Recent and fossil phytoplankton pigments in Lake Baikal as markers for community structure and environmental changes
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English)
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Spatial differences in dissolved silicon utilization in Lake Baikal, Siberia: Examining the impact of high diatom biomass events and eutrophication
Recent research has highlighted how Lake Baikal, Siberia, has responded to the direct and indirect effects of climate change (e.g., ice-cover duration), nutrient loading, and pollution, manifesting as changes in phytoplankton/zooplankton populations, community structure, and seasonal succession. Here, we combine and compare analyses of chlorophyll a (an estimate of total algal biomass), caroten...
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Both surface water temperatures and the intensity of thermal stratification have increased recently in large lakes throughout the world. Such physical changes can be accompanied by shifts in plankton community structure, including changes in relative abundances and depth distributions. Here we analyzed 45 years of data from Lake Baikal, the world's oldest, deepest, and most voluminous lake, to ...
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Siliceous microfossil succession was analyzed in a 200,000-yr sediment sequence recovered from the Buguldeika Saddle in Lake Baikal, Russia. Siliceous microfossil abundance varied among core depths from no preserved microfossils during inferred colder climate conditions to recent interglacial sediments containing over 300 3 106 microfossils per g dry sediment. Depth-age microfossil assemblage z...
متن کاملSeasonal Dynamics of Common Phytoplankton in Lake Baikal
Changes in the seasonal dynamics of phytoplankton are potentially important, because they can generate a mismatch between the timing of peak productivity and that of consumers, thereby interrupting energy flow between trophic levels. Here, we use a long term data set for the phytoplankton community in the southern basin of Lake Baikal, Siberia to analyse for changes in the seasonal timing of pe...
متن کاملResting stages and ecology of the planktonic diatom Aulacoseira skvortzowii in Lake Baikal
Populations of the planktonic diatom Aulacoseira skvortzowii in Lake Baikal developed below 4uC, with mortality increasing rapidly at temperatures above 6.5uC. Resting spores were produced before the temperature rise associated with summer stratification. The main cue for sporulation was a decline in phosphate concentration below 15–20 mg L21 P-PO4. If phosphate declined after the onset of stra...
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تاریخ انتشار 2005