Индикационные возможности экотонных лесотундровых сообществ Ямала

Abstract

In order to expand the possibilities of soil cover remote monitoring and improve prognostic models of seasonal thawing depth dynamics in connection with global climatic changes, verification of correspondence between plant and soil components of the Subarctic landscapes is necessary. This is most relevant for the forest-tundra zone, where the variety and mosaicity of soils and vegetation is great due to its ecotonic position. The purpose of this work was to study the relationship of vegetation with the characteristics of cryogenic soils and the dynamics of the seasonal layer in forest-tundra landscapes. Data were obtained during 5-year monitoring studies at key sites in southern Yamal under the different plant communities. It was revealed that the thickness of the organogenic horizons (represented in the tundra conditions by the peat pillow), as well as the value of the moss phytomass, determine the active layer thickness. A close connection with relief and soils allows the use of vegetation as an indicator of the soil texture and the depth of seasonal layer occurrence and features.