Fig. 5 | Journal of Paleolimnology

Fig. 5

From: Effects of climate change and industrialization on Lake Bolshoe Toko, eastern Siberia

Fig. 5

Diatom assemblage changes at the onset of industrialization in the mid-nineteenth century in Lake Bolshoe Toko. Changes in Cyclotella (sensu lato) and two groups of Aulacoseira (Aul.), calculated as difference between mean abundance before and after 1850 CE, as estimated by 210Pb and 137Cs dating of cores PG2203 and PG2139 and mapped onto cores PG2208 and PG2133. Genus Aulacoseira mainly consists of euplanktonic species (A. ambigua, A. subarctica and A. sp.) at deep sites (PG2203, PG2208). Shallow site PG2139 (and to a lesser degree intermediate site PG2133) reveals a higher proportion of tychoplanktonic A. distans and A. valida

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