Herbivory and allelopathy contribute jointly to the diversity-invasibility relationship.

Autor: Wang J; Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China., Gao S; Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China., Hong H; Linhai Branch of Taizhou Ecological Environment Bureau, Linhai, China., Xue W; Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China., Yuan J; Taizhou Ecological and Environmental Monitoring Center, Taizhou, China., Wang XY; Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China., van Kleunen M; Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China.; School of Advanced Study, Taizhou University, Taizhou, China.; Ecology, Department of Biology, University of Konstanz, Konstanz, Germany., Li J; Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China.; School of Advanced Study, Taizhou University, Taizhou, China.
Jazyk: angličtina
Zdroj: Ecology [Ecology] 2024 Nov 27, pp. e4490. Date of Electronic Publication: 2024 Nov 27.
DOI: 10.1002/ecy.4490
Abstrakt: Although herbivory and allelopathy play important roles in plant invasions, their roles in mediating the effect of plant diversity on invasion resistance remain unknown. In a 2-year field experiment, we constructed native plant communities with four levels of species richness (one, two, four, and eight species) and used a factorial combination of insecticide and activated carbon applications to reduce herbivory and allelopathy, respectively. We then invaded the communities with the introduced plant Solidago canadensis L. One year after the start of the experiment, there was no statistically significant net effect of species richness on biomass of the invader. However, a structural equation model showed that species richness had a positive direct effect on invader biomass that was partially balanced out by a negative indirect effect of species richness via increased light interception. In the second year, the relationship between invader biomass and species richness was negative when we analyzed the treatment combination with herbivory and allelopathy separately. Therefore, we conclude that joint effects of herbivory and allelopathy may play major roles in driving the diversity-invasibility relationship and should be considered in future studies.
(© 2024 The Ecological Society of America.)
Databáze: MEDLINE
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