Título:	Water quality and land use impacts in a Brazilian conservation unit with speleological heritage.
Autoria:	MUNIZ, D. H. de F. SILVA, S. N. F. da BORGES, S. R. CORDOVIL, A. A. FARIA, J. P. P. ROCHA, R. M. da CRUVINEL, V. R. N OLIVEIRA FILHO, E. C. de PASSOS, C. J. S.
Afiliação:	DAPHNE HELOISA DE FREITAS MUNIZ, CPAC; SAMILA NERES FARIAS DA SILVA, UNIVERSIDADE DE BRASÍLIA; SANDRO RAPHAEL BORGES, INSTITUTO CHICO MENDES DE CONSERVAÇÃO DA BIODIVERSIDADE; ANANDA ANDRADE CORDOVIL, UNIVERSIDADE DE BRASÍLIA; JOÃO PEDRO PINHEIRO FARIA, UNIVERSIDADE DE BRASÍLIA; RODRIGO MARQUES DA ROCHA, UNIVERSIDADE DE BRASÍLIA; VANESSA RESENDE NOGUEIRA CRUVINEL, UNIVERSIDADE DE BRASÍLIA; EDUARDO CYRINO DE OLIVEIRA FILHO, CPAC; CARLOS JOSÉ SOUSA PASSOS, UNIVERSIDADE DE BRASÍLIA.
Ano de publicação:	2026
Referência:	Water, v. 18, n. 7, article 799, March 2026.
Conteúdo:	Abstract: Karst water systems are highly vulnerable to land use pressures, requiring integrated assessments to support conservation and management. This study evaluated the physicochemical, microbiological, and pesticide-related water quality in the Environmental Protection Area Nascentes do Rio Vermelho (APANRV), a karst conservation unit in the Brazilian Cerrado. Sixteen sampling sites (rivers, springs, and cave waters) were monitored during the dry (May 2024) and rainy (October 2024) seasons. Analyses included nutrients, major ions, Escherichia coli, and a broad spectrum of pesticides. The results showed marked spatial and seasonal variability, with elevated hardness and conductivity in karst areas due to carbonate dissolution. Nitrate and total phosphorus reached peak values of 13.59 and 0.132 mg L−1, respectively, indicating localized nutrient enrichment. E. coli concentrations reached ≥2419.6 MPN 100 mL−1, exceeding regulatory limits, particularly during the rainy season at recreational cave sites. Pesticides were detected in both seasons, with 11 compounds in the dry season and 8 in the rainy season, including atrazine degradation products, and maximum quantified concentrations up to 1.8 µg L−1 (acephate). These findings highlight the combined influence of geology, seasonality, and land use on karst water quality and reinforce the need for continuous monitoring and targeted management strategies.
Thesagro:	Águas Superficiais Qualidade da Água Pesticida Uso da Terra
NAL Thesaurus:	Karsts Surface water Water quality Pesticides Land use
Digital Object Identifier:	https://doi.org/10.3390/w18070799
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAC)