应用生态学报2018，Vol.29Issue(1)：18-24,7.DOI:10.13287/j.1001-9332.201801.002
辽东山区次生林乔木幼苗分布格局与种间空间关联性
Spatial pattern and interspecific spatial association of tree seedlings in a secondary forest in montane region of eastern Liaoning Province, China
摘要
Abstract
We established a 4 hm2 (200 m×200 m) temperate secondary forest plot in the montane region of eastern Liaoning Province,China,and analyzed the spatial patterns and interspecific spatial associations of tree seedlings at scales of 0-50 m.The results showed that under complete spatial randomness null model,95％ of the species at the scale of 0-20 m showed a significant aggregation pattern,and 19 species at the scale of 0-16 m showed an aggregation pattern.The proportion of species exhibiting aggregated patterns decreased with the spatial scale.At the scale of 50 m,the random distribution pattern became the main form of tree species distribution.Under heterogeneous Poisson process null model,5％ of the species at the scale of 0-24 m showed a significant aggregation pattern,and 42％ and 58％ of the species at the scale of 26-50 m showed a random distribution and regularity patterns,respectively.Under complete spatial randomness null model,the proportion of species pairs of positive correlation was the highest,and at the scale of 50 m,the proportion of species pairs showed positive correlation,uncorrelated and negative correlation tended to be equal.Under heterogeneous Poisson process null model,species pairs mainly showed negative correlation,and the proportion of species pairs exhibiting negative correlation increased with spatial scale.The results implied that seed dispersal limitation and habitat heterogeneity could explain the aggregation pattern of tree seedlings.The strong aggregation of tree seedlings also contributed to close interspecific spatial associations and poor stability of the regeneration community.关键词
乔木幼苗/空间格局/种间空间关联性Key words
tree seedling/spatial pattern/interspecific spatial association引用本文复制引用
宗国,白雪娇,张淑媛,蔡军奇..辽东山区次生林乔木幼苗分布格局与种间空间关联性[J].应用生态学报,2018,29(1):18-24,7.基金项目
本文由国家自然科学基金项目(31300378)和辽宁省农业领域青年科技创新人才培养计划项目(2015047)资助 This work was supported by the National Natural Science Foundation of China (31300378) and the Cultivation Plan for Youth Agricultural Science and Technology Innovative Talents of Liaoning Province (2015047). （31300378）
