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Oregon State University
1.
Archer, Pamela Emily.
Re‐establishment of the native oyster, Ostrea conchaphila, in Netarts Bay, Oregon, USA.
Degree: MS, Marine Resource Management, 2008, Oregon State University
URL: http://hdl.handle.net/1957/9542 
► Olympia oysters, “Ostrea conchaphila,” were once common along the west coast of North America. A popular delicacy, native oyster populations began to decline in the…
(more)
▼ Olympia oysters, “Ostrea conchaphila,” were once common along the west coast of North America. A popular delicacy, native oyster populations began to decline in the late 1800’s due to over‐harvest, degraded water quality, and habitat loss. Interest in re‐establishing the native oyster in a small Oregon estuary,
Netarts Bay, culminated in a partnership among The Nature Conservancy, the National Oceanic and Atmospheric Administration, the Oregon Watershed Enhancement Board, and Oregon State University. This study was designed to assess the reestablishment progress of the Olympia oyster restoration in
Netarts Bay along with subsequent impacts of the restoration on eelgrass (“Zostera marina”), an important estuarine species.
Two brood years (2005 & 2006) of cultch, consisting of O. conchaphila set on clean “Crassostrea gigas” shell substrate, were outplanted within an extensive, relatively uniform eelgrass bed. Cultch was placed in two experimental locations to determine the effect of cultch cover on native oyster survival, growth, and eelgrass abundance. The percent cover of cultch varied among treatments: “control” (no cultch), “low” (4% cultch cover), “medium” (11% cultch), and “high” (19% cultch). Research objectives were: (1) determination of O. conchaphila density, growth, and reproduction; and (2) quantification of the response of ”Z. marina” abundance and reproduction to cultch cover.
Results from 2007 demonstrated that Olympia oysters were capable of growth, reproduction, and recruitment within their former habitat. Cultch cover within treatments did not change throughout the summer and there was minimal shell export out of the experimental location. Oyster size increased from March‐September, 2007: the mean size of the 2005 brood year increased by 10.5 mm, while the 2006 brood year increased by 16.2 mm. Sperm and larvae were found in individuals from both brood years, indicating that oysters were reproductively active. Declines in eelgrass mean percent leaf cover and shoot density were observed with increasing cultch cover. The mean eelgrass percent leaf cover was 15‐22% lower and shoot density was 27‐36% lower in high treatment (19% cultch) plots than in control plots. There were no discernable patterns in the eelgrass response variables of flowering shoot count, blade length, or blade width. The medium treatment (11% cultch), in which oyster densities were statistically similar to the high treatment (19% cultch), did not have statistically significant impacts on eelgrass percent cover or shoot density. We recommend continued testing of the medium treatment (11% cultch), as well as other cultch densities, such as a 50% cultch treatment. Additional monitoring will be needed to determine what, if any, long‐term impacts occur to the eelgrass bed. We also recommend long‐term monitoring of both oysters and eelgrass beds to detect any additional changes at the re‐establishment site.
Advisors/Committee Members: Miller, Jessica (advisor), D'Andrea, Anthony (committee member).
Subjects/Keywords: Ostrea conchaphila; Olympia oyster – Reintroduction – Oregon – Netarts Bay
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APA (6th Edition):
Archer, P. E. (2008). Re‐establishment of the native oyster, Ostrea conchaphila, in Netarts Bay, Oregon, USA. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/9542
Chicago Manual of Style (16th Edition):
Archer, Pamela Emily. “Re‐establishment of the native oyster, Ostrea conchaphila, in Netarts Bay, Oregon, USA.” 2008. Masters Thesis, Oregon State University. Accessed January 22, 2021.
http://hdl.handle.net/1957/9542.
MLA Handbook (7th Edition):
Archer, Pamela Emily. “Re‐establishment of the native oyster, Ostrea conchaphila, in Netarts Bay, Oregon, USA.” 2008. Web. 22 Jan 2021.
Vancouver:
Archer PE. Re‐establishment of the native oyster, Ostrea conchaphila, in Netarts Bay, Oregon, USA. [Internet] [Masters thesis]. Oregon State University; 2008. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1957/9542.
