广东省雷州半岛风水林斑块的植物多样性  

Plants Diversity of Fengshui Forests in Leizhou Peninsula,Guangdong Province

作　　者：黄锐洲 许涵[2] 刘家辉 马海宾[2] 唐光大[1] Huang Ruizhou;Xu Han;Liu Jiahui;Ma Haibin;Tang Guangda(South China Limestone Plants Research Center,College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou 510642,China;Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou 510520,China)

机构地区：[1]华南农业大学南方石灰岩植物研究中心,林学与风景园林学院,广州510640 [2]中国林业科学研究院热带林业研究所,广州510520

出　　处：《陆地生态系统与保护学报》2023年第4期44-53,共10页Terrestrial Ecosystem and Conservation

基　　金：广东省林业科技创新项目(2018KJCX010);广东省林业局科技项目(2023KJCX001)。

摘　　要：【目的】以雷州半岛的10个风水林为研究对象,系统分析风水林群落的植物多样性,探讨风水林森林斑块面积对物种存留的贡献与影响。【方法】每个风水林建立1个40 m×40 m的样地,分析群落α多样性、β多样性和森林斑块面积对风水林植物多样性的影响。【结果】1)雷州半岛10个风水林中保存着190种植物。乔木层与草本层均由1个或若干优势种与较多的稀有种组成;且均以出现频次为1的物种丰富度比例最高,分别占其物种总丰富度的39.26%与48.48%。2)乔木层与草本层种的Jaccard相似性指数均值仅为31.29%与15.46%,Bray-Curtis相似性指数均值仅为25.62%与11.38%;乔木层与草本层间的物种Jaccard相似性指数与Bray-Curtis相似性指数仅为22.77%与12.12%。3)风水林斑块面积与风水林植物多样性保存水平无显著相关关系,且森林斑块面积对风水林植物乔木层与草本层植物多样性组成的影响相对较小。【结论】虽然雷州半岛风水林保存着丰富的植物,且风水林森林斑块面积大小对其多样性的影响相对较小,但因风水林呈现破碎化,林内大部分植物种类为稀有种,仅有部分种子转化为幼苗,群落的稳定性与抗干扰性相对较弱。【Objective】Ten communities of Fengshui forests were studied to analyze the species diversity systematically,and to explore the contribution and impact of forests patch size to the species conservation on the Leizhou Peninsula of Guangdong Province.【Method】A 40 m×40 m sample plot was established in each Fengshui forest to analyze the alpha diversity,beta diversity of community and the effect of forest patch area on plants diversity.【Result】1)There were 190 species recorded in the 10 Fengshui forests on the Leizhou Peninsula.In the arbor and herb layers,the community of these small Fengshui forest patches consisted mainly of one or several dominant species and numerous rare species.Both the arbor and herb layers had the highest proportion of species with a frequency of 1,which accounted for 39.26%and 48.48%of their respective total richness.2)The mean Jaccard similarity for the species of arbor and herb layer were only 31.29%and 15.46%respectively.Similarly,the mean Bray-Curtis similarity were merely 25.62%and 11.38%among the 10 Fengshui sample plots.The mean Jaccard similarity and the Bray-Curtis similarity of species between the arbor and herb layers were only 22.77%and 12.12%respectively.3)There was no significant correlation between the area of Fengshui forest patches and the level of plant diversity conservation,and the impact of forest patch area on the plants composition of arbor and herb layers in Fengshui forests is relatively small.【Conclusion】Fengshui forests preserved a rich variety of plant species and the size of forest patches had a relatively small impact on their plant diversity,but because they are isolated from each other,most of the species in these forests were rare species,and only a small portion of the seeds developed into seedlings on Leizhou Peninsula.As a result,community stability and resistance to disturbances are relatively weak.

关 键 词：风水林 雷州半岛 物种多样性 

分 类 号：S719[农业科学—林学]