The Application of Traits-Based Assessment Approaches to Estimate the Effects of Hydroelectric Turbine Passage on Fish Populations

Cada, G.F.; Schweizer, Peter E.

doi:10.2172/1038082

Cited by 11 publications

(23 citation statements)

References 25 publications

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“…Moreover, this entrainment/passage recruitment may be particularly important for downstream populations without access to spawning grounds. Furthermore, given the importance of downstream dispersal for larval and juvenile stream potadromous fish (Wolter & Sukhodolov, ), and the potentially low turbine passage mortalities of these life‐history stages (Čada & Schweizer, ), turbine passage likely provides an important passage route for potadromous larval and juvenile stages.…”

Section: Review Of Evidence For Turbine Passage and Impacts On Downstmentioning

confidence: 99%

“…Turbine passage mortality, that is, the proportion of individuals that do not survive the passage past turbines, can lower or eliminate downstream movement, and is an important metric for understanding dam impacts (Colotelo et al., ). Indeed, turbine passage mortality and the traits which predict mortality have been extensively reviewed (Cada, ; Čada & Schweizer, ; Pracheil, McManamay, Bevelhimer, DeRolph, & Čada, ). This focus on turbine passage mortality may have occurred due to regulatory interest in high‐value anadromous fish and an engineering focus on turbine design to reduce injury and mortality.…”

Section: Introductionmentioning

confidence: 99%

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Turbine entrainment and passage of potadromous fish through hydropower dams: Developing conceptual frameworks and metrics for moving beyond turbine passage mortality

et al. 2019

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Potadromous fishes are vulnerable to involuntary entrainment through hydropower turbines. However, turbines can also provide a downstream passage route for potadromous fish. Here, we review evidence for turbine entrainment and passage in potadromous fish, and evaluate the effects of these processes on upstream and downstream populations. We develop conceptual frameworks and metrics to quantify vulnerability to turbine entrainment removals, and to quantify the efficiency of turbines as a downstream passage route. We highlight factors that influence these processes and provide case‐studies demonstrating their applicability. We found that juvenile potadromous fish are being entrained through turbines at rates high enough to impact upstream populations. Given that juvenile passage survival is often high, we argue that turbines provide an important downstream passage route for potadromous fish. We show that entrainment vulnerability is likely a function of interactions between in‐reservoir fish behaviour, habitat configuration and operations and thus not well captured by passage mortality estimates. Similarly, we show that while passage mortality can limit downstream passage efficiency, passage success is also dependent on reservoir and forebay navigation, along with survival and fitness in the downstream river. We advocate for a shift in focus away from estimates of passage mortality and injury, which have previously accounted for the majority of turbine passage research. Instead, we recommend an approach that focusses on quantification of the factors that influence downstream passage efficiency and entrainment vulnerability. Moreover, we highlight the need to better understand the broader scale impacts of these events on upstream and downstream populations.

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Section: Review Of Evidence For Turbine Passage and Impacts On Downstmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Turbine entrainment and passage of potadromous fish through hydropower dams: Developing conceptual frameworks and metrics for moving beyond turbine passage mortality

et al. 2019

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“… for an exception). Lacking such studies, a traits‐based assessment procedure (Ĉada & Schweizer ) was undertaken.…”

Section: Threats To Reservoir Populationsmentioning

confidence: 99%

“…In this study, a traits‐based assessment approach (Rubach et al . ; Ĉada & Schweizer ) was used to review the threats and benefits of hydropower facilities to burbot populations. The effects of flow alterations, thermal habitat changes and disruption of downstream connectivity for riverine burbot populations below hydropower dams were assessed, and the consequences of turbine entrainment, reservoir drawdown, trophic depression and disruption of upstream connectivity for reservoir burbot populations were investigated.…”

Section: Introductionmentioning

confidence: 99%

Burbot and large hydropower in North America: benefits, threats and research needs for mitigation

Harrison

Gutowsky

Martins

et al. 2016

Fisheries Management Eco

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In North America, burbot Lota lota (L.), interactions with hydropower are common, southern burbot populations are endangered and hydropower has been implicated in the decline. Thus, the objectives of this review were to identify threats and benefits of hydropower to riverine and reservoir dwelling burbot, assess overall impacts and identify key research needs for mitigation. Review findings suggest that while winter hydropower discharge regimes threaten riverine burbot spawning, burbot often successfully exploit reservoir environments. Further, while turbine entrainment has been hypothesised as a factor in the decline of burbot populations, low adult vulnerability to passage and a high resilience to juvenile removals likely mean risk to populations is low. Identified research needs include better definitions of flow and temperature requirements for riverine burbot and a quantification of the potential for reservoirs to act as source populations for downstream impacted zones. This review highlights the Pacific watershed focus of existing work and calls for status assessments and ecological research of burbot in North American Arctic and Atlantic watersheds where large hydropower and burbot interactions are common yet rarely studied.

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“…ORNL has also started a second approach that uses a traits-based analysis of fish vulnerability to turbine passage using the conceptual framework outlined by Cada and Schweizer (2012) to identify species of concern. By applying a traits-based assessment using a conceptual model that accounts for entrainment, passage, and population sustainability risks based on fish traits and turbine characteristics, more refined results can be achieved across the landscape and a more in-depth discretization of results can be performed.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Application Space Expansion for the Sensor Fish

DeRolph

Bevelhimer

2014

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The Application of Traits-Based Assessment Approaches to Estimate the Effects of Hydroelectric Turbine Passage on Fish Populations

Cited by 11 publications

References 25 publications

Turbine entrainment and passage of potadromous fish through hydropower dams: Developing conceptual frameworks and metrics for moving beyond turbine passage mortality

Turbine entrainment and passage of potadromous fish through hydropower dams: Developing conceptual frameworks and metrics for moving beyond turbine passage mortality

Burbot and large hydropower in North America: benefits, threats and research needs for mitigation

Evaluation of Application Space Expansion for the Sensor Fish

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