Council of Science Editors:
Archer PE. Re‐establishment of the native oyster, Ostrea conchaphila, in Netarts Bay, Oregon, USA. [Masters Thesis]. Oregon State University; 2008. Available from: http://hdl.handle.net/1957/9542
University of Alberta
2.
Hodgson, Cheryl A.
Sedimentology and Neoichnology of a Wave-Dominated,
Tidally-Influenced, Fully Marine Bay, Oregon, USA.
Degree: MS, Department of Earth and Atmospheric
Sciences, 2013, University of Alberta
URL: https://era.library.ualberta.ca/files/fx719m63q
► In the field of ichnology it is understood that modern process ichnological observations of biogenically generated structures, in response to various physicochemical parameters, have substantial…
(more)
▼ In the field of ichnology it is understood that modern
process ichnological observations of biogenically generated
structures, in response to various physicochemical parameters, have
substantial applicability to deciphering trace fossil assemblages
observed in the rock record. Previous research has described
various animal-sediment distributions within a fully marine realm.
However, limited modern studies have directly assessed trace
genesis in high energy, constantly shifting sandy substrates or the
paleoecology of firmgrounds in a fully marine bay. In this thesis
the effects of hydraulic energy, sediment erosion, sediment
deposition, substrate firmness, and overall paleoecological aspects
of various substrate types on macrofaunal burrowing behaviour and
resultant trace distributions were assessed. This was achieved
through detailed sedimentological and neoichnological observations
conducted along transect locations within Netarts Bay, Oregon. The
knowledge gained through this study strengthens ichnofacies models
and offers new insight into trace distributions within shallow,
fully marine environments.
Subjects/Keywords: Netarts Bay; Glossifungites Ichnofacies; Sedimentology; Neoichnology; Teredolites Ichnofacies; Process Ichnology
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APA (6th Edition):
Hodgson, C. A. (2013). Sedimentology and Neoichnology of a Wave-Dominated,
Tidally-Influenced, Fully Marine Bay, Oregon, USA. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/fx719m63q
Chicago Manual of Style (16th Edition):
Hodgson, Cheryl A. “Sedimentology and Neoichnology of a Wave-Dominated,
Tidally-Influenced, Fully Marine Bay, Oregon, USA.” 2013. Masters Thesis, University of Alberta. Accessed January 22, 2021.
https://era.library.ualberta.ca/files/fx719m63q.
MLA Handbook (7th Edition):
Hodgson, Cheryl A. “Sedimentology and Neoichnology of a Wave-Dominated,
Tidally-Influenced, Fully Marine Bay, Oregon, USA.” 2013. Web. 22 Jan 2021.
Vancouver:
Hodgson CA. Sedimentology and Neoichnology of a Wave-Dominated,
Tidally-Influenced, Fully Marine Bay, Oregon, USA. [Internet] [Masters thesis]. University of Alberta; 2013. [cited 2021 Jan 22].
Available from: https://era.library.ualberta.ca/files/fx719m63q.
Council of Science Editors:
Hodgson CA. Sedimentology and Neoichnology of a Wave-Dominated,
Tidally-Influenced, Fully Marine Bay, Oregon, USA. [Masters Thesis]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/fx719m63q
Oregon State University
3.
Kentula, Mary E.
Production dynamics of a Zostera marina L. bed in Netarts Bay, Oregon.
Degree: PhD, Botany and Plant Pathology, 1982, Oregon State University
URL: http://hdl.handle.net/1957/26996
Subjects/Keywords: Zostera marina – Oregon – Netarts Bay
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APA (6th Edition):
Kentula, M. E. (1982). Production dynamics of a Zostera marina L. bed in Netarts Bay, Oregon. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/26996
Chicago Manual of Style (16th Edition):
Kentula, Mary E. “Production dynamics of a Zostera marina L. bed in Netarts Bay, Oregon.” 1982. Doctoral Dissertation, Oregon State University. Accessed January 22, 2021.
http://hdl.handle.net/1957/26996.
MLA Handbook (7th Edition):
Kentula, Mary E. “Production dynamics of a Zostera marina L. bed in Netarts Bay, Oregon.” 1982. Web. 22 Jan 2021.
