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| DOI | 10.1007/s00027-023-01037-8 |
| Macroinvertebrate communities reveal regional asymmetries in riverine ecosystems along a gradient of water availability in hydrologically distinct years | |
| 发表日期 | 2024 |
| ISSN | 1015-1621 |
| EISSN | 1420-9055 |
| 起始页码 | 86 |
| 结束页码 | 1 |
| 卷号 | 86期号:1 |
| 英文摘要 | Climate change has been increasing the frequency and severity of drought periods. There is a need to understand how this water scarcity affects aquatic communities. The main aim of this work was to compare the macroinvertebrate communities and their bioindicator value (ecological status sensu the Water Framework Directive) in three Regions [northeast (N), central (C) and south (S)] of Portugal along a water availability and climate gradient, in two consecutive years that reflect hydrologically distinct scenarios (2018 versus 2019). The period prior to sampling (summer and autumn 2017) was extremely dry and hot, whereas climatic fluctuations in 2018-2019 (when the sampling occurred) were closer to the norm. A total of 28 sampling sites were surveyed in streams of Regions where water scarcity is differentially constitutive. The results showed a consistent environmental and ecological gradient in both years, despite the background differences. A coinciding mineralization, temperature, riparian cover and water availability gradient clearly separated Regions C (wettest) and S (driest), with Region N occupying an intermediate position. Region C had overall higher ecological quality (prevalence of sensitive organisms) in both years. Despite our a priori expectations that 2018 would represent a much more stressful condition, with larger differences across Regions (because of their constitutive background), the data suggest that macroinvertebrate communities may be resilient or adapted, to some degree, to hydrological fluctuations. Signs of more favourable conditions in 2019 were also observed (general improvement in ecological status). Studies across hydrological and climatic gradients (in time and space) are particularly important where water availability is becoming more challenging. |
| 英文关键词 | Drought; Ecological status; Environmental gradient; Macroinvertebrate communities; Mediterranean streams; Water availability |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology |
| WOS类目 | Environmental Sciences ; Limnology ; Marine & Freshwater Biology |
| WOS记录号 | WOS:001132324700001 |
| 来源期刊 | AQUATIC SCIENCES
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/299256 |
| 作者单位 | Universidade de Aveiro; Universidade do Minho; Universidade do Minho; Universidade do Minho |
| 推荐引用方式 GB/T 7714 | . Macroinvertebrate communities reveal regional asymmetries in riverine ecosystems along a gradient of water availability in hydrologically distinct years[J],2024,86(1). |
| APA | (2024).Macroinvertebrate communities reveal regional asymmetries in riverine ecosystems along a gradient of water availability in hydrologically distinct years.AQUATIC SCIENCES,86(1). |
| MLA | "Macroinvertebrate communities reveal regional asymmetries in riverine ecosystems along a gradient of water availability in hydrologically distinct years".AQUATIC SCIENCES 86.1(2024). |
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