摘要
【目的】探究藤本植物过度干扰对低海拔次生林群落特征的影响,为是否需要对五指山地区的藤本植物进行防治提供参考。【方法】以五指山市低海拔次生林几乎被藤本植物覆盖的区域为研究对象,采用样方法分别对未伐藤、伐藤2 a、伐藤4 a、对照4种处理的样地进行植被调查,研究其物种多样性与群落特征。【结果】1)研究区域次生林群落乔、灌、草层共出现264种植物,隶属于119科205属,4种次生林群落的攀援藤本和匍匐藤本中,金钟藤、葛、榄形风车子重要值均较大,仅对照中榄形风车子重要值较小,伐藤后重要值最大的藤本植物由金钟藤变为葛。2)伐藤后乔木层冠幅、胸径增长显著;灌木层的盖度、冠幅、多度出现显著增长;草本层的多度,匍匐藤本的径粗、多度,攀援藤本的地径、多度则出现了先增加后减少的趋势。3)随着伐藤后恢复时间的增长,阳性树种的重要值之和逐渐降低。4)伐藤后4种次生林群落乔木层、灌木层、草本层、匍匐藤本、攀援藤本的物种丰富度指数、多样性指数均出现显著增长。5)相关性分析表明,攀援藤本的径粗和攀爬高度与草本层的物种多样性指数、丰富度指数呈正相关关系,攀援藤本的多度则对乔灌木的物种ShannonWienner指数、Pielou指数表现为抑制作用。【结论】藤本植物是五指山地区低海拔次生林群落中不可缺少的一部分,控制其多度有助于提高次生林群落物种丰富度和多样性,有利于推动该地区次生林群落向顶级群落演替。
【Objective】To explore the influence of excessive interference of liana on the community characteristics of secondary forest at low altitude,and to provide reference for the prevention and control of liana in Wuzhishan area.【Method】The area of the low altitude secondary forest of Wuzhishan city covered by lianas was taken as the research object.The vegetation of four sample plots(including lianas area without harvet,lianas area after two years of harvest,lianas area after 4 years of harvest,and control plot)were investigated by the sampling method,and then study the species diversity and community characteristics of them.【Result】The results demonstrated that:1)There are 264 species of plants in the secondary forest community of the study area,belonging to 119 families and 205 genera.Among the climbing lianas and crawling lianas of the four secondary forest communities,the important values index of Merremia boisiana,Pueraria lobataand Combretum olivaeformeare relatively large.Only the important value index related to Combretum olivaeformein the control group is small.The lianas with the largest importance index changed from Merremia boisiana to Pueraria lobataafter eliminate lianas.2)After eliminate lianas,there is a significant increase in diameter,breast height and tree crown width.shrub coverage,shrub crown and shrub abundance increased significantly;herb abundance,crawling lianadiameter and crawl liana abundance,and climbing liana ground diameter and climbing liana abundance increased firstly and then decreased.3)With the increase of recovery time after eliminate lianas,the sum of important values of positive species decreased gradually.4)Richness,diversity and evenness indexes of arbor layer,shrub layer,herb layer,crawl liana,and climbing liana increased significantly after eliminatelianas.5)The correlation analysis showed that climbing liana ground diameter and climbing liana height promoted the diversity,richness index of herb layer,while climbing liana abundance inhibited the Shannon Wiener and
作者
林承博
陈国德
张何信
符生波
杜尚嘉
童思远
余雪标
LIN Chengbo;CHEN Guode;ZHANG Hexin;FU Shengbo;DU Shangjia;TONG Siyuan;YU Xuebiao(College of Forestry,Hainan University,Haikou 570203,Hainan,China;Hainan Academy of Forestry,Haikou 571100,Hainan,China)
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2020年第10期127-136,共10页
Journal of Central South University of Forestry & Technology
基金
海南省省属科研技术开发专项项目(KYYS-2018-25,SQ2017JSKF0030)。
关键词
次生林群落
伐藤
群落特征
物种多样性
五指山市
secondary forest community
eliminate lianas
community characteristics
species diversity
Wuzhishan city
