doctoral Dissertation, University of Arizona. Accessed January 27, 2021.
http://hdl.handle.net/10150/290351.
MLA Handbook (7th Edition):
Wood, James Raymon, 1946-. “THE AMINO ACID REQUIREMENTS OF THE HATCHLING GREEN SEA TURTLE, CHELONIA MYDAS
.” 1974. Web. 27 Jan 2021.
Vancouver:
Wood, James Raymon 1. THE AMINO ACID REQUIREMENTS OF THE HATCHLING GREEN SEA TURTLE, CHELONIA MYDAS
. [Internet] [Doctoral dissertation]. University of Arizona; 1974. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10150/290351.
Council of Science Editors:
Wood, James Raymon 1. THE AMINO ACID REQUIREMENTS OF THE HATCHLING GREEN SEA TURTLE, CHELONIA MYDAS
. [Doctoral Dissertation]. University of Arizona; 1974. Available from: http://hdl.handle.net/10150/290351
Florida Atlantic University
18.
Garefino, Victoria E.
INFLUENCE OF UV LIGHT ON VITAMIN D AND IMMUNE FUNCTION OF GREEN (CHELONIA MYDAS) SEA TURTLES WITH FIBROPAPILLOMATOSIS.
Degree: MS, 2020, Florida Atlantic University
URL: http://fau.digital.flvc.org/islandora/object/fau:42609
► Green sea turtles (Chelonia mydas) are an endangered species prone to a debilitating disease called fibropapillomatosis (FP). The aim of this study was to determine…
(more)
▼ Green sea turtles (Chelonia mydas) are an endangered species prone to a debilitating disease called fibropapillomatosis (FP). The aim of this study was to determine the influence of UV light on vitamin D levels and immune function in juvenile green sea turtles with FP. Phagocytosis, plasma vitamin D levels and viral load of ChHV5 were measured for FP- and FP+ turtles kept at the Gumbo Limbo Nature Center (GLNC) and for turtles caught at the St. Lucie power plant. Turtles kept at GLNC were housed in tanks exposed to varying amounts of UV light. Turtles brought into GLNC had lower phagocytosis compared to turtles at the St. Lucie power plant. Individuals exposed to greater UV light had higher plasma vitamin D levels and a more successful recovery. The results of this project will provide rehabilitation facilities with a mechanism to improve the recovery of animals with this disease.
2020
Degree granted:
Collection: FAU
Advisors/Committee Members: Milton, Sarah L. (Thesis advisor), Florida Atlantic University (Degree grantor), Department of Biological Sciences, Charles E. Schmidt College of Science.
Subjects/Keywords: Chelonia mydas; Green turtle – Diseases; Fibropapillomatosis; Ultraviolet radiation; Vitamin D
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Export
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APA (6th Edition):
Garefino, V. E. (2020). INFLUENCE OF UV LIGHT ON VITAMIN D AND IMMUNE FUNCTION OF GREEN (CHELONIA MYDAS) SEA TURTLES WITH FIBROPAPILLOMATOSIS. (Masters Thesis). Florida Atlantic University. Retrieved from http://fau.digital.flvc.org/islandora/object/fau:42609
Chicago Manual of Style (16th Edition):
Garefino, Victoria E. “INFLUENCE OF UV LIGHT ON VITAMIN D AND IMMUNE FUNCTION OF GREEN (CHELONIA MYDAS) SEA TURTLES WITH FIBROPAPILLOMATOSIS.” 2020. Masters Thesis, Florida Atlantic University. Accessed January 27, 2021.
http://fau.digital.flvc.org/islandora/object/fau:42609.
MLA Handbook (7th Edition):
Garefino, Victoria E. “INFLUENCE OF UV LIGHT ON VITAMIN D AND IMMUNE FUNCTION OF GREEN (CHELONIA MYDAS) SEA TURTLES WITH FIBROPAPILLOMATOSIS.” 2020. Web. 27 Jan 2021.
Vancouver:
Garefino VE. INFLUENCE OF UV LIGHT ON VITAMIN D AND IMMUNE FUNCTION OF GREEN (CHELONIA MYDAS) SEA TURTLES WITH FIBROPAPILLOMATOSIS. [Internet] [Masters thesis]. Florida Atlantic University; 2020. [cited 2021 Jan 27].
Available from: http://fau.digital.flvc.org/islandora/object/fau:42609.
Council of Science Editors:
Garefino VE. INFLUENCE OF UV LIGHT ON VITAMIN D AND IMMUNE FUNCTION OF GREEN (CHELONIA MYDAS) SEA TURTLES WITH FIBROPAPILLOMATOSIS. [Masters Thesis]. Florida Atlantic University; 2020. Available from: http://fau.digital.flvc.org/islandora/object/fau:42609
University of Exeter
19.
Stokes, Kimberley Laura.
Ecology of marine turtles under climate change.
