Greg Cope, NC State University
Tom Kwak, USGS NC Cooperative Fish and Wildlife Research Unit
Proposed Project Completion: September 2021
Implements Science Plan Theme: Impacts and Adaptation
Project Cooperators: Sarah McRae (US FWS), Todd Ewing (NC Wildlife Resources Commission), Brian Watson (VA Dept of Game and Inland Fisheries), Robert Bringolf (U. Georgia)
The Southeastern and Mid-Atlantic regions of the United States contain the greatest biodiversity of native freshwater mussels in the world, but they are highly imperiled due to habitat alteration and destruction, pollution and poor water quality, and the introduction of aquatic invasive species. Now they are at even greater risk from the stresses associated with climate change induced sea level rise and its associated changes in salinity, temperature, and stream flow.
This project investigates the potential vulnerability and adaptation of a native freshwater mussel, the Tidewater Mucket, in coastal river systems and offer solutions for its conservation. Scientists have recently discovered a population of these mussels in a reservoir along the North Carolina-Virginia border that have been isolated from their native riverine habitat and associated natural fluctuations in salinity for over 50 years. These mussels have apparently adapted to the relatively high temperatures, low flow, and low salinity of a reservoir environment, whereas their native counterpart populations located in the downstream portions of coastal rivers that have adapted to withstand exposures to salinity and altered flows, are declining. Federal and state resource managers would like to know how these native coastal plain mussel populations will respond to larger and longer durations of salinity incursions like those predicted with sea level rise.