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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Тrefilova O.V., Vedrova Е.F., Kuz'michev V.V. Тhе Annual Carbon Cycle in Green-Moss Pine Forests оf the Yenisey Plain // Forest Science (Lesovedenie). 2011. No.1. P. 3-12 (in Russian). The main parameters of the annual carbon cycle were studied in 20-, 55-, 90-, and 250-year old green moss pine forests of the Yenisey plain (Zotinskii experimental polygon; 60º53' N, 89º38' Е). The total carbon reserves in the stands studied amount to 131-200 t С ha-1. In the young forest, the С amounts in the phytomass, phytodetritus and soil humus were 46, 35, and 18%, in the stands of other ages - 66, 23, and 10%, respectively. The intensity of the phytomass increment (NPP) decreased with age of the forests and equaled 5.6 t С ha-1 in the young forest and 2.4 t С ha-1 in the overmature ones. Thus, the net ecosystem production (NEP) was mainly determined bу age changes in the NPP intensity. The analysis of NEP showed that the young forest and the forest of medium age served as а "stock" for atmospheric carbon. In the ripening forest, the intensity of production and destruction processes were practically balanced, and the overmature pine forest functioned as а "source". Carbon cycle, reserve, phytomass, phytodetritus, soil humus, net ecosystem production, heterotrophic respiration, easy-mineralized organic matter. |
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