张家界砂岩峰林不同海拔林下植物多样性及其与土壤因子的关系  

Understory plant diversity of Zhangjiajie sandstone peak forest at different elevations and its relationship with soil factors.

作　　者：黄炎根 李丽 戴兴安[1,2,3] HUANG Yangen;LI Li;DAI Xing’an(College of Landscape Architecture,Central South University of Forestry and Technology,Changsha 410004,China;Hunan Big Data Engineering Technology Research Center of Natural Protected Areas Landscape Resources,Central South University of Forestry and Technology,Changsha 410004,China;Institute of Urban and Rural Landscape Ecology Research,Central South University of Forestry and Technology,Changsha 410004,China)

机构地区：[1]中南林业科技大学风景园林学院,长沙410004 [2]中南林业科技大学湖南省自然保护地风景资源大数据工程技术研究中心,长沙410004 [3]中南林业科技大学城乡景观生态研究所,长沙410004

出　　处：《生态学杂志》2023年第10期2469-2476,共8页Chinese Journal of Ecology

基　　金：国家林业局重点学科(林人发[2016]21号);湖南省“双一流”培育学科(湘教通[2018]469号)资助。

摘　　要：林下植物多样性的海拔分异格局及其与土壤因子的关系是森林生态系统多样性研究的重要方面。以砂岩峰林区张家界国家森林公园为对象,研究了不同海拔(400~600、600~800、800~1000、1000~1220 m)林下植物多样性与土壤因子性质以及二者间的关系。结果表明:(1)不同海拔灌草层重要值最高的物种不同,1000~1220 m海拔林下植物组成最丰富,400~600 m海拔最贫乏;(2)不同海拔灌草层的多样性指数H、丰富度指数D具有显著差异(P<0.05),而优势度指数H'、均匀度指数Jsw无显著差异(P>0.05);(3)不同海拔土壤全磷、全镁和全钙具有显著差异(P<0.05),土壤pH值、全钾、氮磷比、全氮、碳磷比、全碳和碳氮比差异均不显著(P>0.05);(4)海拔和土壤含碳量是影响草本多样性分异特征的主要环境因子,而灌木多样性受环境因子影响不明显。研究表明,林下植物多样性与环境因子存在一定的相关性,为砂岩峰林区物种多样性的研究提供了新的思考。The elevational differentiation pattern of understory plant diversity and its relationship with soil factors are vital for diversity research of forests.We examined understory plant diversity and soil factors at different elevations(400-600,600-800,800-1000,and 1000-1220 m)and their relationship in a sandstone peak forest in the Zhangjiajie National Forest Park.The results showed that:(1)species with the highest importance values in the shrub and herbaceous layers differed among elevations,with the richest understory species in the 1000-1220 m elevation and the poorest in the 400-600 m elevation;(2)the diversity index H and richness index D of the shrub and herbaceous layers differed significantly among elevations(P<0.05),while the dominance index H'and uniformity index Jsw were not significantly different(P>0.05);(3)total phosphorus(TP),magnesium(TMg),and calcium(TCa)contents were significantly different(P<0.05),while soil pH,total potassium(TK),total nitrogen(TN),total carbon(TC),N/P,C/P,and C/N ratios were not significantly different(P>0.05)among elevations;(4)Elevation and soil C content were the main environmental factors affecting herbaceous diversity differentiation,but shrub diversity was not affected by environmental factors.Our results indicated a certain correlation between understory plant diversity and environmental factors,and provided a new consideration for the study of species diversity in the sandstone peak forest area.

关 键 词：砂岩峰林 海拔梯度 林下植物多样性 土壤因子 冗余分析 

分 类 号：S718.5[农业科学—林学]