草业学报2017，Vol.26Issue(7)：35-44,10.DOI:10.11686/cyxb2017015
河北省森林草原区草本植物物种多样性和功能多样性
Herbaceous plant species diversity and functional diversity in the forest-steppe zone of Hebei, China
摘要
Abstract
Understanding the relationships between environmental/soil factors and plant species diversity and functional diversity is useful for identifying which factors have the strongest effects on plant communities.In this study,we first studied the relationships between different components of herbaceous plant species diversity (species richness,Shannon-Wiener diversity,and Pielou evenness) and functional diversity indices (functional richness,functional evenness,and functional dispersion).Then,we used methods of analysis of similarities (ANOSIM) and redundancy analysis to explore their variation across three vegetation types (grassland,shrub,and natural secondary forest) and different environmental gradients.The results showed that species richness and Shannon-Wiener diversity were significantly higher in grassland than in shrub and natural secondary forest (P＜0.05);however,the lowest functional richness was in grassland (P＜0.05) and the lowest functional evenness and functional dispersion were in shrub forests (P＜0.05).There was no significant difference in Pielou evenness among the three vegetation types (P＞0.05).Functional richness was negatively related to species richness and Shannon-Wiener diversity (P＜0.01).Functional dispersion was significantly positively correlated with species evenness (P＜0.01),whereas functional evenness had a non-significant correlation with all species diversity indices (P＞0.05).The main factors affecting species diversity were soil water content,soil organic matter,soil pH,soil total nitrogen content,and aspect.The main factors correlated with functional diversity were soil organic matter,soil depth,soil water content,and altitude.Consequently,soil factors were the vital determinants of plant species diversity and functional diversity in the study area,and accounted for 29.1％ and 29.8％ of the total variance explained by environmental factors,respectively.The results showed that herbaceous plant species diversity and functional diversity varied independently in the study area.Species diversity was mainly determined by resource availability,whereas functional diversity was mainly related to niche differentiation (the effects of both environmental filters and species interactions).关键词
物种多样性/功能多样性/环境因子/植被类型/因子分解Key words
species diversity/functional diversity/environmental factors/vegetation types/variation partitioning引用本文复制引用
葛兆轩,孙国龙,袁业,黄选瑞,张志东..河北省森林草原区草本植物物种多样性和功能多样性[J].草业学报,2017,26(7):35-44,10.基金项目
国家自然科学基金项目(31370636)和林业公益性行业科研专项(20150430304)资助. （31370636）
