Stable isotopes of carbon in modern plants of tracts of the key terrain of Marre-Sale (Western Yamal)

Abstract

Studies of the dependence of the accumulation of stable carbon isotopes on the growing conditions in modern plant species of tundra are very relevant. It was discovered that the same plant species accumulate the stable 13C isotope in different ways. The goal of this work is to reveal the relationship between the content of the stable 13C isotope in modern plants and the natural conditions of typical terrains of the tundra of the Western Yamal. At the geocryological station Marre-Sale, modern plant species were selected that grow under conditions of different moisture and remoteness from the sea. Modern plant species were determined using determinant atlases, carbon isotope contents using a DELTA V Advantage isotope mass spectrometer in the laboratory of LBIT (IMCES SB RAS). In different tracts, for identical plants the distribution of carbon isotopes depending on moisture was confirmed: the heavier 13С accumulates in dry ones, and lighter in humid and moist ones. It was determined that near the sea, the same plants of dry and wet tracts accumulate heavier 13С due to the influence of marine aerosols.