CENTRE ON THE PROBLEMS OF ECOLOGY AND PRODUCTIVITY OF FORESTS
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CENTRE ON THE PROBLEMS OF ECOLOGY AND PRODUCTIVITY OF FORESTS |
RUSSIAN ACADEMY OF SCIENCES |
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V.V. Akatov, T.V. Akatova, E.A. Grabenko Changes of the Altitudinal Limit of Black Locust and American Maple Growth in Belaya River Valley, Western Caucasus // Forest Science (Lesovedenie). 2014. No 1. С.21-33. The trends of the altitudinal change of two adventive tree species, Robinia pseudoacacia L. and Acer negundo L., are assessed by tracking the state of the populations at 70 to 700 m a. s. l. heights in Belaya River valley, Western Caucasus. As analyzed parameters was used Vitality, age, diameter and radial increment of the trees are examined. It is shown that the upper limits of these species in Belaya river valley are not climate induced. They remained stable during recent decades (the age of trees of both species on the upper limits exceeds 70 years). 85% of Robinia pseudoacacia individuals and 95% of Acer negundo individuals were less than 20 years age. The climate change in the region is suggested to be one of the reasons of the sharp expansion of the populations since the end of the 20th century. Age structure, trunk diameter, vitality, radial increment, population, altitudinal limit, adventive species, Robinia pseudoacacia, Acer negundo, climate change, Western Caucasus . |
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