文献类型：期刊文献

中文题名：生境异质性对沙冬青群落功能多样性与物种多样性的影响

英文题名：Impact of habitat heterogeneity on the functional diversity and species diversity of Ammopiptanthus mongolicus communities

作者：董雪[1,2,3] 韩春霞[1,2] 王英姿[1,2] 王丹阳[1,2] 刘雅婧[1,2] 牧仁[1,2] 黄雅茹[1,2] 李新乐[1,2] 张景波[1,2] 卢琦[1,2,3]

第一作者：董雪

机构：[1]中国林业科学研究院沙漠林业实验中心三北工程研究院,内蒙古磴口015200;[2]中国林业科学研究院沙漠林业实验中心内蒙古磴口荒漠生态系统定位观测研究站,内蒙古磴口015200;[3]中国林业科学研究院生态保护与修复研究所,北京100091

年份：2025

卷号：45

期号：12

起止页码：105-118

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：;北大核心:【北大核心2023】；

基金：内蒙古自治区自然科学基金项目(2025MS03127);中央引导地方科技发展资金项目(2024ZY0014);国家自然科学基金项目(32101595);中央级公益性科研院所基本科研业务费专项(CAFYBB2021MA006)。

语种：中文

中文关键词：沙冬青;功能性状;物种多样性;功能多样性;生境异质性

外文关键词：Ammopiptanthus mongolicus;functional traits;species diversity;functional diversity;habitat heterogeneity

分类号：S718.54;Q948.1

摘要：【目的】研究植物群落功能性状及其多样性对环境变化的响应,探索不同植物种对环境的适应策略以及群落的构建机制。【方法】以荒漠区唯一常绿阔叶灌木且是第三纪孑遗珍稀濒危保护植物沙冬青Ammopiptanthus mongolicus群落为研究对象,分析异质性荒漠生境(固定沙地、半固定沙地、石质沙地、洪积砾石坡地和盐碱滩地)对群落功能性状及其多样性的影响,探究植物适应策略和生存机制。【结果】乌兰布和沙漠典型植物沙冬青群落内共出现55种植物种,其中灌木层30种,草本层25种,分属13科40属,主要以苋科、豆科、菊科和禾本科为主。群落加权高度、盖度、叶长、叶面积、比叶面积和叶C含量在不同生境类型间均有显著差异,而群落叶N和P含量随着生境类型的变化存在一定的内稳性,即不完全依赖环境,在一定范围内变化,呈相对稳定的状态。沙冬青群落物种所占据的功能空间大小有差异,而功能特征的分异方向和均匀度基本无明显差异,即不同生境类型下沙冬青群落内物种的资源利用效率、种间竞争强度以及生态位重叠程度相近。沙冬青群落功能丰富度指数、功能均匀度指数和Rao二次熵指数均在固定沙地生境类型最大,群落更稳定。功能多样性动态变化主要归因于群落高度、盖度及叶面积、叶C含量的改变。灌木层的物种多样性高于草本层,且功能多样性也相对较高,物种多样性与功能多样性之间存在正相关关系,其中功能丰富度指数、Rao二次熵指数都与物种丰富度、Shannon-Wiener、Simpson多样性指数显著正相关,而与物种均匀度指数关系不显著,但功能离散度指数与物种均匀度指数显著正相关。【结论】沙冬青群落通过调节群落的高度、盖度和叶性状对有限的环境资源进行优化配置来提高在不同生境中的适应能力,了解植物群落功能性状及其整体资源权衡和协变策略,为沙冬青群落生物多样性保护和恢复提供理论依据。
【Objective】To study the response of plant community functional traits and diversity to environmental changes,and to explore the adaptation strategies of different plant species to the environment and the mechanism of community construction.【Method】In this study,Ammopiptanthus mongolicus,the only evergreen broad-leaved shrub and a rare and endangered species of Tertiary relict plant,was selected as the research object.The effects of heterogeneous desert habitats(fixed sand,semi-fixed sand,stony sand,alluvial gravel slope and saline flat land)on the functional traits and diversity of the community were analyzed,and the adaptive strategies and survival mechanisms of the plants were studied.【Result】The results showed that there are 55 plant species in the community,including 30 species in the shrub layer and 25 species in the herbaceous layer,belonging to 13 families and 40 genera,mainly Amaranthaceae,legumes,Compositae and gramineae.The weighted height,coverage,leaf length,leaf area,specific leaf area and leaf C content of the community were significantly different among different habitat types,while the leaf N and P contents at the community level showed a certain internal stability with the changes of habitat types,that is,they were not completely dependent on the environment,but were relatively stable and changed within a certain range.There were differences in the size of functional space occupied by the species in the community,but there was no significant difference in the differentiation direction and uniformity of functional characteristics,that is,the resource use efficiency,interspecific competition intensity and niche overlap of the species in the community were similar under different habitat types.The community functional richness index,functional evenness index and Rao secondary entropy index were the highest in fixed sandy land,and the community was more stable.The dynamic changes in functional diversity are mainly attributed to changes in community height,coverage,plant leaf area and leaf C content.The species diversity of the shrub layer is higher than that of the herbaceous layer,and the functional diversity is also relatively high.There is a positive correlation between species diversity and functional diversity,among which functional richness and Rao quadratic entropy index are significantly positively correlated with species richness,Shannon-Wiener and Simpson diversity index,but not significantly correlated with species evenness index.However,functional divergence is significantly positively correlated with species evenness.【Conclusion】The community improves its adaptability in different habitats by optimizing the allocation of limited environmental resources through adjusting the height,coverage,and leaf traits of the community.Understanding the functional traits of plant communities and their overall resource trade-offs and covariation strategies provides a theoretical basis for the conservation and restoration of biodiversity in the Ammopiptanthus mongolicus community.