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DOI | 10.1111/fme.12704 |
Shaded streams with permeable watersheds provide naturally resilient fish habitat refugia during heatwaves | |
Kelly, Sean; Kelly, Fiona L. | |
发表日期 | 2024 |
ISSN | 0969-997X |
EISSN | 1365-2400 |
英文摘要 | Streamflow, dissolved oxygen, and water temperature underpin stream fish habitat suitability, so climate change could cause widespread habitat deterioration. Identifying stream characteristics that mediate habitat resilience to heatwaves will allow conservation effort prioritisation. Here, a set of readily applied metrics were used to assess hydrological and oxythermal responses of neighbouring salmonid streams, with distinctive geologies, soil-types, and localised riparian shading, to periods of anomalously warm conditions. During heatwaves, low flows, warm-water temperatures, and diel oxygen variability, associated with biogenic production and respiration, predominated. In a low-shade stream lacking significant catchment water storage, high daytime (>22 degrees C) and night-time (>19 degrees C) water temperatures and low early morning O-2 concentrations (<5 mg L-1) accumulated oxythermal stress for salmonids throughout summer. A stream with localised shading and a higher proportion of underlying aquifers and permeable soils throughout its watershed experienced considerably less cumulative oxythermal stress (O-2 > 6 mg L-1; temperatures <19 degrees C), whilst slower release of subsurface water bolstered base flows during dry spells. Our findings support conservation of shaded streams with permeable watersheds characterised by higher soil infiltration rates and aquifer storage capacity as salmonid sanctuaries under a warmer, drier summer climate. Preventing water quality and hydromorphological deterioration are paramount for safeguarding their role as climate refugia. |
英文关键词 | climate mitigation; fish habitat; heatwaves; hydrogeology; oxythermal stress; salmonids |
语种 | 英语 |
WOS研究方向 | Fisheries |
WOS类目 | Fisheries |
WOS记录号 | WOS:001194545200001 |
来源期刊 | FISHERIES MANAGEMENT AND ECOLOGY |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/297282 |
推荐引用方式 GB/T 7714 | Kelly, Sean,Kelly, Fiona L.. Shaded streams with permeable watersheds provide naturally resilient fish habitat refugia during heatwaves[J],2024. |
APA | Kelly, Sean,&Kelly, Fiona L..(2024).Shaded streams with permeable watersheds provide naturally resilient fish habitat refugia during heatwaves.FISHERIES MANAGEMENT AND ECOLOGY. |
MLA | Kelly, Sean,et al."Shaded streams with permeable watersheds provide naturally resilient fish habitat refugia during heatwaves".FISHERIES MANAGEMENT AND ECOLOGY (2024). |
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