نبذة مختصرة : The Caquetá hillsidezone is a part of the Colombian Amazon region (mean pluvial precipitation 3600 mm; 260 m.a.s.l., 26ºC). It shows a mega diverse environment, ecologically fragile as the soils have been increasingly degraded. This research had the purpose of monitoring biological aspects of degraded soils resulting from extensive livestock production systems.A comparative sampling of richness and abundance variation of edaphic scarabs on cattle ranches of five municipalities (San Vicente del Caguãn, El Doncello, Belén de los Andaquíes, Albania y Valparaíso) was used. Adults were sampled using light traps and larvae by excavation of soil quadrants on pasture and forest relict plots during dry and rainy seasons. 26 Melolonthidae species were recorded, a moderate diversity assemblage including 16 and 2 new records for the Caquetá Department and Colombia, respectively. 475 larvae and 11 morphospecies were collected, their distribution and abundance varied significantly according to management, seasons and localities, highlighting the low beta diversity of the region (11 species) and the low alpha diversity by municipalities (five species), including /ust ; Universidad del AmazonasLa zona de piedemonte caqueteño (Colombia) forma parte de la región amazónica (3600 mm de precipitación anual, 260 m.s.n.m., 26 °C) y presenta un ambiente megadiverso y ecológicamente frágil cuyos suelos están siendo afectados de manera creciente por la ganadería de tipo extensivo. En el presente trabajo se hizo un monitoreo de la biología y abundancia de escarabajos edafícolas en fincas ganaderas con pasturas degradadas, localizadas en los municipios de San Vicente del Caguãn, El Doncello, Belén de los Andaquíes, Albania y Valparaíso, del departamento del Caquetá. Para el estudio se hicieron muestreos de adultos utilizando trampas de luz y de larvas en cuadrantes de suelo en parcelas de pasturas y relictos de selva durante épocas seca y húmeda. Se registraron 26 especies de Melolonthidae, ensamblaje de diversidad moderada, que incluye 16 ...
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