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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
18/09/2008 |
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Data da última atualização: |
18/09/2008 |
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Autoria: |
CALLAHAM JUNIOR, M. A.; O'BRIEN, J. J.; HENDRIX, P. F.; CAMP, D. L.; BENNETT, S. R. |
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Título: |
Carbon and nitrogen dynamics in soils with native North American and introduced European earthworms determined with stable isotopes. |
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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: |
There is very little known about interactions between native and introduced earthworms in forested
soils of southeastern North America. We conducted a growth chamber study using 13C labeled
white oak (Quercus alba) seedlings and 15N labeled oak litter in mesocosms (10 cm dia., 20
cm depth) to examine the effects of native and exotic earthworms on plant growth, and C and N
dynamics. Three earthworm species with different ecological strategies and origins (Diplocardia
sylvicola, Octolasion tyrtaeum, and Lumbricus rubellus) were used in an incomplete factorial
experimental design to examine the dynamics of C and N in soil, plant and earthworm biomass
pools. Six experimental groupings were established: 1) Native endogeic alone; 2) Exotic
endogeic alone; 3) Exotic epigeic alone; 4) Native endogeic with exotic endogeic; 5) Native
endogeic, exotic endogeic, and exotic epigeic together; and 6) No earthworms (control). On
two sample dates (3 and 6 wk) mesocosms were destructively sampled for: soil 0-5 cm, soil 5-
20 cm, coarse root material, fine root material, leaves, stems, and earthworm tissue. Results
from the earthworm tissue analysis indicated no difference in the delta-13-C signatures of any
worms in any combination, but tissue analysis for delta-15-N signatures indicated strong
differences between species. In single species pots, Lumbricus rubellus exhibited the greatest
level of enrichment with delta-15-N signatures reaching nearly 200?. The pots with two endogeic
species together revealed a possibly competitive interaction between native and exotic endogees
with O. tyrtaeum having the largest delta-15-N signature (mean signature of 56? for O. tyrtaeum
vs. 30? for D. sylvicola). In the pots with the three species mix, the endogeic species (both
native and exotic) took up less 15N than when in competition with only one another, and L.
rubellus took up more 15N than when grown in isolation. Data from plant tissue and soil analysis
for? delta-13-C and delta-15-N will also be presented and discussed MenosThere is very little known about interactions between native and introduced earthworms in forested
soils of southeastern North America. We conducted a growth chamber study using 13C labeled
white oak (Quercus alba) seedlings and 15N labeled oak litter in mesocosms (10 cm dia., 20
cm depth) to examine the effects of native and exotic earthworms on plant growth, and C and N
dynamics. Three earthworm species with different ecological strategies and origins (Diplocardia
sylvicola, Octolasion tyrtaeum, and Lumbricus rubellus) were used in an incomplete factorial
experimental design to examine the dynamics of C and N in soil, plant and earthworm biomass
pools. Six experimental groupings were established: 1) Native endogeic alone; 2) Exotic
endogeic alone; 3) Exotic epigeic alone; 4) Native endogeic with exotic endogeic; 5) Native
endogeic, exotic endogeic, and exotic epigeic together; and 6) No earthworms (control). On
two sample dates (3 and 6 wk) mesocosms were destructively sampled for: soil 0-5 cm, soil 5-
20 cm, coarse root material, fine root material, leaves, stems, and earthworm tissue. Results
from the earthworm tissue analysis indicated no difference in the delta-13-C signatures of any
worms in any combination, but tissue analysis for delta-15-N signatures indicated strong
differences between species. In single species pots, Lumbricus rubellus exhibited the greatest
level of enrichment with delta-15-N signatures reaching nearly 200?. The pots with two endogeic
species to... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02832naa a2200169 a 4500
001 1314872
005 2008-09-18
008 2008 bl uuuu u00u1 u #d
100 1 $aCALLAHAM JUNIOR, M. A.
245 $aCarbon and nitrogen dynamics in soils with native North American and introduced European earthworms determined with stable isotopes.
