| 3 | Differential impacts of adult trees on offspring and non-offspring recruits in a subtropical forest显示文摘An important mechanism promoting species coexistence is conspecific negative density dependence(CNDD),which inhibits conspecific neighbors by accumulating host-specific enemies near adult trees.Natural enemies may be genotype-specific and regulate offspring dynamics more strongly than non-offspring,which is often neglected due to the difficulty in ascertaining genetic relatedness.Here,we investigated whether offspring and non-offspring of a dominant species,Castanopsis eyrei,suffered from different strength of CNDD based on parentage assignment in a subtropical forest.We found decreased recruitment efficiency(proxy of survival probability)of offspring compared with non-offspring near adult trees during the seedling-sapling transition,suggesting genotype-dependent interactions drive tree demographic dynamics.Furthermore,the genetic similarity between individuals of same cohort decreased in late life history stages,indicating genetic-relatedness-dependent tree mortality throughout ontogeny.Our results demonstrate that within-species genetic relatedness significantly affects the strength of CNDD,implying genotype-specific natural enemies may contribute to population dynamics in natural forests. | Fang Wang Xiangcheng Mi Lei Chen Wubing Xu Walter Durka Nathan GSwenson Daniel JJohnson Samantha JWorthy Jianhua Xue Yan Zhu Bernhard Schmid Yu Liang Keping Ma | 2022 | Science China(Life Sciences)2022，65，10： | 0 |
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