Vancouver:
Kentula ME. Production dynamics of a Zostera marina L. bed in Netarts Bay, Oregon. [Internet] [Doctoral dissertation]. Oregon State University; 1982. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1957/26996.
Council of Science Editors:
Kentula ME. Production dynamics of a Zostera marina L. bed in Netarts Bay, Oregon. [Doctoral Dissertation]. Oregon State University; 1982. Available from: http://hdl.handle.net/1957/26996
Oregon State University
4.
Smith, Stephanie Rae.
Seagrasses as Potential Chemical Refugia for Acidification-Sensitive Bivalves.
Degree: MS, Marine Resource Management, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59519
► As the effect of ocean acidification (OA) on marine calcifiers is better understood, a range of potential mitigative strategies have been proposed, many of which…
(more)
▼ As the effect of ocean acidification (OA) on marine calcifiers is better understood, a range of potential mitigative strategies have been proposed, many of which are plagued by concerns of scale and feasibility. One oft-cited option is to increase the biomass of photosynthetic organisms to remove CO₂ from the water column and facilitate organic carbon burial. Seagrasses show much promise in this regard, owing to their highly refractive tissue. Timescales of carbon burial with respect to this strategy are on the order of years to decades. Recent studies, however, demonstrate that some marine bivalves experience short windows of heightened sensitivity to OA, especially during the early larval and early post-metamorphic “juvenile” stages, which occur on timescales of hours to days. In coastal areas, carbonate chemistry is highly variable on similar timescales, due in part to photosynthetic cycles, the pattern and magnitude of which will vary due to the ecological make-up of the habitat. Therefore, we must consider the highly complex and variable nature of CO₂ dynamics in seagrass habitats on short timescales when we consider their potential role in OA mitigation.
We examined patterns of growth and survival in the juvenile Pacific Oyster (Crassostrea gigas) outplanted within and outside beds of two different species of seagrass, the native Zostera marina and the non-native Z. japonica, in
Netarts Bay, Oregon. Z. marina and Z. japonica differ in the timing and magnitude of their growth and decay cycles and allocation of biomass above or below ground. Z. marina increased both growth and survival of C. gigas spat with the magnitude of the effects decreasing after
mid-season as seagrass growth slows and there is a transition to an upwelling-dominant hydrodynamic regime. Z. japonica appeared to have a slightly negative, but not statistically significant, effect on juvenile C. gigas growth, compared to the associated bare-sand control site, with the notable exception of a reversal of the trend in June, co-incident with this seagrass’s short period of growth. We have compared bivalve success metrics (growth and survival) with P[subscript CO2] measurements within each habitat. Patterns in bivalve success metrics appear to inversely correlate with trends in daily CO₂ minima over the course of the season, suggesting that bivalve success may be attributed to compensatory growth during daily low-CO₂ periods associated with the seagrass’s respective growing seasons.
Advisors/Committee Members: Waldbusser, George (advisor), Hales, Burke (committee member).
Subjects/Keywords: Acidification; Pacific oyster – Effect of water acidification on – Oregon – Netarts Bay
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APA (6th Edition):
Smith, S. R. (2016). Seagrasses as Potential Chemical Refugia for Acidification-Sensitive Bivalves. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59519
Chicago Manual of Style (16th Edition):
Smith, Stephanie Rae. “Seagrasses as Potential Chemical Refugia for Acidification-Sensitive Bivalves.” 2016. Masters Thesis, Oregon State University. Accessed January 22, 2021.
http://hdl.handle.net/1957/59519.
MLA Handbook (7th Edition):
Smith, Stephanie Rae. “Seagrasses as Potential Chemical Refugia for Acidification-Sensitive Bivalves.” 2016. Web. 22 Jan 2021.
Vancouver:
Smith SR. Seagrasses as Potential Chemical Refugia for Acidification-Sensitive Bivalves. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1957/59519.
Council of Science Editors:
Smith SR. Seagrasses as Potential Chemical Refugia for Acidification-Sensitive Bivalves. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59519
Oregon State University
5.
Whiting, Mark Carlos.
