宝天曼自然保护区树附生苔藓空间格局分析  

Spatial pattern analysis for epiphytic bryophytes in Baotianman Nature Reserve

作　　者：许宁[1] 韦博良[1] 胡金涛[1] 贾宏汝 叶永忠[1] 袁志良[1] 

机构地区：[1]河南农业大学生命科学学院,河南郑州450002 [2]河南财政金融学院,河南郑州450052

出　　处：《河南农业大学学报》2017年第2期230-236,共7页Journal of Henan Agricultural University

基　　金：河南省科技攻关项目(132102110133);河南省教育厅科学技术研究重点项目(14A180013)

摘　　要：采用单变量g(r)函数,选用同质性泊松、异质性泊松、同质性托马斯和异质性托马斯4个零模型,分析了宝天曼自然保护区内1 hm^2样地中11种树附生苔藓物种的空间分布格局。结果显示,11个物种中,有6个物种在同质性泊松模型下表现出聚集分布,在同质性托马斯模型下的聚集程度有所减弱,但在异质性泊松模型下完全变为随机分布。与同质性泊松模型下的分布相比,在异质性泊松模型下,有4个物种在较大尺度上的聚集分布变为随机分布;而在同质性托马斯模型下,有2个物种在较小尺度上的聚集分布变为随机分布。研究表明:1)生境异质性和扩散限制均对树附生苔藓空间分布格局的形成有影响,且生境异质性起主要作用;2)生境异质性可在小尺度上影响树附生苔藓的空间分布,扩散限制也能在大尺度上发挥作用。In this study, we univariate of g （r） function, analysed the spatial pattern of 11 along with homogeneous Poisson epiphytic bryophytes species by using model, heterogeneous Poisson model, homogeneous Thomas model and heterogeneous Thomas model, in the 100 m -100 m plot area of Bao- tianman Nature Reserve. The results showed that： 1 ） 6 out of 11 species showed aggregation distribu- tion in the homogeneous Poisson model, and the aggregation decreased under the homogeneous Thomas model. But all of them were randomly distributed in the heterogeneous Poisson model; 2） Compared with the distribution under the homogeneous Poisson model, 4 species＇ aggregation distribution turned into random distribution on the large scale of the heterogeneous Poisson model; And 2 species＇ aggre- gation distribution developed into random distribution on a small scale of homogeneous Thomas model. The research suggests that： 1 ） Both habitat heterogeneity and dispersal limitation have effects on the spatial distribution pattern of epiphytic bryophytes, and the habitat heterogeneity plays a major role ; 2） Habitat heterogeneity can affect the spatial distribution of epiphytic bryophytes on a small scale, and dispersal limitation can also work on a large scale.

关 键 词：树附生苔藓 空间格局 零模型 生境异质性 扩散限制 

分 类 号：S718[农业科学—林学]