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| DOI | 10.1016/j.scitotenv.2024.171849 |
| Assessing the response of an urban stream ecosystem to salinization under different flow regimes | |
| 发表日期 | 2024 |
| ISSN | 0048-9697 |
| EISSN | 1879-1026 |
| 起始页码 | 926 |
| 卷号 | 926 |
| 英文摘要 | Urban streams are exposed to a variety of anthropogenic stressors. Freshwater salinization is a key stressor in these ecosystems that is predicted to be further exacerbated by climate change, which causes simultaneous changes in flow parameters, potentially resulting in non-additive effects on aquatic ecosystems. However, the effects of salinization and flow velocity on urban streams are still poorly understood as multiple-stressor experiments are often conducted at pristine rather than urban sites. Therefore, we conducted a mesocosm experiment at the Boye River, a recently restored stream located in a highly urbanized area in Western Germany, and applied recurrent pulses of salinity along a gradient (NaCl, 9 h daily of +0 to +2.5 mS/cm) in combination with normal and reduced current velocities (20 cm/s vs. 10 cm/s). Using a comprehensive assessment across multiple organism groups (macroinvertebrates, eukaryotic algae, fungi, parasites) and ecosystem functions (primary production, organic-matter decomposition), we show that flow velocity reduction has a pervasive impact, causing community shifts for almost all assessed organism groups (except fungi) and inhibiting organic-matter decomposition. Salinization affected only dynamic components of community assembly by enhancing invertebrate emigration via drift and reducing fungal reproduction. We caution that the comparatively small impact of salt in our study can be due to legacy effects from past salt pollution by coal mining activities >30 years ago. Nevertheless, our results suggest that urban stream management should prioritize the continuity of a minimum discharge to maintain ecosystem integrity. Our study exemplifies a holistic approach for the assessment of multiple-stressor impacts on streams, which is needed to inform the establishment of a salinity threshold above which mitigation actions must be taken. |
| 英文关键词 | Fungi Parasites; Fungi; Organic-matter decomposition; Primary production; Algae; Macroinvertebrates |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| WOS记录号 | WOS:001225022000001 |
| 来源期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/290338 |
| 作者单位 | University of Duisburg Essen; University of Duisburg Essen; University of Duisburg Essen; Leibniz Institut fur Gewasserokologie und Binnenfischerei (IGB); University of Duisburg Essen; University of Duisburg Essen; University of Duisburg Essen; Ruhr University Bochum; University of Oslo; Trinity College Dublin; Trinity College Dublin; University of Duisburg Essen; Oakland University |
| 推荐引用方式 GB/T 7714 | . Assessing the response of an urban stream ecosystem to salinization under different flow regimes[J],2024,926. |
| APA | (2024).Assessing the response of an urban stream ecosystem to salinization under different flow regimes.SCIENCE OF THE TOTAL ENVIRONMENT,926. |
| MLA | "Assessing the response of an urban stream ecosystem to salinization under different flow regimes".SCIENCE OF THE TOTAL ENVIRONMENT 926(2024). |
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