Exceptionally high levels of hydrogen sulfide (HS) occur at the várzea lakes due to the circulation of the water column, particularly after eutrophication and plant decay. Together with HS, oxygen poor water is displaced from the bottom.
Exceptionally high levels of hydrogen sulfide (HS) occur at the várzea lakes dueto the circulation of the water column, particularly after eutrophication and plant decay.Together with HS, oxygen poor water is displaced from the bottom.