文章摘要
余轩, 王兴, 吴婷, 王启学, 马昀, 谢莉, 宋乃平.围封对荒漠草原物种多样性和功能多样性的影响[J].水土保持学报,2021,35(6):243~250
围封对荒漠草原物种多样性和功能多样性的影响
Effects of Enclosure on Species Diversity and Functional Diversity of Desert Steppe
投稿时间:2021-05-24  
DOI:10.13870/j.cnki.stbcxb.2021.06.033
中文关键词: 荒漠草原  土壤  物种多样性  功能多样性
英文关键词: desert steppe  soil  species diversity  functional diversity
基金项目:宁夏自然科学基金项目(2021AAC03015);宁夏青年科技人才托举工程(第五批)项目;宁夏农业科技资助创新项目(NGSB-2021-14-03)
作者单位E-mail
余轩1,2, 王兴1,2, 吴婷1,2, 王启学1,2, 马昀1,2, 谢莉1,2, 宋乃平1,2 1. 宁夏大学西北土地退化与生态系统恢复国家重点实验室培养基地, 银川 750021

2. 宁夏大学西北退化生态系统恢复与重建教育部重点实验室
, 银川 750021 
Songnp@163.com 
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中文摘要:
      为揭示荒漠草原区域围封对不同土壤生境物种多样性和功能多样性的影响,以荒漠草原不同土壤生境下围封(15年、10年、6年)和放牧(15年、6年、5年)的草地植物群落为研究对象,基于方差分析和主成分分析的基础上,通过函数拟合分析,探讨植物物种多样性与功能多样性之间的关系。结果表明:(1)围封相对于自由放牧条件,灰钙土生境植物功能多样性显著增加(P<0.05)。随着封育年限的增加,物种多样性呈显著降低趋势(P<0.05),功能多样性未发生显著变化(P>0.05);风沙土生境植物功能多样性和物种多样性未发生显著变化(P>0.05)。(2)功能离散度表征的功能多样性与物种丰富度关系可用二次多项式Y=aX2+bX+c形式表示,随着封育年限的增加,二者的相关系数在灰钙土和风沙土生境均呈增加趋势。荒漠草原物种多样性与功能多样性整体正相关,且符合二次函数关系,物种多样性可以用来反映植物群落功能多样性的水平高低,但这种替代作用受封育年限和放牧的影响,随着封育年限增加,物种多样性反映功能多样性水平的能力增加,在未来荒漠草原多样性与生态系统功能关系及维持机制中,需要同时考虑多样性的多维度特征以及不同土壤生境类型。
英文摘要:
      Species diversity and functional diversity are the hot issues in ecology. The research on the relationship between them is the key to understand the function and process of community ecosystem. Based on variance analysis and principal component analysis, the relationship between plant species diversity and functional diversity was studied by using the function fitting analysis. The results showed that: (1) The vegetation functional diversity of limestone soil increased significantly (P<0.05) compared with the free grazing conditions. With the increase of the enclosure period, species diversity decreased significantly (P<0.05). The functional diversity did not change significantly (P>0.05). The plant functional diversity and species diversity in the aeolian soil area did not change significantly (P>0.05). (2) The relationship between functional diversity and species richness could be described by a quadratic polynomial Y=aX2+bX+c. With the increase of the enclosure period, the correlation coefficient of the two factors increased in both habitats of limestone soil and aeolian soil. In conclusion, the species diversity was positively correlated with the functional diversity in desert steppe, showing aquadratic function relationship. The species diversity could be used to reflect the level of functional diversity of plant community, but the replacement effect was affected by the period of enclosure and grazing. With the increase of the enclosure period, the ability of species diversity to reflect functional diversity level increased. In the future, the multi-dimensional characteristics of diversity and different soil habitat types should be considered to maintain the relationship mechanism between diversity and ecosystem function.
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