نتایج جستجو برای: paleolimnology
تعداد نتایج: 78 فیلتر نتایج به سال:
With the growing understanding of human influence on the Earth system, an increasing number of scientific investigations focuses on vegetation responses to changing environmental and/ or climatic conditions. A detailed prediction, how e.g. increasing atmospheric temperatures affect the composition of terrestrial and aquatic vegetation composition, however, remains difficult without a detailed k...
Lacustrine sediment accumulation provides meaningful and diverse long-term records of environmental change. This overview highlights the usefulness of the paleolimnological approach in evaluating the magnitude and direction of human-induced environmental change in lakes and their catchments. Because of the services they provide, freshwater ecosystems have always been significantly affected by h...
The sediments of Yellowstone Lake may reveal the paleoecological history of this lake over the last few centuries. These sediments contain up to 60% biogenic silica derived from diatom frustules settling out from the overlying water. The sediment record reveals large variations in the diatom deposition over the last ~350 years. Some of these variations appear to correlate extremely well with in...
Multiproxy analyses of sediment cores from Lago Taypi Chaka Kkota (LTCK) Cordillera Real, Bolivia, provide a record of drier conditions following late Pleistocene deglaciation culminating in pronounced aridity between 6.2 and 2.3 ka B.P. Today LTCK is a glacial-fed lake that is relatively insensitive to changes in P}E because it is largely bu!ered from dry season draw-down through the year-roun...
Abstract Silica-scaled chrysophytes are a unique group of protists representing major component numerous aquatic habitats where they can significantly contribute to human well-being in many ways. In the present review, altogether 14 ecosystem services provided by silica-scaled were identified highlighting their importance and roles ecosystems. The most important supporting related primary produ...
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