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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
28/12/2010 |
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Data da última atualização: |
18/08/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MARICHAL, R.; MARTINEZ, A. F; PRAXEDES, C.; RUIZ, D.; CARVAJAL, A. F.; OSWALD, J.; HURTADO, M. Del P.; BROWN, G. G.; GRIMALDI, M.; DESJARDINS, T.; SARRAZIN, M.; DECAËNS, T.; VELASQUEZ, H.; LAVELLE, P. |
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Afiliação: |
RAPHAEL MARICHAL, Université Pierre et Marie Curie/IRD; ALEXANDER FEIJOO MARTINEZ, Universidad Tecnológica de Pereira, Colômbia; CATARINA PRAXEDES, Museu Paraense Emilio Goeldi; DARIO RUIZ, Université Pierre et Marie Curie/IRD; ANDRÉS F. CARVAJAL, Université Pier; JOHAN OSWALD, Université de Rennes, France; MARIA DEL PILAR HURTADO, CIAT, Colombia; GEORGE GARDNER BROWN, CNPF; MICHEL GRIMALDI, Centre IRD Ile, France; THIERRY DESJARDINS, Centre IRD Ile, France; MAX SARRAZIN, Centre IRD Ile, France; THIBAUD DECAËNS, Université de Rouen, France; HELENA VELASQUEZ, Universidade de Colombia; PATRICK LAVELLE, Centre IRD Ile, France. |
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Título: |
Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Applied Soil Ecology, v. 46, p. 443-449, 2010. |
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Idioma: |
Inglês |
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Conteúdo: |
Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) is an invasive endogeic earthworm that has colonized most land transformed by human activities in the humid tropics. When installed, populations can change soil physical properties, biogeochemical processes and microbial communities. The aim of this study was to determine whether P. corethrurus establishment is a result of (1) a competitive exclusion of native earthworm species or (2) the exploitation of a new niche created by anthropogenic disturbance that native earthworm species cannot use. We tested these hypotheses by doing a survey of earthworm communities in 270 sites that represented the diversity of land use systems encountered in two contrasted regions of the Amazonian arc of deforestation located in Brazil and Colombia respectively. When present in forests, P. corethrurus had no negative effect on the native species communities that had similar (epigeic species) or even higher densities (endogeic species) in the presence of the invasive species. These results suggest the absence of competitive exclusion. The first two axes of a PCA multivariate analysis of communities represented the densities of native species (axis 1) and P. corethrurus (axis 2) respectively. This suggests that respective densities of the two groups respond to different conditions and that their variations are independent. The density of P. corethrurus co-varied with soil N content and pH in Colombian sites while the densities of other species did not. Our results thus suggest that this invasive species, unlike native species, is able to feed and develop in environments where litter resources are decreased while soils have been enriched in C and nutrients by deforestation and burning. We discuss the reasons why some primary forests in Central America have large populations of P. corethrurus. MenosPontoscolex corethrurus (Glossoscolecidae, Oligochaeta) is an invasive endogeic earthworm that has colonized most land transformed by human activities in the humid tropics. When installed, populations can change soil physical properties, biogeochemical processes and microbial communities. The aim of this study was to determine whether P. corethrurus establishment is a result of (1) a competitive exclusion of native earthworm species or (2) the exploitation of a new niche created by anthropogenic disturbance that native earthworm species cannot use. We tested these hypotheses by doing a survey of earthworm communities in 270 sites that represented the diversity of land use systems encountered in two contrasted regions of the Amazonian arc of deforestation located in Brazil and Colombia respectively. When present in forests, P. corethrurus had no negative effect on the native species communities that had similar (epigeic species) or even higher densities (endogeic species) in the presence of the invasive species. These results suggest the absence of competitive exclusion. The first two axes of a PCA multivariate analysis of communities represented the densities of native species (axis 1) and P. corethrurus (axis 2) respectively. This suggests that respective densities of the two groups respond to different conditions and that their variations are independent. The density of P. corethrurus co-varied with soil N content and pH in Colombian sites while the densities of other spec... Mostrar Tudo |
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Thesagro: |
Minhoca. |
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Categoria do assunto: |
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Marc: |
LEADER 02674naa a2200289 a 4500
001 1871063
005 2015-08-18
008 2010 bl uuuu u00u1 u #d
100 1 $aMARICHAL, R.
245 $aInvasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc.$h[electronic resource]
260 $c2010
520 $aPontoscolex corethrurus (Glossoscolecidae, Oligochaeta) is an invasive endogeic earthworm that has colonized most land transformed by human activities in the humid tropics. When installed, populations can change soil physical properties, biogeochemical processes and microbial communities. The aim of this study was to determine whether P. corethrurus establishment is a result of (1) a competitive exclusion of native earthworm species or (2) the exploitation of a new niche created by anthropogenic disturbance that native earthworm species cannot use. We tested these hypotheses by doing a survey of earthworm communities in 270 sites that represented the diversity of land use systems encountered in two contrasted regions of the Amazonian arc of deforestation located in Brazil and Colombia respectively. When present in forests, P. corethrurus had no negative effect on the native species communities that had similar (epigeic species) or even higher densities (endogeic species) in the presence of the invasive species. These results suggest the absence of competitive exclusion. The first two axes of a PCA multivariate analysis of communities represented the densities of native species (axis 1) and P. corethrurus (axis 2) respectively. This suggests that respective densities of the two groups respond to different conditions and that their variations are independent. The density of P. corethrurus co-varied with soil N content and pH in Colombian sites while the densities of other species did not. Our results thus suggest that this invasive species, unlike native species, is able to feed and develop in environments where litter resources are decreased while soils have been enriched in C and nutrients by deforestation and burning. We discuss the reasons why some primary forests in Central America have large populations of P. corethrurus.
