Tropical lowland forest in Barro Colorado Island in Panama (IMAGE)

Cary Institute of Ecosystem Studies

Tropical lowland forest in Barro Colorado Island in Panama

Caption

Tropical forests are an important carbon sink. Their ability to sequester carbon in the future is in question because their growth may be limited by nitrogen. Nitrogen-fixing trees could provide the nitrogen needed to support the sink, unless constraints like herbivory are strong.

Credit

Sarah Batterman

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