文献类型：期刊文献

中文题名：海南岛霸王岭陆均松天然群落物种多样性及地形因子的解释

英文题名：Effects of topographical factors on species diversity across Dacrydium pectinatum natural community in Hainan Island

作者：刘浩栋[1] 陈巧[1] 徐志扬[2] 刘洋[1] 姜怡[1] 陈永富[1]

第一作者：刘浩栋

机构：[1]中国林业科学研究院资源信息研究所,北京100091;[2]国家林业和草原局华东调查规划设计院,杭州321000

年份：2020

卷号：0

期号：2

起止页码：394-403

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：中央级公益性科研院所基本科研业务费专项资金(CAFBB2017ZB004)资助.

语种：中文

中文关键词：热带山地雨林;物种多样性;地形因子;物种-环境关系;冗余分析

外文关键词：tropical mountain rainforest;species diversity;topographic factor;species-environment relationship;redundancy analysis

分类号：S718.5

摘要：环境因素的筛选对物种多样性格局的形成具有重要影响,分析物种多样性-环境关系对于森林的可持续经营具有重要意义。本研究以海南岛霸王岭陆均松(Dacrydium pectinatum)天然群落为对象,通过样方取样方法获取物种多度数据,从物种丰富度、α多样性指数、优势种群空间格局及种间关联性等方面分析了群落特征,并通过物种多度矩阵与地形因子矩阵建立RDA模型,旨在分析该群落物种多样性现状,探讨影响物种分布的可能因素,并提出保护对策。结果表明:群落内乔木有187种,灌木39种,草本36种;α多样性指数表现为乔木层>灌木层>草本层的趋势,且远高于中高纬度的森林群落,但均匀度较低,群落内多为小密度种群,各种群的重要值均较低,少有占绝对优势地位的树种。10种优势种群均表现为集群分布,且聚集强度和种间关联性关系密切。Spearman分析表明,霸王岭陆均松天然群落的结构及多样性不稳定,未来的演替过程中可能会出现激烈的种间竞争和频繁的物种更替现象。RDA模型结果显示,冠层郁闭度、海拔和坡向是解释该研究区物种分布的主要驱动因素,冠层郁闭度的影响作用最显著。鉴于此,针对该研究区域的物种多样性现状及物种-环境关系,采取人工辅助措施如开辟林窗增加光的利用率,合理疏伐提高幼苗幼树成活率,以达到多样性保护的目的。
Environmental filters play a crucial role in the formation of species diversity patterns.Exploring the relationship between species distribution and environmental factors are important for reasonable management of forests.In this study,we analyzed species abundance,αdiversity index,dominant population spatial pattern,and interspecific association with thirty Dacrydium pectinatum fixed plots in Bawangling National Nature Reserve,Hainan Island.A species-environment relationship model(redundancy analysis,RDA)was built through species abundance data and topographic factors data.The results showed that D.pectinatum natural community had a rich species pool,including 187 tree species,39 shrub species,and 36 herb species.The diversity index exhibited the pattern of tree layer>shrub layer>herbaceous layer,and was significantly higher than the mid-high latitude forest community.The evenness index was low.The species were mostly small-density populations.The importance values of all populations were low,with few dominant species.In addition,10 dominant populations exhibited a pattern of cluster distribution,and their aggregate intensity and interspecific association were closely related.Results of Spearman analysis showed that the structure and diversity of the natural D.pectinatum community in Bawangling were unstable.There might be intense interspecific competition and frequent species turnover in the future succession.The RDA model results showed that canopy density,elevation and slope aspect were the primary factors affecting species distribution,with dominant effects of canopy density.Our results suggest that some human-assisted measures can be adopted for biodiversity conservation,such as creating forest gaps to increase light utilization rate and reasonable thinning to increase seedling survival.