Invasive dominance and resident diversity: unpacking the impact of plant invasion on biodiversity and ecosystem function

Plant invasions have consistently been shown to cause significant reductions in the diversity of recipient plant communities; an effect that can cascade through ecosystems to impact the stocks and flows of nutrients and energy as well as the diversity of higher trophic levels. However, the manner in which invasive plants alter ecosystem functioning and trophic interactions is highly variable can occur through the direct effects of the invader’s abundance and its indirect effects via changes in community diversity. Understanding the nature of these interactions between plant invasion, community diversity and ecosystem functioning can provide insight for ecosystem managers. We evaluated whether plant invasion alters the relationship between biodiversity and ecosystem function (BEF) by comparing BEF models that either include or subtract the diversity and function values associated with the invasive vine, Vincetoxicum rossicum. To do this, we 1) characterize V. rossicum within the function...大量研究均证实，植物入侵会显著降低入侵生境中本地植物群落的物种多样性；该效应可沿生态系统级联传递，进而影响营养物质与能量的储存与流动，以及更高营养级类群的多样性。然而，入侵植物调控生态系统功能与营养级互作的方式存在显著异质性，其作用路径可分为两类：一是入侵植物自身种群丰度产生的直接效应，二是通过改变群落多样性引发的间接效应。明晰植物入侵、群落多样性与生态系统功能三者间的相互作用本质，可为生态系统管理者提供决策依据。本研究通过对比包含与剔除入侵藤蔓植物Vincetoxicum rossicum相关的多样性与功能数值的生物多样性与生态系统功能（Biodiversity and Ecosystem Function, BEF）模型，探究植物入侵是否会改变生物多样性与生态系统功能之间的关联。为达成该研究目标，我们1）在功能层面表征V. rossicum的生态特征……