Melolonthidae coleoptera: scarabaeoidea assembly associated to pastures in caqueta colombia and its possible relationship with soil health Report as inadecuate




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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 nuevos registros para el departamento de Caquetá y dos nuevos registros para el país. Se recolectaron 475 ejemplares de larvas y 11 morfoespecies especies, cuya distribución y abundancia variaron significativamente segün usos del suelo, épocas y localidades. Resalta la poca diversidad beta de la región 11 especies y alfa por municipios cinco especies, de las cuales solo 33% fueron saprófagas Cyclocephala, Euetheola, mientras que el resto Phyllophaga, Plectris, Barybas, Bolax son rizófagas, lo que significa un balance expresivo del deterioro edãfico, presumiblemente causado por la declinación de la materia orgãnica y afectación de las condiciones físicas del suelo como consecuencia de la ganadería extensiva. Se sugiere realizar estudios a mayor escala geogrãfica y reenfocar el uso del suelo hacia sistemas multiestratificados.

Tipo de documento: Artículo - Article

Palabras clave: Escarabajo, Scarabaeidae, Coleoptera, Cyclocephala, Euetheola, Phyllophaga, Plectris, Barybas, Bolax, Caquetá, Colombia., Beetles, Scarabaeidae, Coleoptera, Cyclocephala, Euetheola, Phyllophaga, Plectris, Barybas, Bolax, Caquetá, Colombia.





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Research article Melolonthidae (Coleoptera: Scarabaeoidea) assembly associated to pastures in Caqueta (Colombia) and its possible relationship with soil health Ensamblaje de escarabajos Melolonthidae (Coleoptera: Scarabaeoidea) asociados con pasturas en el departamento del Caquetá y su posible relación con la salubridad edáfica Luis Carlos Pardo-Locarno1*, Bertha Ramírez-Pava2, Harold Villota3, Oscar Villanueva2, and Wilmar Bahamón3 Environmental Consultant, Fondation Center for Research on Sustainable Systems for Agricultural Production (CIPAV), Cali, Valle del Cauca, Colombia.2Professors Universidad del Amazonas, 3Project Research Assitants. *Corresponding author: pardolc@gmail.com 1 Rec.: 06.05.11 Acept.: 01.12.11 Abstract The Caquetá hillside zone 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 Caguán, 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 documented, a moderate diversity assemblage including 16 and 2 new records for the Department of Caquetá and Colombia, respectively.
475 larvae and 11 morphospecies were collected, their distribution and abundance varied significantly depending on management, seasons and localities, highlighting the low beta diversity of the region (11 species) and the low alpha diversity by municipalities (five species), including just 33% saprophagous (Cyclocephala, Euetheola), while the other ones (Ph...






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