Distribution and Abundance of Freshwater Mussels in the mid Klamath Subbasin, California

Davis, Emily; David, Aaron T.; Norgaard, Karie Marie; Parker, Timothy; McKay, Kara; Tennant, Christine; Soto, Toz; Rowe, Kyle; Reed, R. K.

doi:10.3955/046.087.0303

Cited by 11 publications

(16 citation statements)

References 34 publications

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“…In agreement with earlier studies, increasing sand at a site is positively associated with G. angulata habitat (Vannote and Minshall 1982) in Okanagan Lake. Sand provides a suitable medium within which G. angulata may bury (Vannote and Minshall 1982, COSEWIC 2003, Davis et al 2013, Strayer 2014 without inhibiting their movement.…”

Section: Geomorphic and Biotic Controls Of G Angulatamentioning

confidence: 99%

“…The positive association of mussels with boulders can be explained via the refuge and stability they offer, but their presence are not an essential part of suitable habitat at each site. The positive association with boulders may be explained by the fact that they provide micro-eddy environments beneath them, supplying oxygen and organic matter and a depositional environment suitable for anchoring the mussel (Davis et al 2013), or possibly that they impeded the ability of invasive macrophyte management via rototilling, thus offering the mussels refuge from this activity. Invasive macrophytes are partially managed in Okanagan Lake by rototilling.…”

Section: Geomorphic and Biotic Controls Of G Angulatamentioning

confidence: 99%

“…In river environments, important habitat characteristics include low hydraulic variability, flow refugia (i.e., boulders), stable substrate, substrate size and distribution, and low sediment accumulation (e.g., Vannote and Minshall 1982, Allen and Vaughn 2009, Daraio et al 2012, Davis et al 2013. Although some of these river characteristics and their functional significance may be transferable to understanding lake environments, river and lake environments are inherently very different.…”

Section: Introductionmentioning

confidence: 99%

“…Fine substrates are necessary for mussels to bury and to anchor successfully (Vannote and Minshall 1982), but oxygen must also be able to permeate this 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 5 substratum. In high-energy environments where water turbulence and scouring forces increase substrate mobility, stable refugia are required to protect mussels from becoming dislodged or crushed by cobble (Davis et al 2013). Thus, factors which affect substrate composition and mobility (e.g., wave action, slope) also directly or indirectly impact mussel distribution (Cyr 2009, Davis et al 2013.…”

Section: Introductionmentioning

confidence: 99%

“…In high-energy environments where water turbulence and scouring forces increase substrate mobility, stable refugia are required to protect mussels from becoming dislodged or crushed by cobble (Davis et al 2013). Thus, factors which affect substrate composition and mobility (e.g., wave action, slope) also directly or indirectly impact mussel distribution (Cyr 2009, Davis et al 2013. It is likely there will be many key factors defining the distribution of this species in lakes.…”

Section: Introductionmentioning

confidence: 99%

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Modeling Habitat Suitability for the Western Ridged Mussel (Gonidea angulata Lea) in Okanagan Lake, British Columbia, Canada

Snook¹,

Magerøy²,

Pither³

et al. 2019

Northwest Science

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Once common throughout surface waters west of the Rocky Mountains, the Western Ridged Mussel (Gonidea angulata Lea) has been extirpated throughout much of its range (Blevins et al. 2017), and is currently listed as endangered in Canada (COSEWIC 2010), where its northernmost occurrences are thought to be in Okanagan Lake within the southern interior of British Columbia. Recovery plans are legally required for listed species; but for G. angulata, recovery planning is a challenge as little is known about its habitat requirements, particularly within lakes. To be able to recover G. angulata throughout its historic range, we must study lentic as well as lotic habitats. We developed habitat suitability models for G. angulata in Okanagan Lake using snorkel survey data, habitat data, and two complementary classification methods based on the RandomForest algorithm. Both classification methods ranked the top four predictor variables as effective fetch between 1 and 2.25 km, medium-high embeddedness of substrates (25 ->75%), high proportion of sand in the substrate, and low slope (0-20 %). In comparison, G. angulata habitat in river systems have been described as having low sediment accumulation, boulders that offer refuge, low flow variability, and bank stability. These findings suggest that the drivers for G. angulata distribution in lakes are similar to those in rivers, although predictor variables themselves may vary. This is important because simply using predictor variables from lotic systems would not correctly predict G. angulata occurrence in lakes, demonstrating the importance of this lake-specific investigation.

