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The effects of a large species of anecic earthworm, Martiodrilus carimaguensis Jiménez and Moreno, on soil C and N dynamics were investigated in a native savanna and a man-made pasture of the eastern plains of Colombia. We compared, across time (11 months), the total C, total N, NH+ 4 and NO– 3 c...


Decaëns, ThibaudRangel Becerra, AFAsakawa, N.Thomas, Richard J.[Carbon and nitrogen dynamics in ageing earthworm casts in grasslands of the eastern plains of Colombia]Carbon and nitrogen dynamics in ageing earthworm casts in grasslands of the eastern plains of Colombia
Decaëns, ThibaudRangel Becerra, AFThomas, Richard J.Asakawa, N.Thomas, Richard J.[Dinámica del carbono y del nitrógeno en las heces de diferente edad depositadas por lombrices en áreas de sabana y de pastizal en los Llanos Orientales de Colombia]Dinámica del carbono y del nitrógeno en las heces de diferente edad depositadas por lombrices en áreas de sabana y de pastizal en los Llanos Orientales de Colombia

The effects of Martiodrilus carimaguensis (Oligochaeta, Glossoscolecidae) on soil seed banks was investigated in a Colombian savanna and two introduced pastures. Germination and washing-sieving methods were used to compare seed density, diversity, and germination rates in earthworm casts and the ...


Decaëns, ThibaudMariani, LBetancourt, NJiménez Jaén, J.J.[Earthworm effects on permanent soil seed banks in Colombian grasslands]Earthworm effects on permanent soil seed banks in Colombian grasslands

An ecological classification based on a set of morphological characters may be used to describe earthworm functions in soil. However these relationships have been seldom verified. Gizzards of the earthworm Martiodrilus carimaguensis (Glossoscolecidae) were studied to find out if its anecic morpho...


Mariani, LBernier, NJiménez Jaén, J.J.Decaëns, Thibaud[Diet of an anecic earthworms from the Colombian savannas: a question about ecological categories]Diet of an anecic earthworms from the Colombian savannas: a question about ecological categories
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

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

Fourteen types of physical structures produced on the soil surface by ecological engineers were sampled in the Eastern Plains of Colombia. The invertebrates creating these structures were identified. Some physical (aggregate size and stability, and bulk density) and chemical (C, N, and P contents...


Decaëns, ThibaudGalvis, JHAmézquita Collazos, Edgar[Properties of the structures created by ecosystem engineers on the soil surface of a Colombian savanna]Properties of the structures created by ecosystem engineers on the soil surface of a Colombian savanna

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