Distributional patterns and taxonomic structure of diatom assemblages in Netarts Bay, Oregon.
Degree: PhD, Botany and Plant Pathology, 1983, Oregon State University
URL: http://hdl.handle.net/1957/7999
► Epiphytic, planktonic and benthic diatom assemblages were investigated in Netarts Bay, Oregon. Samples were collected for a one-year period from February 1980 to March 1981.…
(more)
▼ Epiphytic, planktonic and benthic diatom assemblages were investigated in
Netarts Bay, Oregon. Samples were collected for a
one-year period from February 1980 to March 1981. A planktonic flora was observed only during periods of offshore enrichment when marine neritic species were abundant and were transported into the
bay by tidal currents. Multivariate analyses demonstrated that epiphytic and benthic assemblages were distinct, with relatively little overlap
in distribution of dominant taxa. The dynamics of the epiphyte assemblage were seasonal in nature, presumably related to the growth dynamics of the host plant Zostera marina) as well as to seasonal changes in the physical environment. Intertidal exposure gradients exerted little influence on the distribution of dominant epiphyte taxa. In contrast to the epiphytic flora, dominant benthic taxa demonstrated little seasonal variation in relative abundance. The effects of intertidal exposure gradients on benthic diatoms were dependent on interactions with different sediment types. Benthic taxa in silty sediments were virtually unaffected by intertidal gradients while many taxa in sandy sediments had marked intertidal preferences. Most of the variation in the distribution and relative abundances of benthic taxa could be explained by the physical properties of the sediment, especially mean particle diameter,
sediment organic content, and the degree of sediment sorting.
Advisors/Committee Members: McIntire, David (advisor), Willis, David (committee member).
Subjects/Keywords: Diatoms – Oregon – Netarts Bay
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APA (6th Edition):
Whiting, M. C. (1983). Distributional patterns and taxonomic structure of diatom assemblages in Netarts Bay, Oregon. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/7999
Chicago Manual of Style (16th Edition):
Whiting, Mark Carlos. “Distributional patterns and taxonomic structure of diatom assemblages in Netarts Bay, Oregon.” 1983. Doctoral Dissertation, Oregon State University. Accessed January 22, 2021.
http://hdl.handle.net/1957/7999.
MLA Handbook (7th Edition):
Whiting, Mark Carlos. “Distributional patterns and taxonomic structure of diatom assemblages in Netarts Bay, Oregon.” 1983. Web. 22 Jan 2021.
Vancouver:
Whiting MC. Distributional patterns and taxonomic structure of diatom assemblages in Netarts Bay, Oregon. [Internet] [Doctoral dissertation]. Oregon State University; 1983. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1957/7999.
Council of Science Editors:
Whiting MC. Distributional patterns and taxonomic structure of diatom assemblages in Netarts Bay, Oregon. [Doctoral Dissertation]. Oregon State University; 1983. Available from: http://hdl.handle.net/1957/7999
Oregon State University
6.
Hunger, Arthur Adelbert.
Distribution of foraminifera, Netarts Bay, Oregon.
Degree: MS, Oceanography, 1966, Oregon State University
URL: http://hdl.handle.net/1957/8866
► Netarts Bay is a coastal lagoon on the northern Oregon coast. Four major sedimentary environments are recognized including channel, sand flats, mud flats, and marsh.…
(more)
▼ Netarts Bay is a coastal lagoon on the northern Oregon coast. Four major sedimentary environments are recognized including channel, sand flats, mud flats, and marsh. Fine-grained sediment is carried in by streams and deposited in the marshes and mud flats. Fine sand for the channel and sand flats is derived from the open ocean beaches and turbulent zone. Organic carbon varies from 0.1 to 3.5 percent of the sediment and varies inversely with the sediment size. Carbonate carbon is unimportant. Fifty-one benthic foraminiferal species were recognized of which 37 formed two percent of the population in one or more samples. Four foraminiferal faunal groups were recognized: the Elphidiella Fauna inhabiting the channel, the Elphidium Fauna reaching greatest
abundance on the central bay sand flats, the Ammonia Fauna inhabiting the mud flats and inner bay sand flats, and the Miliammina Fauna characterizing the marsh. Planktonic foraminiferal populations form less than one
percent of the total foraminiferal population. Benthic foraminiferal populations on the order of 80 specimens /cm2 for the live populations and 200/cm3 for the dead are found in the dense vegetation of the marsh. Tidal flat populations are approximately an order of magnitude smaller and the channel population is one to two orders of magnitude
smaller than for the tidal flat. Species diversity is greatest on the central bay tidal flats, averaging seven species per sample for live and 15 for dead populations.
