Community assembly of the ferns of Florida
Autor: | Daijiang Li, Sally M. Chambers, Lauren B. Trotta, Lorena Endara, Benjamin Baiser, Emily B. Sessa, J. Gordon Burleigh |
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Rok vydání: | 2017 |
Předmět: |
0106 biological sciences
Chloroplasts Adaptation Biological Plant Science 010603 evolutionary biology 01 natural sciences Models Biological Species Specificity Phylogenetics Genetics Ecology Evolution Behavior and Systematics Ecosystem Phylogeny Plant Physiological Phenomena Spatial Analysis Phylogenetic tree biology Ecology Water Biodiversity biology.organism_classification Biological Evolution Phylogenetic diversity Taxon Phenotype Habitat Evolutionary biology Spatial ecology Ferns Florida Fern Species richness Germ Cells Plant 010606 plant biology & botany |
Zdroj: | American journal of botany. 105(3) |
ISSN: | 1537-2197 |
Popis: | PREMISE OF THE STUDY Many ecological and evolutionary processes shape the assembly of organisms into local communities from a regional pool of species. We analyzed phylogenetic and functional diversity to understand community assembly of the ferns of Florida at two spatial scales. METHODS We built a phylogeny for 125 of the 141 species of ferns in Florida using five chloroplast markers. We calculated mean pairwise dissimilarity (MPD) and mean nearest taxon distance (MNTD) from phylogenetic distances and functional trait data for both spatial scales and compared the results to null models to assess significance. KEY RESULTS Our results for over vs. underdispersion in functional and phylogenetic diversity differed depending on spatial scale and metric considered. At the county scale, MPD revealed evidence for phylogenetic overdispersion, while MNTD revealed phylogenetic and functional underdispersion, and at the conservation area scale, MPD revealed phylogenetic and functional underdispersion while MNTD revealed evidence only of functional underdispersion. CONCLUSIONS Our results are consistent with environmental filtering playing a larger role at the smaller, conservation area scale. The smaller spatial units are likely composed of fewer local habitat types that are selecting for closely related species, with the larger-scale units more likely to be composed of multiple habitat types that bring together a larger pool of species from across the phylogeny. Several aspects of fern biology, including their unique physiology and water relations and the importance of the independent gametophyte stage of the life cycle, make ferns highly sensitive to local, microhabitat conditions. |
Databáze: | OpenAIRE |
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