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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
24/08/2012 |
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Data da última atualização: |
20/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MARICHAL, R.; GRIMALDI, M.; MATHIEU, J.; BROWN, G. G.; SILVA JUNIOR, M. L. da; PRAXEDES, C.; MARTINS, M. B.; VELASQUEZ, E.; LAVELLE, P. |
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Afiliação: |
RAPHAEL MARICHAL, Museu Paraense Emilio Goeldi; MICHEL GRIMALDI, RD, UMR Bioemco; JEROME MATHIEU, UPMC Université Paris; GEORGE GARDNER BROWN, CNPF; MARIO LOPES DA SILVA JUNIOR, UFRA; CATARINA PRAXEDES, Museu Paraense Emilio Goeldi; MARLUCIA B. MARTINS, Museu Paraense Emilio Goeldi; ELENA VELASQUEZ, Universidad Nacional de Colombia; PATRICK LAVELLE, Centro Internacional de Agricultura Tropical (CIAT). |
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Título: |
Is invasion of deforested Amazonia by the earthworm Pontoscolex corethrurus driven by soil texture and chemical properties? |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Pedobiologia, v. 55, p. 233-240, 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
Pontoscolex corethurus (Müller, 1857) is the most common invasive earthworm in disturbed lands in the tropics. Conditions required for its successful colonization of new plots are still not understood since some areas can be invaded while others, sometimes in the vicinity, are not. We kept newly hatched P. corethrurus in a wide range of Amazonian soils where population densities had been previously evaluated. We identified soil conditions that best sustain survival, soil ingestion and growth of P. corethrurus in controlled laboratory conditions and checked if presence/absence in the field was consistent with laboratory observations. While pH and Ca influenced survival; Mg and C content were the greatest determinants for growth and C:P, Mg and clay contents determined soil ingestion rates. Soil ingestion and growth rate were correlated. There were no differences in earthworm soil ingestion rates between invaded and non-invaded soils. However, growth rate and survival were higher in soils from invaded sites than in soils from non invaded sites, indicating that soil quality may play a role in the invasion process. We identified two cases where P. corethrurus did not occur: (1) unfavourable soil texture and chemical properties, but also some areas with and (2) favourable soil texture and chemical properties but no invasion. Other parameters, like vegetation cover (grass or trees), soil structure and compaction, soil hydrologic processes or biotic resistance of native earthworm communities could potentially also be key elements for understanding why P. corethrurus populations occur in some sites and not in others. MenosPontoscolex corethurus (Müller, 1857) is the most common invasive earthworm in disturbed lands in the tropics. Conditions required for its successful colonization of new plots are still not understood since some areas can be invaded while others, sometimes in the vicinity, are not. We kept newly hatched P. corethrurus in a wide range of Amazonian soils where population densities had been previously evaluated. We identified soil conditions that best sustain survival, soil ingestion and growth of P. corethrurus in controlled laboratory conditions and checked if presence/absence in the field was consistent with laboratory observations. While pH and Ca influenced survival; Mg and C content were the greatest determinants for growth and C:P, Mg and clay contents determined soil ingestion rates. Soil ingestion and growth rate were correlated. There were no differences in earthworm soil ingestion rates between invaded and non-invaded soils. However, growth rate and survival were higher in soils from invaded sites than in soils from non invaded sites, indicating that soil quality may play a role in the invasion process. We identified two cases where P. corethrurus did not occur: (1) unfavourable soil texture and chemical properties, but also some areas with and (2) favourable soil texture and chemical properties but no invasion. Other parameters, like vegetation cover (grass or trees), soil structure and compaction, soil hydrologic processes or biotic resistance of native earthworm c... Mostrar Tudo |
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Thesagro: |
Minhoca. |
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Thesaurus Nal: |
Amazonia; Pontoscolex corethrurus. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02376naa a2200253 a 4500
001 1932145
005 2015-02-20
008 2012 bl uuuu u00u1 u #d
100 1 $aMARICHAL, R.
245 $aIs invasion of deforested Amazonia by the earthworm Pontoscolex corethrurus driven by soil texture and chemical properties?$h[electronic resource]
260 $c2012
520 $aPontoscolex corethurus (Müller, 1857) is the most common invasive earthworm in disturbed lands in the tropics. Conditions required for its successful colonization of new plots are still not understood since some areas can be invaded while others, sometimes in the vicinity, are not. We kept newly hatched P. corethrurus in a wide range of Amazonian soils where population densities had been previously evaluated. We identified soil conditions that best sustain survival, soil ingestion and growth of P. corethrurus in controlled laboratory conditions and checked if presence/absence in the field was consistent with laboratory observations. While pH and Ca influenced survival; Mg and C content were the greatest determinants for growth and C:P, Mg and clay contents determined soil ingestion rates. Soil ingestion and growth rate were correlated. There were no differences in earthworm soil ingestion rates between invaded and non-invaded soils. However, growth rate and survival were higher in soils from invaded sites than in soils from non invaded sites, indicating that soil quality may play a role in the invasion process. We identified two cases where P. corethrurus did not occur: (1) unfavourable soil texture and chemical properties, but also some areas with and (2) favourable soil texture and chemical properties but no invasion. Other parameters, like vegetation cover (grass or trees), soil structure and compaction, soil hydrologic processes or biotic resistance of native earthworm communities could potentially also be key elements for understanding why P. corethrurus populations occur in some sites and not in others.
