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Recovery and Degradation Drive Changes in the Dispersal Capacity of Stream Macroinvertebrate Communities
Global Change Biology ( IF 10.8 ) Pub Date : 2025-01-27 , DOI: 10.1111/gcb.70054
Carlos Cano‐Barbacil, James S. Sinclair, Ellen A. R. Welti, Peter Haase
Global Change Biology ( IF 10.8 ) Pub Date : 2025-01-27 , DOI: 10.1111/gcb.70054
Carlos Cano‐Barbacil, James S. Sinclair, Ellen A. R. Welti, Peter Haase
Freshwater ecosystems face significant threats, including pollution, habitat loss, invasive species, and climate change. To address these challenges, management strategies and restoration efforts have been broadly implemented. Across Europe, such efforts have resulted in overall improvements in freshwater biodiversity, but recovery has stalled or failed to occur in many localities, which may be partly caused by the limited dispersal capacity of many species. Here, we used a comprehensive dataset comprising 1327 time series of freshwater macroinvertebrate communities ranging from 1968 to 2021 across 23 European countries to investigate whether dispersal capacity changes with the ecological quality of riverine systems. Sites experiencing improvements in ecological quality exhibited a net gain in species and tended to have macroinvertebrate communities containing species with stronger dispersal capacity (e.g., active aquatic and aerial dispersers, species with frequent propensity to drift, and insects with larger wings). In contrast, sites experiencing degradation of ecological quality exhibited a net loss of species and a reduction in the proportion of strong dispersers. However, this response varied extensively among countries and local sites, with some improving sites exhibiting no parallel gains in macroinvertebrates with higher dispersal capacity. Dispersal capacity of the local species pool can affect the success of freshwater ecosystem restoration projects. Management strategies should focus on enhancing landscape connectivity to create accessible “source” areas and refugia for sensitive taxa, especially as climate change reshapes habitat suitability. Additionally, biodiversity initiatives must incorporate adaptive decision‐making approaches that account for the site‐specific responses of macroinvertebrate communities to changes in ecological quality.
中文翻译:
恢复和降解推动了溪流大型无脊椎动物群落扩散能力的变化
淡水生态系统面临重大威胁,包括污染、栖息地丧失、入侵物种和气候变化。为了应对这些挑战,已经广泛实施了管理策略和恢复工作。在整个欧洲,这些努力导致了淡水生物多样性的整体改善,但许多地方的恢复停滞不前或未能发生,这可能部分是由于许多物种的传播能力有限造成的。在这里,我们使用了一个全面的数据集,其中包含 1968 年至 2021 年欧洲 23 个国家的 1327 个淡水大型无脊椎动物群落的时间序列,以研究扩散能力是否随河流系统的生态质量而变化。生态质量改善的地点表现出物种的净增加,并且往往具有大型无脊椎动物群落,其中包含具有更强传播能力的物种(例如,活跃的水生和空中分散者、经常漂移倾向的物种以及翅膀较大的昆虫)。相比之下,生态质量退化的地点表现出物种的净损失和强分散者的比例减少。然而,这种反应在不同国家和地方地点之间差异很大,一些改进的地点在具有较高传播能力的大型无脊椎动物中没有表现出类似的收益。当地物种库的扩散能力会影响淡水生态系统恢复项目的成功。管理策略应侧重于加强景观连通性,为敏感分类群创造可进入的“源”区域和避难所,尤其是在气候变化重塑栖息地适宜性的情况下。 此外,生物多样性倡议必须纳入适应性决策方法,以考虑大型无脊椎动物群落对生态质量变化的特定地点反应。
更新日期:2025-01-27
中文翻译:
恢复和降解推动了溪流大型无脊椎动物群落扩散能力的变化
淡水生态系统面临重大威胁,包括污染、栖息地丧失、入侵物种和气候变化。为了应对这些挑战,已经广泛实施了管理策略和恢复工作。在整个欧洲,这些努力导致了淡水生物多样性的整体改善,但许多地方的恢复停滞不前或未能发生,这可能部分是由于许多物种的传播能力有限造成的。在这里,我们使用了一个全面的数据集,其中包含 1968 年至 2021 年欧洲 23 个国家的 1327 个淡水大型无脊椎动物群落的时间序列,以研究扩散能力是否随河流系统的生态质量而变化。生态质量改善的地点表现出物种的净增加,并且往往具有大型无脊椎动物群落,其中包含具有更强传播能力的物种(例如,活跃的水生和空中分散者、经常漂移倾向的物种以及翅膀较大的昆虫)。相比之下,生态质量退化的地点表现出物种的净损失和强分散者的比例减少。然而,这种反应在不同国家和地方地点之间差异很大,一些改进的地点在具有较高传播能力的大型无脊椎动物中没有表现出类似的收益。当地物种库的扩散能力会影响淡水生态系统恢复项目的成功。管理策略应侧重于加强景观连通性,为敏感分类群创造可进入的“源”区域和避难所,尤其是在气候变化重塑栖息地适宜性的情况下。 此外,生物多样性倡议必须纳入适应性决策方法,以考虑大型无脊椎动物群落对生态质量变化的特定地点反应。