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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
16/10/2018 |
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Data da última atualização: |
19/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FU, Z.; GERKEN, T.; BROMLEY, G.; ARAUJO, A. C. de; BONAL, D.; BURBAN, B.; FICKLIN, D.; FUENTES, J. D.; GOULDEN, M.; HIRANO, T.; KOSUGI, Y.; LIDDELL, M.; NICOLINI, G.; NIU, S.; ROUPSARD, O.; STEFANI, P.; MI, C.; TOFTE, Z.; XIAO, J.; VALENTINI, R.; WOLF, S.; STOY, P. C. |
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Afiliação: |
Zheng Fu, Montana State University / Chinese Academy of Sciences / University of Chinese Academy of Sciences; Tobias Gerken, Montana State University; Gabriel Bromley, Montana State University; ALESSANDRO CARIOCA DE ARAUJO, CPATU; Damien Bonal, Université de Lorraine; Benoît Burban, INRA; Darren Ficklin, Indiana University; Jose D. Fuentes, The Pennsylvania State University; Michael Goulden, University of California; Takashi Hirano, Hokkaido University; Yoshiko Kosugi, Kyoto University; Michael Liddell, James Cook University / James Cook University; Giacomo Nicolini, University of Tuscia / Euro-Mediterranean Center on Climate Change; Shuli Niu, Chinese Academy of Sciences; Olivier Roupsard, CIRAD / CATIE; Paolo Stefani, University of Tuscia; Chunrong Mi, University of Chinese Academy of Sciences; Zaddy Tofte, Montana State University; Jingfeng Xiao, University of New Hampshire; Riccardo Valentini, University of Tuscia / Euro-Mediterranean Center on Climate Change; Sebastian Wolf, ETH Zurich; Paul C. Stoy, Montana State University. |
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Título: |
The surface-atmosphere exchange of carbon dioxide in tropical rainforests: sensitivity to environmental drivers and flux measurement methodology. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 263, p. 292-307, Dec. 2018. |
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DOI: |
10.1016/j.agrformet.2018.09.001 |
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Idioma: |
Inglês |
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Conteúdo: |
Tropical rainforests play a central role in the Earth system by regulating climate, maintaining biodiversity, and sequestering carbon. They are under threat by direct anthropogenic impacts like deforestation and the indirect anthropogenic impacts of climate change. A synthesis of the factors that determine the net ecosystem exchange of carbon dioxide (NEE) at the site scale across different forests in the tropical rainforest biome has not been undertaken to date. Here, we study NEE and its components, gross ecosystem productivity (GEP) and ecosystem respiration (RE), across thirteen natural and managed forests within the tropical rainforest biome with 63 total site-years of eddy covariance data. Our results reveal that the five ecosystems with the largest annual gross carbon uptake by photosynthesis (i.e. GEP3000g C m-2 y-1) have the lowest net carbon uptake ? or even carbon losses ? versus other study ecosystems because RE is of a similar magnitude. Sites that provided subcanopy CO2 storage observations had higher average magnitudes of GEP and RE and lower average magnitudes of NEE, highlighting the importance of measurement methodology for understanding carbon dynamics in ecosystems with characteristically tall and dense vegetation. A path analysis revealed that vapor pressure deficit (VPD) played a greater role than soil moisture or air temperature in constraining GEP under light saturated conditions across most study sites, but to differing degrees from -0.31 to -0.87umol CO2 m-2 s-1 hPa-1. Climate projections from 13 general circulation models (CMIP5) under the representative concentration pathway that generates 8.5W m-2 of radiative forcing suggest that many current tropical rainforest sites on the lower end of the current temperature range are likely to reach a climate space similar to present-day warmer sites by the year 2050, warmer sites will reach a climate not currently experienced, and all forests are likely to experience higher VPD. Results demonstrate the need to quantify if and how mature tropical trees acclimate to heat and water stress, and to further develop flux-partitioning and gap-filling algorithms for defensible estimates of carbon exchange in tropical rainforests. MenosTropical rainforests play a central role in the