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
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, Alonso
,
Lavelle, Patrick M.
,
[Reproductive strategies of three native earthworm species from the savannas of Carimagua (Colombia)]
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Reproductive strategies of three native earthworm species from the savannas of Carimagua (Colombia)
Jiménez Jaén, J.J.
,
Decaëns, Thibaud
,
Thomas, Richard J.
,
Mariani, L
,
[General conclusions, research highlights, and future needs]
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General conclusions, research highlights, and future needs