Degree: PhD, 2014, University of Exeter
URL: http://hdl.handle.net/10871/21847
► Climate change threatens to disrupt biological systems around the globe, sparking debate over natural capacity for adaptation in a fragmented landscape. Marine turtles are evolutionarily…
(more)
▼ Climate change threatens to disrupt biological systems around the globe, sparking debate over natural capacity for adaptation in a fragmented landscape. Marine turtles are evolutionarily ancient and have survived millions of years of prehistoric climate change, but are threatened by the rapidity of modern warming and a history of severe overexploitation that has left most populations depleted. This thesis explores a nesting aggregation of the green turtle (Chelonia mydas) in northern Cyprus, where a longitudinal programme of both intensive and extensive monitoring enables insight into individual and population level parameters and processes. Nesting on the two coastlines covered by this project is in the early stages of recovery, possibly in response to exhaustive nest protection efforts over the last twenty years. Saturation tagging at one key site allows us to confirm that recruitment of new breeders is an important driver of this trend, and that average clutch frequency has remained stable around three nests per female per year, validating nest-count derived abundance estimates at a regional scale. Concern has been raised, however, regarding recent changes in fishing practices which are impacting the local juvenile neritic phase, which may have a lagged effect on the recovery of this nesting population. A collaborative tracking effort including all other countries with major nesting in the Mediterranean allows us to identify major foraging grounds for this species, with two hotspots accounting for >50% of tracked individuals, as well as coastal and pelagic seasonal corridors of high use. Bycatch levels and mortality rates for turtles in these key areas are largely unknown and should be prioritised for investigation. Hatchling sex ratios from the main study beach are extremely female-biased (estimated 97% female for the twenty year period 1993-2012). A 1 °C rise in average incubation temperatures threatens near complete hatchling feminisation on this beach, whilst a 2 °C rise could reduce hatch success to less than 50%. Thermal effects on hatchling morphometrics are evident, with a 1 °C rise in temperature reducing average length, width and weight by 1%, 2% and 3% respectively. More favourable incubation conditions were found early in the season, in deeper nests laid by larger females, and on beaches of lighter sand. In contrast, adult sex ratios at the main site are male-biased, posing questions regarding sex-specific survival rates and optimal hatchling sex ratios. A phenological shift towards earlier nesting is demonstrated for the first time in this species, and could potentially ameliorate warming effects. Carry-over climate forcing effects from the foraging ground influence the breeding frequency of individuals, driving population level responses in annual magnitude of nesting. This work emphasises the utility and necessity of long-term individual-based monitoring programmes in elucidating population trends and climate responses in iteroparous species with non-annual breeding.
Subjects/Keywords: 597.92; conservation; marine ecology; marine turtle; sea turtle; green turtle; Chelonia; Chelonia mydas; population monitoring; migratory corridor; foraging grounds; sex ratio; climate change; climate forcing
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APA (6th Edition):
Stokes, K. L. (2014). Ecology of marine turtles under climate change. (Doctoral Dissertation). University of Exeter. Retrieved from http://hdl.handle.net/10871/21847
Chicago Manual of Style (16th Edition):
Stokes, Kimberley Laura. “Ecology of marine turtles under climate change.” 2014. Doctoral Dissertation, University of Exeter. Accessed January 27, 2021.
http://hdl.handle.net/10871/21847.
MLA Handbook (7th Edition):
Stokes, Kimberley Laura. “Ecology of marine turtles under climate change.” 2014. Web. 27 Jan 2021.
Vancouver:
Stokes KL. Ecology of marine turtles under climate change. [Internet] [Doctoral dissertation]. University of Exeter; 2014. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10871/21847.
Council of Science Editors:
Stokes KL. Ecology of marine turtles under climate change. [Doctoral Dissertation]. University of Exeter; 2014. Available from: http://hdl.handle.net/10871/21847
University of Georgia
20.
Kang, Kyung-il.
Pathological evaluation of fibropapillomatosis in green sea turtles.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/24421
► Fibropapillomatosis is a neoplastic disease of marine turtles characterized by cutaneous fibropapillomas and occasionally internal fibromas. The prevalence of disease has been increasing. Etiologically a…
(more)
▼ Fibropapillomatosis is a neoplastic disease of marine turtles characterized by cutaneous fibropapillomas and occasionally internal fibromas. The prevalence of disease has been increasing. Etiologically a herpesvirus has been incriminated but
isolation efforts to date have failed. To explore and update current diagnostic and pathological knowledge of this disease, multiple laboratory and field analyses were used, including hematology, blood chemistry, histopathology and in-situ hybridization
on blood and tumors collected from affected and non-affected animals. Green turtles (Chelonia mydas) were captured and subsequently released in a location in the Caribbean on the ease side of Puerto Rico, islands of Culebra and Culebrita. This study
contributes to further understanding of the disease, through comparison of hematology and biochemical parameters in affected and non-affected turtles and evaluation of tumor characteristics and viral involvement using in situ hybridization.
Subjects/Keywords: Fibropapillomatosis; Green turtle; Chelonia mydas; Herpesvirus; In situ hybridization; Hematology; Blood biochemistry; Plasma protein electrophoresis
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APA (6th Edition):
Kang, K. (2014). Pathological evaluation of fibropapillomatosis in green sea turtles. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/24421
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kang, Kyung-il. “Pathological evaluation of fibropapillomatosis in green sea turtles.” 2014. Thesis, University of Georgia. Accessed January 27, 2021.
http://hdl.handle.net/10724/24421.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kang, Kyung-il. “Pathological evaluation of fibropapillomatosis in green sea turtles.” 2014. Web. 27 Jan 2021.
Vancouver:
Kang K. Pathological evaluation of fibropapillomatosis in green sea turtles. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10724/24421.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kang K. Pathological evaluation of fibropapillomatosis in green sea turtles. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/24421
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Glasgow
21.
Godley, Brendan J.
Studies on the ecology and conservation of marine turtles, with particular reference to the Mediterranean.
