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Boletín Científico. Centro de Museos. Museo de Historia Natural

Print version ISSN 0123-3068

Abstract

GUZMAN, Claudia L; MELO C, Ómar A; LOZANO, María Denis  and  RIVERA P, Fredy A. COLLEMBOLA (HEXAPODA) IN A THREE ESTABLISHMENT AGES SILVOPASTORAL SYSTEM AND IN A RICE-GROWING AREA OF THE TROPICAL DRY FOREST IN THE MUNICIPALITY OF PIEDRAS, TOLIMA. Bol. Cient. Mus. Hist. Nat. Univ. Caldas [online]. 2010, vol.14, n.2, pp.155-168. ISSN 0123-3068.

This study was carried out with the aim of contributing to the knowledge of collembola, in the tropical dry forest (bs-T). The area of study corresponded to a silvopastoral system of three establishment ages and a rice-growing area located at Latitude 4º29'6'' N and 74º59'15'' W, El Chaco estate (Piedras- Tolima). Three 1 hectare lots were established for each study site; in each block a central 50x20 m lot was traced taking 320 samples (8 samples per system during 10 months) with a drill in Berlese-Tullgren funnels. The 11,448 captured collembola include 10 families, 16 genera and 17 morphospecies. The 8 years silvopastoral system was the one that showed greater abundance and density and the least number of organisms in the rice-growing area which is understandable because of the practices in the cultivation management. A group of twelve morphospecies common to all the systems was found as well as the morphospecies Xenilla sp., Cyphoderus sp., Isotoma sp. and Mesaphorura sp., associated to the silvopastoral system and Lepidocyrtus sp., exclusive for the cultivation. A high dominance was present, favored by a high number of isotomidae organisms. The abundance of genera showed significant differences between the systems and the collection months. The correspondence analysis and the hierarchical classification showed a separation of populations, systems with greater vegetal coverage (silvopastoral 3 and 8 years), greater faunistic similarity, and the most degraded communities and with less coverage (rice and silvopastoral 7 months) are close.

Keywords : soil; productivity site; collembola.

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