Biogenic gases in tropical floodplain river

Brazilian Archives of Biology and Technology

Maria Victória Ramos Ballester²  José Eduardo Dos Santos¹ 

[1],Universidade de São Paulo Centro de Energia Nuclear na Agricultura Piracicaba São Paulo ,Brazil

关键词: Biogenic gases;    methanogenesis;    aerobic respiration;    CO2 production;   

DOI  :  10.1590/S1516-89132001000200006

来源: SciELO

【 摘 要 】

Analysis of the distribution of biogenic gases in the floodplain of the Mogi-Guaçu River (São Paulo, Brazil) enabled the establishment of a "redox hierarchy", in which the main channel was the most oxidizing environment, followed by Diogo Lake, with Infernão Lake having the most reducing conditions of the subsystems evaluated. Diogo Lake exported about 853.4 g C.m-2.year-1, of which, 14.6% was generated from methanogenesis and 36.7% by aerobic respiration. For Infernão Lake, these values were 2016 g C.m-2.year-1, 1.8 % and 41.5 %, respectively. Carbon export by these systems was predominantly in the form of CO2, which was responsible for the release of 728.78 g C.m-2.year-1 at Diogo Lake and 1979.72 g C.m-2. year-1 at Infernão Lake. Such patterns may result from the nature of the hydrological conditions, the action of the hydroperiod, and morphological characteristics of the environment.

【 授权许可】

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