Degree: PhD, 1998, University of Glasgow
URL: http://theses.gla.ac.uk/75901/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299745
► Studies on the ecology and conservation of marine turtles were undertaken with particular reference to the populations in the eastern Mediterranean: 1) The reproductive biology…
(more)
▼ Studies on the ecology and conservation of marine turtles were undertaken with particular reference to the populations in the eastern Mediterranean: 1) The reproductive biology and threats to both the green turtle {Chelonia mydas) and the loggerhead turtle (Care/ta caretla) nesting in Northern Cyprus (1992-1995) are described. 2) An assessment is made as to the effect of tagging of nesting marine turtles on their resultant behaviour and reproductive success. 3) An investigation is made into the efficacy of using Passive Integrated Transponders (PIT tags) as an allernative method of marking Mediterranean marine turtles. 4) Recent patterns of marine turtle strandings in the Mediterranean are described using datasets from Italy, Greece, Turkey and Cyprus. 5) Results of a survey of the attitudes and knowledge of artisanal fishermen regarding turtles and their bycatch off the coasts of Turkey and Northern Cyprus are presented. 6) Results are given of a small study involving the identification of the dietary items present in the gut of loggerhead turtles in the eastern Mediterranean. 7) An investigation is made into the use of stable isotope analysis of marine turtle proteins to discern trophic patterns in marine turtles. 8) Concentrations and patterns of organochlorine contaminants in marine turtles from Mediterranean and Atlantic waters are described and discussed in relation to feeding ecology. 9) Concentration of heavy metals in Mediterranean marine turtle tissues are described. 10) Results are presented regarding the molecular profile of loggerhead turtles nesting in Northern Cyprus and comparison is made with populations nesting in Greece and Turkey. 11) Patterns of marine turtle mortality in British waters (1992-1996) are described.
Subjects/Keywords: 577; Green turtle; Chelonia mydas; Loggerhead
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APA (6th Edition):
Godley, B. J. (1998). Studies on the ecology and conservation of marine turtles, with particular reference to the Mediterranean. (Doctoral Dissertation). University of Glasgow. Retrieved from http://theses.gla.ac.uk/75901/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299745
Chicago Manual of Style (16th Edition):
Godley, Brendan J. “Studies on the ecology and conservation of marine turtles, with particular reference to the Mediterranean.” 1998. Doctoral Dissertation, University of Glasgow. Accessed January 27, 2021.
http://theses.gla.ac.uk/75901/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299745.
MLA Handbook (7th Edition):
Godley, Brendan J. “Studies on the ecology and conservation of marine turtles, with particular reference to the Mediterranean.” 1998. Web. 27 Jan 2021.
Vancouver:
Godley BJ. Studies on the ecology and conservation of marine turtles, with particular reference to the Mediterranean. [Internet] [Doctoral dissertation]. University of Glasgow; 1998. [cited 2021 Jan 27].
Available from: http://theses.gla.ac.uk/75901/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299745.
Council of Science Editors:
Godley BJ. Studies on the ecology and conservation of marine turtles, with particular reference to the Mediterranean. [Doctoral Dissertation]. University of Glasgow; 1998. Available from: http://theses.gla.ac.uk/75901/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299745
University of Georgia
22.
Bloodgood, Jennifer Claire Garrison.
Evaluating green sea turtle (Chelonia mydas) nutritional needs and the effectiveness of education at a sea turtle rehabilitation center.
Degree: 2017, University of Georgia
URL: http://hdl.handle.net/10724/36936
► There are seven species of sea turtles worldwide, and all are of conservation concern. When sea turtles are found stranded, injured or diseased, they are…
(more)
▼ There are seven species of sea turtles worldwide, and all are of conservation concern. When sea turtles are found stranded, injured or diseased, they are often rescued and brought into rehabilitation care facilities such as the Georgia Sea
Turtle Center (GSTC). During rehabilitation, proper nutrition is paramount to the healing process. Green sea turtles are unique among the sea turtles in that hatchlings and young juveniles are carnivorous while later life history stages (juvenile to
adult) are primarily herbivorous. Current understanding of this species’ dietary requirements is poor and, since proper nutrition is key to recovery, this can significantly impact the rehabilitation process of injured or diseased green sea turtles. One
goal of this project was to compare nutritional parameters of rehabilitated green sea turtles to baseline nutritional parameters in healthy free-ranging green sea turtles in order to understand the impact of diet on health and recovery during
rehabilitation. A suite of blood nutritional parameters, stable isotope and fatty acid analyses, and gastrointestinal flora (using metagenomics) were evaluated. Because green turtles are an endangered species, rehabilitation and release of healthy
animals is important to the status of wild populations. Rehabilitation, however, is a contentious issue. Some people believe it is a diversion of resources, but most people believe rehabilitation of endangered species is worthwhile. One thing most people
agree on is the value of rehabilitation education. It has been shown that rehabilitation centers with public education as a major objective play a critical role in conservation. I proposed that the GSTC and other similar facilities can act as boundary
organizations for conservation, translating scientific research in a way the general population can enjoy and get excited about. In order to study this concept, I developed and implemented survey instruments for use within the education department at the
GSTC. Information gained from this study will enable rehabilitation centers to understand how they can serve as boundary organizations for conservation as well as how they can make dietary modifications that will enhance the recovery process of green sea
turtles.
Subjects/Keywords: boundary organization; Chelonia mydas; environmental attitudes; green sea turtle; human dimensions; metagenomics; rehabilitation; stable isotopes
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APA (6th Edition):
Bloodgood, J. C. G. (2017). Evaluating green sea turtle (Chelonia mydas) nutritional needs and the effectiveness of education at a sea turtle rehabilitation center. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/36936
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bloodgood, Jennifer Claire Garrison. “Evaluating green sea turtle (Chelonia mydas) nutritional needs and the effectiveness of education at a sea turtle rehabilitation center.” 2017. Thesis, University of Georgia. Accessed January 27, 2021.
http://hdl.handle.net/10724/36936.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bloodgood, Jennifer Claire Garrison. “Evaluating green sea turtle (Chelonia mydas) nutritional needs and the effectiveness of education at a sea turtle rehabilitation center.” 2017. Web. 27 Jan 2021.
