Journal Title
Title of Journal: Plant Ecol
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Abbravation: Plant Ecology
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Publisher
Springer Netherlands
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Authors: Cíntia Gomes de Freitas Cristian de Sales Dambros Wolf Lukas Eiserhardt Flávia Regina Capellotto Costa JensChristian Svenning Henrik Balslev
Publish Date: 2014/07/04
Volume: 215, Issue: 10, Pages: 1173-1185
Abstract
The concepts of phylogenetic community structure PCS and phylogenetic niche conservatism PNC allow ecologists to address the role of species’ evolutionary history in community assembly It is important to test the role of historical legacies relative to environmental constraints at local scales where communities are assembled We studied phylogenetic structure and niche conservatism for palms Arecaceae in the 64km2 Ducke Reserve in the central Amazon near Manaus The 72 study plots each covering 01 ha were distributed regularly in a terra firme forest along a hydroedaphic gradient We compared the observed palm PCS with assemblages generated by null models We also analyzed whether morphological and ecological traits are labile or conserved along the phylogeny and quantified the spatial structure of morphological traits in each plot We found an overall neutral PCS in combination with low PNC labile traits suggesting that evolutionary history poses little constraint on palm community assembly in this Amazonian landscape Still there was a tendency towards phylogenetic overdispersion in bottomlands suggesting competitive exclusion among close relatives or more likely environmental filtering acting on convergent traits that affect cooccurrence in floodprone areas We conclude that 1 PCS of local communities is random as a whole and morphological traits are overall labile but that 2 the hydroedaphic gradient within terra firme forests leads to differences in species cooccurrence so that closely related species occur less often than expected in bottomlands due to diffuse competition among close relatives or environmental filtering on convergent traitsWe thank the Programa de Pesquisas em Biodiversidade PPBio and INPA for logistic support the CNPq 575637/20080 473474/20085 for financial support and CAPES/PDEE for a doctoral scholarship to CGF We also thank Jean Louis Guillaumet for the palm database HB’s and JCS’s work on palms is supported by grants from the Danish Natural Science Research Council 10083348 10083348 12125079 and from the European Commission Contract No 212631
Keywords:
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