Values decrease as mud flats, marsh, and channel environments are approached. The total standing crop and most species inhabiting the innermost part of the bay display simultaneous bimodal population maxima in July and January. These peaks are possibly controlled by the availability of food. Ammonia cf. A. beccarii tepida and Elphidium incertum incertum show strong but independent population maxima in July and October respectively. Foraminifera-ostracod ratios range from 0. 6 to 41.5 with a mean of 13.8. Agglutinated-calcareous foraminiferal ratios vary inversely with sediment size and appear to be related to the pH of the sediments. Thecamoebians are rare in the bay but replace the foraminiferal population as fresh water environments are approached in the inflowing streams. Reworked fossil foraminifera are found only rarely.
Subjects/Keywords: Foraminifera – Oregon – Netarts Bay
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APA (6th Edition):
Hunger, A. A. (1966). Distribution of foraminifera, Netarts Bay, Oregon. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/8866
Chicago Manual of Style (16th Edition):
Hunger, Arthur Adelbert. “Distribution of foraminifera, Netarts Bay, Oregon.” 1966. Masters Thesis, Oregon State University. Accessed January 22, 2021.
http://hdl.handle.net/1957/8866.
MLA Handbook (7th Edition):
Hunger, Arthur Adelbert. “Distribution of foraminifera, Netarts Bay, Oregon.” 1966. Web. 22 Jan 2021.
Vancouver:
Hunger AA. Distribution of foraminifera, Netarts Bay, Oregon. [Internet] [Masters thesis]. Oregon State University; 1966. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1957/8866.
Council of Science Editors:
Hunger AA. Distribution of foraminifera, Netarts Bay, Oregon. [Masters Thesis]. Oregon State University; 1966. Available from: http://hdl.handle.net/1957/8866
Oregon State University
7.
Brunner, Elizabeth Lev.
Insights from stable isotope dynamics into the sensitivity of larval Pacific oysters to ocean acidification.
Degree: MS, Ocean, Earth and Atmospheric Sciences, 2013, Oregon State University
URL: http://hdl.handle.net/1957/44741
► Larvae of the Pacific Oyster, Crassostrea gigas, at Whiskey Creek Shellfish Hatchery (WCH) in Netarts Bay, Oregon, are negatively impacted by high-CO₂ water and exposure…
(more)
▼ Larvae of the Pacific Oyster, Crassostrea gigas, at Whiskey Creek Shellfish Hatchery (WCH) in
Netarts Bay, Oregon, are negatively impacted by high-CO₂ water and exposure during the initial shell formation period appears to be particularly damaging. To investigate the mechanism of this early susceptibility, several cohorts of larvae at WCH were monitored for stable isotope incorporation and biochemical composition: one in May 2011 and two in August 2011. The observations presented here focus on the isotopic shifts associated with initiation and rate of feeding, and the catabolism of C-rich (lipid) and N-rich (protein) pools. Persistent ontological patterns in bulk composition among the cohorts suggest that the creation of the initial shell is energetically expensive, and that the major energetic source during this period is maternally-derived egg lipids. The May cohort did not isotopically reflect their food source as rapidly as the August cohorts, indicating slower feeding, higher metabolic demand or lower maternal energy investments. All cohorts turned over organic carbon faster than organic nitrogen.
Shell carbon isotopes of all cohorts show a decreasing dependence on ambient dissolved inorganic carbon (DIC) carbon with time and subtle differences in this trend between the May and August cohorts are explored. Patterns in shell δ¹³C suggest greater exposure to ambient conditions during initial shell development, which could be an important process linking ambient carbonate chemistry and larval susceptibility. Scanning electron microscopy (SEM) images are used to document the initial shell formation. Kinetic isotope fractionation, dissolved organic matter (DOM) utilization, and the dissolvability of shell microstructures are also briefly considered in the context of larval susceptibility.