650 $aAmazonia
650 $aPontoscolex corethrurus
650 $aMinhoca
700 1 $aGRIMALDI, M.
700 1 $aMATHIEU, J.
700 1 $aBROWN, G. G.
700 1 $aSILVA JUNIOR, M. L. da
700 1 $aPRAXEDES, C.
700 1 $aMARTINS, M. B.
700 1 $aVELASQUEZ, E.
700 1 $aLAVELLE, P.
773 $tPedobiologia$gv. 55, p. 233-240, 2012.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
27/11/1998 |
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Data da última atualização: |
11/09/2013 |
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Autoria: |
KALIL FILHO, A. N.; LUZ, A. I. R.; SÁ SOBRINHO, A. F. de; WOLTER, E. L. A.; PEREIRA JÚNIOR, O. L. |
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Afiliação: |
Embrapa Amazônia Ocidental; INPA. |
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Título: |
Conservação de germoplasma de sacaca (Croton cajucara Benth.), uma nova fonte de linalol para a Amazônia Ocidental. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Manaus: EMBRAPA-CPAA, 1998. |
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Páginas: |
3 p. |
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Série: |
(EMBRAPA-CPAA. Pesquisa em Andamento, 39). |
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ISSN: |
1414-9079 |
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Idioma: |
Português |
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Conteúdo: |
Visando o melhoramento genetico da sacaca, foi instalado um Banco Ativo de Germoplasma (BAG) na Embrapa Amazonia Ocidental. Estao sendo feitas coletas e multiplicacao vegetativa de acesso de sacaca de diversos locais da Amazonia. O BAG-Sacaca visa nao somente a conservacao do germoplasma, mas o estudo da variabilidade genetica entre acesso, para selecao de genotipos superiores para producao de biomassa (folhas), e com maior potencial de producao de oleos essenciais. Ate o presente, foram coletados 15 acessos. Dentro de procedencias foram detectados dois ecotipos: sacaca branca e roxa ou vermelha. Esta com folhas maiores e de cor verde-escura, parecendo possuir maior teor de oleo. Entretanto, analise preliminar de oleo, sujeito a confirmacao, evidencia a existencia no cromatograma de varios picos, ou seja, composto com diferentes pesos moleculares. |
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Palavras-Chave: |
Amazonas; Brasil; Germplasm bank; Oil; Sacaca. |
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Thesagro: |
Banco de Germoplasma; Óleo. |
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Thesaurus NAL: |
Croton cajucara. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/76939/1/CPAA-PESQ.-AND.-39-98.pdf
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Marc: |
LEADER 01671nam a2200289 a 4500
001 1667997
005 2013-09-11
008 1998 bl uuuu u0uu1 u #d
022 $a1414-9079
100 1 $aKALIL FILHO, A. N.
245 $aConservação de germoplasma de sacaca (Croton cajucara Benth.), uma nova fonte de linalol para a Amazônia Ocidental.
260 $aManaus: EMBRAPA-CPAA$c1998
300 $a3 p.
490 $a(EMBRAPA-CPAA. Pesquisa em Andamento, 39).
520 $aVisando o melhoramento genetico da sacaca, foi instalado um Banco Ativo de Germoplasma (BAG) na Embrapa Amazonia Ocidental. Estao sendo feitas coletas e multiplicacao vegetativa de acesso de sacaca de diversos locais da Amazonia. O BAG-Sacaca visa nao somente a conservacao do germoplasma, mas o estudo da variabilidade genetica entre acesso, para selecao de genotipos superiores para producao de biomassa (folhas), e com maior potencial de producao de oleos essenciais. Ate o presente, foram coletados 15 acessos. Dentro de procedencias foram detectados dois ecotipos: sacaca branca e roxa ou vermelha. Esta com folhas maiores e de cor verde-escura, parecendo possuir maior teor de oleo. Entretanto, analise preliminar de oleo, sujeito a confirmacao, evidencia a existencia no cromatograma de varios picos, ou seja, composto com diferentes pesos moleculares.
650 $aCroton cajucara
650 $aBanco de Germoplasma
650 $aÓleo
653 $aAmazonas
653 $aBrasil
653 $aGermplasm bank
653 $aOil
653 $aSacaca
700 1 $aLUZ, A. I. R.
700 1 $aSÁ SOBRINHO, A. F. de
700 1 $aWOLTER, E. L. A.
700 1 $aPEREIRA JÚNIOR, O. L.
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Embrapa Amazônia Ocidental (CPAA) |
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