期刊文献+

科尔沁沙地不同沙漠化阶段植物种多样性与沙地草场地上生物量关系研究 预览 被引量:16

Relationship of ground biomass and plant diversity at different desertification stages in Horqin sandy grassland
在线阅读 下载PDF
收藏 分享 导出
摘要 论文从植被的种丰富度和功能多样性两个方面研究不同沙漠化阶段科尔沁沙地植物种多样性与沙地草场地上生物量的关系.相关分析表明,在科尔沁沙地不同沙漠化阶段,植物种多样性和沙地草场地上生物量的关系与多样性指数计算的基本单位有关.研究结果显示:①依据一年生、多年生和灌木等生活型为划分标准的功能多样性,在固定沙丘、半流动沙丘和流动沙丘阶段与沙地草场地上生物量的关系最密切,关联系数分别为-0.534、-0.574和-0.431.以豆科植物、C3植物和C4植物为划分标准的功能多样性,在半固定沙丘阶段与沙地草场地上生物量的关系最密切,关联系数为0.722.②在不同的沙漠化阶段,生活型多样性与地上生物量的关系呈负相关.说明在不同沙漠化程度的草场中,植物生活型组成的不均匀,有利于提高沙地草场地上生物量.③从不同生活型在各个沙漠化阶段中的种丰富度特征来看,一年生植物最高,多年生植物次之,灌木最低,平均值分别为9(±6.0)、3(±2.6)和1.8(±1.0),说明一年生植物在沙地植被组成中占主导地位.同时,研究结果表明,在不同沙漠化阶段中,以豆科植物、C3植物和C4植物划分的功能类型组的平均重要值以C4植物最高,C3植物次之,豆科最低,分别为48(±12.3)、39.7(±3.6)和12.3(±14.3),说明C4类植物在科尔沁沙地植被中的适应性最强. This paper mainly studied the relationship of the species biodiversity and the ground biomass at different desertification stages in Horqin sandy grassland in terms of species richness and function diversity.Correlative analysis suggested that the relationship of ground biomass and plant diversity was related to the basic unit of calculated biodiversity indices.Further research drew the following conclusions:(1)the function diversity,based on the life form classification of annuals,perennials and shrubs,had a close relationship with ground biomass at the fixed dune,semi-fixed dune and mobile dune stages.The correlative coefficients were-0.534,-0.574,and-0.431respectively.Functional diversity,based on the classification of legume,C 3 and C 4 plant species,had a good correlativity with the ground biomass at semi-fixed dune stage and the correlative coefficient was0.722.(2)The life form diversity had a negative relationship with ground biomass at the different desertification stages,which indicated that the lower evenness of life form composition of sandy land vegetation should increase ground biomass.(3)According to the species richness change traits of the different life form categories at the different desertification stages,the annuals had highest occupation frequency,perennials and shrubs in turn and the richness reached to9(±6.0),3(±2.6)and1.8(±1.0)respectively.Meanwhile,the average important values of life form showed that C 4 plant had the best fitness among C 4 ,C 3 and legume plant and the value were48(±12.3),39.7(±3.6)and12.3(±14.3)respectively.
作者 常学礼 鲁春霞 高玉葆 CHANG Xue-li 1,2 ,LU Chun-xia 3 ,GAO Yu-bao 1 (1.Life Sciences College,Nankai University,Tianjing300071,China;2.Department of Geography and Tour,Yantai Normal College,Yantai264025,China;3.Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing100101,China)
出处 《自然资源学报》 CSSCI CSCD 北大核心 2003年第4期 475-482,共8页 Journal of Natural Resources
基金 国家重点基础研究发展计划(973计划),中国科学院知识创新工程项目
关键词 功能多样性 生活型 地上生物量 沙漠化阶段 科尔沁沙地 functional diversity life form ground biomass desertification stage Horqin sandy grassland
  • 相关文献

参考文献16

二级参考文献21

共引文献79

同被引文献248

引证文献16

二级引证文献145

投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