2013
DOI: 10.14295/holos.v13i2.7344
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Classificação Dos Rios Da Amazônia: Uma Estratégia Para Preservação Desses Recursos

Abstract: A classificação dos rios da Amazônia vai auxiliar na gestão e preservação desses recursos. O estudo avaliou as variáveis, cor, pH, oxigênio dissolvido (OD), turbidez e íon amônio (NH4+) nos rios da Amazônia e comparou aos padrões estabelecidos na classe 2 da Resolução nº 357/2005, do CONAMA. Foram coletadas 228 amostras em 17 locais ao longo do rio Amazonas e em 39 tributários, no período de outubro/2008 a novembro/2011. No rio Amazonas e tributários, o pH variou de 4,51 a 7,53 e OD com valores inferiores a 5,… Show more

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Cited by 25 publications
(39 citation statements)
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“…The resistance of tambaqui to an acidic environment is due to its adaption to the wide pH range of the Amazonian rivers, home of this species. This fish is naturally found in the Negro River (pH 4.7) and Solimoes/Amazonas River (pH~6.8) (da Silva et al 2013). It is important to highlight that the values in Table 1 were obtained from experimental results in different production systems that, in some cases, did not evaluate specifically the parameters mentioned and only reported them as excellent for the species.…”
Section: Discussionmentioning
confidence: 99%
“…The resistance of tambaqui to an acidic environment is due to its adaption to the wide pH range of the Amazonian rivers, home of this species. This fish is naturally found in the Negro River (pH 4.7) and Solimoes/Amazonas River (pH~6.8) (da Silva et al 2013). It is important to highlight that the values in Table 1 were obtained from experimental results in different production systems that, in some cases, did not evaluate specifically the parameters mentioned and only reported them as excellent for the species.…”
Section: Discussionmentioning
confidence: 99%
“…The sediment load in the water column is also one of the factors that interfere in the oxygen availability (Silva et al., 2013), it explains the low values of dissolved oxygen found in the Amazon river when compared to the levels recorded in the Tapajós river. However, the low values are considered natural and the organisms of this environment are adapted to this condition.…”
Section: Discussionmentioning
confidence: 99%
“…The aquatic environments of the Amazon region present a wide environmental heterogeneity in the rivers that form the watershed and are influenced by the different landscape formations composed by interactive ecosystems and climatic, geological and vegetation conditions (Rebouças et al., 1999; Silva et al., 2013). The Amazon river is the main river system of the basin and drains water from various tributaries.…”
Section: Introductionmentioning
confidence: 99%
“…Na bacia do rio Purus, o estudo foi realizado em 10 lagos (Fig 1, Tab1) ao longo de 1.440 km nos municípios de Lábrea, Canutama, Tapauá e Beruri (Fig 1). As águas desse rio apresentam valores de pH variando entre 5,3 a 6,7 (Queiroz et al, 2009) e turbidez 34,8 (Silva et al, 2013).…”
Section: Introductionunclassified