北京林业大学学报Issue(6)：73-79,7.DOI:10.13332/j.cnki.jbfu.2014.06.015
吉林蛟河近熟林树种多样性格局尺度依赖性分析
Scale dependence of species diversity pattern in a near-mature forest in Jiaohe of Jilin Province
摘要
Abstract
Both habitat filtering and dispersal limitation are the key ecological processes affecting the structuring of community diversity pattern. The spatial scales at which different ecological processes work were determined in the structuring of species diversity pattern. The effect of 40 woody species on the local species richness was examined by individual species-area relationship model. The significance of deviation of individual species-area relationship from neutral condition was analyzed by homogeneous Poisson process, heterogeneous Poisson process, homogeneous Thomas process and heterogeneous Thomas process. The results revealed that Corylus mandshurica, Rhamnus davurica, Lonicera praeflorens, Acer ginnala and Fraxinus rhynchophylla were diversity accumulators at 0-- 50 m spatial scales. Tilia mandshurica at 0--25 m scale and Carpinus cordata at 0--35 m scale were diversity repellers, while most of other species were neutrals. The dispersal limitation greatly affected the structuring of community diversity pattern;however, the effect of habitat filtering was relative small. Heterogeneous Thomas model could simultaneously exclude the effects of habitat filtering and dispersal limitation. The results indicated that diversity accumulators were dominant at 0--20 m spatial scales in forest community. The proportion of diversity neutrals at scale >20 m increased with the increasing spatial scales, and the diversity neutrals dominated the structuring of the community diversity. Diversity repellers kept in a very low proportion at all scales. Thus, the niche differentiation and neutral processes jointly determined the structuring processes of community diversity, and the relative importance of both was closely correlated with the spatial scales.关键词
物种多样性/扩散限制/生境过滤/单物种-面积关系Key words
species diversity/dispersal limitation/habitat filtering/individual species-area relationship分类
农业科技引用本文复制引用
范春雨,元正龙,赵秀海..吉林蛟河近熟林树种多样性格局尺度依赖性分析[J].北京林业大学学报,2014,(6):73-79,7.基金项目
北京高等学校青年英才计划(YETP0739)、教育部新世纪优秀人才支持计划项目(NCET-12-0781)、北京市共建项目专项“天然林生物多样性保护技术与杨树抗逆机理研究2012”。 （YETP0739）
