%0 Journal Article
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%X Background: Dissolved organic carbon (DOC) is a major component of the total carbon in headstreams in Amazonia. Long-term measurements of DOC concentration are difficult to obtain in remote areas of Amazonia.Aims: To take measurements of electrical conductivity (EC) and DOC concentration in a blackwater stream and to determine whether it is possible to make predictions of the DOC concentration in such streams using continuous measurements of EC alone.Methods: In a forested area, DOC concentration and EC were measured in groundwater along a topographic gradient at weekly intervals over a period of 8 months, and in stream water at half-hourly intervals over 2 years.Results: Strong and positive relationships between EC and DOC concentration were found in stream water in wet (r2 = 0.99) and dry periods (r2 = 0.97). It was thus possible to produce two equations that could be used to derive DOC concentration values from continuous measurements of EC. Both DOC concentration and EC varied according to the discharge, indicating that the largest amounts of DOC are transported during the wet season. The amount of carbon exported annually was estimated to be between 2.5% and 5% of the sink estimated by the eddy covariance method.Conclusions: The relationship found offers an opportunity for a comprehensive assessment of DOC concentration in blackwater catchments based on low-cost and simple EC measurements, rather than on expensive and complex estimates of DOC concentration.
%@mirrorrepository iconet.com.br/banon/2006/11.26.21.31
%N 1-2
%9 journal article
%T Dissolved organic carbon concentration and its relationship to electrical conductivity in the waters of a stream in a forested Amazonian blackwater catchment
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%@electronicmailaddress javier@cptec.inpe.br
%@secondarytype PRE PI
%K Amazon Basin, derived DOC concentration, dissolved organic carbon (DOC) concentration, electrical conductivity, forest streams, tropical rain forest.
%@usergroup administrator
%@usergroup marcelo.pazos@inpe.br
%@usergroup self-uploading-INPE-MCTI-GOV-BR
%@e-mailaddress marcelo.pazos@inpe.br
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%@group DOP-CPT-INPE-MCTI-GOV-BR
%@tertiarymark Trabalho não Vinculado à Tese/Dissertação
%@secondarymark B1_CIÊNCIAS_AGRÁRIAS_I B1_ENGENHARIAS_I B1_BIODIVERSIDADE B3_BIOTECNOLOGIA B4_CIÊNCIAS_BIOLÓGICAS_I
%F scopus 2013-11
%@issn 1755-0874
%2 sid.inpe.br/mtc-m21b/2013/11.26.16.47.58
%@affiliation Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
%@affiliation Universiteit Utrecht, Utrecht, The Netherlands
%@affiliation Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
%@affiliation Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
%@affiliation Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%B Plant Ecology & Diversity
%@versiontype publisher
%P 205-213
%4 sid.inpe.br/mtc-m21b/2013/11.26.16.47.57
%@documentstage not transferred
%D 2014
%V 7
%@doi 10.1080/17550874.2013.820223
%A Monteiro, Maria T. F.,
%A Oliveira, Sylvia M.,
%A Luizão, Flávio J.,
%A Cândido, Luiz A.,
%A Ishida, Françoise Y.,
%A Tomasella, Javier,
%@dissemination WEBSCI; PORTALCAPES; SCOPUS.
%@area MET