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2018, № 73

UDC: 581.9:630.2:630.18:551.4
GSNTI: 68.47.03

A spatio-structural analysis of intact dark taiga in the southern taiga zone and an interval assessment of a dark conifer mixed forest in the mountain forest steppe zone (Mongolia)

Since the last century, the area of undisturbed, intact dark taiga has constantly decreased. We analysed non-spatial and spatial forest structure of three types of dark taiga in Mongolia. Our study concentrates on data from remote research areas stocked with mature intact dark taiga in the in the Western Khentey Mountains ("Altantulkhur" and "Halon Arshan") and one sample of an isolated dark coniferous mixed forest ("Altansumber") on the Buren Nuruu ridge, which is surrounded by mountain forest steppe (Mongolia). Of the plot "Altansumber" data of an interval assessment (2009 and 2013) were analysed. The results indicated highest productivity for the site "Altantulkhur". Spatial tree distribution pattern was found to be random on the analysed dark taiga plots. The species average spatial status (MSsp), which refers to mingling with other species, was for Abies sibirica and Picea obovata mostly low to medium, whereas typical light taiga tree species (Betula, Larix), if present, exhibited high MSsp-values. Pinus sibirica largely exhibited medium values. Tree species spatial diversity (TSS) was highest on the plot "Halon Arshan 2". The interval assessment (2009-2013) of the isolated dark conifer mixed forest outpost ("Altansumber") indicated a further decrease of the temperature sensitive spruce and an increase of birch and larch on this forest site without detection of any obvious exogenous impact during the assessment interval.
Keywords: Mongolia, dark taiga , monitoring
DOI: 10.21515/1999-1703-73-36-44

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Authors:

1. Gradel Alexander, Ph.D., Consultant on Forestry and FSC-Auditor (CoC), University of Göttingen (Germany).
2. Voinkov Aleksandr Aleksandrovich, Phd in Biology, Lecturer, Buryat State Academy of Agriculture, Ulan-Ude, Buryat State Academy of Agriculture, Ulan-Ude.
3. Altaev Aleksandr Arhipovich, Ph.D., Lecturer, Chair of Silviculture and Forest Management, Buryat State Academy of Agriculture, Ulan-Ude.
4. Enkhtuya Bazarradnaa, Phd in Biology, Lecturer and Soil Scientist, Mongolian University of Life Sciences, Darkhan (Mongolia).