藤枣生境地木本植物种间关联性与群落稳定性  

Interspecific association of woody plant species and community stability in the Eleutharrhena macrocarpa habitat

作　　者：李帅锋[1,2] 郎学东 黄小波[1,2] 刘万德 苏建荣[1,2] 徐崇华 李智宏[3] 徐凡迪 Shuaifeng Li;Xuedong Lang;Xiaobo Huang;Wande Liu;Jianrong Su;Chonghua Xu;ZhihongLi;Fandi Xu(Research Institute of Resource Insects,Chinese Academy of Forestry,Kunming 650224;The Puer Forest Ecosystem Research Station,National Forestry and Grassland Administration of China,Kunming 650224;Administration of Taiyanghe Provincial Nature Reserve,Puer,Yunnan 665000;Yunnan Agricultural University,Kunming 650201)

机构地区：[1]中国林业科学研究院资源昆虫研究所,昆明650224 [2]国家林业与草原局普洱森林生态系统国家定位观测研究站,昆明650224 [3]云南省太阳河自然保护区管理局,云南普洱665000 [4]云南农业大学,昆明650201

出　　处：《生物多样性》2020年第3期350-357,共8页Biodiversity Science

基　　金：国家重点研发计划(2016YFC0503100)“极小种群野生植物就地保护及生境恢复技术研究与示范”课题(2016YFC0503103);中国林业科学研究院中央级公益性科研院所基本科研业务费专项(CAFYBB2017MB013,CAFYBB2017ZX002-4);云南省环境保护专项国家I级保护植物藤枣的致濒机制及种群扩繁技术研究(530702001712004)。

摘　　要：藤枣(Eleutharrhena macrocarpa)是国家Ⅰ级重点保护植物,属于木质藤本植物,野外数量稀少,种群更新困难。本文通过分析云南省太阳河自然保护区藤枣生境地热带季节雨林乔木层与灌木层中木本植物种群的种间关联性以及群落的稳定性,揭示种间关联性在藤枣种群濒危机制形成中的作用,为极小种群的保护提供科学依据。结果表明:藤枣生境地群落乔木层总体联结性VR(方差比率)>1,检验统计量W>χ0.05(29),灌木层种群总体联结性VR<1,χ0.95(29)<W<χ0.05(29),乔木层和灌木层分别呈显著正相关和不显著负相关。x2检验显示乔木层与灌木层中无联结的种对占多数,其正负关联比分别是0.238和0.279,联结系数显示显著和极显著的负联结种对要多于正联结的种对;Pearson相关系数显示乔木层与灌木层正负关联比分别是0.376和0.511,绝大多数种对的联结关系未达到显著水平,种对间的独立性相对较强。藤枣与其他植物种群之间对生境有相似的适宜生态位,通过共同利用资源而共存,在灌木层则面临较强的种间竞争。藤枣生境地群落稳定性交点坐标为(33.92,66.07),显示群落具有较好的稳定性,而群落建群种与其他种对存在较强的种间竞争,反映热带季节雨林的脆弱性,因此生境地群落的严格保护对藤枣种群的更新和生物多样性保育至关重要。Eleutharrhena macrocarpa,an endangered liana species,experiences population regeneration barriers in natural environments.Due to its endangered status,this species has been heavily researched to understand the mechanisms behind its rarity.In this study,we studied E.macrocarpa populations in the tropical seasonal rainforest of Taiyanghe Provincial Nature Reserve in Pu’er City,Yunnan Province to find successful protecting methods for a wild plant species with extremely small populations.Utilizing various community stability and interspecific competition metrics(the Godron stability index,Chi-square analysis,Pearson correlation),the results showed that the woody plant populatios of tree layer indicated significant positive correlation based on the value of variance ratio more than one(test statistic W>χ0.05(29)).Similarly,the woody plant populations of shrub layer indicated that no significant negative correlation and the variance ratio is less than 1(χ0.95(29)<W<χ0.05(29)).Further,Chi-square test indicated that no association species pairs represented the most populations in the tree and shrub layer,and the ratios of positive and negative correlations were 0.238 and 0.279,respectively.Simultaneously,association coefficient suggested that significant and extremely significant negative species pairs were more than positive species pairs,while Pearson correlation coefficient indicated that the ratios of the positive and negative correlation were 0.376 and 0.511,respectively.We found that the association relationship of most species pairs showed no significant correlation,which mean a relative stronger interspecific independence.Eleutharrhena macroarpa population has similar adaptive niche with most woody plant populations in the tree layer,and they survived together through effective resource utilization.However,Eleutharrhena macrocarpa population had stronger competition with some species in the shrub layer.In addition,intersection point of community stability(33.92,66.07)in the vegetative community of Eleutharr

关 键 词：热带季节雨林 方差比率 种间联结 种间相关 Godron稳定性指数 

分 类 号：Q948[生物学—植物学]