650 $aMinhoca
700 1 $aMARTINEZ, A. F
700 1 $aPRAXEDES, C.
700 1 $aRUIZ, D.
700 1 $aCARVAJAL, A. F.
700 1 $aOSWALD, J.
700 1 $aHURTADO, M. Del P.
700 1 $aBROWN, G. G.
700 1 $aGRIMALDI, M.
700 1 $aDESJARDINS, T.
700 1 $aSARRAZIN, M.
700 1 $aDECAËNS, T.
700 1 $aVELASQUEZ, H.
700 1 $aLAVELLE, P.
773 $tApplied Soil Ecology$gv. 46, p. 443-449, 2010.
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Embrapa Florestas (CNPF) |
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Biblioteca(s): |
Embrapa Agropecuária Oeste. |
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Data corrente: |
06/07/2001 |
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Data da última atualização: |
05/02/2013 |
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Tipo da produção científica: |
Documentos |
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Autoria: |
EMBRAPA AGROPECUÁRIA OESTE. |
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Título: |
Resultados de pesquisa com espécies de inverno: trigo - 1998. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Dourados, 2000. |
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Páginas: |
36 p. |
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Série: |
(Embrapa Agropecuária Oeste. Documentos, 21). |
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Idioma: |
Português |
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Conteúdo: |
Avaliação de cultivares de trigo em nível estadual de experimentação, no Sul de Mato Grosso do Sul, Avaliação de cultivares e linhagens de trigo em nível final de experimentação, no Sul de Mato Grosso do Sul, Safra 1998, Avaliação de cultivares e linhagens de trigo em nível final de experimentação, no Sul de Mato Grosso do Sul, Safra 1998, Avaliação de linhagens de trigo em nível intermediário de experimentação, no Sul do Mato Grosso do Sul, Safra 1998, Avaliação de linhagens de trigo em nível preliminar de experimentação, no Sul de Mato Grosso do Sul. |
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Palavras-Chave: |
Advance; Behaviour; Brasil; Comportamento; Dourados; Genetic gain; Mato Grasso do Sul; Mato Grosso do Sul; Melhoramento genético; Plant production; Research Plant breeding; Species; Wheats; Winter crops. |
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Thesagro: |
Cerrado; Clima; Cultura de Inverno; Espécie; Linhagem; Melhoramento; Melhoramento Vegetal; Pesquisa; Produção Vegetal; Trigo; Triticum Aestivum; Triticum Diccocum; Variedade. |
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Thesaurus NAL: |
Brazil; breeding; climate; progeny; research; varieties; wheat. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/65633/1/DOC21-00-Res-Trigo.pdf
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Marc: |
LEADER 01920nam a2200541 a 4500
001 1243578
005 2013-02-05
008 2000 bl uuuu u0uu1 u #d
100 1 $aEMBRAPA AGROPECUÁRIA OESTE.
245 $aResultados de pesquisa com espécies de inverno$btrigo - 1998.
260 $aDourados$c2000
300 $a36 p.
490 $a(Embrapa Agropecuária Oeste. Documentos, 21).
520 $aAvaliação de cultivares de trigo em nível estadual de experimentação, no Sul de Mato Grosso do Sul, Avaliação de cultivares e linhagens de trigo em nível final de experimentação, no Sul de Mato Grosso do Sul, Safra 1998, Avaliação de cultivares e linhagens de trigo em nível final de experimentação, no Sul de Mato Grosso do Sul, Safra 1998, Avaliação de linhagens de trigo em nível intermediário de experimentação, no Sul do Mato Grosso do Sul, Safra 1998, Avaliação de linhagens de trigo em nível preliminar de experimentação, no Sul de Mato Grosso do Sul.
650 $aBrazil
650 $abreeding
650 $aclimate
650 $aprogeny
650 $aresearch
650 $avarieties
650 $awheat
650 $aCerrado
650 $aClima
650 $aCultura de Inverno
650 $aEspécie
650 $aLinhagem
650 $aMelhoramento
650 $aMelhoramento Vegetal
650 $aPesquisa
650 $aProdução Vegetal
650 $aTrigo
650 $aTriticum Aestivum
650 $aTriticum Diccocum
650 $aVariedade
653 $aAdvance
653 $aBehaviour
653 $aBrasil
653 $aComportamento
653 $aDourados
653 $aGenetic gain
653 $aMato Grasso do Sul
653 $aMato Grosso do Sul
653 $aMelhoramento genético
653 $aPlant production
653 $aResearch Plant breeding
653 $aSpecies
653 $aWheats
653 $aWinter crops
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