Analysis of long-term dynamics of the plankton community of Lake Baikal

Long-term dynamics of dominant diatom species abundance of spring phytoplankton in three basins of the pelagic zone of Lake Baikal in 1964-1984 and 2007-2016

“…radians with simultaneous tendency of decrease in the abundance of endemic large-cell species of under-ice developing diatom algae. These authors concluded that the observed trends can be explained by global climatic change (Rusanovskaya et al, 2020).…”

“…Southern Baikal has demonstrated the tendencies of the increase in water temperature in the upper 50-meter layer over the last 70 years, water transparency and chlorophyll-a concentration in the open water season over the past 40 years (Rusanovskaya et al, 2020). Analysis of the dynamics of the dominant species of phytoplankton has shown the increase in abundance of non-endemic small-cell species of diatom algae S. acus subsp.…”

“…Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 3 Irkutsk,664033,Russia Long-term dynamics of dominant diatom species abundance of spring phytoplankton in three basins of the pelagic zone of Lake Baikal in 1964-1984 and 2007-2016 Permanent annual observations of Southern Baikal phytoplankton have been performed by the Institute of Biology since 1945 at a station near Bol'shye Koty 2.2 km away from the shore (Antipova and Kozhov, 1953;Antipova, 1963;Kozhov, 1963;Kozhova and Izmest'eva, 1998;Izmest'eva et al, 2001;Mokry, 2011;Hampton et al, 2008;Rusanovskaya et al, 2020). The authors did not reveal any considerable variations in phytoplankton in spring (Izmest'eva et al, 2001;Mokry, 2011).…”

Human impact and ecosystemic health at Lake Baikal

“…The dominant diatom algae, such as Aulacoseira baicalensis , A. islandica and Stephanodiscus meyerii and dinoflagellates such as Gymnodinium baicalense , develop in mass under ice, providing food for other organisms—predominantly zooplankton, mostly represented by the microscopic crustacean Epischurella baikalensis . Monitoring data demonstrate a significant warming‐related shift in species composition both in phyto‐ and zooplankton: the number of cold‐loving and ice‐related endemic species is declining, while warm‐loving cosmopolite species are becoming more dominant (Bondarenko, Vorobyova, Zhuchenko, & Golobokova, 2020; Izmest'eva, Silow, & Litchman, 2011; Roberts et al, 2018; Rusanovskaya et al, 2020). Additionally, the depth distribution of many plankton groups has changed due to increased stratification and reduced mixing (Hampton et al, 2014).…”