Effects of increasing organic matter loading on the dissolved O2, free dissolved CO2 and respiration rates in the Piracicaba River basin, Southeast Brazil

Ballester, Maria Victória Ramos; Martinelli, Luiz Antônio; Krusche, Alex V.; Victória, Reynaldo Luiz; Bernardes, Marcelo; Camargo, Plínio Barbosa de

doi:10.1016/s0043-1354(98)00438-2

Cited by 54 publications

(58 citation statements)

References 11 publications

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“…BOD -biochemistry oxygen demand, EC -electrical conductivity, DOdissolved oxygen, Ca -dissolved calcium, TSS -total suspended solids, DOC -dissolved organic carbon, POCparticulate organic carbon, TOC -total organic carbon. Adapted from Ballester et al (1999) and Domingues (2000).…”

Section: Description Of the Study Areamentioning

confidence: 99%

“…Most of the domestic sewage and industrial effluents with high organic matter are discharged into rivers without prior treatment. This extra organic matter has caused several biogeochemical changes, both in small streams (Daniel et al, 2002;Ometto et al, 2000) and in larger rivers (Krusche et al, 1997;Ballester et al, 1999;Martinelli et al, 1999aMartinelli et al, , 1999b and could be also a source of heavy metals in these water bodies. Although less important, non-point source pollution is also present in such impacted watersheds, mainly in agricultural areas, where the use of fertilizers and agrochemicals also may contribute as sources of heavy metals to the aquatic environment (Manly and George, 1977;Novotny, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Biomonitoring of Pb and Cd in two impacted watersheds in Southeast Brazil, using the freshwater mussel Anodontites trapesialis (Lamarck, 1819) (Bivalvia : Mycetopodidae) as a biological monitor

Tomazelli

Martinelli

Avelar

et al. 2003

Braz. arch. biol. technol.

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Section: Description Of the Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biomonitoring of Pb and Cd in two impacted watersheds in Southeast Brazil, using the freshwater mussel Anodontites trapesialis (Lamarck, 1819) (Bivalvia : Mycetopodidae) as a biological monitor

Tomazelli

Martinelli

Avelar

et al. 2003

Braz. arch. biol. technol.

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“…Several studies in tropical watersheds evaluated the impact of urbanization and agricultural practices on water quality (Ballester et al 1999, Neill et al 2001, Biggs et al 2004, Salomão et al 2008, Germer et al 2009, Andrade et al 2011. Studies in subcatchments in southeastern and southern Brazil have shown that small streams are severely affected by urbanization and agricultural practices such as pastures, considerably increasing dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) (Daniel et al 2002 in addition to several ions such as nitrate, chloride and ammonium , Germer et al 2009, Andrade et al 2011.…”

Section: Introductionmentioning

confidence: 99%

Influence of land use changes on water chemistry in streams in the State of São Paulo, southeast Brazil

Silva

Camargo

McDowell

et al. 2012

An. Acad. Bras. Ciênc.

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Streamwater is affected by several processes in the watershed including anthropogenic activities that result in changes in water quality as well as in the functioning of these stream ecosystems. Therefore, this work aims to evaluate the concentration of major ions (Ca ) in streams in the state of São Paulo (southeast Brazil). The sampling sites are located at undisturbed (ombrophilus dense forest, semideciduous forest and savanna -cerrado) and disturbed areas (pasture, urbanization and sugar cane crops). Streamwater chemistry varied according to land use change and, in general, was higher in disturbed sites. Streams located in undisturbed sites at Ribeira de Iguape/Alto Paranapanema watershed (streams 1, 2 and 3) seem to be regulated by soil characteristics, as the disturbed streams located at the same watershed covered by pasture (stream 7) showed high concentration for the most of the variables. Exception to streams located at Pontal do Paranapanema watershed where both disturbed (stream 8) and undisturbed streams (stream 4 and 5) presented similar patterns for almost all variables measured.

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“…Reports on carbon and nitrogen budgets in small watersheds, where channel conditions are less variable than in meso-scale watersheds, are widely found in the literature (McDowell & Asbury, 1994;Alexander et al, 2000;Biggs et al, 2004). In addition, studies in tropical watersheds are generally related to the impact of urbanization and agricultural practices on water quality (Krusche et al, 1997;Ballester et al, 1999;Markevitz et al, 2000;Daniel et al, 2002;Marques et al, 2003;Biggs et al, 2004;Mokaya et al, 2004;Thomaz et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Can land use changes alter carbon, nitrogen and major ion transport in subtropical brazilian streams?

Silva

Ometto

Lobo

et al. 2007

Sci. agric. (Piracicaba, Braz.)

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Several studies in tropical watersheds have evaluated the impact of urbanization and agricultural practices on water quality. In Brazil, savannas (known regionally as Cerrados) represent 23% of the country's surface, representing an important share to the national primary growth product, especially due to intense agriculture. The purpose of this study is to present a comprehensive evaluation, on a yearly basis, of carbon, nitrogen and major ion fluxes in streams crossing areas under different land use (natural vegetation, sugar cane and eucalyptus) in a savanna region of SE Brazil. Eucalyptus and sugar cane alter the transport of the investigated elements in small watersheds. The highest concentration of all parameters (abiotic parameters, ions, dissolved organic carbon -DOC -and dissolved inorganic carbon -DIC) were found in Sugar Cane Watersheds (SCW). The observed concentrations of major cations in Eucalyptus Watersheds (EW) (Mg, Ca, K, Na), as well as DIN and DOC, were found frequently to be intermediate values between those of Savanna Watersheds (SW) and SCW, suggesting a moderate impact of eucalyptus plantations on the streamwater. Same trends were found in relation to ion and nutrient fluxes, where the higher values corresponded to SCW. It is suggested that sugar cane plantations might be playing an important role in altering the chemistry of water bodies.

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Effects of increasing organic matter loading on the dissolved O2, free dissolved CO2 and respiration rates in the Piracicaba River basin, Southeast Brazil

Cited by 54 publications

References 11 publications

Biomonitoring of Pb and Cd in two impacted watersheds in Southeast Brazil, using the freshwater mussel Anodontites trapesialis (Lamarck, 1819) (Bivalvia : Mycetopodidae) as a biological monitor

Biomonitoring of Pb and Cd in two impacted watersheds in Southeast Brazil, using the freshwater mussel Anodontites trapesialis (Lamarck, 1819) (Bivalvia : Mycetopodidae) as a biological monitor

Influence of land use changes on water chemistry in streams in the State of São Paulo, southeast Brazil

Can land use changes alter carbon, nitrogen and major ion transport in subtropical brazilian streams?

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