Institution: | Nicholas School of the Environment and Earth Sciences, Duke University Marine Lab, 135 Duke Marine Lab Road, Beaufort, NC 28516, U.S.A.; U.S. Geological Survey , Biological Resources Discipline, Columbia Environmental Research Center, Padre Island Field Research Station, c/o Padre Island National Seashore, P.O. Box 181300, Corpus Christi, TX 78480–1300, U.S.A. |