Vancouver:
Bloodgood JCG. Evaluating green sea turtle (Chelonia mydas) nutritional needs and the effectiveness of education at a sea turtle rehabilitation center. [Internet] [Thesis]. University of Georgia; 2017. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10724/36936.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bloodgood JCG. Evaluating green sea turtle (Chelonia mydas) nutritional needs and the effectiveness of education at a sea turtle rehabilitation center. [Thesis]. University of Georgia; 2017. Available from: http://hdl.handle.net/10724/36936
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Georgia
23.
Page-Karjian, Cynthia Anne.
Investigation of the natural history of chelonid fibropapilloma-associated herpesvirus infection in green sea turtles (Chelonia mydas).
Degree: 2015, University of Georgia
URL: http://hdl.handle.net/10724/33631
► Fibropapillomatosis (FP) is an infectious, neoplastic disease of sea turtles in circumtropical coastal ocean waters worldwide. FP tumors can cause debilitation by hampering turtles’ feeding,…
(more)
▼ Fibropapillomatosis (FP) is an infectious, neoplastic disease of sea turtles in circumtropical coastal ocean waters worldwide. FP tumors can cause debilitation by hampering turtles’ feeding, movement, and vision, and visceral tumors can
cause organ failure. Fibropapillomatosis is panzootic in free-ranging green sea turtles (Chelonia mydas), and is also a concern in rehabilitating turtles because it requires extensive quarantine measures and complicates prognoses. An alphaherpesvirus,
designated chelonid fibropapilloma-associated herpesvirus (CFPHV), is consistently identified in FP tumors, and cell-free tumor extracts successfully transmitted the disease. CFPHV was also identified in some normal turtles via serology and polymerase
chain reaction (PCR). Despite numerous studies, the actual pathogenesis of CFPHV, its nature of persistence or latency, and its transmission dynamics are not yet fully understood. The objective of this study was to investigate aspects of CFPHV natural
history dynamics in free-ranging and rehabilitating green turtles with and without FP. First, nested PCR was used to identify CFPHV DNA in skin from tumored and non-tumored, free-ranging green turtles, and combined with laser capture microdissection to
identify CFPHV DNA in microscopically separated epidermis and dermis sections of non-tumored skin. A retrospective case series analysis was performed to describe the biology and survival rates of rehabilitating turtles with FP, and evaluate clinical
parameters as survivorship predictors. To investigate the relationship between CFPHV loads and clinical disease, and identify potential routes of viral shedding, a quantitative PCR (qPCR) assay was developed, validated, and applied to various biological
samples taken from tumored and non-tumored, free-ranging and rehabilitating green turtles. The qPCR data provide relevant, novel evidence for CFPHV DNA localization and mobilization in symptomatic and asymptomatic turtles. CFPHV DNA presence in blood
cells may represent a critical viral life cycle phase and transport mechanism, and CFPHV DNA in urine suggests a previously unknown route of transmission. Quantitative CFPHV DNA data also show that, in addition to cutaneous tissues, kidney and nerve
cells play a role in CFPHV pathogenesis. Practical application of the presented information will aid in the evaluation of symptomatic and asymptomatic turtles, helping to prevent transmission opportunities among captive turtles and informing management
decisions for free-ranging populations.
Subjects/Keywords: Chelonia mydas; Fibropapillomatosis; Green turtle; CFPHV; Chelonid fibropapilloma-associated herpesvirus; Nested PCR; Quantitative PCR; Rehabilitation
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APA (6th Edition):
Page-Karjian, C. A. (2015). Investigation of the natural history of chelonid fibropapilloma-associated herpesvirus infection in green sea turtles (Chelonia mydas). (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/33631
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Page-Karjian, Cynthia Anne. “Investigation of the natural history of chelonid fibropapilloma-associated herpesvirus infection in green sea turtles (Chelonia mydas).” 2015. Thesis, University of Georgia. Accessed January 27, 2021.
http://hdl.handle.net/10724/33631.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Page-Karjian, Cynthia Anne. “Investigation of the natural history of chelonid fibropapilloma-associated herpesvirus infection in green sea turtles (Chelonia mydas).” 2015. Web. 27 Jan 2021.
Vancouver:
Page-Karjian CA. Investigation of the natural history of chelonid fibropapilloma-associated herpesvirus infection in green sea turtles (Chelonia mydas). [Internet] [Thesis]. University of Georgia; 2015. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/10724/33631.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Page-Karjian CA. Investigation of the natural history of chelonid fibropapilloma-associated herpesvirus infection in green sea turtles (Chelonia mydas). [Thesis]. University of Georgia; 2015. Available from: http://hdl.handle.net/10724/33631
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Central Florida
24.
Long, Christopher.
Testing For Indirect Benefits Of Polyandry In The Florida Green Turtle.
Degree: 2013, University of Central Florida
URL: https://stars.library.ucf.edu/etd/2766
► Behavioral studies in the green turtle (Chelonia mydas) have indicated that promiscuous mating is commonplace. Though it has been shown that there is much variation…
(more)
▼ Behavioral studies in the
green turtle (Chelonia mydas) have indicated that promiscuous mating is commonplace. Though it has been shown that there is much variation in the rate of polyandry (females mating with multiple males), the drivers behind polyandry in this species are unknown. It has been speculated, but never demonstrated, that indirect benefits (fitness benefits resulting from offspring genetic diversity) play a role. However, previous tests of this hypothesis have limited scope of inference due to lack of environmental control. In this thesis, I attempted to study the indirect benefits of polyandry in Archie Carr National Wildlife Refuge (ACNWR)
green turtles, limiting environmental variation by selecting nests over two week periods in a small subset of the ACNWR. Through the use of highly polymorphic microsatellite markers, I show that 85.7% of ACNWR
green turtle females mate with multiple males, the highest rate yet reported for
green turtles. I was successful in limiting environmental variation; however, I was unable to make comparisons among nests with one or multiple fathers because of a limited sample size of single father nests. Regardless, my thesis provides preliminary evidence (number of males per nest) that the density of males off Florida’s beaches may be relatively high, which is expected to be a driver behind the evolution of polyandry and likely plays a large role both in this population and the prevalence of multiple paternity in
green turtles as a whole
Advisors/Committee Members: Weishampel, John.
