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1. Identificação
Tipo de ReferênciaArtigo em Revista Científica (Journal Article)
Sitemtc-m21b.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34P/3NNKT72
Repositóriosid.inpe.br/mtc-m21b/2017/04.19.15.27   (acesso restrito)
Última Atualização2017:04.19.15.27.51 (UTC) administrator
Repositório de Metadadossid.inpe.br/mtc-m21b/2017/04.19.15.27.51
Última Atualização dos Metadados2018:06.04.02.27.24 (UTC) administrator
DOI10.3389/fmars.2017.00026
ISSN2296-7745
Chave de CitaçãoGagne-MaynardWKSCNBLDVKKR:2017:EvPrPr
TítuloEvaluation of primary production in the lower Amazon River based on a dissolved oxygen stable isotopic mass balance
Ano2017
MêsFeb.
Data de Acesso01 maio 2024
Tipo de Trabalhojournal article
Tipo SecundárioPRE PI
Número de Arquivos1
Tamanho1846 KiB
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
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10
11 8JMKD3MGP5W/3C9JHTG
Grupo 1
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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
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11 milton.kampel@inpe.br
RevistaFrontiers in Marine Science
Volume4
Histórico (UTC)2017-04-19 15:30:13 :: simone -> administrator :: 2017
2018-06-04 02:27:24 :: administrator -> simone :: 2017
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
Tipo de Versãopublisher
Palavras-ChaveMass balance
Oxygen
Photosynthesis
Respiration
Tropical rivers
ResumoThe 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.
ÁreaSRE
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4. Condições de acesso e uso
Idiomaen
Arquivo Alvogagne_evaluation.pdf
Grupo de Usuáriossimone
Grupo de Leitoresadministrator
simone
Visibilidadeshown
Permissão de Leituradeny from all and allow from 150.163
Permissão de Atualizaçãonão transferida
5. Fontes relacionadas
Unidades Imediatamente Superiores8JMKD3MGPCW/3ER446E
8JMKD3MGPCW/3F3NU5S
Lista de Itens Citandosid.inpe.br/mtc-m21/2012/07.13.14.56.38 1
DivulgaçãoPORTALCAPES; SCOPUS.
Acervo Hospedeirosid.inpe.br/mtc-m21b/2013/09.26.14.25.20
6. Notas
Campos Vaziosalternatejournal 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
7. Controle da descrição
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