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      Distribución espacial y temporal en un gradiente de sucesión de la fauna de coleópteros coprófagos (Scarabaeinae, Aphodiinae) en un bosque tropical montano, Nariño - Colombia

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          Abstract

          Se realizó un monitoreo a lo largo de 1993 en tres tipos de hábitat en la zona de influencia de la Reserva Natural la Planada (Nariño - Colombia): bosque primario, bosque secundario y pastizal. Se capturó 9 115 individuos pertenecientes a 18 especies y a 11 géneros. Se capturó un mayor número de especies (F 2, 9 = 29.88; P < 0.001) e individuos (F 2, 9 = 36.22; P < 0.001) en bosque primario que en bosque secundario y pastizal. Igualmente, se encontraron diferencias en la riqueza y la abundancia de las especies entre sitios de muestreo en el interior de cada hábitat. Los análisis de agrupamiento muestran que la composición de especies varía entre los hábitats con cobertura boscosas y zonas abiertas. En el bosque primario y en el bosque secundario, la proporción de individuos de hábitos cavadores y rodadores fueron similares, con el predominio de especies de actividad nocturna, mientras que en pastizal, desaparecieron los rodadores y se incrementaron las especies con actividad diurna. No se encontró una relación entre la precipitación y la riqueza de especies (r² = 0.26; P = 0.41), ni entre la precipitación y el número de individuos capturados a lo largo del año (r² = 0.07; P = 0.84). Todas las especies disminuyen su abundancia durante el período más seco del año y el inicio de las lluvias.

          Translated abstract

          Dung beetles (Scarabaeinae y Aphodiinae) were used to evaluate the effects of human activities in the area surrounding La Planada Natural Reserve, southwestern Colombia. During 1993 we monitored three habitats: primary and secondary forest, and open fields used for cattle grazing. A total of 55 296 trap / hours, evenly distributed among the three habitat types, captured 9 115 individuals (18 species, 11 genera). There were differences in species richness between habitats (F 2,9 = 29.88; P < 0.001), an in number of individuals (F 2, 9 = 36.22; P < 0.001). Collecting sites differed within habitats. Cluster analyses show that species composition differs between habitats with and without tree cover. Open areas act as barriers for movements of forest species. Differences between habitats and collecting sites may reflect high environmental heterogeneity, land use history of the sites or the influence of nearby disturbance. Some of the species found in open fields come from lower elevations and are usually associated with intense human disturbance. The proportion of digging and rolling species is similar in both primary and secondary forest, nocturnal species are more abundant; in open areas rolling species are absent and the number of diurnal species increases. We found no relationship between rainfall and species richness (r² = 0.26; P = 0.41), nor between rainfall and number of individuals collected throughout the year (r² = 0.07; P = 0.84). For all species the number of individuals collected decreased during dry season and during the onset of the rainy season.

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          Disturbance, Diversity, and Invasion: Implications for Conservation

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            Seasonal Change in Abundance of Large Nocturnal Dung Beetles (Scarabaeidae) in a Costa Rican Deciduous Forest and Adjacent Horse Pasture

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              A comparative study of the structure of the scarab guild in Mexican tropical rain forests and derived ecosystems

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                rbt
                Revista de Biología Tropical
                Rev. biol. trop
                Universidad de Costa Rica (San José )
                0034-7744
                December 2000
                : 48
                : 4
                : 961-975
                Affiliations
                [1 ] Instituto de Investigación en Recursos Biológicos Alexander von Humboldt Colombia
                [2 ] Universidad Del Valle Colombia
                Article
                S0034-77442000000400020
                11487941
                a42b947a-a7ed-456f-8d28-72666a37f14f

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

                History
                Product

                SciELO Costa Rica

                Self URI (journal page): http://www.scielo.sa.cr/scielo.php?script=sci_serial&pid=0034-7744&lng=en
                Categories
                Biodiversity Conservation
                Biology

                General life sciences,Animal science & Zoology
                Scarabaeinae,Aphodiinae,succession gradient,spatial heterogeneity,diversity and conservation,Colombian Andes,gradiente de sucesión,heterogeneidad espacial,diversidad,conservación,Andes colombianos

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