植株高度对木本植物幼苗叶片虫食强度的影响  

Effects of plant height on insect herbivory of woody seedling leaves

作　　者：张翔 杨安婷 王博 ZHANG Xiang;YANG Anting;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,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,东至247230

出　　处：《生态科学》2024年第4期11-17,共7页Ecological Science

基　　金：国家自然科学基金项目(32171533,31971444);安徽省自然科学基金杰青项目(2208085J28)。

摘　　要：植食性昆虫对植物叶片的取食是影响森林中植物幼苗生长和死亡的重要因素。株高作为林内幼苗的重要性状,直接影响幼苗的光能获取和叶片营养物质的积累,还与叶重比、比叶面积以及叶片氮含量等性状具有不同程度相关性,可能会对幼苗遭受的的虫食强度产生一定的影响。然而,当前关于虫食强度的研究,大多聚焦于植物叶片的性状方面(例如各种营养成分以及物理和化学防御特征等),很少关注株高对虫食强度的影响。通过对云南哀牢山亚热带森林内39种木本植物的354株幼苗进行虫食强度的调查,深入探讨了幼苗的株高对虫食强度的影响。结果表明:在群落水平上,幼苗的株高与虫食强度存在显著正相关;而在物种水平上,不同物种间表现出差异性格局,表明株高对幼苗虫食强度的影响存在种间特异性。结合株高对幼苗存活和竞争的影响,植食性昆虫对较高植株幼苗的的偏好性取食,有利于较低幼苗的存活,从而对林内整体幼苗群落的生长和存活具有一定促进作用。Insect herbivory is an important factor affecting the growth and death of plant seedlings in forest.Most of the current researches mainly focus on the effects of leaf traits,such as various nutrients,physical and chemical defense characteristics.Plant height,as an important functional trait of seedlings in the forest,directly affects the light acquisition and nutrient accumulation of leaves.In addition,plant height often correlates with leaf mass fraction,specific leaf area and leaf nitrogen content.However,few studies pay attention to the effect of seedling height on insect herbivory.In this study,the effect of plant height on insect herbivory was tested by investigating 354 seedlings of 39 woody plant species in a subtropical forest in Ailao Mountain,Yunnan Province.The results showed that there was a significant positive correlation between seedling height and insect herbivory at the community level.At the species level,different species showed different patterns,indicating that the effect of plant height on insect herbivory was species specific.Combined with the effect of plant height on seedling survival and competition,the preference of herbivorous insects to higher plant seedlings may benefit the survival of lower seedlings,which can further promote the growth and survival of the whole seedling community in the forest.

关 键 词：株高 虫食强度 种间差异 

分 类 号：Q948.12[生物学—植物学]