Myers, Jonathan A. , Chase, Jonathan M. , Jiménez, Iván , Jørgensen, Peter M. , Araujo, Alejandro , Paniagua Z, Narel Y. , Seidel, Renate .
Disentangling regional, environmental, and spatial influences on beta-diversity in temperate and tropical forests.
Turnover in species composition (beta-diversity) often increases towards the tropics. Although this pattern may reflect differences in local ecological processes between biogeographic regions, it may also reflect sampling effects owing to differences in regional species pools (gamma-diversity). Using a null-model approach that controls for gamma-diversity of woody plant communities in North (Missouri, gamma-diversity ~45 species) and South America (Bolivia, gamma-diversity ~600 species), we show that sampling effects mask the signature of environmental and spatial processes in temperate and tropical forests. Before controlling for gamma-diversity, environment and space combined explained more beta-diversity in temperate forests. After controlling for gamma-diversity, however, environment and space explained similar, and more, beta-diversity in both regions, suggesting that local ecological processes may have similar influences on community assembly in temperate and tropical forests.
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1 - Washington University in St. Louis, Department of Biology and Tyson Research Center, Campus Box 1137, One Brookings Drive, St. Louis, MO, 63130, USA
2 - Missouri Botanical Garden, St. Louis, MO, 63166, USA
3 - Museo de Historia Natural Noel Kempff Mercado, Bolivia
4 - Herbario Nacional de Bolivia, La Paz, Bolivia
5 - Universidad Mayor de San Andrés, Instituto de Ecología, La Paz, Bolivia
Presentation Type: Oral Paper:Papers for Sections
Location: Portland Room/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 9:00 AM