260 $c2008
520 $aThere is very little known about interactions between native and introduced earthworms in forested soils of southeastern North America. We conducted a growth chamber study using 13C labeled white oak (Quercus alba) seedlings and 15N labeled oak litter in mesocosms (10 cm dia., 20 cm depth) to examine the effects of native and exotic earthworms on plant growth, and C and N dynamics. Three earthworm species with different ecological strategies and origins (Diplocardia sylvicola, Octolasion tyrtaeum, and Lumbricus rubellus) were used in an incomplete factorial experimental design to examine the dynamics of C and N in soil, plant and earthworm biomass pools. Six experimental groupings were established: 1) Native endogeic alone; 2) Exotic endogeic alone; 3) Exotic epigeic alone; 4) Native endogeic with exotic endogeic; 5) Native endogeic, exotic endogeic, and exotic epigeic together; and 6) No earthworms (control). On two sample dates (3 and 6 wk) mesocosms were destructively sampled for: soil 0-5 cm, soil 5- 20 cm, coarse root material, fine root material, leaves, stems, and earthworm tissue. Results from the earthworm tissue analysis indicated no difference in the delta-13-C signatures of any worms in any combination, but tissue analysis for delta-15-N signatures indicated strong differences between species. In single species pots, Lumbricus rubellus exhibited the greatest level of enrichment with delta-15-N signatures reaching nearly 200?. The pots with two endogeic species together revealed a possibly competitive interaction between native and exotic endogees with O. tyrtaeum having the largest delta-15-N signature (mean signature of 56? for O. tyrtaeum vs. 30? for D. sylvicola). In the pots with the three species mix, the endogeic species (both native and exotic) took up less 15N than when in competition with only one another, and L. rubellus took up more 15N than when grown in isolation. Data from plant tissue and soil analysis for? delta-13-C and delta-15-N will also be presented and discussed
700 1 $aO'BRIEN, J. J.
700 1 $aHENDRIX, P. F.
700 1 $aCAMP, D. L.
700 1 $aBENNETT, S. R.
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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Registro original: |
Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
30/10/2003 |
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Data da última atualização: |
11/02/2014 |
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Autoria: |
RIBASKI, J.; RAKOCEVIC, M. |
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Afiliação: |
Ribaski, pesquisador e Rakocevic, consultora da Embrapa Florestas. |
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Título: |
Disponibilidade e qualidade da forragem de braquiária (Brachyaria bryzantha) em um sistema silvipastoril com eucalipto (Eucalyptus citriodora) no noroeste do estado do Paraná. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 4., 2002, Ilhéus. Sistemas agroflorestais, tendência da agricultura ecológica nos trópicos: sustento da vida e sustento de vida: anais. Ilhéus: CEPLAC, 2002. |
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Idioma: |
Português |
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Notas: |
1 CD-ROM. |
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Palavras-Chave: |
Bbraquiária; Brachyaria bryzantha; Noroeste; Paraná; Sistema silvipastoril. |
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Thesagro: |
Eucalipto; Eucalyptus Citriodora. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/97045/1/6026disponibilidade.pdf
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Marc: |
LEADER 00870naa a2200217 a 4500
001 1307621
005 2014-02-11
008 2002 bl uuuu u00u1 u #d
100 1 $aRIBASKI, J.
245 $aDisponibilidade e qualidade da forragem de braquiária (Brachyaria bryzantha) em um sistema silvipastoril com eucalipto (Eucalyptus citriodora) no noroeste do estado do Paraná.
260 $c2002
500 $a1 CD-ROM.
650 $aEucalipto
650 $aEucalyptus Citriodora
653 $aBbraquiária
653 $aBrachyaria bryzantha
653 $aNoroeste
653 $aParaná
653 $aSistema silvipastoril
700 1 $aRAKOCEVIC, M.
773 $tIn: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 4., 2002, Ilhéus. Sistemas agroflorestais, tendência da agricultura ecológica nos trópicos: sustento da vida e sustento de vida: anais. Ilhéus: CEPLAC, 2002.
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