NDLI: Nutrient baselines of Cerrado low-order streams: comparing natural and impacted sites in Central Brazil

Content Provider	Springer Nature Link
Author	Fonseca, Bárbara Medeiros Mendonça Galvão, Luciana Padovesi Fonseca, Claudia Abreu, Lucijane Monteiro Fernandes, Adriana Cristina Marinho
Copyright Year	2013
Abstract	The aquatic systems responsible for water supply in the Brazilian Federal District (FD) have been threatened by anthropogenic pressures, especially considering the expressive demographic increase in the region during the last decades. The purposes of this research were: (a) to assess the water quality in streams located in the FD by monitoring physical–chemical variables; (b) to define baselines for these variables among different ecological status categories. The 14 investigated streams were sampled between 2006 and 2009, in the dry (August–September, 2006, 2008, 2009) and rainy (March–April, 2008, 2009) seasons. All sampling sites were classified in four categories (“very impacted”, “impacted”, “in transition” and “natural”) using an adaptation of a rapid habitat assessment protocol. Differences in water quality among sites were generally well predicted in the four ecological status categories defined by the protocol, which showed a gradient in nutrient concentrations from reference sites classified as “natural” (medians: electrical conductivity = 7.3 μS cm−1; nitrate = 0.040 mg L−1; ammonium = 0.039 mg L−1; soluble reactive phosphorus (SRP) = <0.001 mg L−1; total phosphorus (TP) = 0.006 mg L−1; ) to those classified as “very impacted” (medians: electrical conductivity = 87.7 μS cm−1; nitrate = 0.247 mg L−1; ammonium = 0.219 mg L−1; SRP = 0.010 mg L−1; TP = 0.035 mg L−1). Point sources inputs were the main factor for water quality deterioration. The nutrient baselines reported were relatively low when compared to data collected from reference areas in Brazil (e.g., São Paulo State) or temperate regions, especially for TP.
Starting Page	19
Ending Page	33
Page Count	15
File Format	PDF
ISSN	01676369
Journal	Environmental Monitoring and Assessment
Volume Number	186
Issue Number	1
e-ISSN	15732959
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-07-26
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Monitoring Nutrients Reference conditions Savanna Tropical limnology Environmental Monitoring/Analysis Environmental Management Ecotoxicology Atmospheric Protection/Air Quality Control/Air Pollution Ecology
Content Type	Text
Resource Type	Article
Subject	Pollution Medicine Management, Monitoring, Policy and Law

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