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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

The structure and seasonal changes of earthworm communities were evaluated in a natural savanna and in a improved grass-legume pasture in a Colombian oxisol over a period of 18 months. One plot of 90×90 m was isolated in each of the systems and each month five samples of 1 m2×0.5 m and ten of 20×...


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

This study was carried out in the Eastern Plains of Colombia and assessed the impact of agricultural intensification on the structure of earthworm communities. Earthworms were hand-sorted in a variety of agroecosystems of increasing intensity, from natural savanna to pastures and annual crops. An...


Decaëns, ThibaudJiménez Jaén, J.J.[Earthworm communities under an agricultural intensification gradient in Colombia]Earthworm communities under an agricultural intensification gradient in Colombia
Jiménez, J.J.Thomas, R.Fisher, M.Asakawa, N.Decaëns, ThibaudLavelle, Patrick M.Mariani, L[Impacto de los organismos del suelo en la diversidad vegetal y la abundancia: estudio de caso de una especie nativa de lombriz de tierra anécica]Impacto de los organismos del suelo en la diversidad vegetal y la abundancia: estudio de caso de una especie nativa de lombriz de tierra anécica
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

Martiodrilus carimaguensis (Oligochaeta, Glossoscolecidae) is a large, anecic native earthworm species which was found in natural and disturbed savannas in the Oxisols of the Colombian Llanos. The population dynamics of this species were studied in a native savanna, and in a 17-year-old grazed gr...


Jiménez Jaén, J.J.Moreno, AlonsoLavelle, Patrick M.Decaëns, Thibaud[Population dynamics and adaptive strategies of Martiodrilus carimaguensis (oligochaeta, glossoscolecidae), a native species from the well-drained savannas of Colombia]Population dynamics and adaptive strategies of Martiodrilus carimaguensis (oligochaeta, glossoscolecidae), a native species from the well-drained savannas of Colombia

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