文献类型：期刊文献

英文题名：Density-dependent and distance-dependent effects in a 60-ha tropical mountain rain forest in the Jianfengling mountains, Hainan Island, China: Spatial pattern analysis

作者：Miao, Ning[1] Xu, Han[2] Moermond, Timothy C.[1] Li, Yide[2] Liu, Shirong[3]

第一作者：Miao, Ning

通信作者：Liu, SR[1]

机构：[1]Sichuan Univ, Coll Life Sci, Minist Educ, Key Lab Bioresources & Ecoenvironm, Chengdu 610065, Sichuan, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[3]Chinese Acad Forestry, Inst Forest Ecol Environm & Protect, Key Lab Forest Ecol & Environm Natl Forestry & Gr, Beijing 100091, Peoples R China

年份：2018

卷号：429

起止页码：226-232

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;EI(收录号：20182905563233);Scopus(收录号：2-s2.0-85049887736);WOS:【SCI-EXPANDED(收录号:WOS:000447103700023)】；

基金：We are grateful to Fangliang He, Thorsten Wiegand, Kangshan Mao, and Stephen P. Hubbell for their helpful comments that improved this research. We gratefully acknowledge the support of all members for their assistance in field sampling, measurements, and data input. This study was jointly funded by the National Nonprofit Institute Research Grant of the Chinese Academy of Forestry (CAFYBB2011004), the China's National Natural Science Foundation (31200477), the National Key Research and Development Program of China (2016YFD0600203), and the State Forestry Administration (201104057). This study was also supported by the Jianfengling National Key Field Research Station for Tropical Forest Ecosystem Hainan Island, China. We also grateful to the two anonymous reviewers for their valuable comments that improved the manuscript.

语种：英文

外文关键词：O-ring statistics; Pair correlation function; Point pattern analysis; The random mortality hypothesis; Tropical mountain rain forest

摘要：To understand the density-dependent and distance-dependent effects on the spatial patterns of trees in tropical mountain rain forest, we used the recent developed O-ring statistic, which is a point pattern analysis method, to explore spatial distribution patterns and spatial associations of trees of different size-classes in a 60-ha tropical mountain rain forest plot in the Jianfengling Nature Reserve, Hainan Island, China. We describe four main findings. (1) As the size-classes of live trees increased, the live trees became more regular. (2) Densities of saplings, small trees, and dead trees tended to decrease with increasing distances, while densities of medium trees, big trees, and old-growth trees initially increased and then decreased at greater distances, showing a skewed inverted V-shaped pattern. (3) Densities of saplings, small trees, and medium trees first increased rapidly from 0 m to 5 m to 7 m radius (distance from old-growth trees) and then decreased continuously away from old growth trees, showing consistent patterns expect from the distance-dependent effect. (4) Mortality was non-random, and dead trees were significantly aggregated with live trees at scales < 2 m, showing clustering of dead (or surviving) trees and clear density dependence where stems with more neighbors had a higher risk of mortality. We concluded that size and spacing effects play important roles in determining spatial distribution patterns of the trees in the Jianfengling tropical mountain rain forest plot.