Note: Red marks show locations reported in Hutchison, Manica et al. (2014) where carbon stock or flux data is available; blue marks show locations reported in Jardine and Siikamäki (2014) where soil carbon data is available from meta-analyses by Chmura, Anisfeld et al. (2003), Kristensen, Bouillon et al.( 2008), and Donato, Kauffman et al.(2011).