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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

In this study, we investigated the spatial distribution of an earthworm community together with the heterogeneity of selected soil properties in a gallery forest (GF) of the Colombian Llanos . We performed fine-scale spatial variability by intensively sampling 100 points distributed in the nodes...


Jiménez, J.J.Decaëns, ThibaudAmézquita Collazos, EdgarRao, Idupulapati M.Thomas, Richard J.Lavelle, Patrick M.[Short range spatial variability of soil physico-chemical variables related to earthworm clustering in a Neotropical gallery forest]Short range spatial variability of soil physico-chemical variables related to earthworm clustering in a Neotropical gallery forest
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

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"

Only a small part of the spatio-temporal structures of earthworm distribution was correlated with soil properties. Small species were more abundant in patches were soil was more compact, while large species were associated with high root biomass and total C levels. The question whether earthworm ...


Decaëns, ThibaudRossi, JP[Spatio-temporal structure of an earthworm community and soil heterogeneity in a tropical pasture (Carimagua, Colombia)]Spatio-temporal structure of an earthworm community and soil heterogeneity in a tropical pasture (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 generally considered to fulfill the definition of ecosystem engineers. The casts they produce are recognised to have a great importance in the regulation of soil processes. Lifetimes and degradation rates of these structures remain poorly known. In this study, the dynamics of disap...


Decaëns, Thibaud[Degradation dynamics of surface earthworms casts in grasslands of the Eastern plains of Colombia]Degradation dynamics of surface earthworms casts in grasslands of the Eastern plains of Colombia

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

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