Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"freshwater phytoplankton"”.
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The Effects of Diesel Fuel on the Growth of Selected Freshwater Phytoplankton
… components of diesel fuel on selected species of freshwater algae. The effects of bacterial degradation products of the diesel fuel were also tested. Results of the investigation indicate that under specific culture conditions two of the algae, Chlamydomonas and Scenedesmus, appeared enhanced by …
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Diatoms of the genus thalassiosira from the tidal San Joaquin River, Stockton CA, USA
… genus Thalassiosira Cleve, were observed in freshwater phytoplankton samples collected from a fifty-two kilometer reach of the San Joaquin River in the vicinity of Stockton, California, USA. The study was conducted between the South Airport Way bridge near Vernalis and the Stockton Deep Water …
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Prediction of temporal and spatial phytoplankton change in Rutland Water
Work on the temporal and spatial variation of freshwater phytoplankton in Rutland Water, Leicestershire, is reported. The species succession was found to be similar to other eutrophic lakes although total annual biomass appeared to be suppressed as a result of the destratification equipment which …
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Phytoplankton Dynamics in the Very Low Salinity Region of the James River Estuary, Virginia, U.S.A.
… There was a peak phytoplankton biomass in the very low salinity region (defined as the location where surface salinity measured less than 0.5$ 0/00) and this peak represented five to ten times greater biomass than adjacent waters. The peak biomass occurred …
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Predicting phytoplankton community dynamics: understanding water quality responses to global change
… due to global change. In particular, many freshwater phytoplankton communities are experiencing multiple global change stressors, altering phytoplankton community composition, biomass, and spatial distribution. I used multiple approaches to characterize the interactions between spatial …
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Climate impact on phytoplankton blooms in shallow lakes
… to a better understanding of climate impacts on freshwater phytoplankton, which forms the basis of the food chain and decisively influences water quality. The analyses were, for the most part, based on a long-term data set of physical, chemical and biological variables of a shallow, polymictic …
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The effect of the cyanobacterial toxin saxitoxin on neurodevelopment
… shellfish toxins, produced by both marine and freshwater phytoplankton. This group of toxins act by blocking the voltage-gated sodium channels, halting the inflow of sodium ions and the subsequent generation of action potentials. While acute exposure has been well researched, with safety …
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Spatial and Temporal Patterns of Areal and Volumetric Phytoplankton Productivity of Lake Texoma
Phytoplankton productivity of Lake Texoma was measured for one year from August 1999 to August 2000 for four stations, using the oxygen change method and laboratory incubation. Mean values of the photosynthetic parameters, PBmax and alphaB ranged from 4.86 to 46.39 mg O2.mg Chl-1.hr-1 for PBmax and …