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You searched for subject:( tidal cycles). Showing records 1 – 3 of 3 total matches.

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NSYSU

1. Deng, Long-hui. Rapid turnover of carbon and nitrogen in silty intertidal sediment of the Yangtze River Estuary.

Degree: Master, Department of Oceanography, 2015, NSYSU

Intertidal sediment has been increasingly acknowledged as a biogeochemical hotspot for element cycling. However, the tide-driven dynamics of carbon and nitrogen in the expansive tidal flats of the Changjiang (Yangtze River) Estuary, the largest estuary of China, was barely addressed. This study investigated the short-term variations of carbon and nitrogen in the intertidal sediment of Dongtan by the use of multiple approaches including monitoring hydrodynamics of the tides and pore fluid flow, sequential sampling of estuarine waters and intertidal sediment, and parallel whole-core incubation experiments. During tidal inundation, intensive resuspension and interfacial exchange of matter down to 8â9 cm depth have been observed for the silty sediment. We estimated that at the onset of exposure, the sediment received an input of labile organic matter at least 240 mmol C mâ2, ~86% of which was deposited in the top layer. Biogeochemical processes, promoted by the slow but persistent vertical pore fluid flow that transported matter across the redox boundaries, exhibited an uneven temporal distribution over the course of exposure: reactions in the first one hour accounted for >61 % of NO3â removal and accumulation of biodegradation end products (dissolved inorganic carbon (DIC) and NH4+). These solutes were then replenished (NO3â) or flushed out (DIC, NH4+) in the next round of inundation. In contrast, the concentrations of dissolved organic carbon remained relatively stable over the tidal cycle, implying a dynamic equilibrium maintained by swift decomposition of particulate organic matter and remineralization into DIC. The daily rates of remineralization, NO3âremoval and NH4+ release were comparable to those reported for sandflats. A conceptual model was constructed to summarize the input, transformation, and export of carbon and nitrogen in the silty sediment within tidal cycles. Advisors/Committee Members: Jia-Jang Hung (chair), Yu-Shih Lin (chair), Pei-Ling Wang (chair), James T. Liu (chair), Yu-Shih Lin (committee member).

Subjects/Keywords: Tidal cycles; Short-term variations; Silty sediment; Nitrogen; Carbon

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Deng, L. (2015). Rapid turnover of carbon and nitrogen in silty intertidal sediment of the Yangtze River Estuary. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0223115-161249

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):

Deng, Long-hui. “Rapid turnover of carbon and nitrogen in silty intertidal sediment of the Yangtze River Estuary.” 2015. Thesis, NSYSU. Accessed February 29, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0223115-161249.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Deng, Long-hui. “Rapid turnover of carbon and nitrogen in silty intertidal sediment of the Yangtze River Estuary.” 2015. Web. 29 Feb 2020.

Vancouver:

Deng L. Rapid turnover of carbon and nitrogen in silty intertidal sediment of the Yangtze River Estuary. [Internet] [Thesis]. NSYSU; 2015. [cited 2020 Feb 29]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0223115-161249.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Deng L. Rapid turnover of carbon and nitrogen in silty intertidal sediment of the Yangtze River Estuary. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0223115-161249

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Weeks, Alison. Seasonal and tidal cycles of suspended particulates in the Irish Sea.

Degree: PhD, 1989, Bangor University

In spite of the widely perceived importance of suspended particulate material (SPM) , its distribution in the shelf seas and the processes controlling its variation are little known. This thesis reports an exploratory study of the spatial and time dependant variability of SPM in an area of the northern Irish Sea. SPM was determined both directly by gravimetric methods and via measurements of beam attenuation (c). Spatial distributions were determined from grid surveys using a profiling transmissometer. In addition a six month record of beam attenuation and current velocity was obtained from a site off the north coast of Anglesey. A clear spatial pattern in the surface distribution of c was observed which was similar to the distribution of h/ta, suggesting that concentrations of SPM are determined by the availability of TKE from tidal stirring. A strong seasonal cycle of c was observed in mixed water, with values decreasing in June, July and August which suggested a reduction in the supply of SPM during summer. In stratified water, high concentrations of SPM remained confined to the dense layer below the thermocline. The seasonal cycle was observed in the time series from the mooring, but in addition there was a marked response to tidal currents in the spring and in autumn. Close analysis of the record in April and May-showed signals at M% and M4frequencies. These variations in c were attributed to a local response to tidal currents causing erosion of the sea-bed and to the oscillation of a horizontal gradient in c in the region. A regression model was found to explain 35% of the variance in data from a5 week time series. 70% of the variance was explained for four day time series, near spring tides. The relationship between c and tidal flows was more marked at spring tides than at neaps.