Subjects/Keywords: Green turtle; polyandry; mating; behavior; paternity; microsatellite; Biology; Dissertations, Academic – Sciences, Sciences – Dissertations, Academic
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CSE |
Export
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APA (6th Edition):
Long, C. (2013). Testing For Indirect Benefits Of Polyandry In The Florida Green Turtle. (Masters Thesis). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/2766
Chicago Manual of Style (16th Edition):
Long, Christopher. “Testing For Indirect Benefits Of Polyandry In The Florida Green Turtle.” 2013. Masters Thesis, University of Central Florida. Accessed January 27, 2021.
https://stars.library.ucf.edu/etd/2766.
MLA Handbook (7th Edition):
Long, Christopher. “Testing For Indirect Benefits Of Polyandry In The Florida Green Turtle.” 2013. Web. 27 Jan 2021.
Vancouver:
Long C. Testing For Indirect Benefits Of Polyandry In The Florida Green Turtle. [Internet] [Masters thesis]. University of Central Florida; 2013. [cited 2021 Jan 27].
Available from: https://stars.library.ucf.edu/etd/2766.
Council of Science Editors:
Long C. Testing For Indirect Benefits Of Polyandry In The Florida Green Turtle. [Masters Thesis]. University of Central Florida; 2013. Available from: https://stars.library.ucf.edu/etd/2766
University of Tasmania
25.
Litzow, MA.
Climate forcing and sudden change in marine ecosystems.
Degree: 2014, University of Tasmania
URL: https://eprints.utas.edu.au/22900/1/Litzow_whole_thesis.pdf
► Rationale—Continental shelf ecosystems occasionally undergo "regime shifts" – abrupt reorganization events that can have deleterious social and economic effects on fishing communities that rely on…
(more)
▼ Rationale—Continental shelf ecosystems occasionally undergo "regime shifts"
– abrupt reorganization events that can have deleterious social and economic effects
on fishing communities that rely on affected species. Regime shifts are often
interpreted as transitions to alternative ecosystem states after external perturbations
such as fishing pressure cross a critical threshold; they have also been related to shifts
in modes of internal climate variability, such as the Pacific Decadal Oscillation and
North Atlantic Oscillation. However, hypotheses explaining regime shifts are
extremely difficult to test, given the multivariate nature of both stressors and
community response, the frequent paucity of data at adequate spatial and temporal
scales, possible non-linear and non-stationary relationships, and the use of
observational data that preclude strong inference. Furthermore, regime shifts have
often been invoked to explain ecological change without the consideration of
competing models, such as the accumulation of more gradual change over time. As a
result, both the nature of community-level biological change in continental shelf
systems (regime shifts vs. more gradual change), and the identity of factors producing
observed change, remain poorly resolved. Given increasing anthropogenic
disturbance to continental shelf ecosystems globally, there is a need both for better
understanding of the dynamics underlying sudden ecological change, and for tools
providing early detection of ecosystem change to allow for proactive management
measures that might minimize associated socio-economic disruption. Finally, the
regime shift concept is largely based on work in North Atlantic and North Pacific
ecosystems, and there is a need for studies in other areas to determine if the regime
shift model is widely applicable.
Approach—In many continental shelf systems, long-term biological
observations that are necessary for testing hypotheses concerning decadal-scale
ecological change are extremely limited. The first four chapters of this thesis use the
northeast Pacific as a model system, as this region is home to one of the best extant
datasets of long term, large-spatial scale biological observations globally. I compiled
a set of 38 climatic time series (regional climate parameters and large-scale indices)
and 78 biological time series (mostly production or abundance estimates for commercially-important fish and invertebrate populations), from the 1960s to the
present, covering the continental shelf between 30°N and 65°N. This dataset allowed
me to evaluate internal climate variability, commercial fishing and incremental
climate change as factors explaining decadal-scale biological variability (Chapter 1);
test competing models of gradual change and regime shifts for explaining decadalscale
ecological variability (Chapter 2); develop an approach for evaluating possible
ecosystem shifts at the ends of time series (Chapter 2); test for non-stationary
biological responses to climate perturbations (Chapter…
Subjects/Keywords: climate change; regime shifts; marine ecosystems; north Pacific; south-east Australia
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APA ·
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MLA ·
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CSE |
Export
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APA (6th Edition):
Litzow, M. (2014). Climate forcing and sudden change in marine ecosystems. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/22900/1/Litzow_whole_thesis.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Litzow, MA. “Climate forcing and sudden change in marine ecosystems.” 2014. Thesis, University of Tasmania. Accessed January 27, 2021.
https://eprints.utas.edu.au/22900/1/Litzow_whole_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Litzow, MA. “Climate forcing and sudden change in marine ecosystems.” 2014. Web. 27 Jan 2021.
Vancouver:
Litzow M. Climate forcing and sudden change in marine ecosystems. [Internet] [Thesis]. University of Tasmania; 2014. [cited 2021 Jan 27].
Available from: https://eprints.utas.edu.au/22900/1/Litzow_whole_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Litzow M. Climate forcing and sudden change in marine ecosystems. [Thesis]. University of Tasmania; 2014. Available from: https://eprints.utas.edu.au/22900/1/Litzow_whole_thesis.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
26.
White, Keith.
