Distribution and Community Assembly of Trees Along an Andean Elevational Gradient
| Autor: | Renato Valencia, Jennifer M. Cruse-Sanders, Rosa A. Jiménez Paz, Álvaro J. Pérez, Kevin S. Burgess, Alex Reynolds, Samantha J. Worthy, John A. Barone |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Plant Science Biology 010603 evolutionary biology 01 natural sciences Article 03 medical and health sciences Phylogenetics montane forests tree diversity lcsh:Botany Dominance (ecology) Ecology Evolution Behavior and Systematics community phylogenetics 030304 developmental biology 0303 health sciences Ecology Phylogenetic tree taxonomic metrics Species diversity lcsh:QK1-989 Phylogenetic diversity Taxon Evolutionary biology Species evenness Species richness Ecuador |
| Zdroj: | Plants, Vol 8, Iss 9, p 326 (2019) Plants Volume 8 Issue 9 |
| ISSN: | 2223-7747 |
| Popis: | Highlighting patterns of distribution and assembly of plants involves the use of community phylogenetic analyses and complementary traditional taxonomic metrics. However, these patterns are often unknown or in dispute, particularly along elevational gradients, with studies finding different patterns based on elevation. We investigated how patterns of tree diversity and structure change along an elevation gradient using taxonomic and phylogenetic diversity metrics. We sampled 595 individuals (36 families 53 genera 88 species) across 15 plots along an elevational gradient (2440&ndash 3330 m) in Ecuador. Seventy species were sequenced for the rbcL and matK gene regions to generate a phylogeny. Species richness, Shannon&ndash Weaver diversity, Simpson&rsquo s Dominance, Simpson&rsquo s Evenness, phylogenetic diversity (PD), mean pairwise distance (MPD), and mean nearest taxon distance (MNTD) were evaluated for each plot. Values were correlated with elevation and standardized effect sizes (SES) of MPD and MNTD were generated, including and excluding tree fern species, for comparisons across elevation. Taxonomic and phylogenetic metrics found that species diversity decreases with elevation. We also found that overall the community has a non-random phylogenetic structure, dependent on the presence of tree ferns, with stronger phylogenetic clustering at high elevations. Combined, this evidence supports the ideas that tree ferns have converged with angiosperms to occupy the same habitat and that an increased filtering of clades has led to more closely related angiosperm species at higher elevations. |
| Databáze: | OpenAIRE |
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