1. Postdoctoral Fellow, Smithsonian Environmental Research Center, P.O. Box 28, 647 Contees Wharf Rd., Edgewater, MD 21037.
2. Associate Professor, School of Forestry and Wildlife Sciences, Auburn Univ., 3301 Forestry and Wildlife Bldg., Auburn, AL 36849 (corresponding author).
3. Juliet C. Sproul Chair for Southwest Florida Habitat Restoration and Management, Professor of Marine and Ecological Science, Everglades Wetland Research Park, Florida Gulf Coast Univ., 4940 Bayshore Dr., Naples, FL 34112.