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Influence of moss and lichen spatial mosaics on radial growth of Gmelin larch (Central Evenkia)

Author:
Benkova, V. E., Zyryanova, O. A., Shashkin, A. V., Benkova, A. V., Sobachkin, D. S., Simanko, V. V., Zyryanov, V. I.
Source:
Contemporary problems of ecology 2015 v.8 no.7 pp. 854-861
ISSN:
1995-4255
Subject:
Cladonia rangiferina, Hylocomium splendens, Larix gmelinii, Pleurozium schreberi, air temperature, cambium, climatic factors, forests, lichens, mosses and liverworts, soil thermal properties, taiga, thermal properties, trees
Abstract:
The results of research studies on the influence of high moss-and-lichen mosaicity typical for the northern taiga in Central Evenkia on the dynamics of radial growth of Gmelin larch trees (Larix gmelinii (Rupr.) Rupr.) are reported. Three sample plots were laid out in the larch ledum–cowberry–green moss forest on the northwest facing slope (8°–10°) in close proximity to each other; they differed in the proportions of area occupied by the principal components of a moss–lichen cover (Aulacomnium turgidum, Pleurozium schreberi, Cladonia rangiferina, and Hylocomium splendens), spatial distribution, and thermal properties of seasonally thawed soil layers. The worst thermal soil properties under the current climatic conditions have determined the comparatively low radial growth of trees in the sampling area, reduced response to air-temperature variations in the period of preseason cambium activity and at the beginning of the radial growth period, and heightened the response to this factor at the end of a season.
Agid:
4778628