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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
01/10/1997 |
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Data da última atualização: |
05/04/2017 |
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Autoria: |
PARTON, W. J.; OJIMA, D. S.; SCHIMEL, D. S. |
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Título: |
Environmental change in grasslands: assessment using models. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Climate Change, v.28, p.111-141, Oct. 1994. |
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Idioma: |
Inglês |
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Conteúdo: |
Modeling studies and observed data suggest vthat plant production, species distribution, disturbance regimes, grassland biome boundaries and secondary production (i.e., animal productivity) could be affected by potential changes in climate and by changes in land use practices. There are may studies in which computer models have been used to assess the impact of climate changes on grassland ecosystems. A global assessment of climate change impacts suggest that some grassland ecosystems will have higher plant production (humid temperate grassland) while the production of extreme continental steppes (e.g., more arid regions of the temperate grasslands of North America and Eurassia) could be reduced substantially. All of the grassland system studied are projected to lose soil carbon, with the greatest losses in the extreme continental grassland systems. There are large differences in the project changes in plant production for some regions, while alterations in soil C are relatively similar over a range of climate change projections drawn from various General Circulation Models (GCM's ). The potential impact of climate change on cattle weight gains is unclear. The results of modeling studies also suggest that the direct impact of increased atmospheric CO2 on photosynthesis and water use in grassland must be considered since these direct impacts could be as large as those due to climatic changes. In addition to its direct effects on photosynthesis and water use, elevated CO2 concentrations lower N content and reduce digestibility of the forage. MenosModeling studies and observed data suggest vthat plant production, species distribution, disturbance regimes, grassland biome boundaries and secondary production (i.e., animal productivity) could be affected by potential changes in climate and by changes in land use practices. There are may studies in which computer models have been used to assess the impact of climate changes on grassland ecosystems. A global assessment of climate change impacts suggest that some grassland ecosystems will have higher plant production (humid temperate grassland) while the production of extreme continental steppes (e.g., more arid regions of the temperate grasslands of North America and Eurassia) could be reduced substantially. All of the grassland system studied are projected to lose soil carbon, with the greatest losses in the extreme continental grassland systems. There are large differences in the project changes in plant production for some regions, while alterations in soil C are relatively similar over a range of climate change projections drawn from various General Circulation Models (GCM's ). The potential impact of climate change on cattle weight gains is unclear. The results of modeling studies also suggest that the direct impact of increased atmospheric CO2 on photosynthesis and water use in grassland must be considered since these direct impacts could be as large as those due to climatic changes. In addition to its direct effects on photosynthesis and water use, elevated CO2 con... Mostrar Tudo |
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Palavras-Chave: |
Ecosystem; Grassland; Model; Modelo; Plant production. |
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Thesagro: |
Ecossistema; Pastagem Nativa; Planta; Produção. |
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Categoria do assunto: |
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Marc: |
LEADER 02193naa a2200253 a 4500
001 1791850
005 2017-04-05
008 1994 bl --- 0-- u #d
100 1 $aPARTON, W. J.
245 $aEnvironmental change in grasslands$bassessment using models.
260 $c1994
520 $aModeling studies and observed data suggest vthat plant production, species distribution, disturbance regimes, grassland biome boundaries and secondary production (i.e., animal productivity) could be affected by potential changes in climate and by changes in land use practices. There are may studies in which computer models have been used to assess the impact of climate changes on grassland ecosystems. A global assessment of climate change impacts suggest that some grassland ecosystems will have higher plant production (humid temperate grassland) while the production of extreme continental steppes (e.g., more arid regions of the temperate grasslands of North America and Eurassia) could be reduced substantially. All of the grassland system studied are projected to lose soil carbon, with the greatest losses in the extreme continental grassland systems. There are large differences in the project changes in plant production for some regions, while alterations in soil C are relatively similar over a range of climate change projections drawn from various General Circulation Models (GCM's ). The potential impact of climate change on cattle weight gains is unclear. The results of modeling studies also suggest that the direct impact of increased atmospheric CO2 on photosynthesis and water use in grassland must be considered since these direct impacts could be as large as those due to climatic changes. In addition to its direct effects on photosynthesis and water use, elevated CO2 concentrations lower N content and reduce digestibility of the forage.
650 $aEcossistema
650 $aPastagem Nativa
650 $aPlanta
650 $aProdução
653 $aEcosystem
653 $aGrassland
653 $aModel
653 $aModelo
653 $aPlant production
700 1 $aOJIMA, D. S.
700 1 $aSCHIMEL, D. S.
773 $tClimate Change$gv.28, p.111-141, Oct. 1994.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 2 | |
| 1. |  | WEILER, D. A.; TORNQUIST, C. G.; PARTON, W.; SANTOS, H. P. dos; SANTI, A.; BAYER, C. Crop biomass, soil carbon, and nitrous oxide as affected by management and climate: a DayCent application in Brazil. Soil Science Society of America Journal, Madison, v. 81, n. 4, p. 945-955, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Trigo. |
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| 2. | | PALM, C. A.; NOORDWIJK, M. van; WOOMER, P. L.; ALEGRE, J. C.; ARÉVALO, L.; CASTILLA, C. E.; CORDEIRO, D. G.; HAIRIAH, K.; KOTTO-SAME, J.; MOUKAM, A.; PARTON, W. J.; RICSE, A.; RODRIGUES, V. G. S.; SITOMPU, S. M. Carbon losses and sequestration with land use change in the humid tropics. In: PALM, C. A.; VOSTI, S. A.; SANCHEZ, P. A.; ERICKSEN, P. J. (ed.). Slash-and-burn agriculture: the search for alternatives. New York: Columbia University Press, 2005. cap. 2, p. 41-63.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| Registros recuperados : 2 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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