Cold thermopeaking-induced drift of nase Chondrostoma nasus larvae

D. Mameri; D. S. Hayes; S. FuehrerE. FaucheryS. SchmutzA. MonseratT. HaslerD. R. M. GrafJ. M. SantosM.T. FerreiraS. Auer

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Cold thermopeaking-induced drift of nase Chondrostoma nasus larvae

机译：Cold thermopeaking-induced drift of nase Chondrostoma nasus larvae

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Research on how intermittent water releases from hydropower plants affect the early life stages of fish has advanced in the last years, focusing not only on the direct impacts of rapid flow changes (hydropeaking), but also on the short-term fluctuations in water temperature (thermopeaking). Flow and thermal fluctuations caused by hydropeaking may affect fish movement patterns and migration at critical stages of a species' life cycle, e.g., by inducing passive downstream drift. Using two experimental outdoor channels, we investigated how nase (Chondrostoma nasus, Cypriniformes) larvae respond to a rapid drop in water temperature during hydropeaking (simulating a cold thermopeaking event), reaching on average 5.5 ℃ under peak flow (maximum discharge) conditions, in comparison with a hydropeaking treatment with a constant water temperature regime. Responses of fish larvae were analyzed during acclimation, up-ramping (increase in discharge), peak flow and down-ramping (decrease in discharge) phases. Fish drift increased during peak flow in the cold thermopeaking treatment compared to hydropeaking. Higher drift rates were also negatively associated with pronounced water temperature drops during peak flow conditions. In addition, the starting temperature of the experiment influenced drift during up-ramping. Overall, the results suggest that cold thermopeaking may increase drift in the early life stages of cypriniform fish compared with hydropeaking with stable water temperature. Hence, monitoring and active water temperature adjustments following hydropower releases should be adopted as strategies to mitigate power plant-related impacts on aquatic organisms.

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来源
《Aquatic sciences》 |2023年第2期|291-301|共11页
作者
D. Mameri; D. S. Hayes; S. FuehrerE. FaucheryS. SchmutzA. MonseratT. HaslerD. R. M. GrafJ. M. SantosM.T. FerreiraS. Auer;
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作者单位

Forest Research Centre (CEF) and Associate Laboratory TERRA, School of Agriculture, University of Lisbon, Tapada da Ajuda, 1349-017 Lisbon, Portugal;

University of Natural Resources and Life Sciences, Vienna, Department of Water, Atmosphere and Environment, Institute of Hydrobiology and Aquatic Ecosystem Management, Gregor-Mendel-Strasse 33,1180 Wien, Austria;

Graduate School of Engineering, University of Tours, 64 Avenue Jean Portalis, 37200 Tours, FranceEcole Nationale Superieure de 1'Energie, 1'Eau et l'Environnement, 21 Avenue Des Martyrs, 38031 Grenoble, France;

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收录信息美国《科学引文索引》(SCI);
原文格式 PDF
正文语种英语
中图分类
关键词
Thermal fluctuations; Young-of-the-year; Cyprinids; Hydropower; Flume experiments; Pulsed flows;

Cold thermopeaking-induced drift of nase Chondrostoma nasus larvae

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