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Stream channel geomorphology influences mussel abundance in southern Appalachian streams, U.S.A.
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We quantified freshwater mussel abundance and species richness and their physical habitat at 24 sites in eight streams in southern Appalachian catchments in 2000 and 2001. In addition, we modelled site-specific hydraulic parameters during summer baseflow and bankfull stages to estimate high- and low-discharge conditions, respectively.
Mussel abundance was related to stream geomorphology, whereas richness was related to stream size. Baseflow habitat parameters explained only minor variation in abundance or richness, and both measures were highly correlated with mean current velocity or stream size. Bankfull shear stress composed a relatively low proportion of overall mussel habitat variability, but it accounted for significant variation in abundance and richness. Mussel abundance was highly variable at sites subject to low-shear stress during spates, whereas abundance always was low at sites subject to high-shear stress. These data suggest that habitat conditions during floods, rather than those at summer baseflow, limit the abundance of mussels in Appalachian streams. These data also suggest that mussel abundance and assemblage structure may be sensitive to any changes in channel geomorphology and hydraulic conditions that might result from land use in the catchment.
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General Resources Holdings
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Freshwater Mussels of the Powell River, Virginia and Tennessee: Abundance and Distribution in a Biodiversity Hotspot
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Historically, the Powell River had a diverse freshwater mussel fauna of 46 species. Various surveys conducted over the past century have recorded a decline in mussel densities and diversity throughout much of the river, due to historical and on-going anthropogenic impacts. In 2008 and 2009, random timed-search, systematic search, and quadrat sampling of 21 sites were completed to document species richness, relative abundance, density, and size-class structure of resident mussel populations. We recorded 19 species from 18 sites, including 5 endangered species during quadrat sampling efforts. he mussel fauna of the lower Powell River continues to represent one of the most diverse in the United States. Outside of the Powell River, only 2 or 3 populations remain for most of the listed species extant in the river. Given these qualities, the Powell River deserves recognition as a location for focused conservation efforts to protect its diverse mussel assemblage.
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Resources
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General Resources Holdings
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Ohio River Basin FHP Overview and Strategy
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This presentation provides a general overview of the ORBFHP. It includes information on the regional partnership's mission, the region in which they are targeting their conservation work, the types of rivers and streams they are focusing on, and the strategies they are using to combat threats to the Basin.
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Resources
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General Resources Holdings
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ORBFHP
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WLFW Pollinator Conservation Series: Session #5 SWAP & Listed Species in the Southeast
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Session 5 of WLFW Pollinator Conservation Webinar series, presented by Celia Vuocolo, WLFW Pollinator Coordinator-East with Quail Forever & USDA-NRCS. Topics covered include an overview of a selection of State Wildlife Action Plan SGCNs and federal/state listed pollinator species. Conservation planning strategies for planners and biologists.
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Upload New Resources
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Florida Natural Areas Inventory
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The Florida Natural Areas Inventory (FNAI) is administered by the Institute of Science and Public Affairs at Florida State University. We are dedicated to gathering, interpreting, and disseminating information critical to the conservation of Florida's biological diversity. FNAI was founded in 1981 as a member of The Nature Conservancy's international network of natural heritage programs, now coordinated by NatureServe. Funding is provided through contracts and grants, which currently include work for the Florida Department of Environmental Protection, the Florida Fish and Wildlife Conservation Commission, and other state and federal agencies.
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LP Members
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Organizations Search
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Salamanders - The Hidden Jewels of Appalachia
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If you want to hit paydirt the Appalachian region is the world’s salamander El Dorado—home to over 70 salamander species. The Appalachian region of the eastern United States is the world's epicenter for salamander biodiversity.
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Training
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Videos and Webinars
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Conservation Strategy for Imperiled Aquatic Species in the UTRB
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The Strategy provides guidance to Field Offices in reevaluating current ("status quo") conservation approaches in order to deliver the most cost effective approach toward the conservation and management of imperiled freshwater fish and mussel species in the Upper Tennessee River Basin.
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The Strategy
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Map of Federally Listed Species within the UTRB in Tennessee
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Map of Listed and candidate aquatic species in the Upper Tennessee hydrologic sub-unit of Tennessee.
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Maps
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Three new darter species of the Etheostoma percnurum species complex (Percidae, subgenus Catonotus) from the Tennessee and Cumberland River Drainages
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The federally endangered Duskytail Darter, Etheostoma percnurum Jenkins, is known from only six highly disjunct populations in the Tennessee and Cumberland river drainages of Kentucky, Tennessee, and Virginia. Only four are extant. Variation in morphology including meristics, morphometrics, and pigmentation was examined among the four extant populations and limited specimens from the two extirpated populations (Abrams Creek and South Fork Holston River). Analyses of these data found each of the extant populations is morphologically diagnosable. The few specimens avail- able from Abrams Creek and South Fork Holston River prevented thorough assessment of variation, and these were grouped with their closest geographic counterparts, Citico Creek, and Little River, respectively. Three new morphologi- cally diagnosable species are described: E. sitikuense, the Citico Darter, from Citico Creek, Abrams Creek, and Tellico River (Tennessee River system); E. marmorpinnum, the Marbled Darter, from the Little River and South Fork Holston River (Tennessee River system); and E. lemniscatum, the Tuxedo Darter, from the Big South Fork (Cumberland River system). Each species warrants federal protection as an endangered species.
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Reports & Documents
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Appalachian Mountains Joint Venture Management Board Meeting
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This meeting will provide board members with updates on the AMJV staff, administration, and the presentation of a strategic communications plan.
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News & Events
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Events
