Publication details.


Author(s):V. Saderne, N.R. Geraldi, P.I. Macreadie, D.T. Maher, J.J. Middelburg, O. Serrano, H. Almahasheer, A. Arias-Ortiz, M. Cusack, B.D. Eyre, J.W. Fourqurean, H. Kennedy, D. Krause-Jensen, T. Kuwae, P.S. Lavery, C.E. Lovelock, N. Marba, P. Masqué, M.A. Mateo, I. Mazarrasa, K.J. McGlathery, M.P.J. Oreska, C.J. Sanders, I.R. Santos, J.M. Smoak, T. Tanaya, K. Watanabe, C.M. Duarte
Title:Role of carbonate burial in Blue Carbon budgets
Journal:Nature Communications
JCR Impact Factor:12.121
Issue No.:1
Abstract:Calcium carbonates (CaCO ) often accumulate in mangrove and seagrass sediments. As CaCO production emits CO , there is concern that this may partially offset the role of Blue Carbon ecosystems as CO sinks through the burial of organic carbon (C ). A global collection of data on inorganic carbon burial rates (C , 12% of CaCO mass) revealed global rates of 0.8 TgC yr and 15–62 TgC yr in mangrove and seagrass ecosystems, respectively. In seagrass, CaCO burial may correspond to an offset of 30% of the net CO sequestration. However, a mass balance assessment highlights that the C burial is mainly supported by inputs from adjacent ecosystems rather than by local calcification, and that Blue Carbon ecosystems are sites of net CaCO dissolution. Hence, CaCO burial in Blue Carbon ecosystems contribute to seabed elevation and therefore buffers sea-level rise, without undermining their role as CO sinks.

Related staff

  • Nuria Marbà Bordalba
  • Related departments

  • Oceanography and Global Change
  • Related research groups

  • Global Change Research