Advisors/Committee Members: Waldbusser, George G. (advisor), Hales, Burke (committee member).
Subjects/Keywords: Pacific oyster – Larvae – Effect of water quality on – Oregon – Netarts Bay
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APA (6th Edition):
Brunner, E. L. (2013). Insights from stable isotope dynamics into the sensitivity of larval Pacific oysters to ocean acidification. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/44741
Chicago Manual of Style (16th Edition):
Brunner, Elizabeth Lev. “Insights from stable isotope dynamics into the sensitivity of larval Pacific oysters to ocean acidification.” 2013. Masters Thesis, Oregon State University. Accessed January 22, 2021.
http://hdl.handle.net/1957/44741.
MLA Handbook (7th Edition):
Brunner, Elizabeth Lev. “Insights from stable isotope dynamics into the sensitivity of larval Pacific oysters to ocean acidification.” 2013. Web. 22 Jan 2021.
Vancouver:
Brunner EL. Insights from stable isotope dynamics into the sensitivity of larval Pacific oysters to ocean acidification. [Internet] [Masters thesis]. Oregon State University; 2013. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1957/44741.
Council of Science Editors:
Brunner EL. Insights from stable isotope dynamics into the sensitivity of larval Pacific oysters to ocean acidification. [Masters Thesis]. Oregon State University; 2013. Available from: http://hdl.handle.net/1957/44741
Oregon State University
8.
Motley, Jennifer.
Local and Regional Patterns in Eelgrass (Zostera marina L.) Communities Along an Upwelling-Productivity Gradient in Oregon Estuaries, USA.
Degree: MS, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61713
► In this thesis, I investigate the organization of eelgrass (Zostera marina L.) and mesograzer communities across local and regional scales in three upwelling- influenced estuaries…
(more)
▼ In this thesis, I investigate the organization of eelgrass (Zostera marina L.) and mesograzer communities across local and regional scales in three upwelling- influenced estuaries located along the Oregon coast, USA. Eelgrass ecosystems are an important source of primary production in estuarine systems, providing numerous ecosystem services, including nursery habitat for commercial fish, water quality improvement, and sediment stabilization. Community structure in eelgrass systems, i.e., the diversity, abundance, and composition of primary and secondary consumers, is influenced by a combination of local to regional scale variability in environmental and biotic factors. Thus, an important consideration in the management of these systems is to understand the organization of community structure across spatiotemporal scale and the implications for top-down (consumer) versus bottom-up (resource) control. In upwelling-influenced estuaries of the Pacific Northwest coast of the United States, eelgrass systems are exposed to latitudinal variability in oceanographic inputs, but the degree to which these regional effects versus local effects organize eelgrass community structure is poorly understood. Here I investigate
the relationship between primary producers (eelgrass, ulvoid macroalgae, and epiphytes), epifauna mesograzers, and fish predators within and across three estuaries located on the Oregon Coast, USA (
Netarts Bay, Yaquina
Bay, and Coos
Bay). Specifically, I asked: 1) What is the relative importance of local (within estuary) versus regional (across estuaries) scale patterns to eelgrass community structure (i.e., primary producers, epifaunal mesograzers, and fishes) in upwelling-influenced estuaries in Oregon?, 2) What is the potential role of regional oceanography versus trophic interactions in regulating eelgrass community structure, and is this dependent on spatial scale?, and 3) What are the management implications for eelgrass communities when regional and local scales are considered?
I found that while local effects were important, regional (estuary) scale patterns strongly influenced community structure in eelgrass communities, providing support that regional oceanographic bottom-up forcing dominates eelgrass communities. Additionally, I found evidence for top-down control by the opisthobranch Phyllaplysia taylori on primary producers at one site within
Netarts Bay. I suggest that eelgrass beds in these estuaries are mostly bottom-up systems, and further investigations should focus on quantifying the mechanistic relationship between mesograzers and primary producers at local to regional scales.