Earth system by regulating climate, maintaining biodiversity, and sequestering carbon. They are under threat by direct anthropogenic impacts like deforestation and the indirect anthropogenic impacts of climate change. A synthesis of the factors that determine the net ecosystem exchange of carbon dioxide (NEE) at the site scale across different forests in the tropical rainforest biome has not been undertaken to date. Here, we study NEE and its components, gross ecosystem productivity (GEP) and ecosystem respiration (RE), across thirteen natural and managed forests within the tropical rainforest biome with 63 total site-years of eddy covariance data. Our results reveal that the five ecosystems with the largest annual gross carbon uptake by photosynthesis (i.e. GEP3000g C m-2 y-1) have the lowest net carbon uptake ? or even carbon losses ? versus other study ecosystems because RE is of a similar magnitude. Sites that provided subcanopy CO2 storage observations had higher average magnitudes of GEP and RE and lower average magnitudes of NEE, highlighting the importance of measurement methodology for understanding carbon dynamics in ecosystems with characteristically tall and dense vegetation. A path analysis revealed that vapor pressure deficit (VPD) played a greater role than soil moisture or air temperature in constraining GEP under light saturated conditions across most study sites, but to differing degrees from -0.31 to -0.87umo... Mostrar Tudo |
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Palavras-Chave: |
Respiração do ecossistema; Variabilidade climática. |
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Thesagro: |
Dióxido de Carbono; Floresta Tropical. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03464naa a2200433 a 4500
001 2097454
005 2022-05-19
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1016/j.agrformet.2018.09.001$2DOI
100 1 $aFU, Z.
245 $aThe surface-atmosphere exchange of carbon dioxide in tropical rainforests$bsensitivity to environmental drivers and flux measurement methodology.$h[electronic resource]
260 $c2018
520 $aTropical rainforests play a central role in the Earth system by regulating climate, maintaining biodiversity, and sequestering carbon. They are under threat by direct anthropogenic impacts like deforestation and the indirect anthropogenic impacts of climate change. A synthesis of the factors that determine the net ecosystem exchange of carbon dioxide (NEE) at the site scale across different forests in the tropical rainforest biome has not been undertaken to date. Here, we study NEE and its components, gross ecosystem productivity (GEP) and ecosystem respiration (RE), across thirteen natural and managed forests within the tropical rainforest biome with 63 total site-years of eddy covariance data. Our results reveal that the five ecosystems with the largest annual gross carbon uptake by photosynthesis (i.e. GEP3000g C m-2 y-1) have the lowest net carbon uptake ? or even carbon losses ? versus other study ecosystems because RE is of a similar magnitude. Sites that provided subcanopy CO2 storage observations had higher average magnitudes of GEP and RE and lower average magnitudes of NEE, highlighting the importance of measurement methodology for understanding carbon dynamics in ecosystems with characteristically tall and dense vegetation. A path analysis revealed that vapor pressure deficit (VPD) played a greater role than soil moisture or air temperature in constraining GEP under light saturated conditions across most study sites, but to differing degrees from -0.31 to -0.87umol CO2 m-2 s-1 hPa-1. Climate projections from 13 general circulation models (CMIP5) under the representative concentration pathway that generates 8.5W m-2 of radiative forcing suggest that many current tropical rainforest sites on the lower end of the current temperature range are likely to reach a climate space similar to present-day warmer sites by the year 2050, warmer sites will reach a climate not currently experienced, and all forests are likely to experience higher VPD. Results demonstrate the need to quantify if and how mature tropical trees acclimate to heat and water stress, and to further develop flux-partitioning and gap-filling algorithms for defensible estimates of carbon exchange in tropical rainforests.
650 $aDióxido de Carbono
650 $aFloresta Tropical
653 $aRespiração do ecossistema
653 $aVariabilidade climática
700 1 $aGERKEN, T.
