生态环境学报2016，Vol.25Issue(5)：729-736,8.DOI:10.16258/j.cnki.1674-5906.2016.05.001
春季休牧后放牧强度变化对短花针茅荒漠草原主要植物种群空间分布的影响
Effect of Grazing Intensity after Spring Banning Grazing on Spatial Distribution of Dominant Populations inStipa breviflora Desert Steppe
摘要
Abstract
In this paper, we introduced the multi-fractal theory in order to investigate the grazing intensity after banning grazing in spring how to influence the spatial distribution pattern, niche changes and the effects of the individual relations of plant population. The results shown that there was unique multi-fractal characteristics of spatial distribution on Stipa breviflora, Allium polyrhizum and Cleistogenes songorica in each grazing treatment (box-counting dimensionD0 > information dimensionD1 > correlation dimensionD2). PopulationStipa breviflora is mainly affected by the low density distribution (multifractal spectrumΔf < 0), while that ofAllium polyrhizum is mainly influenced by the high density area (Δf > 0), and the dominant factor in the spatial distribution of Cleistogenes songorica turned low-density area (Δf< 0) to a high-density area (Δf > 0). Banning grazing in spring + heavy grazing in summer + moderate grazing in autumn (SA2) led to a more complex spatial distribution relatively to banning grazing in spring + moderate grazing in summer + heavy grazing in autumn (SA1) (a wide multifractal spectrumΔα showed SA2 > SA1). Banning grazing in spring can made niche breadth and individuals competition intensity of populationStipa brevifloraincreased (fractal dimension increased than CK area), and increased the degree of SA2 > SA1. Moreover, increasing of SA1 is benefit to increase the niche breadth and individuals’ competition intensity of populationAllium polyrhizumandCleistogenes songorica(fractal dimension D0,D2 more closed to 2).关键词
荒漠草原/春季休牧/植物种群/空间分布/多重分形理论Key words
desert steppe/banning grazing in spring/plant population/spatial distribution/multi-fractal theory分类
资源环境引用本文复制引用
卫智军,张爽,吕世杰,解云,刘文亭,刘红梅,吴艳玲..春季休牧后放牧强度变化对短花针茅荒漠草原主要植物种群空间分布的影响[J].生态环境学报,2016,25(5):729-736,8.基金项目
国家自然科学基金项目（31460126）；内蒙古自然科学基金项目（2015MS0349）；国家重点基础研究计划项目（2014CB138800）；内蒙古自治区高等学校科学研究项目（NJZC16073）；内蒙古农业大学基础研究项目 （）
