摘要
为了探讨西双版纳勐仑林下草本层主要物种间的关系及群落演替趋势,在样方调查基础上,基于生态位宽度、生态位重叠、方差比率法、χ^(2)检验、联结系数、Pearson相关检验及Spearman秩相关检验等方法,分析了西双版纳国家级自然保护区勐仑片区草本层主要物种的生态位和种间联结特征。结果表明:①在104种植物物种中,重要值>1的植物物种有14种。在这14种主要物种中,生态位宽度指数小于5的物种占7.14%,生态位宽度指数大于10的物种占50%;②生态位重叠值(O_(ik))范围为0.00~0.76。其中,O_(ik)>0.50的种对有21对,0.10<O_(ik)≤0.50的有63对,0.00≤O_(ik)≤0.10的有7对;③主要物种间的总体联结性表现为显著正联结。其中,AC≥0.75的种对有9对,AC<-0.75的种对有5对,AC=0的种对有4对,大部分的种对的正负联结并不显著。此研究结果说明了大多数主要物种的种群发展空间较大,有利于植物群落的生存发展,并且勐仑地区草本层植物对各种资源的利用及竞争较小,植物群落结构较为稳定。
In order to investigate the relationship between the main species and the community succession trend in the understory herbaceous layer of Menglun tropical seasonal rainforest in Xishuangbanna,the methods of niche estimation,variance ratio method and Chi-square test were used on the basis of quadrat survey.The niche characteristics and interspecific association characteristics of major species in herbaceous layer in Menglun area were studied by association coefficient,pearson correlation test and Spearman rank correlation test.The results showed that:①Among the 104 plant species,there were 14 plant species with importance value>1.Among the 14 major species,7.14%had niche width index less than 5,and 50%had niche width index more than 10;②Niche overlap value(O_(ik))ranged from 0.00 to 0.76.Among them,21 pairs had O_(ik)>0.50;63 pairs had 0.10<O_(ik)≤0.50;and 7 pairs had 0.00≤O_(ik)≤0.10.③The overall association of major species was significantly positive.Among them,there were 9 species pairs with AC≥0.75,5 species pairs with AC<-0.75,and 4 species pairs with AC=0.The positive and negative association of most species pairs was not significant.The results of this study indicate that the population development space of most major species is large,which is conducive to the survival and development of plant communities,and the herb layer plants in Menglun area had little utilization and competition of various resources,and the plant community structure is relatively stable.
作者
李俊松
万正林
白林忠
孙萍
陈燕旋
Li Junsong;Wan Zhenglin;Bai Linzhong;Sun Ping;Chen Yanxuan(Menglun Institute of Management and Protection,Xishuangbanna National Nature Reserve,Mengla,Yunnan 666300,China;Institute of Highland Forest Science,Chinese Academy of Forestry,Kunming,Yunnan 650224,China)
出处
《绿色科技》
2023年第6期1-5,共5页
Journal of Green Science and Technology
基金
中国林业科学研究院中央级公益性科研院所基本科研业务费专项(编号:CAFYBB2020ZA002,CAFYBB2021ZA002)
云南省科技人才与平台计划(编号:202105AC16036)。
关键词
林下草本层
生态位
种间联结
勐仑
Xishuangbanna
Menglun
understory herb layer
ecological niche
interspecific association