Assessing the Accuracy of Vertical Profiles of Heating and Vertical Motion in the Tropical Eastern Pacific.
Degree: MS, Atmospheric Sciences, 2015, Texas A&M University
URL: http://hdl.handle.net/1969.1/156365
► Vertical profiles of heating (Q1) are a result of the interaction between radiative heating, eddy sensible heat transport, and latent heating from cloud and precipitation…
(more)
▼ Vertical profiles of heating (Q1) are a result of the interaction between radiative heating, eddy sensible heat transport, and latent heating from cloud and precipitation systems. The third component is the largest by an order of magnitude in deep convective regions like the intertropical convergence zone (ITCZ). Vertical motion (ω) is often used as a proxy for Q1 and, in regions lacking in situ observations, ω profiles from model reanalyses are commonly used to make inferences about large-scale circulations and climate sensitivity. In the
East Pacific (EP) ITCZ, ω profiles exhibit large variability between reanalyses and have a bottom-heavy shape centered near 800 hPa that contrasts with the 400 hPa peak in the West
Pacific (WP) warm pool. Rainfall between the two regions is similar; however, stratiform rain fractions are higher in the EP than the WP, and the low-level ω peak in the profiles persists even during El Niño, when precipitation systems become similar between the two regions. These facts all point towards erroneous reanalysis profiles in the EP.
Echo statistics from the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) and the Dual-frequency Precipitation Radar (DPR) aboard the Global Precipitation Measurement (GPM) satellite are examined across the tropical
Pacific. The DPR Ku-band is more sensitive to upper level, low-reflectivity cloud and sees more near-surface echo than the PR, but the overall echo statistics are generally similar. The addition of the DPR Ka-band high sensitivity scans further enhances the DPR sensitivity to upper level cloud, but echo statistics are still not substantially different than TRMM. Utilizing the 16-year TRMM climatology for increased sampling, previously known differences in convection between the EP and WP are confirmed, but they aren’t great enough to justify such a large discrepancy in reanalysis ω profiles.
The relationships between Q1 and ω to rainfall statistics in select tropical field campaigns are also investigated. In all cases, the magnitude and height of the peak values of each variable increase with increasing stratiform rain fraction, further suggesting that the EP should have top-heavy rather than bottom-heavy heating and ω because of its higher stratiform rain fraction.
Advisors/Committee Members: Schumacher, Courtney (advisor), Korty, Robert (committee member), Nowotarski, Christopher (committee member), Giese, Benjamin (committee member).
Subjects/Keywords: East Pacific; Reanalysis; Vertical Motion; Heating; TRMM; GPM
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
White, K. (2015). Assessing the Accuracy of Vertical Profiles of Heating and Vertical Motion in the Tropical Eastern Pacific. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156365
Chicago Manual of Style (16th Edition):
White, Keith. “Assessing the Accuracy of Vertical Profiles of Heating and Vertical Motion in the Tropical Eastern Pacific.” 2015. Masters Thesis, Texas A&M University. Accessed January 27, 2021.
http://hdl.handle.net/1969.1/156365.
MLA Handbook (7th Edition):
White, Keith. “Assessing the Accuracy of Vertical Profiles of Heating and Vertical Motion in the Tropical Eastern Pacific.” 2015. Web. 27 Jan 2021.
Vancouver:
White K. Assessing the Accuracy of Vertical Profiles of Heating and Vertical Motion in the Tropical Eastern Pacific. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/1969.1/156365.
Council of Science Editors:
White K. Assessing the Accuracy of Vertical Profiles of Heating and Vertical Motion in the Tropical Eastern Pacific. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/156365
Texas A&M University
27.
Huaman Chuquihuaccha, Lidia.
Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR.
Degree: MS, Atmospheric Sciences, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/174651
► In the East Pacific intertropical convergence zone (ITCZ), Tropical Rainfall Measuring Mission (TRMM) radar-based latent heating retrievals suggest a top-heavy structure; however, the TRMM precipitation…
(more)
▼ In the
East Pacific intertropical convergence zone (ITCZ), Tropical Rainfall Measuring
Mission (TRMM) radar-based latent heating retrievals suggest a top-heavy structure;
however, the TRMM precipitation radar (PR) underestimates light precipitation (< 0.4 mm
h?1) from shallow convection and the low-level latent heating associated with this precipitation.
Thus, this study uses observations of stratiform and deep convective precipitation
from the TRMM PR and shallow precipitation from the more sensitive CloudSat cloud
profiling radar (CPR) to assess the seasonal vertical structure of latent heating in the
East
Pacific ITCZ for 1998-2015. This study is complemented with three reanalysis
datasets (MERRA2, ERA-Interim, and NCEP NCAR) to analyze the meridional
circulation changes linked to variations in the ITCZ heating profiles.
There is a distinct seasonal cycle in the TRMM/CloudSat latent heating profiles in the
East Pacific ITCZ. During DJF, latent heating peaks around 850 hPa because of the predominance
of rain from shallow convection. The heating peak rises to 700 hPa during
MAM as the contribution from deep convective rain increases along with the presence of a
mid-level inflow south the ITCZ. During JJA and SON, stratiform precipitation increases
significantly and heating is more equally distributed throughout the troposphere with double
peaks at 700 and 400 hPa; the lower peak is related to the strong shallow overturning
circulation. In addition, the
East Pacific has a meridional slope in latent heating throughout
the year as a result of the prevalence of shallow convection in the southern part of the
ITCZ and deep convection in the northern part of the ITCZ. This slope is weakest during
MAM when a double ITCZ structure exists. Reanalyses only capture certain aspects of this
seasonal cycle in the
East Pacific ITCZ. While the reanalyses agree that the most bottomheavy
heating occurs in DJF and the most top-heavy heating occurs in JJA, they greatly
underestimate the amount of heating aloft compared to the satellite retrievals throughout
the year. This disagreement has serious implications for how the meridional circulation is
captured in this region with reanalyses showing varying ability in representing the shallow
meridional circulation and deeper Hadley cell overturning in the
East Pacific.
