1. Identificação | |
Tipo de Referência | Artigo em Revista Científica (Journal Article) |
Site | mtc-m21b.sid.inpe.br |
Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
Identificador | 8JMKD3MGP3W34P/3NNKT72 |
Repositório | sid.inpe.br/mtc-m21b/2017/04.19.15.27 (acesso restrito) |
Última Atualização | 2017:04.19.15.27.51 (UTC) administrator |
Repositório de Metadados | sid.inpe.br/mtc-m21b/2017/04.19.15.27.51 |
Última Atualização dos Metadados | 2018:06.04.02.27.24 (UTC) administrator |
DOI | 10.3389/fmars.2017.00026 |
ISSN | 2296-7745 |
Chave de Citação | Gagne-MaynardWKSCNBLDVKKR:2017:EvPrPr |
Título | Evaluation of primary production in the lower Amazon River based on a dissolved oxygen stable isotopic mass balance |
Ano | 2017 |
Mês | Feb. |
Data de Acesso | 02 maio 2024 |
Tipo de Trabalho | journal article |
Tipo Secundário | PRE PI |
Número de Arquivos | 1 |
Tamanho | 1846 KiB |
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2. Contextualização | |
Autor | 1 Gagne-Maynard, William C. 2 Ward, Nicholas D. 3 Keil, Richard G. 4 Sawakuchi, Henrique O. 5 Cunha, Alan C. da 6 Neu, Vania 7 Brito, Daimio C. 8 Less, Diani F. da Silva 9 Diniz, Joel E. M. 10 Valério, Aline de Matos 11 Kampel, Milton 12 Krusche, Alex V. 13 Richey, Jeffrey E. |
Identificador de Curriculo | 1 2 3 4 5 6 7 8 9 10 11 8JMKD3MGP5W/3C9JHTG |
Grupo | 1 2 3 4 5 6 7 8 9 10 SER-SRE-SESPG-INPE-MCTIC-GOV-BR 11 DIDSR-CGOBT-INPE-MCTIC-GOV-BR |
Afiliação | 1 University of Washington 2 University of Washington 3 University of Washington 4 University of Washington 5 Universidade Federal do Amapá (UFAP) 6 Universidade Federal Rural da Amazonia (UFRAM) 7 Universidade Federal do Amapá (UFAP) 8 Universidade Federal do Amapá (UFAP) 9 Universidade Federal do Amapá (UFAP) 10 Instituto Nacional de Pesquisas Espaciais (INPE) 11 Instituto Nacional de Pesquisas Espaciais (INPE) 12 Universidade de São Paulo (USP) 13 University of Washington |
Endereço de e-Mail do Autor | 1 2 nicholas.ward@pnnl.gov 3 4 5 6 7 8 9 10 11 milton.kampel@inpe.br |
Revista | Frontiers in Marine Science |
Volume | 4 |
Histórico (UTC) | 2017-04-19 15:30:13 :: simone -> administrator :: 2017 2018-06-04 02:27:24 :: administrator -> simone :: 2017 |
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3. Conteúdo e estrutura | |
É a matriz ou uma cópia? | é a matriz |
Estágio do Conteúdo | concluido |
Transferível | 1 |
Tipo do Conteúdo | External Contribution |
Tipo de Versão | publisher |
Palavras-Chave | Mass balance Oxygen Photosynthesis Respiration Tropical rivers |
Resumo | The Amazon River outgasses nearly an equivalent amount of CO2 as the rainforest sequesters on an annual basis due to microbial decomposition of terrigenous and aquatic organic matter. Most research performed in the Amazon has been focused on unraveling the mechanisms driving CO2 production since the recognition of a persistent state of CO2 supersaturation. However, although the river system is clearly net heterotrophic, the interplay between primary production and respiration is an essential aspect to understanding the overall metabolism of the ecosystem and potential transfer of energy up trophic levels. For example, an efficient ecosystem is capable of both decomposing high amounts of organic matter at lower trophic levels, driving CO2 emissions, and accumulating energy/biomass in higher trophic levels, stimulating fisheries production. Early studies found minimal evidence for primary production in the Amazon River mainstem and it has since been assumed that photosynthesis is strongly limited by low light penetration attributed to the high sediment load. Here, we test this assumption by measuring the stable isotopic composition of O2 (δ18O-O2) and O2 saturation levels in the lower Amazon River from óbidos to the river mouth and its major tributaries, the Xingu and Tapajós rivers, during high and low water periods. An oxygen mass balance model was developed to estimate the input of photosynthetic oxygen in the discrete reach from óbidos to Almeirim, midway to the river mouth. Based on the oxygen mass balance we estimate that primary production occurred at a rate of 0.39 ± 0.24 g O m3 d-1 at high water and 1.02 ± 0.55 g O m3 d-1 at low water. This translates to 41 ± 24% of the rate of O2 drawdown via respiration during high water and 67 ± 33% during low water. These primary production rates are 2-7 times higher than past estimates for the Amazon River mainstem. It is possible that at high water much of this productivity signal is the result of legacy advection from floodplains, whereas limited floodplain connectivity during low water implies that most of this signal is the result of in situ primary production in the Amazon River mainstem. |
Área | SRE |
Arranjo 1 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSR > Evaluation of primary... |
Arranjo 2 | urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > SER > Evaluation of primary... |
Conteúdo da Pasta doc | acessar |
Conteúdo da Pasta source | não têm arquivos |
Conteúdo da Pasta agreement | |
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4. Condições de acesso e uso | |
Idioma | en |
Arquivo Alvo | gagne_evaluation.pdf |
Grupo de Usuários | simone |
Grupo de Leitores | administrator simone |
Visibilidade | shown |
Permissão de Leitura | deny from all and allow from 150.163 |
Permissão de Atualização | não transferida |
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5. Fontes relacionadas | |
Unidades Imediatamente Superiores | 8JMKD3MGPCW/3ER446E 8JMKD3MGPCW/3F3NU5S |
Lista de Itens Citando | sid.inpe.br/mtc-m21/2012/07.13.14.56.38 1 |
Divulgação | PORTALCAPES; SCOPUS. |
Acervo Hospedeiro | sid.inpe.br/mtc-m21b/2013/09.26.14.25.20 |
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6. Notas | |
Campos Vazios | alternatejournal archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn label lineage mark mirrorrepository nextedition notes number orcid pages parameterlist parentrepositories previousedition previouslowerunit progress project rightsholder schedulinginformation secondarydate secondarykey secondarymark session shorttitle sponsor subject tertiarymark tertiarytype url |
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7. Controle da descrição | |
e-Mail (login) | simone |
atualizar | |
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