Publication Date:
2001-12-26
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rojstaczer, S -- Sterling, S M -- Moore, N J -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2549-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Hydrologic Science and Division of Earth and Ocean Sciences, Duke University, Durham, NC 27708, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752576" target="_blank"〉PubMed〈/a〉
Keywords:
*Agriculture
;
Biomass
;
Computer Simulation
;
Conservation of Natural Resources
;
*Ecosystem
;
Food
;
*Forestry
;
Fresh Water
;
*Human Activities
;
Humans
;
Monte Carlo Method
;
Photosynthesis
;
Plant Development
;
*Plants/metabolism
;
Probability
;
Trees
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
