Climate change vulnerability assessment for Pacific Lamprey in rivers of the Western United States

Wang, Christina J.; Schaller, Howard; Coates, Kelly C.; Hayes, Michael C.; Rose, Robert K.

doi:10.1080/02705060.2019.1706652

Cited by 23 publications

(20 citation statements)

References 36 publications

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“…The primary limiting factors within all four GMAs include predation by nonnative fishes (including Smallmouth Bass Micropterus dolomieu), upstream and downstream passage, stream and floodplain degradation, water quantity, and water quality (ODFW 2020a; Poirier and Coates 2020; Wang et al 2020). The threat in the Mid-South Coast and Umpqua GMAs in general, and the Umpqua River basin in particular, is climate change (Poirier and Coates 2020;Wang et al 2020). Within the Umpqua River basin, the potential burrowing habitat for larval Pacific Lamprey is constrained by a lack of alluvial deposits.…”

Section: Discussionmentioning

confidence: 99%

“…The threat in the Mid‐South Coast and Umpqua GMAs in general, and the Umpqua River basin in particular, is climate change (Poirier and Coates 2020; Wang et al. 2020). Within the Umpqua River basin, the potential burrowing habitat for larval Pacific Lamprey is constrained by a lack of alluvial deposits.…”

Section: Discussionmentioning

confidence: 99%

“…This lack of climate change resilience in the Umpqua River basin was a function of the lack of variability in historical hydrologic timing and stream temperatures (Wang et al. 2020). In addition, Smallmouth Bass populations in the Umpqua River basin are predicted to expand in the future (Jones et al.…”

Section: Discussionmentioning

confidence: 99%

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Abundance Trends for Adult Pacific Lamprey in Western Oregon (USA): Historic Declines, Recent Increases, and Relative Contributions from Coastal Rivers

et al. 2021

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The anadromous Pacific Lamprey Entosphenus tridentatus is native to the northern Pacific Ocean and its drainages, returning each spring to spawn in streams along the West Coast of North America. We analyzed abundance trends of adult Pacific Lamprey from dam counts and redd surveys in western Oregon, USA. We compared a series of generalized additive models (GAMs) to describe lamprey abundance trends. Lamprey counts varied considerably among dams but showed steep declines over 70+ years at Bonneville Dam on the Columbia River, over 50+ years (1965-2019) at Winchester Dam on the North Umpqua River, and over 17 years (1993-2009) at Gold Ray Dam on the Rogue River. By contrast, redd surveys displayed synchronous abundance trends of different magnitudes among geographic management areas on the Oregon coast, with an overall increasing abundance over 13 years (2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017)(2018)(2019). This corroborates pre-existing notions that Pacific Lamprey spawning in Oregon coast rivers are from a single mixed population. The most supported GAM included a fixed effect for location and allowed abundance to vary over years as a function of location. These results suggest that abundance trends among dam counts are more variable than coastal redd surveys and that dam counts and redd surveys across this large region are not useful proxies for each other. Furthermore, counts across dams may be more variable because they record prespawning lamprey and thus may be recording a mixture of cohorts. Redd surveys, by contrast, provide a metric of a single cohort of spawning lamprey.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Abundance Trends for Adult Pacific Lamprey in Western Oregon (USA): Historic Declines, Recent Increases, and Relative Contributions from Coastal Rivers

et al. 2021

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“…Annual counts of Pacific Lamprey at Winchester Dam on the North Umpqua River (at river kilometer 11.3, measuring from its confluence with the Umpqua River) averaged 28,900 from 1965 to 1971 but only 1,500 from 1972 to 2019 (ODFW 2020a). Lampreys in the Umpqua River basin face threats from dewatering, flow management, stream and floodplain degradation, impaired water quality, a changing climate, and predation by nonnative fish (Poirier and Coates 2019; USFWS 2019; Wang et al 2020). Spatially explicit frameworks for understanding the distributions of habitats supporting different lamprey life stages and potential threats would help the Cow Creek Band of Umpqua Tribe of Indians and state and federal agencies prioritize actions for lamprey conservation in the Umpqua River basin.…”

