摘要
外来物种入侵是自然保护区目前面临的重大问题之一。为了探究哪些群落对外来入侵植物抵制作用更强以及群落可入侵性与物种多样性的关系,选取陕西佛坪自然保护区进行群落调查。分别在林下(受干扰较弱)和路边(受干扰较强)生境随机选取2 m×2 m的小样方,调查记录样方中入侵物种、外来物种和本地种的数量;计算物种多样性指数和入侵种多度占总多度比例,并以其表征群落可入侵性;用单因素方差分析对比林下和路边生境可入侵性、用线性回归分析群落可入侵性与物种多样性的相关关系。结果显示,共发现13种外来植物,其中11种属于入侵植物;多种因素影响群落可入侵性,其中群落受到的干扰越强,对入侵物种抵抗力越弱;物种多样性与可入侵性之间没有必然联系。
Biodiversity and the invasion of alien species are the major problems currently facing nature reserves.There are still many controversies in the research on the invasiveness of ecosystems(communities).In order to explore which plant communities are more resistant to invasive alien plants and the relationship between community invasiveness and species diversity,the Shaanxi Foping Nature Reserve was selected for plant community survey.Sample plots with 2 m×2 m were randomly selected in forest(weakly disturbed)and roadside(strongly disturbed)habitats.The number of invasive species,alien species and local species in the plot were investigated and recorded and the species diversity index were calculated.The proportion of invasive species to the total abundance was applied to represent the invasiveness of the community.Single-factor analysis of variance was applied to compare the invasiveness of understory and roadside habitats,and linear regression applied to analyze the correlation between community invasiveness and species diversity.The results showed that a total of 13 species of alien plants were found,11 of which were invasive plants;the plant communities with strong disturbances were highly invasive;and the invasiveness of the communities had no correlation with species diversity.A variety of factors affect the invasiveness of the community.The stronger the disturbance the community is,the weaker the resistance to invasive species.There is no necessary connection between species diversity and invasibility.
作者
刘红彩
李永宝
冯水园
王纳
LIU Hong-cai;LI Yong-bao;FENG Shui-yuan;WANG Na(Administration Bureau of Foping National Nature Reserve, Foping, Shaanxi 723400)
出处
《陕西林业科技》
2021年第3期30-34,共5页
Shaanxi Forest Science and Technology
关键词
入侵物种
可入侵性
干扰
物种多样性
佛坪自然保护区
Disturbance
invasive species
invasibility
species diversity
Foping Nature Reserve