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Evolution of the Hydrobiological Communities of a Coastal Lake in the Novaya Zemlya Archipelago (Southern Island, Arctic Russia) in Relation to Climate Change Following the End of the Little Ice Age
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Evolution of the Hydrobiological Communities of a Coastal Lake in the Novaya Zemlya Archipelago (Southern Island, Arctic Russia) in Relation to Climate Change Following the End of the Little Ice Age
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Evolution of the Hydrobiological Communities of a Coastal Lake in the Novaya Zemlya Archipelago (Southern Island, Arctic Russia) in Relation to Climate Change Following the End of the Little Ice Age
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Journal Article
Evolution of the Hydrobiological Communities of a Coastal Lake in the Novaya Zemlya Archipelago (Southern Island, Arctic Russia) in Relation to Climate Change Following the End of the Little Ice Age
2025
Overview
There are very few data linking recent climatic changes to changes in biological communities in the Russian Arctic, and no palaeoecological data are available from the Novaya Zemlya archipelago (NZ). We studied chironomid, cladoceran, and diatom communities from a 165-year-old sediment core from a lake on Southern Island, NZ. Sixteen diatom and four cladoceran species new to NZ were found in the lake. Significant changes occurred in biological communities; species turnover was highest for diatoms (2.533 SD), followed by chironomids (1.781 SD) and cladocerans (0.614 SD). Biological communities showed a correlation with meteorologically recorded climate parameters. For chironomids, the strongest relationships were found for TJune, TJuly, and Tann. Both planktonic proxies, diatoms, and cladocerans showed a relationship with summer and annual air temperature and precipitation. The largest shifts in communities can be linked to recent climatic events, including the onset of steady warming following the variable conditions at the end of the LIA (ca. 1905), the cooling associated with the highest precipitation on record between 1950 and 1970, and, probably, the anthropogenic influence specific to Novaya Zemlya at this time. The new data provide a valuable basis for future ecological studies in one of the least explored and remote Arctic regions.
