دورية أكاديمية
Hydropower impacts on reservoir fish populations are modified by environmental variation.
| العنوان: | Hydropower impacts on reservoir fish populations are modified by environmental variation. |
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| المؤلفون: | Eloranta AP; Department of Aquatic Ecology, Norwegian Institute for Nature Research (NINA), P.O. Box 5685 Torgard, NO-7485 Trondheim, Norway. Electronic address: antti.eloranta@nina.no., Finstad AG; Department of Aquatic Ecology, Norwegian Institute for Nature Research (NINA), P.O. Box 5685 Torgard, NO-7485 Trondheim, Norway; Centre for Biodiversity Dynamics, Department of Natural History, NTNU University Museum, Erling Skakkes gate 47A, NO-7013 Trondheim, Norway. Electronic address: anders.finstad@ntnu.no., Helland IP; Department of Aquatic Ecology, Norwegian Institute for Nature Research (NINA), P.O. Box 5685 Torgard, NO-7485 Trondheim, Norway. Electronic address: ingeborg.helland@nina.no., Ugedal O; Department of Aquatic Ecology, Norwegian Institute for Nature Research (NINA), P.O. Box 5685 Torgard, NO-7485 Trondheim, Norway. Electronic address: ola.ugedal@nina.no., Power M; Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada. Electronic address: m3power@uwaterloo.ca. |
| المصدر: | The Science of the total environment [Sci Total Environ] 2018 Mar 15; Vol. 618, pp. 313-322. Date of Electronic Publication: 2017 Nov 10. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0330500 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1026 (Electronic) Linking ISSN: 00489697 NLM ISO Abbreviation: Sci Total Environ Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Amsterdam, Elsevier. |
| مواضيع طبية MeSH: | Ecosystem* , Renewable Energy* , Trout*, Animals ; Biomass ; Lakes ; Norway ; Water Movements ; Water Resources |
| مستخلص: | Global transition towards renewable energy production has increased the demand for new and more flexible hydropower operations. Before management and stakeholders can make informed choices on potential mitigations, it is essential to understand how the hydropower reservoir ecosystems respond to water level regulation (WLR) impacts that are likely modified by the reservoirs' abiotic and biotic characteristics. Yet, most reservoir studies have been case-specific, which hampers large-scale planning, evaluation and mitigation actions across various reservoir ecosystems. Here, we investigated how the effect of the magnitude, frequency and duration of WLR on fish populations varies along environmental gradients. We used biomass, density, size, condition and maturation of brown trout (Salmo trutta L.) in Norwegian hydropower reservoirs as a measure of ecosystem response, and tested for interacting effects of WLR and lake morphometry, climatic conditions and fish community structure. Our results showed that environmental drivers modified the responses of brown trout populations to different WLR patterns. Specifically, brown trout biomass and density increased with WLR magnitude particularly in large and complex-shaped reservoirs, but the positive relationships were only evident in reservoirs with no other fish species. Moreover, increasing WLR frequency was associated with increased brown trout density but decreased condition of individuals within the populations. WLR duration had no significant impacts on brown trout, and the mean weight and maturation length of brown trout showed no significant response to any WLR metrics. Our study demonstrates that local environmental characteristics and the biotic community strongly modify the hydropower-induced WLR impacts on reservoir fishes and ecosystems, and that there are no one-size-fits-all solutions to mitigate environmental impacts. This knowledge is vital for sustainable planning, management and mitigation of hydropower operations that need to meet the increasing worldwide demand for both renewable energy and ecosystem services delivered by freshwaters. (Copyright © 2017 Elsevier B.V. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Anthropogenic disturbance; Hydroelectricity; Lake ecosystem; Population dynamics; Renewable energy; Salmonid |
| تواريخ الأحداث: | Date Created: 20171114 Date Completed: 20180823 Latest Revision: 20180823 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1016/j.scitotenv.2017.10.268 |
| PMID: | 29131999 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1879-1026 |
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| DOI: | 10.1016/j.scitotenv.2017.10.268 |