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      Evaluation of gamma diversity of reef corals (Scleractinia) in the Mexican Pacific Translated title: Evaluación de la diversidad gama de corales arrecifales (Scleractinia) en el Pacífico de México

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          Abstract

          In order to assess gamma diversity of hermatypic corals, maximum likelihood methods (Chao, Jacknife) and resampling (bootstrap) were used over a database with 3 423 records of corals from 15 regions of the Mexican Pacific. Analysis were conducted for the species richness (34 species) and for the 5 families reported. Results suggest that species richness might be underestimated up to 25% as well as for the families Pocilloporidae, Poritidae, and Agariciidae. On the other hand, richness observed for Siderastreidae and Fungiidae is not significantly different from expected. According to rare species distribution and historical records in the Mexican Pacific, it is expected that new records will come either from the Revillagigedo, southern region of the Baja California Peninsula or adjacent mainland (Sonora) and Oaxaca coast. This kind of analysis is fundamental in order to optimize sampling efforts and to establish marine protected areas that protect known and potential species richness.

          Translated abstract

          Con el fin de evaluar el conocimiento de la diversidad regional de corales zooxantelados, se aplicaron métodos de máxima verosimilitud (chao, jacknife) y remuestreo (bootstrap) sobre una base de datos de 3 423 registros, ordenada en 15 áreas geográficas del Pacífico mexicano. Los análisis se hicieron para la riqueza específica total (34 especies) y las 5 familias de corales conocidas y se contrastaron con los valores esperados, considerando todas las especies reportadas para el Pacífico oriental. La riqueza conocida de especies de corales zooxantelados posiblemente esté subestimada hasta en un 25%, al igual que en el caso de las familias Pocilloporidae, Poritidae y Agariciidae, mientras que para Siderastreidae y Fungiidae no hay diferencias entre los valores esperados y los observados. Considerando el área de distribución de las especies raras en el litoral oeste de México y el historial de registros, se sugiere que las próximas especies a encontrarse posiblemente aparezcan en la zona de las islas Revillagigedo, en la parte sur de la península de Baja California o la zona continental adyacente (Sonora) y en las costas de Oaxaca. Este tipo de análisis son fundamentales para la optimización del esfuerzo de muestreo y para el establecimiento de áreas naturales protegidas que salvaguarden la biodiversidad conocida y potencial.

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          Marine Ecoregions of the World: A Bioregionalization of Coastal and Shelf Areas

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            Coral reefs under rapid climate change and ocean acidification.

            Atmospheric carbon dioxide concentration is expected to exceed 500 parts per million and global temperatures to rise by at least 2 degrees C by 2050 to 2100, values that significantly exceed those of at least the past 420,000 years during which most extant marine organisms evolved. Under conditions expected in the 21st century, global warming and ocean acidification will compromise carbonate accretion, with corals becoming increasingly rare on reef systems. The result will be less diverse reef communities and carbonate reef structures that fail to be maintained. Climate change also exacerbates local stresses from declining water quality and overexploitation of key species, driving reefs increasingly toward the tipping point for functional collapse. This review presents future scenarios for coral reefs that predict increasingly serious consequences for reef-associated fisheries, tourism, coastal protection, and people. As the International Year of the Reef 2008 begins, scaled-up management intervention and decisive action on global emissions are required if the loss of coral-dominated ecosystems is to be avoided.
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              Evolution and Measurement of Species Diversity

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                Author and article information

                Journal
                rmbiodiv
                Revista mexicana de biodiversidad
                Rev. Mex. Biodiv.
                Instituto de Biología (México, DF, Mexico )
                1870-3453
                2007-8706
                April 2010
                : 81
                : 1
                : 113-121
                Affiliations
                [03] Puerto Ángel Oaxaca orgnameUniversidad del Mar orgdiv1Instituto de Recursos México
                [04] Puerto Vallarta Jalisco orgnameUniversidad de Gudalajara orgdiv1Centro Universitario de la Costa México
                [01] La Paz Baja California Sur orgnameUniversidad Autónoma de Baja California Sur orgdiv1Departamento de Biología Marina México
                [02] Ensenada Baja California orgnameCentro de Investigación Científica y de Educación Superior de Ensenada México
                [05] Sheffield orgnameUniversity of Sheffield orgdiv1Department of Animal and Plant Sciences United Kingdom
                Article
                S1870-34532010000100016 S1870-3453(10)08100100016
                49898b26-e096-418f-9e62-fabd70d18816

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 09 December 2008
                : 09 October 2009
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 33, Pages: 9
                Product

                SciELO Mexico

                Categories
                Ecology

                Ecology
                bootstrap,máxima verosimilitud,métodos no paramétricos,biodiversidad,maximum likelihood,non-parametric methods,biodiversity

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