Allochthonous organic carbon rivers

Allochthonous inputs from the Amazon River and local drainage thus contribute 4.3 Tg yr of organic carbon to floodplain. This represents approximately 4% of total plant production within the floodplain. However, the majority of the allochthonous inputs are refractory carbon, while most of the aquatic plant production is available to other trophic levels. 

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