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Gradients of genetic diversity and differentiation across the distribution range of a Mediterranean coral: Patterns, processes and conservation implications
- Source :
- DIVERSITY AND DISTRIBUTIONS, Digital.CSIC. Repositorio Institucional del CSIC, instname, Diversity and Distributions, Diversity and Distributions, In press, ⟨10.1111/ddi.13382⟩, Diversity and Distributions, Wiley, In press, ⟨10.1111/ddi.13382⟩, Dipòsit Digital de la UB, Universidad de Barcelona
- Publication Year :
- 2021
-
Abstract
- 20 pages, 5 figures, 4 tables, supporting information https://doi.org/10.1111/ddi.13382.-- Data availability statement: Microsatellite genotypes are available on Dryad (DOI https://doi.org/10.5061/dryad.xgxd254gw)<br />Aim: How historical and contemporary eco-evolutionary processes shape the patterns of genetic diversity and differentiation across species’ distribution range remains an open question with strong conservation implications. Focusing on the orange stony coral, Astroides calycularis, we (a) characterized the pattern of neutral genetic diversity across the distribution range; (b) gave insights into the underlying processes; and (c) discussed conservation implications with emphasis on a national park located on a hotspot of genetic diversity. Location: South Mediterranean Sea and Zembra National Park. Methods: We combined new data from 12 microsatellites in 13 populations located in the Centre and in the Western Periphery of the distribution range with a published dataset including 16 populations from the Western and Eastern Peripheries. We analysed the relationship among parameters of genetic diversity (He, Ar(g)) and structure (population-specific FST) and two measures of geographic peripherality. We compared two estimators of pairwise genetic structure (GST, DEST) across the distribution range. The evolutionary and demographic history of the populations following the Last Glacial Maximum was reconstructed using approximate Bayesian computations and maximum-likelihood analyses. We inferred the contemporary connectivity among populations from Zembra National Park and with the neighbouring area of Cap Bon. Results: We demonstrate a decrease in genetic diversity and an increase in genetic differentiation from the Centre to the Eastern and Western Peripheries of the distribution range. Populations from Zembra show the highest genetic diversity reported in the species. We identified a spillover effect towards Cap Bon. Main conclusions: The patterns of genetic diversity and differentiation are most likely explained by “the postglacial range expansion hypothesis” rather than the “central–peripheral hypothesis.” Enforcement of conservation measures should be considered to protect this genetic diversity pattern, in particular when considering the low effective population size inferred at many sites<br />JBL was funded by a Postdoctoral Grant (SFRH/BPD/74400/2010) from the Portuguese Foundation for Science and Technology (FCT). This research was supported by national funds through FCT within the scope of UIDB/04423/2020 and UIDP/04423/2020 and by the MIMOSA project funded by the Foundation Prince Albert II Monaco. JG, DGG and PL acknowledge the funding of the Spanish government through the “Severo Ochoa Centre of Excellence” accreditation (CEX2019-000928-S). This work was partially supported by the European Union's Horizon 2020 research and innovation program under grant agreement SEP-210597628 (FutureMARES)
- Subjects :
- 0106 biological sciences
Mediterranean climate
Postglacial range expansion hypothesis
Range (biology)
Coral
marine protected area
[SDV]Life Sciences [q-bio]
Distribution (economics)
Biology
010603 evolutionary biology
01 natural sciences
genetic gradient
03 medical and health sciences
Mediterranean sea
postglacial range expansion hypothesis
Central-peripheral hypothesis
Marine protected areas
Mediterranean Sea
14. Life underwater
coral
Ecology, Evolution, Behavior and Systematics
Coralls
030304 developmental biology
Marine Protected Area
0303 health sciences
Genetic diversity
Mediterrània (Mar)
business.industry
Ecology
15. Life on land
Genetic gradient
central-peripheral hypothesis
Corals
Marine protected area
business
human activities
Àrees marines protegides
Subjects
Details
- Language :
- English
- ISSN :
- 13669516 and 14724642
- Database :
- OpenAIRE
- Journal :
- DIVERSITY AND DISTRIBUTIONS, Digital.CSIC. Repositorio Institucional del CSIC, instname, Diversity and Distributions, Diversity and Distributions, In press, ⟨10.1111/ddi.13382⟩, Diversity and Distributions, Wiley, In press, ⟨10.1111/ddi.13382⟩, Dipòsit Digital de la UB, Universidad de Barcelona
- Accession number :
- edsair.doi.dedup.....bb23623595df7662ca0c8f49980a71d1