短花针茅荒漠草原建群种空间分布的多重分形研究

发布时间：2018-07-01 18:46

本文选题：荒漠草原 + 放牧强度　；参考：《干旱区资源与环境》2017年04期

【摘要】：短花针茅荒漠草原建群种和优势种不仅具有相对较高的地上现存量,也具有特定且复杂的空间分布区域,其在维护草地植物群落结构和功能的稳定具有重要作用。为探讨建群种空间分布特点及其随放牧强度的变化规律,引入多重分形理论,揭示短花针茅荒漠草原主要植物种群空间分布形式、生态位变化和种内个体关系。结果表明:建群种短花针茅在各放牧强度处理的空间分布均存在特有的多重分形特征。短花针茅空间分布主要受低密度分布区影响,随放牧强度的增加,高密度分布区的作用在加强,其生态位宽度增加,空间分布均匀性增大,个体间的竞争强度增加。多重分形不仅可用于植物种群空间分布研究,其在揭示不同植物种空间分布特异性的同时,能够给出较为丰富的种群生态学信息。
[Abstract]:The species and dominant species of Stipa breviflora desert steppe not only have relatively high aboveground standing stock, but also have special and complex spatial distribution area, which plays an important role in maintaining the stability of grassland plant community structure and function. In order to study the spatial distribution characteristics and the variation law of species with grazing intensity, the multifractal theory was introduced to reveal the spatial distribution form, niche change and individual relationship of main plant populations in Stipa breviflora desert steppe. The results showed that the spatial distribution of Stipa breviflora in different grazing intensity treatments had unique multifractal characteristics. The spatial distribution of Stipa breviflora was mainly affected by the low density distribution area. With the increase of grazing intensity, the effect of high density distribution area was strengthened, the niche width increased, the spatial distribution uniformity increased, and the competition intensity between individuals increased. Multifractal can be used not only to study the spatial distribution of plant population, but also to reveal the spatial distribution specificity of different plant species and to provide abundant information of population ecology.
【作者单位】：内蒙古农业大学理学院;内蒙古农业大学生态环境学院;内蒙古自治区林业科学研究院;内蒙古师范大学生命科学与技术学院;
【基金】：内蒙古自然科学基金项目(2015MS0349) 国家自然科学基金项目(31460126) 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(JC2015002)资助
【分类号】：S812

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