HU Gang1,2, ZHANG Zhonghua1,2, CHENG Anyun3,4, LIU Libin3,4, WU Yangyang3,4, NI Jian3,4,5
（1. Key Laboratory of Beibu Gulf Environment Change and Resources Utilization of Ministry of Education, Guangxi Teachers Education University, Nanning 530001, China;
2. Collaborative Innovation Center of the Ecological Environment and Integration Development in the Xijiang River Basin, Guangxi Teachers Education University, Nanning 530001, China;
3. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;
4. Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, China;
5. College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China)
Abstract: Evaluation of stand spatial structure can provide important information on present state, growth processes inside a forest, and will benefit monitoring the stand dynamic processes and guide the restoration and reconstruction of degraded vegetation. Based on the survey data of a 2 hm2 forest plot in Tianlong Mountain in central Guizhou Province of China, and using the mingling degree, neighborhood comparison and uniform angle index, this paper characterized and analyzed the stand spatial structure of a northern subtropical karst secondary forest. Results showed that the average mingling degree, average neighborhood comparison and average uniform angle index was 0.737、0.498 and 0.516, respectively, which indicated that the stand of secondary forest was in a state of intensive mingling, middle size difference and slight aggregate distribution. This finding could provide reference for taking management for optimizing spatial structure of natural secondary forest and for directing the restoration and reconstruction of vegetation in the karst area of southwest China.
Keywords: karst; secondary forest, stand spatial structure, Tianlong Mountain
EARTH AND ENVIRONMENT Vol.45, No.1 Tot No.315, 2017, Page 25-31
