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.
Results
Showing 1 to 20 of 237 for “"plankton"”.
-
Models of plankton biomass spectra
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
-
Some nonlinear problems in plankton ecology
… variables and environmental forcings in the plankton. The approach is theoretical: I use simple models to identify conditions leading to such a mismatch. The models are motivated by planktonic systems and focus on one ubiquitous nonlinear ecological interaction, that between a consumer and a …
-
Some nonlinear problems in plankton ecology
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1995.
-
Plankton studies of the Tomales Bay, California
<p>These studies on the plankton of Tomales Bay were designed to determine the effects of such physical factors as tides, temperatures, salinities and sunshine on the quantities of various types of organisms, and to obtain a more comprehensive picture of estuarine life at the Pacific Marine …
-
Application of synchronisation theory to plankton patchiness
… dynamics approach to modelling a distribution of plankton by representing a region of ocean as an ensemble of plankton populations interacting through the stirring and mixing effects of the flow. The methods of synchronisation theory are applied within this framework to gain insight into emergent …
-
The role of heterotrophic microflagellates in plankton communities
… of these protozoa as a trophic link between planktonic bacteria and zooplankton. The abundance of microflagellates relative to other picoplankton (0.2-2.0 μm) and nanoplankton (2-20 μm) populations in water samples in the North Atlantic and in Lake Ontario and on macroaggregates in the North …
-
Keanekaragaman plankton sebagai bioindikator kualitas air sungai Brantas
Indonesia: Plankton merupakan organisme perairan yang keberadaannya dapat dijadikan sebagai indikator perubahan kualitas biologi perairan sungai. Plankton yang mempunyai sifat selalu bergerak dapat juga dijadikan indikator pencemaran perairan. Akhir-akhir ini pemantauan dengan biota lebih …
-
Applied Plankton Image Classification for Imaging FlowCytobot Data
… cytometer, produces high resolution images of plankton at rates up to 10 Hz for months or years, resulting in billions of images. This project compares various methods to categorize incoming images of plankton gathered by the IFCB - Convolutional Neural Nets (CNNs), Vision Transformers (ViT), …
-
Application of statistical learning theory to plankton image analysis
… to quickly identify and map distributions of plankton. This thesis addresses the problem by applying statistical machine learning to video images collected by an optical sampler, the Video Plankton Recorder (VPR). The research is focused on development of a real-time automatic plankton …
-
Accounting for unpredictable spatial variability in plankton ecosystem models
… to predict fine-scale spatial variability in plankton ecosystems can<br/>seriously compromise our ability to predict coarse-scale behaviour. Spatial variability which<br/>is deterministically unpredictable may distort parameter estimates when the ecosystem model<br/>is fitted to (or …
-
Application of statistical learning theory to plankton image analysis
… to quickly identify and map distributions of plankton. This thesis addresses the problem by applying statistical machine learning to video images collected by an optical sampler, the Video Plankton Recorder (VPR). The research is focused on development of a real-time automatic plankton …
-
The production of non-methane hydrocarbons by marine plankton
… source for many alkenes, and a phytoplanktonic source for isoprene. The focus of this thesis was to gain further insight on marine microbiological cycling of NMHC. This included investigations on two main themes. The first was the effect of different physiological conditions on …
-
Latitudinal variation in plankton size spectra along the Atlantic Ocean
… regulation of population density. In this way, plankton size has an important role in structuring the rates and pathways of material transfer in the marine pelagic food web, and consequently the oceanic carbon cycle. The transfer of energy between trophic levels can be inferred from regular …
-
Modeling Nutrient and Plankton Processes in the California Coastal Transition Zone
… spatial and temporal development of nutrient and plankton distributions in the CTZ. The first of these models considers only time- and vertical processes at specific locations in the CTZ. The model food web components include: silicate, nitrate, ammonium, two phytoplankton size fractions, …
-
Alkyl Polyglucoside Compound Influences Freshwater Plankton Community Structure in Floating Mesocosms
… primary producers (such as microalgae) and zooplankton. Zooplankton are also affected by APG, and species may demonstrate different sensitivities to APGs direct toxicity. Species not affected by direct toxicity may be affected by trophic interaction such as removal of a food source or changes …
-
A size-based model of carbon and nitrogen flows in plankton communities
… the dynamics of carbon and nitrogen flows in plankton communities. All parameters in the model are determined by body size using empirically-determined relationships calculated from published data. The model is robust with respect to most parameters and assumptions. Because the model is based …
-
Fatty Acids as Biomarkers of Plankton Trophic Structure in Table Rock Lake, Missouri
… I examined the fatty acid profiles of phytoplankton and zooplankton in the James River arm of Table Rock Lake, Missouri. During April, June, and August 2008, I collected phytoplankton and common zooplankton taxa from two depths (6 m and 12 m) at each of two sites on Table Rock Lake, …
-
Long-Term Warming And The Size And Phenology Of Long Island Sound Plankton
… stressors, the impact of climate change on planktonic communities can be difficult to detect. A time-series of monthly surface water temperatures in the Central Basin of Long Island Sound (LIS) from the late 1940s until 2012 indicates a warming rate of 0.03°C per year, with recent summer …
-
Plankton dynamics of the open Southern Ocean and surrounding the (Sub)Antarctic islands
… of global ocean CO2 absorption annually. Marine plankton play a major role in the Southern Ocean CO2 sink as they fix dissolved atmospheric CO2 into organic carbon biomass, much of which supports the ocean food web and a portion of which sinks into the ocean interior, thereby removing atmospheric …
Page 1 of 12