Eutrophication effects on CH 4 and CO 2 fluxes in a highly urbanized tropical reservoir (Southeast, Brazil).

Autor: Benassi RF; Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Av. dos Estados, 5001 - Bangú, SP, 09210-580, Santo André, Brazil. roseli.benassi@ufabc.edu.br., de Jesus TA; Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Av. dos Estados, 5001 - Bangú, SP, 09210-580, Santo André, Brazil., Coelho LHG; Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Av. dos Estados, 5001 - Bangú, SP, 09210-580, Santo André, Brazil., Hanisch WS; Department of Chemical Engineering, Universidade Federal de São Paulo, São Paulo, Brazil., Domingues MR; Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Av. dos Estados, 5001 - Bangú, SP, 09210-580, Santo André, Brazil., Taniwaki RH; Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Av. dos Estados, 5001 - Bangú, SP, 09210-580, Santo André, Brazil., Peduto TAG; Post-graduation Program in Environmental Science and Technology, Federal University of ABC, CTA/UFABC, Av. dos Estados, 5001 - Bangú, Santo André, SP, 09210-580, Brazil., da Costa DO; Post-graduation Program in Environmental Science and Technology, Federal University of ABC, CTA/UFABC, Av. dos Estados, 5001 - Bangú, Santo André, SP, 09210-580, Brazil., Pompêo MLM; Department of Ecology, Institute of Biosciences, University of Sao Paulo Rua do Matão, Trav. 14, n° 321, PO Box 05508-900, São Paulo, SP, Brazil.; Post-graduation Program in Environmental Sciences, UNESP, Campus de Sorocaba, Sorocaba, Brazil., Mitsch WJ; Everglades Wetland Research Park, FGCU, Naples, FL, USA.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2021 Aug; Vol. 28 (31), pp. 42261-42274. Date of Electronic Publication: 2021 Apr 02.
DOI: 10.1007/s11356-021-13573-7
Abstrakt: Shallow urban polluted reservoirs at tropical regions can be hotspots for CO 2 and CH 4 emissions. In this study, we investigated the relationships between eutrophication and GHG emissions in a highly urbanized tropical reservoir in São Paulo Metropolitan Area (Brazil). CO 2 and CH 4 fluxes and limnological variables (water and sediment) were collected at three sampling stations classified as hypereutrophic and eutrophic. Analysis of variance (ANOVA) and the principal component analysis (PCA) determined the most significant parameters to CO 2 and CH 4 fluxes. ANOVA showed significant differences of CO 2 and CH 4 fluxes between sampling stations with different trophic state. The hypereutrophic station showed higher mean fluxes for both CO 2 and CH 4 (5.43 ± 1.04 and 0.325 ± 0.167 g m -2 d -1 , respectively) than the eutrophic stations (3.36 ± 0.54 and 0.060 ± 0.005 g m -2 d -1 ). The PCA showed a strong relationship between nutrients in the water column (surface and bottom) and GHG fluxes. We concluded that GHG fluxes were higher whenever the trophic state increases as observed previously in temperate and tropical reservoirs. High concentrations of nutrients in the water column in the studied area support the high production of autotrophic biomass that, when sedimented, ends up serving as organic matter for CH 4 producers. These outcomes reinforce the necessity of water quality improvement and eutrophication mitigation in highly urbanized reservoirs in tropical regions.
(© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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