Restoration of coral populations in light of genetic diversity estimates |
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Authors: | T L Shearer I Porto A L Zubillaga |
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Institution: | (1) School of Biology, Georgia Institute of Technology, 310 Ferst Dr., Atlanta, GA 30332-0230, USA;(2) Depto. Ciencias Biológicas, Universidad de los Andes, Carrera 1No 18A 10, Bogotá, Colombia;(3) Depto. Biología de Organismos, Universidad Simón Bolívar, Apartado 1080-A, Caracas, Venezuela |
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Abstract: | Due to the importance of preserving the genetic integrity of populations, strategies to restore damaged coral reefs should
attempt to retain the allelic diversity of the disturbed population; however, genetic diversity estimates are not available
for most coral populations. To provide a generalized estimate of genetic diversity (in terms of allelic richness) of scleractinian
coral populations, the literature was surveyed for studies describing the genetic structure of coral populations using microsatellites.
The mean number of alleles per locus across 72 surveyed scleractinian coral populations was 8.27 (±0.75 SE). In addition,
population genetic datasets from four species (Acropora palmata, Montastraea cavernosa, Montastraea faveolata and Pocillopora damicornis) were analyzed to assess the minimum number of donor colonies required to retain specific proportions of the genetic diversity
of the population. Rarefaction analysis of the population genetic datasets indicated that using 10 donor colonies randomly
sampled from the original population would retain >50% of the allelic diversity, while 35 colonies would retain >90% of the
original diversity. In general, scleractinian coral populations are genetically diverse and restoration methods utilizing
few clonal genotypes to re-populate a reef will diminish the genetic integrity of the population. Coral restoration strategies
using 10–35 randomly selected local donor colonies will retain at least 50–90% of the genetic diversity of the original population.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
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Keywords: | Reef restoration Conservation genetics Genetic diversity Scleractinian coral Microsatellite Rarefaction |
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