Long-term data reveal unimodal responses of ground beetle abundance to precipitation and land use but no changes in taxonomic and functional diversity

地甲虫 生物多样性 生态学 丰度(生态学) 气候变化 时间尺度 全球变化 无脊椎动物 土地利用 地理 环境变化 生物 栖息地
作者
Petr Zajíček,Ellen A. R. Welti,Nathan Jay Baker,Kathrin Januschke,Oliver Brauner,Peter Haase
出处
期刊:Scientific Reports [Springer Nature]
卷期号:11 (1) 被引量:16
标识
DOI:10.1038/s41598-021-96910-7
摘要

Abstract While much of global biodiversity is undoubtedly under threat, the responses of ecological communities to changing climate, land use intensification, and long-term changes in both taxonomic and functional diversity over time, has still not been fully explored for many taxonomic groups, especially invertebrates. We compiled time series of ground beetles covering the past two decades from 40 sites located in five regions across Germany. We calculated site-based trends for 21 community metrics representing taxonomic and functional diversity of ground beetles, activity density (a proxy for abundance), and activity densities of functional groups. We assessed both overall and regional temporal trends and the influence of the global change drivers of temperature, precipitation, and land use on ground beetle communities. While we did not detect overall temporal changes in ground beetle taxonomic and functional diversity, taxonomic turnover changed within two regions, illustrating that community change at the local scale does not always correspond to patterns at broader spatial scales. Additionally, ground beetle activity density had a unimodal response to both annual precipitation and land use. Limited temporal change in ground beetle communities may indicate a shifting baseline, where community degradation was reached prior to the start of our observation in 1999. In addition, nonlinear responses of animal communities to environmental change present a challenge when quantifying temporal trends.
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