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 ...
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, L
,
Bernier, N
,
Jiménez Jaén, J.J.
,
Decaëns, Thibaud
,
[Diet of an anecic earthworms from the Colombian savannas: a question about ecological categories]
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Diet of an anecic earthworms from the Colombian savannas: a question about ecological categories
Jiménez Jaén, J.J.
,
Decaëns, Thibaud
,
Thomas, Richard J.
,
Lavelle, Patrick M.
,
[Soil macrofauna: an available but little-known natural resources]
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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, Thibaud
,
Lavelle, Patrick M.
,
Jiménez Jaén, J.J.
,
Escobar, G.
,
Rippstein, G
,
Schneidmadl, J
,
Sanz Scovino, José Ignacio
,
Hoyos, P.
,
Thomas, Richard J.
,
[Impact of land management on soil macrofauna in the Eastern plains of Colombia]
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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, Alonso
,
Lavelle, Patrick M.
,
Decaëns, Thibaud
,
[Population dynamics and adaptive strategies of Martiodrilus carimaguensis (oligochaeta, glossoscolecidae), a native species from the well-drained savannas of Colombia]
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Population dynamics and adaptive strategies of Martiodrilus carimaguensis (oligochaeta, glossoscolecidae), a native species from the well-drained savannas 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, Alonso
,
Decaëns, Thibaud
,
Lavelle, Patrick M.
,
Fisher, Myles J.
,
Thomas, Richard J.
,
[Earthworms communities in native savannas and man-made pastures of the Eastern plains of Colombia]
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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"]
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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, Thibaud
,
Feijoo Martínez, Alexander
,
Lavelle, Patrick M.
,
[Differences in the timing of diapause and patterns of aestivation in tropical earthworms]
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Differences in the timing of diapause and patterns of aestivation in tropical earthworms
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, A
,
Friesen, Dennis K.
,
Decaëns, Thibaud
,
Oberson, Astrid
,
[Phosphorus availability in casts of an anecic savanna earthworms in Colombian oxisol]
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Phosphorus availability in casts of an anecic savanna earthworms in Colombian oxisol
Decaëns, Thibaud
,
Jiménez Jaén, J.J.
,
Rangel, AF
,
Cepeda, A
,
Moreno, Alonso
,
Lavelle, Patrick M.
,
[La macrofauna del suelo en la sabana bien drenada de los Llanos Orientales]
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La macrofauna del suelo en la sabana bien drenada de los Llanos Orientales