Section: Figurementioning

confidence: 99%

“…Rubenson and Olden (2020) generally found Smallmouth Bass where mean August water temperature exceeded 17°C in the Columbia River basin. As water temperature potentially warms in coming decades (Wang et al 2020), the distribution of Smallmouth Bass in the Umpqua River basin may expand upstream year-round or seasonally, where they are not limited by other habitat and biological factors, increasing predation risks for lampreys and other native fishes.…”

mentioning

confidence: 99%

River Network and Reach‐Scale Controls on Habitat for Lamprey Larvae in the Umpqua River Basin, Oregon

Jones

Dunham

O’Connor

et al. 2020

N American J Fish Manag

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This study developed a spatially explicit framework to support the conservation of Western Brook Lamprey Lampetra richardsoni and Pacific Lamprey Entosphenus tridentatus in the Umpqua River basin, Oregon. This framework identified locations within the river network likely to support "potential burrowing habitat" for lamprey larvae based on geomorphic conditions and evaluated the overlap of potential burrowing habitat with water temperatures suitable for the nonnative, piscivorous Smallmouth Bass Micropterus dolomieu. The study also documented reach-scale factors that create heterogeneity in potential burrowing habitat to guide on-the-ground habitat restoration. Based on criteria for mean annual suspended sediment loads and channel slope, 18% of the Umpqua River network was classified as potential burrowing habitat. Existing mean August water temperatures of ≥20°C were suitable for Smallmouth Bass for 32% of the potential burrowing habitat. This percentage increased to 41% of the potential burrowing habitat using projected mean August water temperatures for year 2040, suggesting that water temperatures in the future will facilitate upstream expansion of Smallmouth Bass into the potential burrowing habitat. At finer spatial scales, potential burrowing habitat was influenced by channel features, such as large wood, pools, and local channel slope and width. These results provide an initial template for identifying locations in river networks likely to have potential burrowing habitat, considering the overlap between threats and lamprey habitats, and planning conservation actions to support native lampreys.

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Strong but heterogeneous distributional responses to climate change are projected for temperate and semi‐arid stream vertebrates

Elliott¹,

Passy

Pound

et al. 2022

Aquatic Conservation

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1. Globally, freshwater systems are threatened by climate change, so projections under various climate change scenarios are needed to inform efforts to protect and conserve already vulnerable taxa.2. Here, the change in distribution of stream vertebrates was investigated under different greenhouse gas emission scenarios. Using occurrence data from multiple stream surveys in Washington State spanning 559 sites and 24 years, species distribution models for 23 aquatic vertebrate taxa (21 fish and two amphibians) were developed.3. Models projected changes in taxon distributions for 2070 under representative concentration pathways (RCPs) ranging from 2.6 to 8.5 W m À2 . To assess potential biological impacts of these predictions, changes in taxon richness and beta diversity of stream vertebrates were also investigated. Moreover, predictor variables were examined to assess which ones were more important in determining taxon distributions.4. Substantial changes in the spatial distribution of stream vertebrates were projected for all RCP scenarios by 2070, but the greatest changes were expected to occur under RCP 6.0 and 8.5. The taxa evaluated were predicted to experience substantial increase, decrease, or shift in distribution.5. Taxon richness of stream vertebrates was forecasted to increase with RCP scenario relative to historical conditions, suggesting that distributional expansions outpaced distributional contractions. However, beta diversity was predicted to decrease considerably, suggesting increased biotic homogenization. Variables important for determining future distributions varied by taxa, with most species influenced by a combination of variables.6. These results indicate that failing to reduce greenhouse gas emissions will lead to dramatic impacts on stream vertebrates. The magnitude of predicted future impacts was dependent upon RCP scenario, so advancements in policy to reduce carbon emissions are necessary. We also recommend as potential conservation measures preserving cold-water refugia and increasing efforts to lower stream water temperatures by, for example, expanding the riparian cover and/or linking surface water to groundwater.

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Climate change vulnerability assessment for Pacific Lamprey in rivers of the Western United States

Cited by 23 publications

References 36 publications

Abundance Trends for Adult Pacific Lamprey in Western Oregon (USA): Historic Declines, Recent Increases, and Relative Contributions from Coastal Rivers

Abundance Trends for Adult Pacific Lamprey in Western Oregon (USA): Historic Declines, Recent Increases, and Relative Contributions from Coastal Rivers

River Network and Reach‐Scale Controls on Habitat for Lamprey Larvae in the Umpqua River Basin, Oregon

Strong but heterogeneous distributional responses to climate change are projected for temperate and semi‐arid stream vertebrates

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