@Article{MonteiroOlLuCâIsTo:2014:DiOrCa,
               author = "Monteiro, Maria T. F. and Oliveira, Sylvia M. and Luiz{\~a}o, 
                         Fl{\'a}vio J. and C{\^a}ndido, Luiz A. and Ishida, 
                         Fran{\c{c}}oise Y. and Tomasella, Javier",
          affiliation = "Instituto Nacional de Pesquisas da Amaz{\^o}nia, Manaus, Brazil 
                         and Universiteit Utrecht, Utrecht, The Netherlands and Instituto 
                         Nacional de Pesquisas da Amaz{\^o}nia, Manaus, Brazil and 
                         Instituto Nacional de Pesquisas da Amaz{\^o}nia, Manaus, Brazil 
                         and Instituto Nacional de Pesquisas da Amaz{\^o}nia, Manaus, 
                         Brazil and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Dissolved organic carbon concentration and its relationship to 
                         electrical conductivity in the waters of a stream in a forested 
                         Amazonian blackwater catchment",
              journal = "Plant Ecology \& Diversity",
                 year = "2014",
               volume = "7",
               number = "1-2",
                pages = "205--213",
             keywords = "Amazon Basin, derived DOC concentration, dissolved organic carbon 
                         (DOC) concentration, electrical conductivity, forest streams, 
                         tropical rain forest.",
             abstract = "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.",
                  doi = "10.1080/17550874.2013.820223",
                  url = "http://dx.doi.org/10.1080/17550874.2013.820223",
                 issn = "1755-0874",
                label = "scopus 2013-11",
             language = "en",
        urlaccessdate = "27 abr. 2024"
}