广西植物2025，Vol.45Issue(3)：606-618,13.DOI:10.11931/guihaia.gxzw202402004
热带岩溶森林内露石表面微生境及其殖居植物
Microhabitats and their colonized plants on rock outcrop surfaces in tropical karst forest
摘要
Abstract
Rock outcrop is a typical feature of karst ecosystem,on which there are complex microhabitats and various colonized plants,but the relationship between these colonized plants and microhabitats is not clear.Taking a tropical seasonal humid forest in Xishuangbanna as the research object in this study,we measured the morphological characteristics and external environmental factors of 586 microhabitats on rock outcrops surface.All colonized vascular species on these microhabitats were identified and counted.Then,Pearson correlation analysis and redundancy analysis(RDA)were used to reveal the relationship between microhabitats(including morphological characteristics and environmental factors)and vascular plants richness.The results were as follows:(1)In tropical karst forest,the microhabitat characteristic such as volume[(5 148.33±31 501.92)cm3]and area[(532.28±1 575.10)cm2]had great variability.(2)A total of 1 518 trees,shrubs and herbs of 90 species belonging to 82 genera and 44 families were recorded in all microhabitats,and preferential species that dominants on karst limestone accounted for 35.6％.(3)The area size and soil depth of microhabitat could explain more than 70％of species composition and colonized plants richness in RDA model.(4)The species-area relationship between the richness of the colonized plants and the area of rock outcrop microhabitats showed an obvious exponential decay.In conclusion,microhabitats on rock outcrops in the tropical karst forest is highly heterogeneous,the area size and soil depth are the key factors affecting plant colonization,and the species-area relationship dominates the species richness pattern on rock outcrops microhabitats.关键词
岩溶/露石/微生境/生境异质性/岩溶特征种/种-面积关系Key words
karst/rock outcrop/microhabitat/habitat heterogeneity/karst characteristic species/species-area relationship分类
农业科技引用本文复制引用
兰亚,郭艺博,袁闯,沈有信..热带岩溶森林内露石表面微生境及其殖居植物[J].广西植物,2025,45(3):606-618,13.基金项目
国家自然科学基金(32101380). （32101380）
