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The vertical distribution of native earthworm species from natural and disturbed savannas in the Oxisols of the Colombian Llanos was assessed in a native savanna and in a 17-year-old grazed grass-legume pasture during a period of 17 months. Different patterns of vertical stratification were `Obse...


Jiménez Jaén, J.J.Decaëns, Thibaud[Vertical distribution of earthworms in grassland soils of the Colombian "Llanos"]Vertical distribution of earthworms in grassland soils of the Colombian "Llanos"

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)
Jiménez Jaén, J.J.Decaëns, ThibaudThomas, Richard J.Mariani, L[General conclusions, research highlights, and future needs]General conclusions, research highlights, and future needs

Earthworms are considered soil ecosystem engineers that play an important role in soil organic matter dynamics and physical structure. Due to both their size and activities these organisms can accelerate the decomposition and mineralization of organic matter by reducing the size of residues to pa...


Jiménez Jaén, J.J.Cepeda, AFriesen, Dennis K.Decaëns, ThibaudOberson, Astrid[Phosphorus availability in casts of an anecic savanna earthworms in Colombian oxisol]Phosphorus availability in casts of an anecic savanna earthworms in Colombian oxisol
Jiménez Jaén, J.J.Barrios, E.Ayarza, Miguel AngelLavelle, Patrick M.Decaëns, Thibaud[Harnessing the biological plows of the soil: soil macrofauna communities]Harnessing the biological plows of the soil: soil macrofauna communities

The vertical distribution of native earthworm species from natural and disturbed savannas in the Oxisols of the Colombian Llanos was assessed in a native savanna and in a 17-year-old grazed grass-legume pasture during a period of 17?months. Different patterns of vertical stratification were obser...


Jiménez Jaén, J.J.Decaëns, Thibaud[Vertical distribution of earthworms in grassland soils of the Colombian Llanos]Vertical distribution of earthworms in grassland soils of the Colombian Llanos

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.[Estructura de las comunidades y dinámica de las poblaciones de lombrices de tierra en las sabanas naturales y perturbadas de Carimagua (Colombia). Tesis (Dr. Biología)]Estructura de las comunidades y dinámica de las poblaciones de lombrices de tierra en las sabanas naturales y perturbadas de Carimagua (Colombia). Tesis (Dr. Biología)
Jiménez Jaén, J.J.Thomas, Richard J.[Nature's plow: soil macroinvertebrate communities in the neotropical savannas of Colombia]Nature's plow: soil macroinvertebrate communities in the neotropical savannas of Colombia

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