Macroscale analyses suggest invasive plant impacts depend more on the composition of invading plants than on environmental context

作者：Evelyn M. Beaury, Helen R. Sofaer, Regan Early, Ian S. Pearse, Dana M. Blumenthal, Jeffrey D. Corbin, Jeffrey M. Diez, Jeffrey S. Dukes, David T. Barnett, Inés Ibáñez, Laís Petri, Montserrat Vilà, Bethany A. Bradley · 发表于：Global Ecology and Biogeography · 年份：2023 · DOI：10.1111/geb.13749 · 被引用次数：15 · 研究领域：Ecology and Vegetation Dynamics Studies、Plant and animal studies、Species Distribution and Climate Change

Abstract Aim Native biodiversity is threatened by the spread of non‐native invasive species. Many studies demonstrate that invasions reduce local biodiversity but we lack an understanding of how impacts vary across environments at the macroscale. Using ~11,500 vegetation surveys from ecosystems across the United States, we quantified how the relationship between non‐native plant cover and native plant diversity varied across different compositions of invading plants (measured by non‐native plant richness and evenness) and environmental contexts (measured by productivity and human activity). Location Continental United States. Time Period Surveys from 1990s‐present. Major Taxa Studied Terrestrial plant communities. Methods We fit mixed effects models to understand how native plant richness, diversity and evenness varied with non‐native cover. We tested how this relationship varied when non‐native cover interacted with non‐native plant richness and evenness, and with productivity and human activity. Results Across the United States, communities with greater cover of non‐native plants had lower native plant richness and diversity but higher evenness, suggesting rare native plants can be lost while dominant plants decline in abundance. The relationship between non‐native cover and native community diversity varied with non‐native plant richness and evenness but was not associated with productivity and human activity. Negative associations were strongest in areas with low non‐nati...