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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
22/09/2008 |
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Data da última atualização: |
22/09/2008 |
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Autoria: |
HEDDE, M.; BUREAU, F.; CECILLON, L.; DECAENS, T. |
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Título: |
Effects of five earthworm species on soil structure and organic matter in LUVISOLs. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Earthworms are frequently cited as key stone soil organisms, however, their effects on soil
structure stability and organic matter (OM) in macro-aggregates are mainly driven by soil type
and land use. Loamy soils of the Bassin Parisien are mainly dedicated to intensive crop which
have led to soil degradation. Introduction of pastures is one of the most promising practices that
may restore them. The aim of this work is to quantify and compare, in laboratory experiments,
the effects of 5 earthworm species on soil OM. We hypothesize that direction and magnitude of
earthworm effects depend on (i) earthworm species and (ii) OM of the substrate hosting it.
Five earthworm species were retained for the experiment (Aporrectodea caliginosa,
Aporrectodea rosea, Allolobophora chlorotica, Aporrectodea icterica and Aporrectodea longa).
The superficial soil of 3 stands were sampled in May 2006: a 30 yrs intensive crop stand (CS);
a 5 yrs pasture (YP); a 46 yrs permanent pasture (PP). Soil (150 g of 2mm-sieved) was added
to microcosms and moistened at field capacity at the onset of the experiment. Three replicates
were set up for each treatment (species x substrate) and stored for 3 weeks in climate chambers.
C-CO2 release during the experiment was estimated by the conductivity method (Heemsbergen
et al., 2004). At the end of the experiment, soil was air-dried and dry-sieved at 2 mm to isolate
and weight the large macro-aggregate fraction (> 2mm, LMA). LMA were characterized by (i)
their organic matter content (loss-in-ignition at 550 °C); (ii) their stability estimated by the more
desegregating test of Le Bissonnais? (1996) method and expressed as the mean weight diameter
(MWD) and (iii) their organic composition assessed by Near Infrared Spectroscopy (NIRS, Antaris
II Thermo electron).
The C-CO2 release may result from quality or localisation of soil OM. The high C-CO2 release
observed in CS-microcosms hosting earthworm can be explained by the mineralization of a
labile OM pool. This hypothesis was confirmed by the decrease of OM content in LMA. On the
other hand, in pasture soils, the lack of C-CO2 release increase in earthworm presence may be
due to a physical or chemical protection of OM.
Globally the rate of LMA production decreased with soil OM content increase. On low OM content
soil, earthworms should ingest a larger amount of soil than on high OM content soil to cover the
energetic needs.
Aggregate structural stability produced in earthworms hosting microcosms was lower (CS soil),
similar (YP soil) and higher (PP soil) than in animal-free controls. Although the factor ?species?
mattered, short-term stabilisation mechanisms in those loamy soils were firstly linked to the
initial soil OM content.
Interpretation of NIRS spectra showed that the regular disturbance regime YP was submitted to
might have maintained OM biochemical composition similar to CS one and that the composition
of soil OM influence the capacities of earthworms to modify this OM composition.
Biodiversity, Conservation and
Sustainable Management of Soil Animals
August 25 - 29, 2008
Positivo University
Curitiba - Paraná - Brazil
We demonstrated that earthworm short-term effects depend on both earthworm species and
initial soil OM. These effects are complex and appear mainly in the more contrasted soils.
Conversely, in the 5-years old pasture soil, earthworm presence has very few effects. MenosEarthworms are frequently cited as key stone soil organisms, however, their effects on soil
structure stability and organic matter (OM) in macro-aggregates are mainly driven by soil type
and land use. Loamy soils of the Bassin Parisien are mainly dedicated to intensive crop which
have led to soil degradation. Introduction of pastures is one of the most promising practices that
may restore them. The aim of this work is to quantify and compare, in laboratory experiments,
the effects of 5 earthworm species on soil OM. We hypothesize that direction and magnitude of
earthworm effects depend on (i) earthworm species and (ii) OM of the substrate hosting it.
Five earthworm species were retained for the experiment (Aporrectodea caliginosa,
Aporrectodea rosea, Allolobophora chlorotica, Aporrectodea icterica and Aporrectodea longa).
The superficial soil of 3 stands were sampled in May 2006: a 30 yrs intensive crop stand (CS);
a 5 yrs pasture (YP); a 46 yrs permanent pasture (PP). Soil (150 g of 2mm-sieved) was added
to microcosms and moistened at field capacity at the onset of the experiment. Three replicates
were set up for each treatment (species x substrate) and stored for 3 weeks in climate chambers.
