Earthworm communities under an agricultural intensification gradient in 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 ag...

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Detalles Bibliográficos
Autores: Decaëns, Thibaud, Jiménez, Juan J.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2002
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/102897
Acceso en línea:http://hdl.handle.net/10261/102897
Access Level:acceso abierto
Palabra clave:Agriculture intensification
Agriculture sustainability
intensification index
Crops
pastures
savanna
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spelling Earthworm communities under an agricultural intensification gradient in ColombiaDecaëns, ThibaudJiménez, Juan J.Agriculture intensificationAgriculture sustainabilityintensification indexCropspasturessavannaThis 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 agricultural intensification index was used to rank systems along an intensification gradient, i.e. from native savanna to pastures and annual crops. Earthworm biomass, specific richness and Shannon index sharply decreased along the gradient. The disappearance of some species in cultivated systems was mostly attributed to the lack of recovery of populations after major perturbations like e.g. tillage. The more resistant species were those presenting high surface mobility (i.e. high colonisation capacity) or high population growth potential (i.e. high ability of population recovering after perturbation). Sensitive species disappeared after pastures establishment but richness was recovered in a period of about 3 years. In 17 year-old pastures, community has regained its initial diversity and present very high biomass due to the presence of abundant populations of an anecic species. On the opposite, annual crops had deep detrimental impacts that were more accentuated in the rotations (i.e. systems that were tilled twice a year) and were still present in a 2 year-old fallow.We are grateful to R. Thomas, J.I. Sanz, M. Winograd and A. van Schoonhoven (CIAT) for useful comments on the manuscript, all the staff of the Carimagua research station and to the MAS-SWNM program.Peer reviewedKluwer Academic Publishers201420142002info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/102897reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1023/A:1015844610604Noinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1028972026-05-22T06:33:51Z
dc.title.none.fl_str_mv Earthworm communities under an agricultural intensification gradient in Colombia
title Earthworm communities under an agricultural intensification gradient in Colombia
spellingShingle Earthworm communities under an agricultural intensification gradient in Colombia
Decaëns, Thibaud
Agriculture intensification
Agriculture sustainability
intensification index
Crops
pastures
savanna
title_short Earthworm communities under an agricultural intensification gradient in Colombia
title_full Earthworm communities under an agricultural intensification gradient in Colombia
title_fullStr Earthworm communities under an agricultural intensification gradient in Colombia
title_full_unstemmed Earthworm communities under an agricultural intensification gradient in Colombia
title_sort Earthworm communities under an agricultural intensification gradient in Colombia
dc.creator.none.fl_str_mv Decaëns, Thibaud
Jiménez, Juan J.
author Decaëns, Thibaud
author_facet Decaëns, Thibaud
Jiménez, Juan J.
author_role author
author2 Jiménez, Juan J.
author2_role author
dc.subject.none.fl_str_mv Agriculture intensification
Agriculture sustainability
intensification index
Crops
pastures
savanna
topic Agriculture intensification
Agriculture sustainability
intensification index
Crops
pastures
savanna
description 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 agricultural intensification index was used to rank systems along an intensification gradient, i.e. from native savanna to pastures and annual crops. Earthworm biomass, specific richness and Shannon index sharply decreased along the gradient. The disappearance of some species in cultivated systems was mostly attributed to the lack of recovery of populations after major perturbations like e.g. tillage. The more resistant species were those presenting high surface mobility (i.e. high colonisation capacity) or high population growth potential (i.e. high ability of population recovering after perturbation). Sensitive species disappeared after pastures establishment but richness was recovered in a period of about 3 years. In 17 year-old pastures, community has regained its initial diversity and present very high biomass due to the presence of abundant populations of an anecic species. On the opposite, annual crops had deep detrimental impacts that were more accentuated in the rotations (i.e. systems that were tilled twice a year) and were still present in a 2 year-old fallow.
publishDate 2002
dc.date.none.fl_str_mv 2002
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/102897
url http://hdl.handle.net/10261/102897
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1023/A:1015844610604
No
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Kluwer Academic Publishers
publisher.none.fl_str_mv Kluwer Academic Publishers
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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