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From April to September 1994, macrofauna density, total biomass, and species diversity of earthworms were measured across a range of land use types in the Cabuyal River watershed. The methodology recommended by the Tropical Soil Biology and Fertility (TSBF) Program was used. Macrofauna density, b...


Feijoo Martínez, AlexanderKnapp, EBLavelle, Patrick M.Moreno, Alonso[Quantifying soil macrofauna in a Colombian watershed]Quantifying soil macrofauna in a Colombian watershed
Jiménez Jaén, J.J.Decaëns, ThibaudThomas, Richard J.Lavelle, Patrick M.[Soil macrofauna: an available but little-known natural resources]Soil macrofauna: an available but little-known natural resources

The effects of different types of land management on the soil macroinvertebrate communities on acid soil savannas of Colombia have been assessed using the Tropical Soil Biology and Fertility Program (TSBF) methodology. Invertebrates were identified among broad taxonomic units, TU (Orders or Famil...


Decaëns, ThibaudLavelle, Patrick M.Jiménez Jaén, J.J.Escobar, G.Rippstein, GSchneidmadl, JSanz Scovino, José IgnacioHoyos, P.Thomas, Richard J.[Impact of land management on soil macrofauna in the Eastern plains of Colombia]Impact of land management on soil macrofauna in the Eastern plains of Colombia

This was especially due to the presence of a large glossoscolecid anecic species, Martiodrilus carimaguensis Jim\233nez and Moreno, which has been greatly favored by conversion of savanna to pasture. Endogeic species were dominant in the natural savanna whereas the anecic species accounted for th...


Jiménez Jaén, J.J.Moreno, AlonsoDecaëns, ThibaudLavelle, Patrick M.Fisher, Myles J.Thomas, Richard J.[Earthworms communities in native savannas and man-made pastures of the Eastern plains of Colombia]Earthworms communities in native savannas and man-made pastures of the Eastern plains of Colombia

A detailed description and drawings of the aestivation chambers of five earthworm species are given plus a complete analysis of the mechanistic processes that determine this behavioral pattern for one anecic species from Colombia. The onset of aestivation differed in adults and juveniles for two ...


Jiménez Jaén, J.J.Brown, George G.Decaëns, ThibaudFeijoo Martínez, AlexanderLavelle, Patrick M.[Differences in the timing of diapause and patterns of aestivation in tropical earthworms]Differences in the timing of diapause and patterns of aestivation in tropical earthworms

Data on the reproductive biology of three native glossoscolecid species from the Colombian Llanos are presented here. The seasonal dynamics of reproduction varied among the species considered which displayed either one or two reproductive periods per year. Cocoons were laid at different depths to...


Jiménez Jaén, J.J.Moreno, AlonsoLavelle, Patrick M.[Reproductive strategies of three native earthworm species from the savannas of Carimagua (Colombia)]Reproductive strategies of three native earthworm species from the savannas of Carimagua (Colombia)

The effect of different types of land management on the soil macrofauna of the savanna has been assesed using the T.S.B.F. method. Macrofauna of the forest and savanna has a high density (4293 and 2830 ind.m(2)) and moderate biomass (13.6 and 15.3 g.m(-2)). Traditional grazing significantly incre...


Decaëns, ThibaudLavelle, Patrick M.Jiménez Jaén, J.J.Escobar, G.Rippstein, G[Impact of land management on soil macrofauna in the Oriental Llanos of Colombia]Impact of land management on soil macrofauna in the Oriental Llanos of Colombia
Jiménez Jaén, J.J.Rossi, JPLavelle, Patrick M.[Spatial distribution of earthworms in acid-soil savannas of the Eastern plains of Colombia]Spatial distribution of earthworms in acid-soil savannas of the Eastern plains of Colombia

Tropical savannas constitute one of the most predominant ecosystems in South America with an overall extension of almost 250 millions ha. The role that these grasslands play over the environment is a key factor to understand its functioning and the response to changes induced by humankind. Moreov...


Jiménez Jaén, J.J.Moreno, AlonsoDecaëns, ThibaudRossi, JPLavelle, Patrick M.[The earthworms community of Carimagua (Eastern plains, Colombia) : taxonomy and ecology of species. Looking forward to a sustainable way of land management?]The earthworms community of Carimagua (Eastern plains, Colombia) : taxonomy and ecology of species. Looking forward to a sustainable way of land management?
Decaëns, ThibaudMariani, LLavelle, Patrick M.[Las comunidades de la macrofauna de la superficie del suelo asociadas con las heces de las lombrices de tierra en los Llanos Orientales de Colombia]Las comunidades de la macrofauna de la superficie del suelo asociadas con las heces de las lombrices de tierra en los Llanos Orientales de Colombia

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