Advisors/Committee Members: Tomas Nash, Fiona (advisor), Dewitt, Ted (committee member).
Subjects/Keywords: seagrass; ulvoid macroalgae; epiphytes; epifaunal mesograzer; fish; trophic cascade; top-down; bottom-up; context-dependent; Phyllaplysia taylori; California Current System; Netarts Bay; Yaquina Bay; Coos Bay; Oregon; Pacific Northwest coast
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APA (6th Edition):
Motley, J. (2017). Local and Regional Patterns in Eelgrass (Zostera marina L.) Communities Along an Upwelling-Productivity Gradient in Oregon Estuaries, USA. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61713
Chicago Manual of Style (16th Edition):
Motley, Jennifer. “Local and Regional Patterns in Eelgrass (Zostera marina L.) Communities Along an Upwelling-Productivity Gradient in Oregon Estuaries, USA.” 2017. Masters Thesis, Oregon State University. Accessed January 22, 2021.
http://hdl.handle.net/1957/61713.
MLA Handbook (7th Edition):
Motley, Jennifer. “Local and Regional Patterns in Eelgrass (Zostera marina L.) Communities Along an Upwelling-Productivity Gradient in Oregon Estuaries, USA.” 2017. Web. 22 Jan 2021.
Vancouver:
Motley J. Local and Regional Patterns in Eelgrass (Zostera marina L.) Communities Along an Upwelling-Productivity Gradient in Oregon Estuaries, USA. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1957/61713.
Council of Science Editors:
Motley J. Local and Regional Patterns in Eelgrass (Zostera marina L.) Communities Along an Upwelling-Productivity Gradient in Oregon Estuaries, USA. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61713
Portland State University
9.
Kunert, Charles Jerome.
A taxonomic study of the marine algae of Netarts Bay, Oregon.
Degree: MS(M.S.) in Biology, Biology, 1972, Portland State University
URL: https://pdxscholar.library.pdx.edu/open_access_etds/969
► Gathering taxonomic data is fundamental to any biological or ecological research. It was the intent of this paper to increase the storehouse of taxonomic…
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▼ Gathering taxonomic data is fundamental to any biological or ecological research. It was the intent of this paper to increase the storehouse of taxonomic information by studying the marine algae of one section of the Oregon coastline. Netarts Bay was chosen because of its accessibility and generally primitive nature. It is in an area of Oregon largely untouched by phycologists and so offered an opportunity for original research.
Techniques of collecting and preserving specimens were kept as simple as possible, thus allowing a proportionately greater amount of the available time to be spent in the classification of the organisms. The body of this paper is, therefore, an annotated list of the algae collected and identified. A total of 78 species were identified, the majority belonging to the division Rhodophta (45 of the 78). An effort was made in collecting to be as thorough as possible. Algae ranging in habitat all the way from the spray zone to the depths of Netarts Bay were included. However, while the collection is comprehensive, because of the great size of the Bay it is undoubtedly incomplete. Only further research can identify which algae have been overlooked or omitted.
Photographs are in evidence throughout much of the text. It is hoped that they will illustrate some of the forms which might be found only in this region and also, as accurately as possible, to aid in the identification of species elsewhere.
Subjects/Keywords: Marine algae – Oregon – Netarts Bay; Botany; Marine Biology; Plant Biology
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APA (6th Edition):
Kunert, C. J. (1972). A taxonomic study of the marine algae of Netarts Bay, Oregon. (Masters Thesis). Portland State University. Retrieved from https://pdxscholar.library.pdx.edu/open_access_etds/969
Chicago Manual of Style (16th Edition):
Kunert, Charles Jerome. “A taxonomic study of the marine algae of Netarts Bay, Oregon.” 1972. Masters Thesis, Portland State University. Accessed January 22, 2021.
https://pdxscholar.library.pdx.edu/open_access_etds/969.
MLA Handbook (7th Edition):
Kunert, Charles Jerome. “A taxonomic study of the marine algae of Netarts Bay, Oregon.” 1972. Web. 22 Jan 2021.
Vancouver:
Kunert CJ. A taxonomic study of the marine algae of Netarts Bay, Oregon. [Internet] [Masters thesis]. Portland State University; 1972. [cited 2021 Jan 22].
