Once the forest has been removed and the swamp starts being drained, that organic matter begins to oxidise and give off continuing emissions. It's sort of like the goose that keeps on giving.
My sense is that the most under-appreciated-and perhaps most under-researched-linkages between forests and food security are the roles that forest-based ecosystem services play in underpinning sustainable agricultural production. Forests regulate hydrological services including the quantity, quality, and timing of water available for irrigation. Forest-based bats and bees pollinate crops. Forests mitigate impacts of climate change and extreme weather events at the landscape scale.
Forests and trees make significant direct contributions to the nutrition of poor households ... [as] rural communities in Central Africa obtained a critical portion of protein and fat in their diets through hunting wildlife from in and around forests. The five to six million tonnes of bushmeat eaten yearly in the Congo Basin is roughly equal to the total amount of beef produced annually in Brazil - without the accompanying need to clear huge swathes of forest for cattle.
