Human Appropriation of Photosynthesis Products

Details Human Appropriation of Photosynthesis Products Human Appropriation of Photosynthesis Products

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001sci...294.2549r&link_type=abstract

Science, Volume 294, Issue 5551, pp. 2549-2552 (2001).

Physics

13

Scientific paper

Previous global estimates of the human impact on terrestrial photosynthesis products depended heavily on extrapolation from plot-scale measurements. Here, we estimated this impact with the use of recent data, many of which were collected at global and continental scales. Monte Carlo techniques that incorporate known and estimated error in our parameters provided estimates of uncertainty. We estimate that humans appropriate 10 to 55% of terrestrial photosynthesis products. This broad range reflects uncertainty in key parameters and makes it difficult to ascertain whether we are approaching crisis levels in our use of the planet's resources. Improved estimates will require high-resolution global measures within agricultural lands and tropical forests.

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