Advisors/Committee Members: Schumacher, Courtney (advisor), Panetta, Lee (committee member), Rapp, Anita (committee member), Giese, Benjamin (committee member).
Subjects/Keywords: Intertropical Convergence Zone; East Pacific; TRMM; CLOUDSAT; Latent heating
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huaman Chuquihuaccha, L. (2018). Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174651
Chicago Manual of Style (16th Edition):
Huaman Chuquihuaccha, Lidia. “Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR.” 2018. Masters Thesis, Texas A&M University. Accessed January 27, 2021.
http://hdl.handle.net/1969.1/174651.
MLA Handbook (7th Edition):
Huaman Chuquihuaccha, Lidia. “Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR.” 2018. Web. 27 Jan 2021.
Vancouver:
Huaman Chuquihuaccha L. Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/1969.1/174651.
Council of Science Editors:
Huaman Chuquihuaccha L. Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174651
Texas A&M University
28.
Huaman Chuquihuaccha, Lidia.
Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR.
Degree: MS, Atmospheric Sciences, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/174650
► In the East Pacific intertropical convergence zone (ITCZ), Tropical Rainfall Measuring Mission (TRMM) radar-based latent heating retrievals suggest a top-heavy structure; however, the TRMM precipitation…
(more)
▼ In the
East Pacific intertropical convergence zone (ITCZ), Tropical Rainfall Measuring
Mission (TRMM) radar-based latent heating retrievals suggest a top-heavy structure;
however, the TRMM precipitation radar (PR) underestimates light precipitation (< 0.4 mm
h?1) from shallow convection and the low-level latent heating associated with this precipitation.
Thus, this study uses observations of stratiform and deep convective precipitation
from the TRMM PR and shallow precipitation from the more sensitive CloudSat cloud
profiling radar (CPR) to assess the seasonal vertical structure of latent heating in the
East
Pacific ITCZ for 1998-2015. This study is complemented with three reanalysis
datasets (MERRA2, ERA-Interim, and NCEP NCAR) to analyze the meridional
circulation changes linked to variations in the ITCZ heating profiles.
There is a distinct seasonal cycle in the TRMM/CloudSat latent heating profiles in the
East Pacific ITCZ. During DJF, latent heating peaks around 850 hPa because of the predominance
of rain from shallow convection. The heating peak rises to 700 hPa during
MAM as the contribution from deep convective rain increases along with the presence of a
mid-level inflow south the ITCZ. During JJA and SON, stratiform precipitation increases
significantly and heating is more equally distributed throughout the troposphere with double
peaks at 700 and 400 hPa; the lower peak is related to the strong shallow overturning
circulation. In addition, the
East Pacific has a meridional slope in latent heating throughout
the year as a result of the prevalence of shallow convection in the southern part of the
ITCZ and deep convection in the northern part of the ITCZ. This slope is weakest during
MAM when a double ITCZ structure exists. Reanalyses only capture certain aspects of this
seasonal cycle in the
East Pacific ITCZ. While the reanalyses agree that the most bottomheavy
heating occurs in DJF and the most top-heavy heating occurs in JJA, they greatly
underestimate the amount of heating aloft compared to the satellite retrievals throughout
the year. This disagreement has serious implications for how the meridional circulation is
captured in this region with reanalyses showing varying ability in representing the shallow
meridional circulation and deeper Hadley cell overturning in the
East Pacific.
Advisors/Committee Members: Schumacher, Courtney (advisor), Panetta, Lee (committee member), Rapp, Anita (committee member), Giese, Benjamin (committee member).
Subjects/Keywords: Intertropical Convergence Zone; East Pacific; TRMM; CLOUDSAT; Latent heating
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huaman Chuquihuaccha, L. (2018). Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174650
Chicago Manual of Style (16th Edition):
Huaman Chuquihuaccha, Lidia. “Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR.” 2018. Masters Thesis, Texas A&M University. Accessed January 27, 2021.
http://hdl.handle.net/1969.1/174650.
MLA Handbook (7th Edition):
Huaman Chuquihuaccha, Lidia. “Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR.” 2018. Web. 27 Jan 2021.
Vancouver:
Huaman Chuquihuaccha L. Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/1969.1/174650.
Council of Science Editors:
Huaman Chuquihuaccha L. Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174650
North Carolina State University
29.
Monigle, Patrick W.
Seismic tremor at the 9°50'N East Pacific Rise eruption site.
Degree: MS, Marine, Earth and Atmospheric Sciences, 2009, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/1112
► Ocean bottom seismic observations within the 9°50’ N region of the East Pacific Rise indicate persistent, low-amplitude tremor activity throughout the October 2003 through February…
(more)
▼ Ocean bottom seismic observations within the 9°50’ N region of the
East Pacific Rise indicate persistent, low-amplitude tremor activity throughout the October 2003 through February 2007 period of monitoring. These signals exhibit either mono- or polychromatic spectral characteristics, with a ~6 Hz fundamental frequency and up to two harmonics. Individual events cannot be correlated between nearby (<1 km) stations, implying the presence of multiple, small-amplitude sources positioned within the shallow crust. Tremor exhibits a semi-diurnal periodicity, with some stations recording activity during times of increasing tidal extension and others detecting tremor signals during times of increasing compression. The amplitude, duration, and rate of activity also correlate positively with fortnightly changes in the amplitude of the tides. These spatio-temporal patterns are consistent with tremor generation in response to tidally modulated fluid flow within a network of shallow cracks. Tremor energy flux is spatially and temporally heterogeneous; however, there are extended periods of greater and lesser activity that can be tracked across portions of the array. Despite their shallow crustal origin, changes in tremor amplitude and spectral character occur in the months prior to a major microearthquake swarm and inferred seafloor spreading event on 22 January 2006, with an increase in the degree of correlation between tremor activity and tidal strain observed in the weeks leading up to this event. After the spreading event, two eruption-surviving stations near the axis continue to show high rates of tremor activity; whereas, these signals are suppressed at the single station recovered from the near-axis flanks. This off-axis quiescence may result from the dike-induced closing of cracks, or perhaps from the emplacement of impermeable flows near the station.
