归化
生态学
种间竞争
引进物种
促进
入侵物种
竞赛(生物学)
互惠主义(生物学)
共存理论
系统发育树
生物
外星人
人口
基因
社会学
人口学
神经科学
生物化学
人口普查
作者
Jiang Wang,Shaopeng Li,Yuan Ge,Xiaoyan Wang,Song Gao,Tong Chen,Fei‐Hai Yu
出处
期刊:Ecology
[Wiley]
日期:2022-08-13
卷期号:104 (1)
被引量:22
摘要
Although phylogenetic distance between native and exotic species has a close link with their interactions, it is still unclear how environmental stresses and species interactions influence the relationship between phylogenetic distance and biological invasions. Here we assessed the effect of invader-native phylogenetic distance on the growth of the invader (Symphyotrichum subulatum) under three levels of drought (no, moderate, or intense drought). Under no drought, interspecific competition between close relatives was the dominant process and native communities more closely related to the invader showed higher resistance to invasion, supporting Darwin's naturalization hypothesis. In contrast, under intense drought, facilitation between close relatives by mutualism with arbuscular mycorrhizal fungi (AMF) became more important, and the invader became more successful in their more closely related native communities, supporting the preadaptation hypothesis. The colonization rate of AMF of the invader was higher in more closely related native communities regardless of the drought treatment, but it was only positively related to invader biomass under intense drought. Therefore, the shift of species interactions from competition to facilitation may be ascribed to the promotion of AMF to invasion occurring under intense drought, which leads to the effect of closely related natives on the invader shifting from negative to positive. Our results provide a new angle to resolve Darwin's naturalization conundrum from the change of species interactions along a stress gradient, and provide important clues for invasion management when species interactions change in response to global climatic change.
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