Characteristics of Community Structure in Ergun Meadow Steppe under Different Utilization Types——Use of Power Law

doi:10.11733/j.issn.1007-0435.2011.03.005

Acta Agrestia Sinica ›› 2011, Vol. 19 ›› Issue (3): 388-394.DOI: 10.11733/j.issn.1007-0435.2011.03.005

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Characteristics of Community Structure in Ergun Meadow Steppe under Different Utilization Types——Use of Power Law

LV Jie, CHEN Jun

College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi Province 712100, China

Received:2010-12-29 Revised:2011-03-30 Online:2011-06-15 Published:2011-06-15

不同利用方式下额尔古纳草原群落结构特征的研究——幂乘方法则的应用

吕杰, 陈俊

西北农林科技大学动物科技学院, 陕西杨凌, 712100

通讯作者: 陈俊,E-mail:chen_jun2008@nwsuaf.edu.cn
作者简介:吕杰(1986- ),男,内蒙古呼伦贝尔人,硕士研究生,主要从事旱区草地生态研究,E-mail:worstboy02@163.com
基金资助:
2008引进人才科研启动基金(01140413);农业部公益性行业专项(200903060);国家科技支撑项目(2011BAD17B05)资助

Abstract

Abstract: The spatial distribution,species composition,species diversity,utilization types of both mowing and grazing were studied quantitatively in Ergun meadow steppe of Hulunbeier,Inner Mongolia Autonomous Region.Results showed that composing plant species in the mowing and grazing meadow steppes followed the power law.There was a stronger spatial heterogeneity in the meadow steppes under two different use patterns than in the random distribution.The number of species,species diversity index(H′),evenness index(J′) and spatial heterogeneity index of the whole community(δ_c) on the mowing meadow steppe were all higher than those in the grazing meadow steppe.Indicator plant species of degenerated grassland such as Potentilla verticillatus,Taraxacum officinale and Plantago asiatica increased in the meadow steppe after grazing.Otherwise,only high quality Gramineae plants such as Agropyron cristatum,Bromus inermis and Festuca ovina appeared in the mowing meadow steppe.

Key words: Power law, Mowing meadow steppe, Grazing meadow steppe, Species richness, Species diversity, Spatial heterogeneity

摘要： 利用幂乘方法则定量地探明内蒙古自治区呼伦贝尔额尔古纳草原在刈割和放牧2种利用方式下,植被的空间分布特性及其群落的物种组成、物种多样性等。结果表明:割草地和放牧地的构成植物种对幂乘方法则具有很好的吻合性;2种不同利用方式下的草地均呈现了比随机分布强的空间异质性,且割草地的物种数、物种多样性指数(H′)、均匀度指数(J′)和群落整体的空间异质性指数(δ_c)均大于放牧地;草地在放牧利用后,轮叶委陵菜(Potentilla verticillaris)、蒲公英(Taraxacum officinale)、车前(Plantago asiatica)等退化草地的指标植物种增加,而冰草(Agropyron cristatum)、无芒雀麦(Bromus inermis)和羊茅(Festuca ovina)等禾本科优良牧草只在割草地出现。

关键词: 幂乘方法则, 割草地, 放牧地, 物种数, 物种多样性, 空间异质性

CLC Number:

S812

LV Jie, CHEN Jun. Characteristics of Community Structure in Ergun Meadow Steppe under Different Utilization Types——Use of Power Law[J]. Acta Agrestia Sinica, 2011, 19(3): 388-394.

吕杰, 陈俊. 不同利用方式下额尔古纳草原群落结构特征的研究——幂乘方法则的应用[J]. 草地学报, 2011, 19(3): 388-394.

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Characteristics of Community Structure in Ergun Meadow Steppe under Different Utilization Types——Use of Power Law

不同利用方式下额尔古纳草原群落结构特征的研究——幂乘方法则的应用

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