生态学报2026，Vol.46Issue(6)：2899-2912,14.DOI:10.20103/j.stxb.202505211255
雅砻江干热河谷五小叶槭种群结构及群落物种多样性特征
Study on the population structure and community species diversity of Acer pentaphyllum in the Aird-hot Valley of Yalong River
摘要
Abstract
To investigate the population structure and community characteristics of Acer pentaphyllum,a plant species with extremely small populations,this study clarifies its resource status,identifies the causes of species endangerment,and provides a scientific basis for optimizing conservation strategies.In this work,eight representative and concentrated A.pentaphyllum communities in the Yalong River Basin were selected as research objects(located in Muhui Village,Luke Village,Rigang Village,Riga Village,Yageng Village,Diaoqiao Village,shady slope of Diaoqiao Village,and Nianjingfang Village,respectively),and the population structure,community diversity characteristics and soil chemical properties of these objects were investigated using a typical sampling method.The correlation between the three indices was explored through Pearson test,and the effects of soil properties on the diversity characteristics of A.pentaphyllum communities were evaluated using linear mixed effects models(LMMs).The results showed that:(1)The population size of A.pentaphyllum showed a"reversed J type"structure,with the highest proportion of individuals at level I accounting for 82.99％of the total population,and the survival curve of the population tended more towards the Deevey-Ⅲ type;(2)A total of 68 plant species belonging to 64 genera and 40 families were recorded.Leguminosae and Compositae had the highest species richness,followed by Labiatae,Rosaceae,and Polygonaceae;(3)The Simpson index,Shannon-Wiener index,and Patrick index were generally higher in the shrub layer than in the herb layer,and the highest values of all three indices across communities were consistently observed in the Rigang Village community;(4)The Sorensen index of different A.pentaphyllum communities ranges from 0.355 to 0.826,with the highest proportion of relatively similar performance among different communities;(5)There is a significant correlation(P＜0.05)between soil moisture content and organic matter content with both the number of class Ⅰ individuals and community diversity indices;(6)The R2 decomposition of the marginal effects of LMMs indicates that soil moisture content and organic matter content have relatively high explanatory variance for the diversity characteristics of the shrub layer community,while organic matter and total nitrogen content have relatively high explanatory variance for the diversity characteristics of the herb layer.Thus,the size structure of A.pentaphyllum population in the dry-hot valley of the Yalong River exhibited a growing trend,but communities were characterized by low species richness,simple species composition,and high inter-community species similarity.Conservation efforts should prioritize the holistic protection of the community habitat,improving soil environmental management to enhance population and community stability.关键词
五小叶槭/极小种群/种群结构/物种多样性/土壤化学性质Key words
Acer pentaphyllum/minimal population/population structure/species diversity/soil chemical property引用本文复制引用
王莉,吕宸,李慧超,汪万江,邱千春,刘涛,黎力乙,马文宝..雅砻江干热河谷五小叶槭种群结构及群落物种多样性特征[J].生态学报,2026,46(6):2899-2912,14.基金项目
成都勘测设计研究院有限公司横向科研委托项目(CD2C20221029) （CD2C20221029）
四川省自然科学基金项目(2022NSFSC0136) （2022NSFSC0136）