700 1 $aBROMLEY, G.
700 1 $aARAUJO, A. C. de
700 1 $aBONAL, D.
700 1 $aBURBAN, B.
700 1 $aFICKLIN, D.
700 1 $aFUENTES, J. D.
700 1 $aGOULDEN, M.
700 1 $aHIRANO, T.
700 1 $aKOSUGI, Y.
700 1 $aLIDDELL, M.
700 1 $aNICOLINI, G.
700 1 $aNIU, S.
700 1 $aROUPSARD, O.
700 1 $aSTEFANI, P.
700 1 $aMI, C.
700 1 $aTOFTE, Z.
700 1 $aXIAO, J.
700 1 $aVALENTINI, R.
700 1 $aWOLF, S.
700 1 $aSTOY, P. C.
773 $tAgricultural and Forest Meteorology$gv. 263, p. 292-307, Dec. 2018.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
22/11/2002 |
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Data da última atualização: |
28/02/2023 |
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Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
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Autoria: |
SILVA, C. A.; MACHADO, P. L. O. de A.; BERNARDI, A. C. de C.; CARMO, C. A. F. de S. do; VALENCIA, L. I. O.; ANDRADE, A. G. de; MEIRELLES, M. S. |
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Afiliação: |
CARLOS ALBERTO SILVA, UFLA; PEDRO LUIZ OLIVEIRA DE A MACHADO, CNPS; ALBERTO CARLOS DE CAMPOS BERNARDI, CNPS; CIRIACA ARCANGELA F DE S DO CARMO, CNPS; LUIZ IVAN O. VALENCIA, UFRJ; ALUISIO GRANATO DE ANDRADE, CNPS; MARGARETH GONCALVES SIMOES, CNPS. |
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Título: |
Amostragem de solo em área de soja sob plantio direto: uso de técnicas de agricultura de precisão. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Rio de Janeiro: Embrapa Solos, 2002. |
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Páginas: |
8 p. |
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Série: |
(Embrapa Solos. Comunicado técnico, 10). |
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ISSN: |
1517-5685 |
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Idioma: |
Português |
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Conteúdo: |
Este estudo teve como objetivo identificar o número de amostras de solo a serem coletadas no sentido de representar o grau da fertilidade das camadas de solo sob plantio direto, utilizado-se para isso técnicas de posicionamento geográfico das amostras de solo coletadas em área de soja sob plantio direto há cerca de 12 anos. |
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Palavras-Chave: |
Amostragem de solo; Técnica. |
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Thesagro: |
Agricultura de Precisão; Plantio Direto; Soja. |
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Categoria do assunto: |
--
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPS/10686/1/comtec102002amostsolosoja.pdf
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Marc: |
LEADER 01147nam a2200277 a 4500
001 1337786
005 2023-02-28
008 2002 bl uuuu u0uu1 u #d
022 $a1517-5685
100 1 $aSILVA, C. A.
245 $aAmostragem de solo em área de soja sob plantio direto$buso de técnicas de agricultura de precisão.
260 $aRio de Janeiro: Embrapa Solos$c2002
300 $a8 p.
490 $a(Embrapa Solos. Comunicado técnico, 10).
520 $aEste estudo teve como objetivo identificar o número de amostras de solo a serem coletadas no sentido de representar o grau da fertilidade das camadas de solo sob plantio direto, utilizado-se para isso técnicas de posicionamento geográfico das amostras de solo coletadas em área de soja sob plantio direto há cerca de 12 anos.
650 $aAgricultura de Precisão
650 $aPlantio Direto
650 $aSoja
653 $aAmostragem de solo
653 $aTécnica
700 1 $aMACHADO, P. L. O. de A.
700 1 $aBERNARDI, A. C. de C.
700 1 $aCARMO, C. A. F. de S. do
700 1 $aVALENCIA, L. I. O.
700 1 $aANDRADE, A. G. de
700 1 $aMEIRELLES, M. S.
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