山西稀有濒危植物脱皮榆群落的种间分离  

Interspecific Segregation of Rare and Endangered Plant Ulmus lamellosa Communities in Shanxi Province

作　　者：王晓霞[1] 张钦弟[1] 毕润成[1] 段晓梅[1] 

机构地区：[1]山西师范大学生命科学学院,山西临汾041004

出　　处：《西北植物学报》2013年第12期2537-2542,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：山西省化学优势重点学科建设项目(912019);山西省青年科技研究基金(2013021030-3);山西师范大学校科学研究基金(ZR1218);山西师范大学生命学院科学研究基金(SMYKZ-19)

摘　　要：通过对山西太岳山脱皮榆群落1hm2样地内出现的14种乔木进行调查,在应用ArcGIS软件分析每个个体的最近邻体植株的基础上,采用N×N最近邻体列联表及其2×2列联表截表的方法和Pielou分离指数计算分析了脱皮榆群落的种间分离规律,并根据种间分离情况以及物种对环境的适应方式,利用PCA排序将样地中14个物种进行了生态种组的划分。结果表明:(1)该群落中出现的14种乔木构成的91个种对中,随机毗邻种对占绝大多数(74.73%),正分离种对较少(23.07%),负分离种对极少(2.20%),群落趋于稳定。(2)群落的种间分离在不同种之间存在着一定的差异,脱皮榆仅与其他树种随机毗邻;正分离常发生在群落中的优势种之间,而负分离常发生在群落中的伴生种之间。(3)种间分离与群落的生境异质性和物种的生态需求具有密切的关系,即两个具有不同生境要求的物种之间常常发生正分离,而具有相同或相似生境要求的物种之间常常发生负分离。(4)脱皮榆群落中14种乔木可划分为3个生态种组。研究认为,脱皮榆群落内物种的总体分离规律为全面不分离。由生境异质性、物种间不同的生物学特性和生态需求为基础的种间关系可能是维持太岳山脱皮榆群落稳定共存的机制之一。Based on field data,we established 100 quadrats within fourteen tree species in Taiyue Mountain of Shanxi. We analyzed interspeeific segregation by using AreView GIS software and the nearest neighbor method,interspecific segregation was studied with an N × N nearest-neighbor contingency table, a 2 × 2 nearest-neighbor contingency sub-table,and Pielou coefficient of segregation（S）. According to their adapt ability to the environment and relationships between plants and environment, assisting in principal components analysis,the 14 species divided into three ecological species groups （ESG）. The results showed： （1） Most of the species pairs are randomly segregated （74.73%）, some species pairs are positively segregated （23.07%） ,and only a few species pairs are negatively segregated （2.20%）. （2）There are some differences among different species in the interspecific segregation of all species. The Ulmus lamellosa in the communities tended to be randomly segregated with other species. Positive segregation appeared among dominant species, probably because of their stronger competitive vigor. For example,Carpinus cordata ,Acer elegantulum and Populus davidiana are tended to be positively segregated each other. Negative segregation appeared among companion species in the communities, such as Carpinus turczaninowii ,Acer grosseri, Koelreuteria paniculata and Acer ginnala. （3）The interspecific segregation is related to the heterogeneity in the communities,in that segregation often occurs between two species which have different habitat requirements;while the aggregation often appears between two species which have same or similar environmentally requirements. （4）In Ulmus lamellosa communities,the 14 species divided into three ecological species groups. On the whole, the 14 species we studied overlapped in distribution and were characterized by overall non-segregation. The interspecific relationships based on different species are adapted and their biological requirements may be one o

关 键 词：脱皮榆 种间分离 分离指数 生态种组 

分 类 号：Q948.157[生物学—植物学]