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Roberts, Sarah L; Swann, George E A; McGowan, Suzanne; Panizzo, Virginia N; Vologina, Elena G; Sturm, Michael; Mackay, Anson W (2019): Lake Baikal diatom assemblage data from sediment cores covering the last 200 years [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.897259, Supplement to: Roberts, SL et al. (2018): Diatom evidence of 20th century ecosystem change in Lake Baikal, Siberia. PLoS ONE, 13(12), e0208765, https://doi.org/10.1371/journal.pone.0208765

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Abstract:
Lake Baikal has been experiencing limnological changes from recent atmospheric warming since the 1950s, with rising lake water temperatures, reduced ice cover duration and reduced lake surface-water mixing due to stronger thermal stratification. This study uses lake sediment cores to reconstruct recent changes (c. past 20 years) in Lake Baikal's pelagic diatom communities relative to previous 20th century diatom assemblage records collected in 1993 and 1994 at the same locations in the lake. Recent changes documented within the core-top diatom records agree with predictions of diatom responses to warming at Lake Baikal. Sediments in the south basin of the lake exhibit clear temporal changes, with the most rapid occurring in the 1990's with shifts towards higher abundances of the cosmopolitan Synedra acus and a decline in endemic species, mainly Cyclotella minuta and Stephanodiscus meyerii and to a lesser extent Aulacoseira baicalensis and Aulacoseira skvortzowii. The north basin, in contrast, shows no evidence of recent diatom response to lake warming despite marked declines in north basin ice cover in recent decades. This study also shows no diatom-inferred evidence of eutrophication from deep water sediments. However, due to the localised impacts seen in areas of Lake Baikal's shoreline from nutrient pollution derived from inadequate sewage treatment, urgent action is vital to prevent anthropogenic pollution extending into the open waters.
Coverage:
Median Latitude: 53.098373 * Median Longitude: 106.796591 * South-bound Latitude: 51.568330 * West-bound Longitude: 104.300030 * North-bound Latitude: 55.649390 * East-bound Longitude: 109.782690
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
7 datasets

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Datasets listed in this publication series

  1. Roberts, SL; Swann, GEA; McGowan, S et al. (2019): Lake Baikal diatom assemblage data from the sediment core BAIK13-4F covering the last 200 years. https://doi.org/10.1594/PANGAEA.897257
  2. Roberts, SL; Swann, GEA; McGowan, S et al. (2019): Lake Baikal diatom assemblage data from the sediment core BAIK13-7A covering the last 200 years. https://doi.org/10.1594/PANGAEA.897258
  3. Roberts, SL; Swann, GEA; McGowan, S et al. (2019): Lake Baikal diatom assemblage data from the sediment core BAIK13-10A covering the last 200 years. https://doi.org/10.1594/PANGAEA.897252
  4. Roberts, SL; Swann, GEA; McGowan, S et al. (2019): Lake Baikal diatom assemblage data from the sediment core BAIK13-11C covering the last 200 years. https://doi.org/10.1594/PANGAEA.897253
  5. Roberts, SL; Swann, GEA; McGowan, S et al. (2019): Lake Baikal diatom assemblage data from the sediment core BAIK13-14C covering the last 200 years. https://doi.org/10.1594/PANGAEA.897254
  6. Roberts, SL; Swann, GEA; McGowan, S et al. (2019): Lake Baikal diatom assemblage data from the sediment core BAIK13-18A covering the last 200 years. https://doi.org/10.1594/PANGAEA.897255
  7. Roberts, SL; Swann, GEA; McGowan, S et al. (2019): Lake Baikal diatom assemblage data from the sediment core BAIK13-19B covering the last 200 years. https://doi.org/10.1594/PANGAEA.897256