Variability in partial pressure of CO2 in eutrophic lake, Lake Tega

Abstract

The observation of partial pressure of CO₂ in the surface water of Lake Tega was conducted throughout year to evaluate whether the lake act as atmospheric CO₂ sink.
The partial pressure of CO₂ ranged between 430 and 14,000 μatm and was highly oversaturated with respect to the atmospheric CO₂. That is to say Lake Tega is a source of atmospheric CO₂. Based on the budger of dissolved inorganic carbon in the water of Lake Tega, inorganic carbon used for higher primary productivity\(4,800MgC/year\)were supplied from biological remineralization of organic matter\(2,600MgC/year\), riverine inflow\(2,200MgC/year\)and sediment\(1,900MgC/year\).