The Agusan Marsh: a brief history -- The Agusan Marsh: a situationer with focus on scientific aspects -- Indicators and possible driving mechanisms of shifts in the position of Agusan River along the Butuan coastal plain -- Hydrology and ecology-related aspects of managing the Agusan Marsh -- Mercury pollution: a threat to Agusan Marsh -- Species richness, abundance and distribution of aquatic insects of Agusan Marsh, Mindanao, Philippines -- Distribution of the avifauna of Agusan Marsh, Agusan del Sur, Philippines -- Inventory of aquatic fauna of Agusan Marsh with notes on introduced species and their potential impacts on biodiversity -- Social and economi aspects of the Agusan Marsh key biodiversity area -- Socio-economic initiatives of local governments and nongovernmental organizations in Agusan Marsh -- The Agusan Marsh FOCAS: small grant facility for Agusan Marsh development.