Litter carbon on Plant Functional Types (PFTs) (kg C / m2 / year) 1515 Litter carbon on Plant Functional Types (PFTs) (kg C / m2 / year) Litter carbon on Plant Functional Types (PFTs) (kg C / m2 / year) Litter carbon on Plant Functional Types (PFTs) (kg C / m2 / year)