贵州北盘江石漠化区植物群落物种多样性及主要乔木种间联结性  

Species Diversity of Plant Communities and Interspecific Connectivity of Main Trees in the Rocky Desertification Area of the Beipanjiang River in Guizhou Province

作　　者：陈龙 安明态[2,3] 任娇娇[2] 潘端云 叶超 崔兴勇 黄郎 金勇 CHEN Long;AN Ming-tai;REN Jiao-jiao;PAN Duan-yun;YE Chao;CUI Xing-yong;HUANG Lang;JIN Yong(College of Forestry,Guizhou University,Guiyang 550025,China;Research Center for Biodiversity and Nature Conservation,Guizhou University,Guiyang 550025,China;Forestry Science Research Institute of Zunyi,Zunyi Guizhou 563001,China)

机构地区：[1]贵州大学林学院,贵阳550025 [2]贵州大学生物多样性与自然保护研究中心,贵阳550025 [3]遵义市林业科学研究所,贵州遵义563001

出　　处：《西南大学学报（自然科学版）》2020年第5期80-94,共15页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金项目(31960042);贵州省林业科研课题(黔林科合[2016]05号).

摘　　要：以北盘江流域石漠化区现存植被进行样地调查,采用物种丰富度指数、Shannon-Weiner指数、Simpson指数和Pielou均匀度指数分析北盘江强度石漠化区植物群落的多样性特征,同时在2×2联列表基础上,应用X 2检验、相似性指数、重合度指数、共同出现百分率及联结系数和种间共同出现的百分率研究了强度石漠化区乔木种群的种间联结性.结果表明:①维管植物共计445种,隶属102科288属,主要优势科为:菊科、蔷薇科、禾本科、蝶形花科和大戟科;②样地内总体上来说,尽管群落受高度异质性小生境的影响,物种仍较为丰富,群落各层物种丰富度和多样性各有不同.其中,物种丰富度指数(R)从大到小依次为:灌木层(4.19)、草本层(3.5)、乔木层(1.66),Simpson多样性指数、Shannon-Wiener多样性指数、和Pielou均匀度指数变化规律均相差不大,主要优势种为圆果化香树、复羽叶栾树、青檀、圆叶乌桕、南酸枣、栓皮栎、安顺润楠、岩樟、翅荚香槐和清香木;③X 2检验结果显示,样地内15个优势种91个树种对中仅有4个树种对之间存在显著的相关性,说明群落种间关联极弱.从联结系数(AC)来看,91个树种对中正联结的种对有42对,占总对数的比例为46.15%,负联结的有49对,占总对数的比例为53.85%.关联强度大部分集中在相对较低的水平,表明该地区群落不稳定.Based on a sample plot inventory of the existing vegetation in the rocky desertification zone of the Beipanjiang basin,the diversity characteristics of plant communities in the intensity rocky desertification zone were analyzed with species richness index,Shannon-Weiner index,Simpson index and Pielou evenness index.In addition,on the basis of 2×2 linked list,the interspecific coupling of arbor populations in the intensity rocky desertification zone was studied,using X 2 test and OI similarity index,DI coincidence index,joint occurrence percentage of JI,coupling coefficient AC and interspecific percentage of PC.The results showed that there were 445 kinds of vascular plants,belonging to 102 families and 288 genera,the dominant families being Compositae,Rosaceae,Gramineae,Papilionaceae and Euphorbiaceae.In general,although the communities were affected by the highly heterogeneous niches,the species richness in the sample plots remained fairly abundant.The species richness and diversity of the various layers of the communities were different.The species richness index(R)was 4.19,3.50 and 1.66 for the shrub layer,the herbaceous layer and the arbor layer,respectively,and the three layers were not significantly different in their Simpson diversity index,Shannon-Wiener diversity index and Pielou evenness index.Platycarya strobilacea,Koelreuteria bipinnata,Pteroceltis tatarinowii,Triadica rotundifolia,Choerospondias axillaris,Quercus variabilis,Machilus cavaleriei,Cinnamomum saxatile,Cladrastis platycarpa and Pistacia weinmanniifolia were the main dominant species.The results of X2 test indicated that of the 91 species pairs involving the15 dominant species in the sample plots only four pairs showed significant correlation,suggesting that the association between community species was very weak.According to the coupling coefficient(AC),42 of the 91 tree species pairs were of the positive coupling type and 49 were of the negative coupling type,accounting for 46.15%and 53.85%of the total,respectively.The intensity of corre

关 键 词：石漠化 植物区系 物种多样性 种间联结性 贵州北盘江 

分 类 号：Q948.12[生物学—植物学]