1. Department of Recreation, Park and Tourism Management, and Anthropology, Pennsylvania State University, University Park, State College, PA 16802, USA
2. Department of Recreation, Park and Tourism Management, Pennsylvania State University, University Park, State College, PA 16802, USA
3. Charles Darwin Research Station, Charles Darwin Foundation, Santa Cruz, Galapagos 200102, Ecuador
4. Department of Geography, Pennsylvania State University, University Park, State College, PA 16802, USA