Geological Survey

Description

The U.S. Geological Survey¿s (USGS) National Wildlife Health Center is offering a funding opportunity to a CESU partner to assist with Sea star wasting disease (SSWD). SSWD comprises a suite of gross morphological abnormalities, including ray twisting, loss of turgor, limb autotomy, formation of lesions, tissue loss and death that affects asteroids (Echinodermata) in several locations worldwide. Since 2013, SSWD has been reported in ~ 20 species on the North American Pacific coast, leading in some locations to >95% reduction in overall biomass of key species (e.g. Pycnopodia helianthoides). The etiology of SSWD is unknown and there is currently no case definition for any species affected. Comparative histology of clinically normal and wasting individuals in North America and elsewhere revealed vacuolized and necrotic outer epidermis and cuticle, and edema and cleft formation between outer epidermis and mutable collagenous tissue. Microbiome (bacterial/archaeal and viral) revealed no consistent associated microorganisms to this condition. However, shifts in subcuticular microbiome structure from predominately aerobic to obligate anaerobic taxa occur during disease progression, and perhaps global warming and acidification play a role.

Who can apply

• Others

Contact

Faith Graves 703-648-7356<br/>fgraves@usgs.gov
fgraves@usgs.gov