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Category Text Publication
Reference Category Journals
DOI 10.1007/s11427-021-2148-7
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Title (Primary) Differential impacts of adult trees on offspring and non-offspring recruits in a subtropical forest
Author Wang, F.; Mi, X.; Chen, L.; Xu, W.; Durka, W. ORCID logo ; Swenson, N.G.; Johnson, D.J.; Worthy, S.J.; Xue, J.; Zhu, Y.; Schmid, B.; Liang, Y.; Ma, K.
Source Titel Science China-Life Sciences
Year 2022
Department BZF
Volume 65
Issue 10
Page From 1905
Page To 1913
Language englisch
Topic T5 Future Landscapes
Keywords genetic relatedness; conspecific negative density dependence; Janzen-Connell hypothesis; species coexistence; forest dynamics plot; subtropical forest
Abstract 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.
Persistent UFZ Identifier
Wang, F., Mi, X., Chen, L., Xu, W., Durka, W., Swenson, N.G., Johnson, D.J., Worthy, S.J., Xue, J., Zhu, Y., Schmid, B., Liang, Y., Ma, K. (2022):
Differential impacts of adult trees on offspring and non-offspring recruits in a subtropical forest
Sci. China-Life Sci. 65 (10), 1905 - 1913 10.1007/s11427-021-2148-7