A new approach to historical reconstruction: combining descriptive and experimental paleolimnology

Article Abstract:

A new approach to historical reconstruction, combining descriptive and experimental paleolimnology and going beyond mere description of historical genetic changes, is discussed and dubbed resurrection ecology. Chemical and remain fluxes have been documented from accurately dated lake sediments and experiments with past sediments in the Keweenaw Peninsula area of Lake Superior where once the second-largest producer of copper in the world was found. Changes in flux of microfossils and associated elemental tracers were used to investigate. Toxicity tests with sediments and Daphnia were used too. Humic acids flowing in from several rivers and fulvic acid are detoxifying, and there are organic complexing agents.

Germany, Statistical Data Included, Water pollution, Copper, Lakes, Mineral deposits, Mines and mineral resources, Mining, Paleolimnology

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Stable isotope analyses of the pelagic food web in Lake Baikal

Article Abstract:

Stable isotope analyses have been carried out on the pelagic food web in Lake Baikal in central southern Siberia. Five major ecological groups are in the simple food web of the lake, mesozooplankton (Epischura baicalensis), phytoplankton (Aulacoseira baicalensis), macrozooplankton amphipod (Macrohectopus branickii), seal (Phoca sibirica) and fish (5 species). Carbon isotope data showed that pelagic phytoplankton are the main carbon source of this food web, which has an ideal, isotopically ordered structure. Analysis of carbon and nitrogen stable isotopes can be used to show trophic relationships.

Japan, Russia, Carbon, Siberia, Food chains (Ecology), Food chains, Freshwater ecology, Lake Baikal, Carbon isotopes, Limnology

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