Assessing the carbon dioxide balance of a degraded tropical peat swamp forest following multiple fire events of different intensities

Tropical peat swamp forest is a unique ecosystem rich in carbon and water, accumulating huge amount of as peat. However, the pool has been threatened by oxidative decomposition fire loss mainly because deforestation drainage. Fire causes acute dioxide (CO2) emissions through combustion biomass Also, should change CO2 balance postfire ecosystems. Although it crucial to quantify even after event understand total impact, information based on field measurement lacking. Thus, we had measured eddy flux above repeatedly burned degraded for about 13 years since 2004. The site was stable source 147?290 g C m?2 yr?1 five stand-replacing 2002. Unexpectedly, moderate-severity 2009 changed sink ?600 yr?1. drastic would have caused large decrease plant debris, which accumulated 2002 but fire. In contrast, gross primary production (GPP) remained same though vegetation damaged, year-round wet conditions La Niña promoted regrowth hygrophilous herbaceous plants were favorable their GPP. also low-severity drained 2014 did not return source. net uptake insufficient recover emission. If from four fires 1999, 2002, are counted, expected owe an outstanding debt 25 kg m?2.