C-CO2 release during the experiment was estimated by the conductivity method (Heemsbergen
et al., 2004). At the end of the experiment, soil was air-dried and dry-sieved at 2 mm to isolate
and weight the large macro-aggregate fraction (> 2mm, LMA). LMA were characterized by (i)
their or... Mostrar Tudo |
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Categoria do assunto: |
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LEADER 04113naa a2200157 a 4500
001 1314907
005 2008-09-22
008 2008 bl uuuu u00u1 u #d
100 1 $aHEDDE, M.
245 $aEffects of five earthworm species on soil structure and organic matter in LUVISOLs.
260 $c2008
520 $aEarthworms are frequently cited as key stone soil organisms, however, their effects on soil structure stability and organic matter (OM) in macro-aggregates are mainly driven by soil type and land use. Loamy soils of the Bassin Parisien are mainly dedicated to intensive crop which have led to soil degradation. Introduction of pastures is one of the most promising practices that may restore them. The aim of this work is to quantify and compare, in laboratory experiments, the effects of 5 earthworm species on soil OM. We hypothesize that direction and magnitude of earthworm effects depend on (i) earthworm species and (ii) OM of the substrate hosting it. Five earthworm species were retained for the experiment (Aporrectodea caliginosa, Aporrectodea rosea, Allolobophora chlorotica, Aporrectodea icterica and Aporrectodea longa). The superficial soil of 3 stands were sampled in May 2006: a 30 yrs intensive crop stand (CS); a 5 yrs pasture (YP); a 46 yrs permanent pasture (PP). Soil (150 g of 2mm-sieved) was added to microcosms and moistened at field capacity at the onset of the experiment. Three replicates were set up for each treatment (species x substrate) and stored for 3 weeks in climate chambers. C-CO2 release during the experiment was estimated by the conductivity method (Heemsbergen et al., 2004). At the end of the experiment, soil was air-dried and dry-sieved at 2 mm to isolate and weight the large macro-aggregate fraction (> 2mm, LMA). LMA were characterized by (i) their organic matter content (loss-in-ignition at 550 °C); (ii) their stability estimated by the more desegregating test of Le Bissonnais? (1996) method and expressed as the mean weight diameter (MWD) and (iii) their organic composition assessed by Near Infrared Spectroscopy (NIRS, Antaris II Thermo electron). The C-CO2 release may result from quality or localisation of soil OM. The high C-CO2 release observed in CS-microcosms hosting earthworm can be explained by the mineralization of a labile OM pool. This hypothesis was confirmed by the decrease of OM content in LMA. On the other hand, in pasture soils, the lack of C-CO2 release increase in earthworm presence may be due to a physical or chemical protection of OM. Globally the rate of LMA production decreased with soil OM content increase. On low OM content soil, earthworms should ingest a larger amount of soil than on high OM content soil to cover the energetic needs. Aggregate structural stability produced in earthworms hosting microcosms was lower (CS soil), similar (YP soil) and higher (PP soil) than in animal-free controls. Although the factor ?species? mattered, short-term stabilisation mechanisms in those loamy soils were firstly linked to the initial soil OM content. Interpretation of NIRS spectra showed that the regular disturbance regime YP was submitted to might have maintained OM biochemical composition similar to CS one and that the composition of soil OM influence the capacities of earthworms to modify this OM composition. Biodiversity, Conservation and Sustainable Management of Soil Animals August 25 - 29, 2008 Positivo University Curitiba - Paraná - Brazil We demonstrated that earthworm short-term effects depend on both earthworm species and initial soil OM. These effects are complex and appear mainly in the more contrasted soils. Conversely, in the 5-years old pasture soil, earthworm presence has very few effects.
700 1 $aBUREAU, F.
700 1 $aCECILLON, L.