Subjects/Keywords: 551.46; Tidal cycles in the Irish Sea

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Weeks, A. (1989). Seasonal and tidal cycles of suspended particulates in the Irish Sea. (Doctoral Dissertation). Bangor University. Retrieved from https://research.bangor.ac.uk/portal/en/theses/seasonal-and-tidal-cycles-of-suspended-particulates-in-the-irish-sea(230822f8-0829-4a3f-a385-1de3becd4792).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253310

Chicago Manual of Style (16th Edition):

Weeks, Alison. “Seasonal and tidal cycles of suspended particulates in the Irish Sea.” 1989. Doctoral Dissertation, Bangor University. Accessed February 29, 2020. https://research.bangor.ac.uk/portal/en/theses/seasonal-and-tidal-cycles-of-suspended-particulates-in-the-irish-sea(230822f8-0829-4a3f-a385-1de3becd4792).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253310.

MLA Handbook (7th Edition):

Weeks, Alison. “Seasonal and tidal cycles of suspended particulates in the Irish Sea.” 1989. Web. 29 Feb 2020.

Vancouver:

Weeks A. Seasonal and tidal cycles of suspended particulates in the Irish Sea. [Internet] [Doctoral dissertation]. Bangor University; 1989. [cited 2020 Feb 29]. Available from: https://research.bangor.ac.uk/portal/en/theses/seasonal-and-tidal-cycles-of-suspended-particulates-in-the-irish-sea(230822f8-0829-4a3f-a385-1de3becd4792).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253310.

Council of Science Editors:

Weeks A. Seasonal and tidal cycles of suspended particulates in the Irish Sea. [Doctoral Dissertation]. Bangor University; 1989. Available from: https://research.bangor.ac.uk/portal/en/theses/seasonal-and-tidal-cycles-of-suspended-particulates-in-the-irish-sea(230822f8-0829-4a3f-a385-1de3becd4792).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253310


University of Otago

3. Trilford, Danielle. Shell Microband Analysis as a Tool in New Zealand Archaeology .

Degree: University of Otago

Recent improvements in animal biology and microscopy now allow for finer-grained analyses of microstructures in archaeofaunal specimens than previously possible. Novel new applications of microscopy methods applied to in the intertidal New Zealand cockle (Austrovenus stutchburyi) species demonstrate a strong link between microbands and tidal and lunar cycles. The application of the technique has significant implications for high-precision seasonal and absolute dating in New Zealand archaeology. Applying the technique to a short-lived archaeological midden deposit from Wairau Bar demonstrates the time-of-death in archaeological samples can be calculated with much higher-precision than tools which are currently available in the temporal-dating suite. The method holds significant potential for sclerochronological, Bayseian applications in radiocarbon dating, and palaeoclimate analyses. Advisors/Committee Members: Walter, Richard (advisor).

Subjects/Keywords: Archaeology; New Zealand; Sclerochronology; Austrovenus stutchburyi; Biological rhythms; Seasonality; Palaeoseasonality; Dating; Wairau Bar; Settler population; Shellfishing; Microband analysis; SEM; Scanning Electron Microscopy; EDS; Cockle; Estuary; Resource use; tidal cycles; lunar cycles; Dating alternative; human settlement; maori resource use; shellfish; midden deposit; seasonal resource; malacology; electron dispersive spectroscopy; backscatter electron micoscopy; seasonal growth; summer growth; early new zealand hunting

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Trilford, D. (n.d.). Shell Microband Analysis as a Tool in New Zealand Archaeology . (Masters Thesis). University of Otago. Retrieved from http://hdl.handle.net/10523/5745

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Chicago Manual of Style (16th Edition):

Trilford, Danielle. “Shell Microband Analysis as a Tool in New Zealand Archaeology .” Masters Thesis, University of Otago. Accessed February 29, 2020. http://hdl.handle.net/10523/5745.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

MLA Handbook (7th Edition):

Trilford, Danielle. “Shell Microband Analysis as a Tool in New Zealand Archaeology .” Web. 29 Feb 2020.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Trilford D. Shell Microband Analysis as a Tool in New Zealand Archaeology . [Internet] [Masters thesis]. University of Otago; [cited 2020 Feb 29]. Available from: http://hdl.handle.net/10523/5745.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Council of Science Editors:

Trilford D. Shell Microband Analysis as a Tool in New Zealand Archaeology . [Masters Thesis]. University of Otago; Available from: http://hdl.handle.net/10523/5745

Note: this citation may be lacking information needed for this citation format:
No year of publication.

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