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Relation between limnological variables (abiotic and biotic) and seasonality in CH4 and CO2 gas fluxes in the fluvial regions of the Billings and Guarapiranga dams (São Paulo - SP)

Abstract

Understanding the functioning of flooded areas has become a challenge for the scientific community due to the diversity of this environments - that can be classified as representative of these ecosystems (e.g.: marshes, swamps, shallow lakes, flood plains) -, the great variability of hydrological conditions - that represent the extent and heterogeneity of their geographical distribution - and features that influence not only their ecological functions, but also their uses, which are also determined by local economic activities. Among the many ecological functions attributed to flooded areas are: flood dampening; recharge of aquifers; reduction of pollution loads; attenuation of sediment loads; and carbon holding and storage. Based on the recognition of these numerous ecological functions and their importance for the carbon cycle, this research project has as its central objective on evaluating the relationship between the limnological variables, the seasonality and the main biochemical mechanisms that influence the fluxes of CH4 and CO2 gases in flooded areas located in the fluvial region of the Billings and Guarapiranga Reservoirs (SP), submitted to different tributary loads. In addition, it is intended to create a computational mathematical model based on the carbon balance to estimate the emission of greenhouse gases in flooded areas to evaluate under what conditions these areas are a source and/or a sink of carbon. For this purpose, physical, chemical and biological analyzes will be carried out in different compartments (air, water and sediment) at different periods of the year to quantify the allochthonous and autochthonous carbon loads, as well as to identify the biological and physicochemical processes that rule the greenhouse gas emissions in flooded areas submitted to high and low levels of pollutants loads. The results obtained in this research will permit the comprehension of these processes, as well as their relationship with hydrological, climatological and limnological variables of the basins, becoming a strategic issue both to understand their operation and to propose actions that reduce the emission of greenhouse gases. Another study of great importance of the project is in the design of the mass balance model of the carbon cycle to be developed for the flooded areas of the fluvial regions. These results will identify the different carbon pathways in these ecosystems and assess under which loading conditions the flooded areas of the river basin of the reservoirs behave as a carbon source or sink and if the organic matter that generates the greenhouse gases Is allochthonous or autochthonous. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
FONSECA PIERANGELI, GABRIELLE MARIA; RAGIO, RODRIGO ALMERIA; BENASSI, ROSELI FREDERIGI; GREGORACCI, GUSTAVO BUENO; SUBTIL, EDUARDO LUCAS. Pollutant removal, electricity generation and microbial community in an electrochemical membrane bioreactor during co-treatment of sewage and landfill leachate. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, v. 9, n. 5 OCT 2021. Web of Science Citations: 0.
BENASSI, ROSELI FREDERIGI; DE JESUS, TATIANE ARAUJO; GOMES COELHO, LUCIA HELENA; HANISCH, WERNER SIEGFRIED; DOMINGUES, MERCIA REGINA; TANIWAKI, RICARDO HIDEO; GOYA PEDUTO, THAIS ARAUJO; DA COSTA, DANILO OLIVEIRA; MARTINS POMPEO, MARCELO LUIZ; MITSCH, WILLIAM J. Eutrophication effects on CH4 and CO2 fluxes in a highly urbanized tropical reservoir (Southeast, Brazil). Environmental Science and Pollution Research, v. 28, n. 31, p. 42261-42274, AUG 2021. Web of Science Citations: 0.
BENASSI, ROSELI FREDERIGI; DE JESUS, TATIANE ARAUJO; GOMES COELHO, LUCIA HELENA; HANISCH, WERNER SIEGFRIED; DOMINGUES, MERCIA REGINA; TANIWAKI, RICARDO HIDEO; GOYA PEDUTO, THAIS ARAUJO; DA COSTA, DANILO OLIVEIRA; MARTINS POMPEO, MARCELO LUIZ; MITSCH, WILLIAM J. Eutrophication effects on CH4 and CO2 fluxes in a highly urbanized tropical reservoir (Southeast, Brazil). Environmental Science and Pollution Research, APR 2021. Web of Science Citations: 0.
PIERANGELI, GABRIELLE MARIA FONSECA; DOMINGUES, MERCIA REGINA; DE JESUS, TATIANE ARAUJO; COELHO, LUCIA HELENA GOMES; HANISCH, WERNER SIEGFRIED; POMPEO, MARCELO LUIZ MARTINS; SAIA, FLAVIA TALARICO; GREGORACCI, GUSTAVO BUENO; BENASSI, ROSELI FREDERIGI. Higher Abundance of Sediment Methanogens and Methanotrophs Do Not Predict the Atmospheric Methane and Carbon Dioxide Flows in Eutrophic Tropical Freshwater Reservoirs. FRONTIERS IN MICROBIOLOGY, v. 12, MAR 17 2021. Web of Science Citations: 0.
GOYA PEDUTO, THAIS DE ARAUJO; DE JESUS, TATIANE ARAUJO; GOMES COELHO, LUCIA HELENA; HANISCH, WERNER SIEGFRIED; DOMINGUES MORETTO, MERCIA REGINA; BENASSI, ROSELI FREDERIGI. Phytotoxicological assessment and its relationship with environmental variables of Rio Grande Reservoir waters (Sao Paulo State, Brazil). REVISTA ELETRONICA EM GESTAO EDUCACAO E TECNOLOGIA AMBIENTAL, v. 24, 2020. Web of Science Citations: 0.

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