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Section: Geomorphic and Biotic Controls Of G Angulatamentioning

confidence: 99%

Section: Geomorphic and Biotic Controls Of G Angulatamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modeling Habitat Suitability for the Western Ridged Mussel (Gonidea angulata Lea) in Okanagan Lake, British Columbia, Canada

Snook¹,

Magerøy²,

Pither³

et al. 2019

Northwest Science

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Abundance of five sympatric stream dwelling mussels varies with physical habitat

Skorupa,

Roy,

Hazelton

et al. 2024

Aquatic Conservation

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Freshwater mussel species regularly co‐occur in streams forming assemblages, but the extent of shared versus unique instream habitat features that contribute to their distribution and abundance is poorly understood. In Massachusetts, a rare species, Alasmidonta varicosa, is often found with four other species: Alasmidonta undulata, Strophitus undulatus, Margaritifera margaritifera, and Elliptio complanata, yet variation in species composition within assemblages raises questions of potential species‐specific habitat associations. Identifying species‐level habitat information is critical at a spatial scale that malacologists can use to identify translocation or restoration areas. This study investigated whether species abundance varied by mesohabitat type (riffle, run, dam pool, scour pool), instream habitat characteristics, and within‐reach location (centre versus edge). From 2016 to 2019, freshwater mussel surveys were conducted in nine streams across Massachusetts and associated habitat information was collected. Species abundances were similar across mesohabitat types. Elliptio complanata was the exception, whereby higher abundances occurred in runs and dammed pools than in riffles. Unique species relationships with habitat existed for M. margaritifera with macroalgae and emergent vegetation, and A. varicosa with heterogeneous substrate. Flow transitions, such as depositional areas that create heterogeneous substrates, may provide habitats for A. varicosa. Most mussel species were distributed with higher abundance in the river centre than the edge; E. complanata was the only species with a higher abundance at the river edge. Locations with high abundance varied based on unique relationships with pebble heterogeneity (A. varicosa), depth (A. undulata), large wood (A. undulata), and canopy closure (E. complanata). Including physical characteristics in a holistic assessment of habitat that incorporates fish and landscape attributes may further an understanding of river reaches that best support translocated and propagated freshwater mussels.

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Reducing River Flows to Control a Parasitic Salmonid Disease in the Klamath River: Simulations Question the Efficacy of Desiccation as a Management Tool

Turecek

Payton

Alexander

et al. 2021

N American J Fish Manag

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Aquatic parasites cause disease in economically and culturally important Klamath River salmonids Oncorhynchus spp., and the myxozoan parasite Ceratonova shasta has been linked to high juvenile salmonid mortality. Because C. shasta requires the freshwater annelid Manayunkia occidentalis to complete its life cycle, management approaches have focused on disrupting annelid populations to reduce C. shasta and disease risk for salmonids. Previous studies have demonstrated that manipulating river discharge to achieve short‐term, high‐flow events is effective for disturbing annelids. There is also interest in the efficacy of manipulating river discharge to desiccate annelids to reduce disease risk. To investigate the efficacy of reducing streamflow to desiccate annelids, we simulated the amount of annelid habitat, categorized by quality, that would be dewatered as discharge was incrementally reduced. Simulations were accomplished by coupling two‐dimensional hydrodynamic models with an annelid presence/absence model. Simulations were conducted for three study sites located on the Klamath River main stem downstream of Iron Gate Dam, where discharge can be manipulated. Reductions in discharge from June base flow (31.2 m3/s or 1,100 ft3/s) to the lowest simulated discharge rate (17.0 m3/s; approximately half of base flow) resulted in an 11.8% reduction of the total wetted area of the river across all three study sites combined. For the same discharge simulation, reductions in annelid habitat differed based on the quality of habitat, with low‐ quality (<0.20 probability of annelids) to moderate‐quality (0.20–0.80 probability of annelids) habitat reduced by 8.3% (95% credible interval = 7.5–10.3) and 23.7% (10.7–27.5), respectively, while high‐quality habitat (>0.80 probability of annelids) was never desiccated. These results suggest that desiccation is unlikely to offer an effective solution for managing myxozoan parasites of salmonids that are transmitted by annelids because reducing streamflow had minimal effects on the amount of annelid habitat.

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Distribution and Abundance of Freshwater Mussels in the mid Klamath Subbasin, California

Cited by 11 publications

References 34 publications

Modeling Habitat Suitability for the Western Ridged Mussel (Gonidea angulata Lea) in Okanagan Lake, British Columbia, Canada

Modeling Habitat Suitability for the Western Ridged Mussel (Gonidea angulata Lea) in Okanagan Lake, British Columbia, Canada

Abundance of five sympatric stream dwelling mussels varies with physical habitat

Reducing River Flows to Control a Parasitic Salmonid Disease in the Klamath River: Simulations Question the Efficacy of Desiccation as a Management Tool

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