The effects of exposure to copper (Cu) on tissue Cu accumulation, on hemolymph osmotic, Na+ and Cl- regulation, and on gill Na+/K+-ATPase (NKA) and carbonic anhydrase (CA) activities were evaluated in the fiddler crab Minuca rapax. Waterborne copper was delivered to the crabs at one of three salinities (seawater at 25‰ salinity [S] = isosmotic control; distilled water [<0.1‰ S] = hypo-osmotic m...

Woody plant encroachment (the replacement of grasses and forbs by woody shrubs trees) is reshaping communities in both terrestrial coastal environments, but little known about its effects on basal consumers. We used interactions between fiddler crabs (Uca spp.) the encroaching mangrove Avicennia germinans Gulf Mexico salt marshes to explore trophic consumers shrubs. In a series food preference ...