Local and regional environmental variation influences the growth of tropical trees in selection trials in the Republic of Panama |
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| Authors: | Andrew Park Michiel van Breugel Mark S Ashton Mark Wishnie Emilio Mariscal José Deago Diogenes Ibarra Norma Cedeño Jefferson S Hall |
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| Institution: | 1. Department of Biology and Centre for Forest Interdisciplinary Research (CFIR), University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, Canada R3B 2E9;2. PRORENA, Smithsonian Tropical Research Institute, 401 Ave Roosevelt, Balboa Ancon, Panama;3. Yale School of Forestry & Environmental Studies, Sage Hall, 205 Prospect Street, New Haven, CT 06511, USA |
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| Abstract: | Native Neotropical trees are being increasingly planted for restoration purposes and timber production, but we lack species-specific data on growth responses to different regional climates and local environmental variation. We used regression trees and variance components to quantify the effects of within- and among-site environmental variation on the basal area (BA) of 21 Neotropical and two exotic tree species at three selection trials in the Republic of Panama. Sites represented distinct regional climates in which annual rainfall varied from 1100 to 2226 mm, with dry seasons of 4.1–6.7 months. Local environmental variables included measures of slope steepness and position, soil texture, soil color, and indicators of soil condition, such as subsoil rockiness. |
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| Keywords: | Local environmental variation Regional climate Neotropical trees Regression tree analysis Panama Species selection trials |
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