哀牢山亚热带森林内木本植物幼苗叶片数量对虫食强度的影响  

Effects of leaf number of woody seedlings on herbivory intensity in a subtropical forest in Ailao Mountain

作　　者：杨安婷 张翔 王博 YANG Anting;ZHANG Xiang;WANG Bo(School of Resources and Environmental Engineering,Anhui University,Hefei 230601,China;Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration,Anhui University,Hefei 230601,China;Anhui Shengjin Lake Wetland Ecology National Long-Term Scientific Research Base,Dongzhi 247230,Anhui,China)

机构地区：[1]安徽大学资源与环境工程学院,合肥230601 [2]安徽大学湿地生态保护与恢复安徽省重点实验室,合肥230601 [3]安徽升金湖湿地生态学国家长期科研基地,安徽东至247230

出　　处：《生态学杂志》2023年第6期1299-1306,共8页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31971444和32171533)资助。

摘　　要：研究幼苗叶片数量对虫食强度的影响对揭示小尺度上食物丰富度与虫食强度的关系具有重要意义。本研究以哀牢山亚热带森林内的木本植物幼苗为对象,运用线性混合模型和广义线性混合模型研究叶片数量对虫食强度的影响,并比较这种影响在不同季节和物种间的规律是否一致。结果表明:在群落水平上,9月和5月幼苗叶片数量和虫食频度(虫食叶片数/总叶片数×100%)之间存在显著U型相关,12月幼苗叶片数量与虫食频度呈显著单峰型相关,而幼苗叶片数量对虫食率(虫食叶面积/总叶面积×100%)的影响在3个季节均不显著;在物种水平上,幼苗叶片数量对虫食强度的影响呈现多种格局,包括正相关、负相关,U型和单峰型格局,但多数物种未呈现显著相关性;幼苗叶片数量对虫食强度的影响存在显著的季节间差异和种间差异,研究结果有助于我们进一步理解亚热带森林内植食性昆虫对木本植物幼苗群落的物种共存和多样性维持的作用。建议,在相关的动植物互作研究中,既要考虑物种特异性,也要考虑季节差异,同时还要考虑不同指标对研究结果的潜在影响。Investigating the correlation between herbivory intensity and number of leaves of individual seedlings can help us better understand the effects of food abundance on herbivory intensity at small scale.In this study,we com⁃pared the correlations between herbivory intensity and the number of leaves among seasons and plant species in a subtropical forest in Ailao Mountain,using linear mixed model and generalized linear mixed model.Across all the species,a significant U⁃shaped pattern was detected between the number of leaves and herbivory frequency(i.e.,the ratio of the number of leaves suffered insect herbivory to the total number of leaves of a target individual)in September and May,but a hump⁃shaped pattern in December.The number of leaves had a minor effect on herbivory intensity(i.e.,proportion of leaf area damaged by insect)in all the seasons.At the species level,much more com⁃plicated results emerged,including monotonic increasing and decreasing trends,and U⁃shaped and hump⁃shaped patterns,although many species did not show a clear trend,indicating that the effect of leaf number on herbivory was species specific.The results would help us further understand the role of herbivorous insects in species coexis⁃tence and diversity maintenance of seedling communities in subtropical forests.Future studies of plant⁃herbivore interactions should consider the role of both species specificity and seasonal variation,as well as different herbivory indices.

关 键 词：植食性昆虫 动植物相互作用 非单调性 种间特异性 

分 类 号：S718.3[农业科学—林学]