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Spatial variation in zooplankton size and taxonomic community structure along a 50°N to 50°S transect of the AtlanticWoodd-Walker, Rachel Sarah January 2000 (has links)
Zooplankton play a vital role in the world's oceans in terms of transport of carbon out of the surface layer and providing food for fish. Zooplankton are patchily distributed on all scales, and this has important consequences for both sampling and understanding their role in the ocean. The distribution of zooplankton on different scales forms the focus of this study. Three Atlantic Meridional Transect (AMT) cruises were carried out and data made available from three previous cruises. Zoo plankton data were collected using a combination of vertical nets and using an optical plankton counter (OPC) sampling from the pumped seawater supply. Validation of methods showed that the OPC data could reliably be converted to carbon and numerical abundance estimates for open ocean conditions. Spectral analysis suggested that surface zooplankton heterogeneity followed a power law relationship over several scales. Over the 30 to 1000 km range this was approximately -1, and for smaller and larger scales the slope was reduced. Chlorophyll was less patchy, following temperature and salinity over the same range with a slope of -1.8. Analysis of large scale heterogeneity showed clear latitudinal trends in diversity, particularly evident in the copepod genera, with low diversity at high latitudes. The size structure appeared to be more closely related to the productivity of the area, with high zooplankton biomass associated with larger zooplankton. Regions with similar copepod communities were identified. These were found to be similar to other pelagic regions, but less closely related to watermasses or production regimes. Multiple linear regression of surface zooplankton biomass showed a strong relationship with the physics (temperature and salinity), chlorophyll and the time of day, accounting for 55% of the variability. Use of the regression equations to predict new transects gave R²=0.34. Improvement could be made by dividing the transect into smaller regions. Neural networks gave enhanced predictability (R² = 0.77 for the training set, and R²= 0.47 for the novel set) with a simpler model, although similar variables were important. This study has shown that copepods show latitudinal gradient in diversity, associated with seasonality, and form regions of similarity that do not conform to biogeochemical provinces or the watermasses. Neural networks may be used to predict zooplankton abundance from a few readily available parameters.
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The determination and distribution of cobalt and nickel in tropical Pacific water / Cobalt and nickel in tropical Pacific waterForster, William Owen January 1966 (has links)
Typescript. / Thesis (Ph. D.)--University of Hawaii, 1966. / Bibliography: leaves [122]-127. / ix, 127 l illus., tables (1 fold)
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Interactions Between Sea Water and Coral Reefs in Kaneohe Bay, Oahu, HawaiiKlim, Donald G 01 June 1969 (has links)
TIlis study, covering a period of eight months, was undertaken
to determine if measurable changes in characteristics occur in sea water passing over a shallow coral reef. The parameters studied
include salinity, temperature, current velocities, dissolved oxygen,
pH, dissolved organic carbon and particulate organic and suspended
inorganic carbon. Staining and microscopic observations were made
to supplement the other data.
The results showed noticeable increases in oxygen, pH, particulate
organic and inorganic carbon abundance in the central portion
of the reef, which were attributed to the influence of extensive
growths of benthic algae found on the seaward edge. Dissolved
organic carbon concentration increased gradually across the reef,
and there is evidence that inorganic carbonate is being accumulated
on the leeward side of the reef. / Typescript. Bibliography: leaves [53]-55.
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Rotating convection and the oceanic general circulation /Pierce, David W., January 1993 (has links)
Thesis (Ph. D.)--University of Washington, 1993. / Vita. Includes bibliographical references (leaves [167]-169).
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Variable spatiale de la matière organique dissoute en fonction de la masse moléculaire nominale dans les eaux de la rivière Saguenay /Wang, Fenghai. January 1991 (has links)
Mémoire (M.Ress.Renouv.) -- Université du Québec à Chicoutimi, 1991. / Document électronique également accessible en format PDF. CaQCU
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Evaluating carbonate saturation effects on magnesium calcium core top calibration in benthic foraminiferaJordan, Katherine A. January 2008 (has links)
Thesis (M.S.)--Rutgers University, 2008. / "Graduate Program in Oceanography." Includes bibliographical references (p. 35-39).
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Response of inherent optical properties to stormwater runoff in Santa Monica Bay, CaliforniaRagan, Matthew August. January 2003 (has links)
Thesis (M. S.)--University of Southern California, 2003. / Includes bibliographical references (leaves 55-57).
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The influence of phytoplankton on ocean color spectraMueller, James L. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 1974. / "Portion of final report, U.S. Naval Oceanographic Office Contract Number N62306-70-0414". Bibliography : leaves 197-204.
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Contribution à l'étude conductimétrique de la composition ionique de l'eau de merPoisson, Alain. January 1970 (has links)
Thesis (Ph. D)--Université de Paris, Faculté des Sciences, 1970. / Includes bibliographical references (leaves [1-8] (at end)).
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Effects of cloud-radiative forcing on atmospheric response to tropical SST anomaly observation and simulation /Lu, Xiaodan. January 1996 (has links)
Thesis (Ph. D.)--State University of New York at Stony Brook, 1996. / Includes bibliographical references (leaves 125-134).
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