C.E.G.R. Schaefer E.S. Mendonca I.R. Silva R.M. Santana A.S.S. Ribeiro F.N.B. Simas 2007 Recent works show that organic matter accumulation in some soils from coastal Antarctica is higher than previously expected. The objective of the present work was to estimate the organic C stocks for soils from maritime Antarctica. Cryosols from subpolar desert landscapes presented the lowest organic C stocks. Ornithogenic soils are the most important C reservoirs in terrestrial ecosystems in this part of Antarctica. Although these soils correspond to only 2.5 % of the ice-free areas at Admiralty Bay, they contain approximately 20 % of the estimated C stock. Most of the organic C in the studied soils is stored in the active layer but in some cases the C is also stored in the permafrost. application/pdf 10.3133/ofr20071047SRP076 en U.S Geological Survey Organic carbon stocks in permafrost-affected soils from Admiralty Bay, Antarctica reports