Interspecific Segregation in the Main Species of Evergreen Broad-leaved Forest in Nanling National Nature Reserve, Guangdong Province
HU Wen-Qiang1, HUANG Shi-Neng1, LI Jia-Xiang2, ZHOU Guang-Yi1, WANG Xu1
1. Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China;
2. Central South University of Forestry and Technology, Changsha 410026, China
Analyzing interspecific segregation helps reveal species interactions, community structure and dynamics. We established 36 quadrats and drew a distribution map for 27 species numbering 10 or more. Using ArcView GIS software and the nearest-neighbor method, interspecific segregation was studied with an N ×N nearest-neighbor contingency table, a 2 ×2 nearest-neighbor contingency sub-table, and Pielou's coefficient of segregation for the individual tree species. Distribution patterns were measured by a revised Clark-Evans index (CE) and the widely-used χ2 method. Results showed that:(1) three tree species were clumped, and the others were random;(2) Most species pairs were positively segregated (59.83%), some species pairs were randomly segregated (40.17%), and no species pairs were negatively segregated;(3) Some differences existed among different species in the interspecific segregation of all species. Larger individuals representing dominant species in the communities tended to be positively segregated with other large trees, though sometimes tended to random segregation;(4) Interspecific segregation was closely related to distribution patterns. There was a larger proportion of positive segregation between clumped species and other species than there was negative segregation. Most random segregation occurred between random species, which also caused slight positive or negative segregation;(5) The 27 species overlapped in distribution and were characterized by overall non-segregation.
胡文强, 黄世能, 李家湘, 周光益, 王旭. 南岭国家级自然保护区常绿阔叶林主要树种的种间分离[J]. 植物科学学报, 2014, 32(5): 467-474.
HU Wen-Qiang, HUANG Shi-Neng, LI Jia-Xiang, ZHOU Guang-Yi, WANG Xu. Interspecific Segregation in the Main Species of Evergreen Broad-leaved Forest in Nanling National Nature Reserve, Guangdong Province. , 2014, 32(5): 467-474.