生态学杂志2025，Vol.44Issue(8)：2557-2566,10.DOI:10.13292/j.1000-4890.202508.021
昆虫取食对2种亚热带乔木幼树光合特性与生物量分配的影响
Effect of insect herbivory on photosynthetic characteristics and biomass allocation in seedlings of two sub-tropical tree species
摘要
Abstract
Insect herbivory on leaf is a common phenomenon in forest ecosystems,which strongly affects tree growth,ecosystem structure and processes.However,it is unclear how insect herbivory influences plant photosyn-thesis,biomass accumulation and allocation of subtropical tree species.In this study,we examined the effects of in-sect herbivory and artificial defoliation on the growth,leaf photosynthetic characteristics and biomass allocation in seedlings of two subtropical tree species(i.e.,Cinnamomum camphora and Cryptomeria fortunei).Our results showed that short-term(i.e.,two months)insect herbivory increased net photosynthetic rate,stomatal conduct-ance,initial fluorescence(F0)of two tree species,but decreased intercellular CO2 concentration and chlorophyll a and b contents.However,long-term(i.e.,six months)insect herbivory inhibited the growth and total biomass of seedlings,but increased root shoot ratio.The effects of artificial defoliation on leaf photosynthetic characteristics were generally lower than that of insect herbivory,but there was no difference with respect to their impacts on bio-mass and its allocation among plant organs.Cinnamomum camphora biomass had significant negative correlations with F0.Stem biomass of Cryptomeria fortunei was negatively correlated with Gs,and positively correlated with chlo-rophyll a content.Our results implied that insect herbivory induced a short-term photosynthetic compensation,and therefore stimulating leaf photosynthesis,but inhibited the long-term growth and biomass accumulation of tree seed-lings.In addition,the simulation of insect herbivory using artificial defoliation method might underestimate the im-pacts of insect herbivory.关键词
昆虫取食/亚热带森林/光合特性/生物量分配Key words
insect herbivory/subtropical forest/photosynthetic characteristics/biomass allocation引用本文复制引用
陈子亮,许勤勤,杨雲雲,晏斌,胡亚林..昆虫取食对2种亚热带乔木幼树光合特性与生物量分配的影响[J].生态学杂志,2025,44(8):2557-2566,10.基金项目
国家自然科学基金面上项目(42077094)资助. （42077094）