Advisors/Committee Members: Dr. DelWayne Bohnenstiehl, Committee Chair (advisor), Dr. Lara Wagner, Committee Member (advisor), Dr. James Hibbard, Committee Member (advisor).
Subjects/Keywords: volcanic eruption; seismic tremor; East Pacific Rise; tidal influences
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APA ·
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CSE |
Export
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Manager
APA (6th Edition):
Monigle, P. W. (2009). Seismic tremor at the 9°50'N East Pacific Rise eruption site. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/1112
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Monigle, Patrick W. “Seismic tremor at the 9°50'N East Pacific Rise eruption site.” 2009. Thesis, North Carolina State University. Accessed January 27, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/1112.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Monigle, Patrick W. “Seismic tremor at the 9°50'N East Pacific Rise eruption site.” 2009. Web. 27 Jan 2021.
Vancouver:
Monigle PW. Seismic tremor at the 9°50'N East Pacific Rise eruption site. [Internet] [Thesis]. North Carolina State University; 2009. [cited 2021 Jan 27].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/1112.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Monigle PW. Seismic tremor at the 9°50'N East Pacific Rise eruption site. [Thesis]. North Carolina State University; 2009. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1112
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
30.
Moore, Aerona.
Primitive melt recharge, and magma-mush mixing in the weeks and months preceding the 2005-06 eruption, EPR, 9˚46’N-9˚56’N.
Degree: School of Earth and Ocean Sciences, 2013, University of Victoria
URL: http://hdl.handle.net/1828/4698
► At fast spreading ridges such as the East Pacific Rise (EPR) volcanic eruptions are predicted to occur on a decadal timescale. Due to the limited…
(more)
▼ At fast spreading ridges such as the
East Pacific Rise (EPR) volcanic eruptions are predicted to occur on a decadal timescale. Due to the limited ability to observe submarine eruptions, little is known about the magmatic processes occurring in the underlying magma chamber leading up to a volcanic event, including differentiation and magma mixing. The recent 2005-06 eruption at 9˚46’N-9˚56’N along the EPR provides a unique opportunity to gain a better understanding of rates of magma transport and magma replenishment associated with a typical eruption. This study examines the geochemistry of phenocrysts from the 2005-06 eruption in order to determine if they are in equilibrium with their host melt, or if magma mixing occurred prior to eruption. A diffusion model is used to model those crystals which are out of equilibrium with their erupted host to determine timescales of magma mixing. The major and trace element contents of plagioclase and olivine phenocrysts provides evidence for melts both more evolved (> 3.5 wt % MgO) and more primitive (< 8.8 wt % MgO) than those found within the host lava (7.7-8.3 wt % MgO; Goss et al., 2010). Glomerocrysts and resorbed crystals in equilibrium with evolved melts (3.5-6.5 wt % MgO) suggests an origin in a roof mush zone, and were disrupted and entrained into their host melt within days of eruption. Modelling of the zoning profiles of phenocrysts suggest the 2005-06 eruption was likely triggered by an influx of hotter, more primitive melt (~ 9.0 wt % MgO) which was injected into the melt lens a few weeks to months prior to the eruption. With decreasing time before eruption, there is an overall increase in the number of crystals with modelled timescales representing mixing events in the magma chamber. This increase in modelled timescales appears to correlate with the increase in seismic activity recorded prior to the eruption (Tolstoy et al., 2006). This suggests magma mixing events within the underlying magma chamber may be linked to seismic activity at fast spreading ridges.
Advisors/Committee Members: Coogan, Laurence (supervisor).
Subjects/Keywords: mid-ocean ridge; basalt; diffusion modelling; East Pacific Rise
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APA (6th Edition):
Moore, A. (2013). Primitive melt recharge, and magma-mush mixing in the weeks and months preceding the 2005-06 eruption, EPR, 9˚46’N-9˚56’N. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/4698
Chicago Manual of Style (16th Edition):
Moore, Aerona. “Primitive melt recharge, and magma-mush mixing in the weeks and months preceding the 2005-06 eruption, EPR, 9˚46’N-9˚56’N.” 2013. Masters Thesis, University of Victoria. Accessed January 27, 2021.
http://hdl.handle.net/1828/4698.
MLA Handbook (7th Edition):
Moore, Aerona. “Primitive melt recharge, and magma-mush mixing in the weeks and months preceding the 2005-06 eruption, EPR, 9˚46’N-9˚56’N.” 2013. Web. 27 Jan 2021.
Vancouver:
Moore A. Primitive melt recharge, and magma-mush mixing in the weeks and months preceding the 2005-06 eruption, EPR, 9˚46’N-9˚56’N. [Internet] [Masters thesis]. University of Victoria; 2013. [cited 2021 Jan 27].
Available from: http://hdl.handle.net/1828/4698.
Council of Science Editors:
Moore A. Primitive melt recharge, and magma-mush mixing in the weeks and months preceding the 2005-06 eruption, EPR, 9˚46’N-9˚56’N. [Masters Thesis]. University of Victoria; 2013. Available from: http://hdl.handle.net/1828/4698
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