近日，我所孙见凡老师在Science of the Total Environment (IF: 9.8)线上发表最新研究论文“Microplastics and cadmium affect invasion success by altering complementarity and selection effects in native community”。江苏大学为第一完成单位，我院学生何峰为第一作者，孙见凡老师为通讯作者。

在当前全球化的背景下，生物入侵已成为威胁生物多样性、破坏生态平衡及造成经济损失的主要因素之一。Elton的"多样性-入侵性"假说认为，具有高生物多样性的群落相较于低生物多样性群落能更有效地抵抗外来物种的入侵。然而，这项假设在面对环境异质性和环境污染干扰时，仍然存在争议。本研究考察了微塑料和镉两种污染物如何影响本地群落多样性对入侵物种的抵抗力，揭示了污染物可能通过改变本地群落的互补和选择效应来影响入侵成功的新机制。

研究结果表明，微塑料和镉的不同处理改变了外来植物对本地群落的入侵成功，并且这种效应取决于污染物的类型。微塑料单独处理减少了入侵成功，且随着本地群落多样性的增加，减少幅度更大；而镉单独处理则增加了入侵植物的地上生物量和入侵成功。但微塑料的存在抑制了镉对入侵成功的贡献。

此外，研究还发现，本地群落的互补和选择效应与入侵成功率呈负相关，且它们对入侵成功的相对贡献也取决于污染物类型。这一发现为如何通过管理环境污染来控制和预防生物入侵提供了新的证据。特别是在生态敏感和受污染的区域，对于促进生物多样性的保护具有重要意义。

Fig. Soil microplastics (MPs) and cadmium (Cd) have varying effects on native community diversity-invasibility relationships, potentially influencing the invasion of exotic plants in contaminated native communities. MPs inhibit invasion success by facilitating the native community diversity-selection effect relationship, and Cd promote invasion success by inhibiting the native community diversity-complementarity effect relationship.

Fig. Relationships of complementarity and selection effects in different pollutant treatments to aboveground biomass (a and b) and invasion success (c and d) of invasive plants. Note: CK represents no MPs and Cd treatment, MPs represents microplastics alone, Cd represents cadmium alone, and Mixed represents combined MPs and Cd. Solid lines indicate statistically significant relationships (P < 0.1). Significant effect is P < 0.05, while marginally significant is 0.05 < P < 0.1. Dashed lines represent non-significant relationships (P > 0.1).

该研究成果得到了国家自然科学基金（Grants No. 31971427）等项目的资助。全文链接：https://doi.org/10.1016/j.scitotenv.2024.171135