An environmental reconstruction of vegetation and climate is inferred from pollen records of Lake Rubskoe (Ivanovo region, Central Russia). The reconstruction suggests a general prevalence of pollen of broad-leaved trees. The results suggest a relatively cold period during the earlier part of the record (500–400 cm) followed by a warmer period (400–160 cm). Climate conditions similar to modern ones are reconstructed for the youngest sediments (160–50 cm).

This article extends the findings of our previous research “Preliminary reconstruction of climate changes and vegetation cover inferred from pollen study of the arctic lake bottom sediments from the southwestern part of the Yamal Peninsula” (G.R. Nigamatzyanova, N.M. Nigmatullin, B.I. Gareev, O.N. Tumanov, L.A. Frolova, 21st International Multidisciplinary Scientific GeoConference SGEM. 4 (2021) 415-421. https://doi.org/10.5593/sgem2021/4.1/s19.53) [1].

In the following article there are introduced the first researching results of 27 water bodies of polygonal tundra in Kytalyk Wildlife Reserve in the summer 2011. The evaluation of physic-hydrochemical indexes of water bodies is given. The basic structure-forming characteristics of zooplankton communities are analyzed. The ecological state of the lakes is estimated.