700 1 $aDECAENS, T.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
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Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
17/04/2008 |
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Data da última atualização: |
25/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - B |
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Autoria: |
BROWN, G. G.; JAMES, S. W.; PASINI, A.; NUNES, D. H.; BENITO, N. P.; MARTINS, P. T.; SAUTTER, K. D. |
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Afiliação: |
GEORGE GARDNER BROWN, CNPF; SAMUEL WOOSTER JAMES, University of Kansas; AMARILDO PASINI, UEL; DAIANE H. NUNES, UEL; NORTON POLO BENITO, UEL; PRISCILA TRIGO MARTINS, UEL; KLAUS DIETER SAUTTER, Centro Universitário Positivo. |
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Título: |
Exotic, peregrine, and invasive earthworms in Brazil: diversity, distribution, and effects on soils and plants. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Caribbean Journal of Science, v. 42, n. 3, p. 339-358, 2006. |
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Idioma: |
Inglês |
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Conteúdo: |
Humans have transported exotic earthworms throughout the world, and in some situations these may become invasive, modifying soil properties and processes, and plant growth significantly; either positively or negatively. Fifty-one exotic and up to seven peregine native earthworm species are known from Brazil, generally from agroecosystems or other disturbed sites close to human habitations. Eight species are considered invasive, and another sixteen are potentially invasive; however, little is known of the effects of most of these species on plants, soil properties, processes, and native species. Lumbricids and some acanthodrilid species are found primarily in the south and southeast of Brazil, where the cooler subtropical climate is more suitable to their activities. Other acanthodrilids (primarily Dichogaster spp.), the megascolecid Amynthas spp. and Pontoscolex corethrurus are widespread throughout Brazil, and sometimes invade native ecosystems, thus serving as disturbance indicators. However, only a few earthworm species have been studied in more detail, mainly the Amynthas spp. and P. corethrurus. Available results seem to indicate that the activities of these earthworm species can lead to both positive and negative effects on soils, plants and the native biota, and that this may depend on the site’s characteristics (soil, climate and vegetation types). Nevertheless, considering the large diversity of earthworms in Brazil, and the little available information, much more work is warranted (and urgently necessary) to adequately assess and predict the diversity, distribution and potential environmental impacts, positive or negative, of invasive earthworms in Brazil. MenosHumans have transported exotic earthworms throughout the world, and in some situations these may become invasive, modifying soil properties and processes, and plant growth significantly; either positively or negatively. Fifty-one exotic and up to seven peregine native earthworm species are known from Brazil, generally from agroecosystems or other disturbed sites close to human habitations. Eight species are considered invasive, and another sixteen are potentially invasive; however, little is known of the effects of most of these species on plants, soil properties, processes, and native species. Lumbricids and some acanthodrilid species are found primarily in the south and southeast of Brazil, where the cooler subtropical climate is more suitable to their activities. Other acanthodrilids (primarily Dichogaster spp.), the megascolecid Amynthas spp. and Pontoscolex corethrurus are widespread throughout Brazil, and sometimes invade native ecosystems, thus serving as disturbance indicators. However, only a few earthworm species have been studied in more detail, mainly the Amynthas spp. and P. corethrurus. Available results seem to indicate that the activities of these earthworm species can lead to both positive and negative effects on soils, plants and the native biota, and that this may depend on the site’s characteristics (soil, climate and vegetation types). Nevertheless, considering the large diversity of earthworms in Brazil, and the little available information, much more w... Mostrar Tudo |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Biodiversidade; Biogeografia; Minhoca. |
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Thesaurus NAL: |
Oligochaeta. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02425naa a2200253 a 4500
001 1304743
005 2015-02-25
008 2006 bl uuuu u00u1 u #d
100 1 $aBROWN, G. G.
245 $aExotic, peregrine, and invasive earthworms in Brazil$bdiversity, distribution, and effects on soils and plants.$h[electronic resource]
260 $c2006
520 $aHumans have transported exotic earthworms throughout the world, and in some situations these may become invasive, modifying soil properties and processes, and plant growth significantly; either positively or negatively. Fifty-one exotic and up to seven peregine native earthworm species are known from Brazil, generally from agroecosystems or other disturbed sites close to human habitations. Eight species are considered invasive, and another sixteen are potentially invasive; however, little is known of the effects of most of these species on plants, soil properties, processes, and native species. Lumbricids and some acanthodrilid species are found primarily in the south and southeast of Brazil, where the cooler subtropical climate is more suitable to their activities. Other acanthodrilids (primarily Dichogaster spp.), the megascolecid Amynthas spp. and Pontoscolex corethrurus are widespread throughout Brazil, and sometimes invade native ecosystems, thus serving as disturbance indicators. However, only a few earthworm species have been studied in more detail, mainly the Amynthas spp. and P. corethrurus. Available results seem to indicate that the activities of these earthworm species can lead to both positive and negative effects on soils, plants and the native biota, and that this may depend on the site’s characteristics (soil, climate and vegetation types). Nevertheless, considering the large diversity of earthworms in Brazil, and the little available information, much more work is warranted (and urgently necessary) to adequately assess and predict the diversity, distribution and potential environmental impacts, positive or negative, of invasive earthworms in Brazil.
650 $aOligochaeta
650 $aBiodiversidade
650 $aBiogeografia
650 $aMinhoca
653 $aBrasil
700 1 $aJAMES, S. W.
700 1 $aPASINI, A.
700 1 $aNUNES, D. H.
700 1 $aBENITO, N. P.
700 1 $aMARTINS, P. T.
700 1 $aSAUTTER, K. D.
773 $tCaribbean Journal of Science$gv. 42, n. 3, p. 339-358, 2006.
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