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      Ocupación y abundancia de aves rapaces nocturnas (Strigidae) en la Reserva de la Biosfera Selva El Ocote, Chiapas, México Translated title: Occupancy and abundance of nocturnal raptors (Strigidae) in the Selva El Ocote Biosphere Reserve, Chiapas, Mexico

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          Abstract

          Evaluar la proporción de sitios ocupados explica la distribución espacial de los individuos dentro de una comunidad y es importante para desarrollar estrategias de conservación. En este estudio se evalúan los patrones de ocupación y abundancia de 5 especies de aves rapaces nocturnas en 2 sitios con diferentes niveles de heterogeneidad (estructura y composición del paisaje) en la Reserva de la Biosfera Selva El Ocote. Se utilizaron puntos de conteo y provocación auditiva para estimar índices de ocupación y abundancia y modelos lineales generalizados para determinar las posibles relaciones entre los índices estimados y los atributos estructurales del hábitat. La variación espacial de los patrones de ocupación y abundancia se explica por la estructura del hábitat (i.e., altura de árboles, área basal, distancia con asentamientos humanos y áreas abiertas) a escala local, y por la heterogeneidad (2 o más tipos de coberturas) en el paisaje. Dado que se encontraron relaciones especie-específicas con los atributos del bosque tropical perennifolio, es recomendable promover el manejo diversificado y sustentable del paisaje que favorezca la presencia de áreas extensas con cobertura forestal y por lo tanto la persistencia de especies amenazadas asociadas al interior del bosque.

          Translated abstract

          Evaluation of occupancy explains the spatial distribution of species in the community and is important to develop conservation strategies. We evaluated occupancy and abundance patterns of nocturnal raptors in 2 sites with different level of heterogeneity (landscape structure and composition) in the Selva El Ocote Biosphere Reserve. Through point counts and owl playback callings we estimate occupancy and abundance patterns. We explored possible relationships between patterns of recorded species and structural habitat attributes using generalized linear models. Occupancy and abundance spatial variation was explained by structural habitat characteristics (i.e., tree height, distance to human settlements and open areas) at local scale, and spatial heterogeneity (2 or more habitats) at landscape scale. We found species-specific relationships with old growth forest attributes, so we suggest a sustainable landscape management that promotes old growth forest conservation and thus persistence of threatened forest species.

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          Diversity in tropical rain forests and coral reefs.

          The commonly observed high diversity of trees in tropical rain forests and corals on tropical reefs is a nonequilibrium state which, if not disturbed further, will progress toward a low-diversity equilibrium community. This may not happen if gradual changes in climate favor different species. If equilibrium is reached, a lesser degree of diversity may be sustained by niche diversification or by a compensatory mortality that favors inferior competitors. However, tropical forests and reefs are subject to severe disturbances often enough that equilibrium may never be attained.
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            Biostatistical Analysis

            Designed for one/two-semester, junior/graduate-level courses in Biostatistics, Biometry, Quantitative Biology, or Statistics, the latest edition of this best-selling biostatistics text is both comprehensive and easy to read. It provides a broad and practical overview of the statistical analysis methods used by researchers to collect, summarize, analyze, and draw conclusions from biological research data. The Fourth Edition can serve as either an introduction to the discipline for beginning students or a comprehensive procedural reference for today's practitioners.
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              Vegetación de México

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rmbiodiv
                Revista mexicana de biodiversidad
                Rev. Mex. Biodiv.
                Instituto de Biología (México )
                2007-8706
                September 2012
                : 83
                : 3
                : 742-752
                Affiliations
                [1 ] El Colegio de la Frontera Sur Mexico
                [2 ] El Colegio de la Frontera Sur Mexico
                Article
                S1870-34532012000300013
                10.7550/rmb.21364
                66d0b0d8-9916-4594-b385-038477e09e2b

                http://creativecommons.org/licenses/by/4.0/

                History
                Categories
                Biodiversity Conservation

                Animal science & Zoology
                heterogeneity,landscape,optimal habitat,persistence,species,heterogeneidad,paisaje,hábitat óptimo,persistencia,especies

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