Integration of Spatial and Ecological Data in Evolutionary Studies
Struwe, Lena , Smouse, Peter E. , Lathrop, Richard G. .
Biogeography and environmental response through time using spatial evolutionary and ecological vicariance analysis (SEEVA) in neotropical gentians.
The new research method SEEVA is used to analyze biogeographic and ecological vicariance patterns in three gentian groups: Tachia, Potalia, and Senaea/Prepusa, all endemic to the Neotropics. Phylogenetic information from combined morphological and molecular data, detailed geolocated collections, and GIS-derived environmental data on soils, bedrock, vegetation type, climate, and elevation was analyzed in an integrated way. Tachia and Potalia are largely distributed in the Amazon basin, the Guianas, and the foothills of the Andes. Prepusa and Senaea are restricted to the southeastern part of Brazil. The SEEVA results from the Amazon basin and other wetter tropical areas show that specific environmental variables are correlated with the speciation within evolutionary lineages, and that climate and soils appear to have high significance in separating deeper lineages. Within the Prepusa and Senaea lineage, recent speciation does not show significant ecological vicariance, but relatively older events are associated with different soil types and climate.
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Gentian Research Network
1 - Rutgers University, Ecology, Evolution, & Natural Resources, 14 College Farm Rd, New Brunswick, New Jersey, 08901, USA
2 - Rutgers University, Center for Remote Sensing and Spatial Analysis, 14 College Farm Road, New Brunswick, New Jersey, 08901, USA
Presentation Type: Symposium or Colloquium Presentation
Location: Stevens 2/Hilton
Date: Wednesday, July 11th, 2007
Time: 9:15 AM