Community characteristics and population structure of dominant species of Abies fargesii forests in Shennongjia National Nature Reserve |
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Authors: | Yu Qian Xie Zongqiang Xiong Gaoming Chen Zhigang and Yang Jingyuan |
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Institution: | 1. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China;3. Shennongjia National Nature Reserve Administration in Hubei Province, Hubei 442421, China |
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Abstract: | In this paper, the community composition of Abies fargesii and the population structure of dominant species in this community were studied using a sampling plot method. The research plot was located in Shennongjia National Nature Reserve, China. Results showed that the appearance of the community was characterized by evergreen phanerophytes with microphyllous (or mesophyllous), coriaceous and single leaves. The vertical structure of the community can be clearly divided into 4 layers: arbor layer, shrub layer, herb layer and developed moss layer. Abies fargesii population was a developing population as there were more seedlings and young trees than old trees. Saplings were found more frequently in gaps than under the close canopy, which indicated a pattern of gap regeneration. The height structure of Abies fargesii population presented a reversed pyramid shape. Crown size structure of the population showed a typical reversed J shape. The relation between crown size and DBH (diameter at breast height) was closer than that between crown size and height. |
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Keywords: | Shennongjia Abies fargesii community composition population structure population dynamics |
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