Available from: https://pdxscholar.library.pdx.edu/open_access_etds/969.
Council of Science Editors:
Kunert CJ. A taxonomic study of the marine algae of Netarts Bay, Oregon. [Masters Thesis]. Portland State University; 1972. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/969
Portland State University
10.
McCallum, Larry D.
Netarts Bay, Oregon: an assessment of human impact on an estuarine system.
Degree: MS(M.S.) in Geography, Geography, 1977, Portland State University
URL: https://pdxscholar.library.pdx.edu/open_access_etds/2550
► Problems associated with planning the future use of estuarine areas stem from: <ol> A lack of knowledge on the critical aspects of the system.…
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▼ Problems associated with planning the future use of estuarine areas stem from:
<ol>
A lack of knowledge on the critical aspects of the system.
Inability to predict the future changes which will occur within the system in order to effectively manage the resource base.
</ol>
These difficulties lie in the fact that changes within the system occur because of both "natural" and "cultural" conditions. The thesis hypothesis and subsequent research is to describe the physical changes that have occurred within the
Netarts system, primarily due to man's impact.
Types of data gathered for the analysis includes that on historical and current land use activities, current research findings on system characteristics, and independent research on shoreline changes and vegetation composition. Much of the historical data were taken from early manuscripts and publications. Current research data were obtained from several engineering studies of the
bay, as well as a baseline study of
Netarts funded by a grant from the National Science Foundation and Oregon State University. This study included an inventory of man's utilization of the resource base. Methods utilized in data analysis included aerial photo-interpretation, planimetric measurement of shoreline and vegetative alterations, and on-site inventory of current shoreline and vegetation changes.
Results of the research have shown that it is possible to measure and describe changes within the
Netarts Bay system. Specific findings include:
<ol>
A decrease in sandspit volume of nine percent between 1942 and 1974 due to construction of a boat basin and fill.
Occurrence of marsh progradation in all marsh areas with sedge and low sand type showing the greatest increases between 1939-1962.
A decrease in rate of marsh progradation from 1962-1974.
A total decrease in tidal prism of the
bay between 1957-1969 as measured by cross sectional areas. The rate of decrease is occurring at a faster rate south of the mouth of Whiskey Creek.
Destruction of Chum salmon fisheries and native oyster populations due to over-harvesting and siltation.
Destruction of Gaper clam beds along the eastern shore of the
bay and increased erosion of the shore, due to road fill and road construction.
</ol>
The results of the research and subsequent findings show that it is possible to describe an estuary as a "system" that has applicability for future development of a land and water use model for an estuary.
Advisors/Committee Members: John O. Dart.
Subjects/Keywords: Nature – Effect of human beings on – Oregon – Netarts Bay; Nature – Effect of human beings on; Oregon – Netarts Bay; Human Geography; Physical and Environmental Geography
Record Details
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Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
McCallum, L. D. (1977). Netarts Bay, Oregon: an assessment of human impact on an estuarine system. (Masters Thesis). Portland State University. Retrieved from https://pdxscholar.library.pdx.edu/open_access_etds/2550
Chicago Manual of Style (16th Edition):
McCallum, Larry D. “Netarts Bay, Oregon: an assessment of human impact on an estuarine system.” 1977. Masters Thesis, Portland State University. Accessed January 22, 2021.
https://pdxscholar.library.pdx.edu/open_access_etds/2550.
MLA Handbook (7th Edition):
McCallum, Larry D. “Netarts Bay, Oregon: an assessment of human impact on an estuarine system.” 1977. Web. 22 Jan 2021.
Vancouver:
McCallum LD. Netarts Bay, Oregon: an assessment of human impact on an estuarine system. [Internet] [Masters thesis]. Portland State University; 1977. [cited 2021 Jan 22].
Available from: https://pdxscholar.library.pdx.edu/open_access_etds/2550.
Council of Science Editors:
McCallum LD. Netarts Bay, Oregon: an assessment of human impact on an estuarine system. [Masters Thesis]. Portland State University; 1977. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/2550
. 
Open Access Theses and Dissertations