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Influences of environmental factors on species distribution in forest community in Wengyuan Qingyunshan Nature Reserve, Guangdong.

CHEN Xiao-xi1,2, YANG Xin-dong3, ZENG Xian-xing3, CHEN Liu-bao3, XIE Chong-lin3, HUANG Jiu-xiang1*, WU Jian-hui4, LI Yi-de4, XU Han4   

  1. (1South China Limestone Plants Research Center, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; 2Shenzhen Landscape Co., Ltd., Shenzhen 518001, Guangdong, China; 3Administrative Office of Wengyuan Qingyunshan Provincial Nature Reserve, Shaoguan 512600, Guangdong, China; 4Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China).
  • Online:2019-12-10 Published:2019-12-10

Abstract: Uncovering the relationship between species distribution and environmental factors is the basis and premise for in-depth understanding of forest communities. In this study, 14 permanent plots were set up in Qingyunshan Nature Reserve. We used twoway indicator species analysis (TWINSPAN), redundancy analysis (RDA), Monte Carlo test, and variation partitioning to analyze the relationship between plant species distribution and environmental factors. The results showed that: (1) According to the TWINSPAN, 14 plots were classified into five communities: Castanopsis fissa+Castanopsis carlesii, Pleioblastus amarus+Cryptocarya chingii, Rhododendron kwangtungense+Lithocarpus naiadarum, Schima superba+Rhododendron moulmainense, and Cunninghamia lanceolata+Phyllostachys eduliscommunities. (2) The results of RDA and Monte Carlo tests showed that elevation, soil total calcium content, soil water content, soil pH, soil cation exchange capacity and soil available phosphorus were the main environmental factors affecting species distribution. (3) Results from variation partitioning showed that these 10 tested factors could explain 85.2% variation of species distribution. Among those factors, topographical, soil factors and their interaction accounted for 16.2%, 62.3% and 6.7% of the variation, respectively. 14.8% of the variation were unexplained. This result indicated that species distribution was mainly affected by the environmental factors, and less affected by the interaction between organisms and random factors.

Key words: water environment, nitrogen cycle, stable nitrogen isotope, measured methods, application.