虫害侵扰初期华山松群落草本层生态位特征和种间关系  

Niche Characteristics and Interspecific Relationship of Herbaceous Layer in Pinus armandii Community at the Early Stage of Pest Infestation

作　　者：胡文杰[1] 潘磊[1] 唐万鹏[1] 李欢欢 崔鸿侠[1] 孙亮[1] 宋云瑞 Hu Wenjie;Pan Lei;Tang Wanpeng;Li Huanhuan;Cui Hongxia;Sun Liang;Song Yunrui(Hubei Academy of Forestry,Wuhan 430075,P.R.China)

机构地区：[1]湖北省林业科学研究院,武汉430075

出　　处：《东北林业大学学报》2023年第3期36-40,共5页Journal of Northeast Forestry University

基　　金：神农架林区林业科技计划项目(SAF202108);湖北省林科院科技攻关项目(2021YGG05)。

摘　　要：以受虫害侵扰2 a的华山松(Pinus armandii)群落为研究对象,探究虫害侵扰初期的华山松群落草本层主要物种组成特征及种间相互作用关系。结果表明:虫害侵扰初期华山松群落草本层共有35科65属71种植物,其中石竹科植物和菊科植物在草本层占有优势地位。各主要物种的生态位宽度为1.66~2.31,其中中日金星蕨(Parathelypteris nipponica)、落新妇(Astilbe chinensis)和六叶葎(Galium hoffmeisteri)等生态位宽度较大,表明这些物种的生态适应范围较广。各物种间普遍存在生态位重叠,生态位重叠指数总体均值为0.32,证明草本层植物对资源的利用较为充分。草本层总体联结性表现为不显著负联结关系,说明草本层总体处于不稳定状态。Pearson相关检验和Spearman秩相关检验显示,有显著联结关系的种对数占总种对数的60%以上,且呈负联结状态的种对数多于呈正联结的种对数,表明各物种间存在较为激烈的竞争,种间关系不够协调,未形成稳定的共存关系。随着虫害侵扰和植被自然恢复过程的推进,草本层物种组成及其种间关系将进一步发生变化。Taking Pinus armandii community affected by insect infestation for 2 a as the research object, we investigated the herb layer of niche characteristics and interspecific relationship, the main species composition characteristics and interspecific interaction. The results showed that there were 35 families, 65 genera and 71 species of plants in the herb layer of Pinus armandii community in the early stage of pest infestation, among which Caryophyllaceae and Compositae were dominant. The niche width of the main species ranged from 1.66 to 2.31, among which the niche width of Parathelypteris nipponica, Astilbe chinensis and Galium hoffmeisteri were large, indicating that these species have a wide range of ecological adaptation. There was widespread niche overlap among species, and the overall mean of the niche overlap index was 0.32, which indicating that the herbaceous plants make full use of resources. The overall connectivity of the herbaceous layer was not significantly negative, indicating that the herbaceous layer was in an unstable state. The Pearson correlation test and Spearman rank correlation test showed that the number of species with significant connection accounted for more than 60% of the total species pairs, and the number of species pairs with negative connection was more than that with positive connection. It indicated that there was fierce competition among species, the relationship between species was not coordinated enough, and a stable coexistence relationship was not formed. With the advancement of pest infestation and the natural vegetation restoration, the species composition and interspecific relationship of the herb layer would further change.

关 键 词：华山松 虫害干扰初期 草本层 生态位 种间关系 

分 类 号：Q145.1[生物学—生态学]