The relationship between species diversity and ecosystem function (productivity) of the late Middle Permian brachiopods community at the region of Hechuan,Chongqing,China  

作　　者：ZENG Yong JIANG LiJun KE Yan LU Qian ZHAO Li LIANG JiaDong HU Han LINGHU Bo 

机构地区：[1]School of Resource and Earth Science,China University of Mining and Technology,Xuzhou 221116,China [2]State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China

出　　处：《Science China Earth Sciences》2012年第8期1248-1254,共7页中国科学（地球科学英文版）

基　　金：supported by State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology,CAS) (Grant No.123115);the Fundamental Research Funds for the Central Universities"(Grant No.2010LKDZ01)

摘　　要：The relationship between species diversity and ecosystem function is a hot topic in ecology and environics. This paper investi- gates the evolution of diversity of the late Middle Permian brachiopods community in Hechuan, Chongqing, China, and dis- cusses the relationship between species diversity and community productivity in terms of the geohistorical development. This paper shows that the species diversity is externalized by several indexes, and the relationship between diversity and productiv- ity is too complex to be described by a single assumption. The relationship between species diversity and community produc- tivity is restricted by environment and community evolution. When the community succeeds normally, the relationship be- tween species richness index, species diversity index, and species evenness index to productivity is in linear dependence rela- tion to each other, which is met with the third assumption. But, when the environment interference surpasses the beating capa- bility of the community, not only the community succession will be terminated and be replaced by another one, but also the relationship between species richness index, species diversity index, and species evenness index to productivity is also in- versed to negative correlation by the interference from environment. Only the relationship between ecological dominance and productivity is in linear dependence relation to each other and approximately met with the third assumption. It is illustrated that the assumption that the productivity is in linear dependence relation with diversity should be established on the presupposition that the community succession is normal.The relationship between species diversity and ecosystem function is a hot topic in ecology and environics.This paper investi-gates the evolution of diversity of the late Middle Permian brachiopods community in Hechuan,Chongqing,China,and dis-cusses the relationship between species diversity and community productivity in terms of the geohistorical development.This paper shows that the species diversity is externalized by several indexes,and the relationship between diversity and productiv-ity is too complex to be described by a single assumption.The relationship between species diversity and community produc-tivity is restricted by environment and community evolution.When the community succeeds normally,the relationship be-tween species richness index,species diversity index,and species evenness index to productivity is in linear dependence rela-tion to each other,which is met with the third assumption.But,when the environment interference surpasses the bearing capa-bility of the community,not only the community succession will be terminated and be replaced by another one,but also the relationship between species richness index,species diversity index,and species evenness index to productivity is also in-versed to negative correlation by the interference from environment.Only the relationship between ecological dominance and productivity is in linear dependence relation to each other and approximately met with the third assumption.It is illustrated that the assumption that the productivity is in linear dependence relation with diversity should be established on the presupposition that the community succession is normal.

关 键 词：Hechuan area in Chongqing China late Middle Permian brachiopods community species diversity PRODUCTIVITY 

分 类 号：Q16[生物学—普通生物学] S718.54[农业科学—林学]