Forest fragmentation genetics in a formerly widespread island endemic tree:Vateriopsis seychellarum(Dipterocarpaceae)
| Autor: | Aline Finger, James Mougal, Terence Valentin, Christopher N. Kaiser-Bunbury, Chris J. Kettle, Jaboury Ghazoul |
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| Rok vydání: | 2012 |
| Předmět: |
0106 biological sciences
Conservation genetics 0303 health sciences Dipterocarpaceae Population fragmentation Genetic diversity Habitat fragmentation biology Ecology Small population size 15. Life on land biology.organism_classification 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Population bottleneck Genetic structure Genetics Ecology Evolution Behavior and Systematics 030304 developmental biology |
| Zdroj: | Molecular Ecology. 21:2369-2382 |
| ISSN: | 0962-1083 |
| DOI: | 10.1111/j.1365-294x.2012.05543.x |
| Popis: | Habitat fragmentation and changed land use have seriously reduced population size in many tropical forest tree species. Formerly widespread species with limited gene flow may be particularly vulnerable to the negative genetic effects of forest fragmentation and small population size. Vateriopsis seychellarum (Dipterocarpaceae) is a formerly widespread canopy tree of the Seychelles, but is now reduced to 132 adult individuals distributed in eleven sites. Using ten microsatellite loci, a genetic inventory of all adult trees and a sample of 317 progeny, we demonstrate that despite its restricted range, overall genetic diversity was relatively high (H(E) : 0.56). The juvenile cohort, however, had significantly lower allelic richness (adults R(S) : 3.91; juveniles R(S) : 2.83) and observed heterozygosity than adult trees (adults H(O) : 0.62; juveniles H(O) : 0.48). Rare alleles were fewer and kinship between individuals was stronger in juveniles. Significant fine-scale spatial genetic structure was observed in remnant adults, and parentage analysis indicated that more than 90% of sampled progeny disperse |
| Databáze: | OpenAIRE |
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