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A taxonomic comparison of local habitat niches of tropical trees |
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| Authors: | Claire A Baldeck Steven W Kembel Kyle E Harms Joseph B Yavitt Robert John Benjamin L Turner George B Chuyong David Kenfack Duncan W Thomas Sumedha Madawala Nimal Gunatilleke Savitri Gunatilleke Sarayudh Bunyavejchewin Somboon Kiratiprayoon Adzmi Yaacob Mohd N Nur Supardi Renato Valencia Hugo Navarrete Stuart J Davies Stephen P Hubbell James W Dalling |
| Institution: | 1. Program in Ecology, Evolution, and Conservation Biology, University of Illinois, 505 S. Goodwin Ave., Urbana, IL, 61801, USA 2. Department of Plant Biology, University of Illinois, 265 Morrill Hall, 505 S. Goodwin Ave., Urbana, IL, 61801, USA 3. Département des sciences biologiques, Université du Québec à Montréal, C.P. 8888, Succ. Centre-ville, Montréal, QC, H3C3P8, Canada 4. Smithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancón, Republic of Panama 5. Department of Biological Sciences, Louisiana State University, 202 Life Sciences Building, Baton Rouge, LA, 70803, USA 6. Department of Natural Resources, Cornell University, 16 Fernow Hall, Ithaca, NY, 14853, USA 7. Indian Institute of Science Education and Research, P.O. BCKV Campus Main Office, Mohanpur, Nadia, West Bengal, 741252, India 8. Department of Plant and Animal Sciences, University of Buea, P.O. Box 63, Buea, Republic of Cameroon 9. Center for Tropical Forest Science, Arnold Arboretum Asia Program, Harvard University, Cambridge, MA, USA 10. Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, 97331-2902, USA 11. Department of Botany, Faculty of Science, University of Peradeniya, Peradeniya, 20400, Sri Lanka 12. National Parks, Wildlife, and Plant Conservation Department, Chatuchak, Bangkok, 10900, Thailand 13. Faculty of Science and Technology, Thammasat University (Rangsit), Klongluang, Patumtani, 12121, Thailand 14. Faculty of Plantation and Agrotechnology, University Technology MARA, Shah Alam, Selangor, 40450, Malaysia 15. Forest Environment Division, Forest Research Institute Malaysia, Kepong, Selangor Darul Ehsan, 52109, Malaysia 16. Laboratorio de Ecología de Plantas y Herbario QCA, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Apartado, 17-01-2184, Quito, Ecuador 17. Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, 90095, USA |
| Abstract: | The integration of ecology and evolutionary biology requires an understanding of the evolutionary lability in species’ ecological niches. For tropical trees, specialization for particular soil resource and topographic conditions is an important part of the habitat niche, influencing the distributions of individual species and overall tree community structure at the local scale. However, little is known about how these habitat niches are related to the evolutionary history of species. We assessed the relationship between taxonomic rank and tree species’ soil resource and topographic niches in eight large (24–50 ha) tropical forest dynamics plots. Niche overlap values, indicating the similarity of two species’ distributions along soil or topographic axes, were calculated for all pairwise combinations of co-occurring tree species at each study site. Congeneric species pairs often showed greater niche overlap (i.e., more similar niches) than non-congeneric pairs along both soil and topographic axes, though significant effects were found for only five sites based on Mantel tests. No evidence for taxonomic effects was found at the family level. Our results indicate that local habitat niches of trees exhibit varying degrees of phylogenetic signal at different sites, which may have important ramifications for the phylogenetic structure of these communities. |
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