Растительность и мерзлотные формы рельефа на острове Врангеля [Vegetation and permafrost relief in Wrangel Island]
- Author:
- Холод С.С. [Kholod S.S.]
- Year:
- 2014
- Journal:
- Комаровские чтения [Komarovskie chteniya / V.L. Komarov Memorial Lectures]
- Pages:
- 62: 241–313
- Url:
[in Russian with English abstract: ] The questions of the relationship of vegetation with permafrost landforms – patterned
ground, baydzharahs – are considered. The position of syntaxa, allocated on the basis of
floristic classifi cation, is revealed in the space of particle size, diameter of the polygons,
gipsometrical position of the edge with respect to its central part. For the purpose of detailed
research into the nature of relationships of permafrost landforms and vegetation 11 structural/morphological
types of patterned ground were allocated. Relationship between vegetation
(syntaxonomical spectrum) and patterned ground has a stochastic nature: one structural and morphological type corresponds to a few syntax, and one syntaxon can occur in several types
of patterned ground. The hypothesis of interconnected formation of soils and vegetation is
offered. The initiators of the emergence of patterned ground are mud cracks that may later
develop as frost ones. The process of becoming of vegetation is accompanied by expanding
and deepening of cracks, which generate a characteristic pattern of vegetation (reticulated
or polygonal-sell form). The processes of swelling of the central part of the spot, and wind
denudation of top soil lead only to a certain adjustment provisions of the sod from the center,
polygonal-sell system «soil – vegetation» is remains stable.
Keywords : syntaxa, arctic tundras, patterned grounds, structural-morphological types,
Wrangel Island.
- Id:
- 31344
- Submitter:
- zdenek
- Post_time:
- Wednesday, 03 July 2019 19:15