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 4 of 4 for “"Discostella stelligera"”.
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Trends in Sedimentary Diatom Assemblages Metal(loid) Concentrations Over the Last ~200 Years in Lake Temagami in Response to Multiple Environmental Stressors
… concentrations. Small centric diatoms, such as Discostella stelligera (Cleve & Grunow) and Cyclotella spp., are examined as indicators of thermal stratification and climate-driven changes in lake dynamics. Through the analysis of sedimentary diatom assemblages from three strategically selected …
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The Response of Discostella Species to Climate Change at the Experimental Lakes Area, Canada
… towards increased relative abundances of Discostella species, a phenomenon that has been documented across the Northern Hemisphere. One of the central tenants of this work is that it has been done at the Experimental Lakes Area (ELA) in the boreal region of Canada, a study site that is …
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Changes in Diatom Assemblages in Adirondack (NY, USA) Reference Lakes Since Pre-Industrial Times
… was used to represent pre-industrial conditions. Discostella stelligera, a planktonic diatom taxon, is presently the dominant species in 50% of the lakes, and showed the greatest change. D. stelligera increased by >10% in 11 of the 30 study lakes. The measured present-day chemical and physical …
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Diatomáceas com potencial indicador do estado trófico de dois reservatórios com diferentes padrões de trofia : Piraquara I e Iraí
… Frustulia crassinervia, Encyonema neogracile, Discostella stelligera e Navicula cryptotenella. No reservatório do Irai foram identificados 114 espécies perifíticas, destas 4 pioneiras para o estado. Achnanthidium minutissimum, Gomphonema gracile e Fragilaria rumpens foram as espécies que melhor …