Reich, P B and Hobbie, S E and Ellsworth, D S and et al, . (2006) Nitrogen limitation constrains sustainability of ecosystem response to CO2. Nature, 440. pp. 922-925.
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Abstract
Enhanced plant biomass accumulation in response to elevated atmospheric CO2 concentration could dampen the future rate of increase inCO2 levels and associated climate warming.However, it is unknown whether CO2-induced stimulation of plant growth and biomass accumulation will be sustained or whether limited nitrogen (N) availability constrains greater plant growth in a CO2-enriched world1–9.Here we show, after a six-year field study of perennial grassland species grown under ambient and elevated levels of CO2 and N, that low availability of N progressively suppresses the positive response of plant biomass to elevated CO2. Initially, the stimulation of total plant biomass by elevated CO2 was no greater at enriched than at ambient N supply. After four to six years, however, elevated CO2 stimulated plant biomass much less under ambient than enriched N supply.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Nitrogen, Ecosystems, Co2 |
| Author Affiliation: | Department of Forest Resources, Evolution and Behavior, University of Minnesota, St Paul, Minnesota 55108, USA |
| Subjects: | Atmosperic Science > Climatology |
| Divisions: | General |
| Depositing User: | Mr Siva Shankar |
| Date Deposited: | 11 Apr 2012 11:18 |
| Last Modified: | 11 Apr 2012 11:18 |
| Official URL: | http://dx.doi.org/10.1038/nature04486 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/4659 |
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