Projected ecosystem impact of the Prairie Heating and CO2 Enrichment experiment
Article first published online: 26 MAR 2007
© The Authors (2007). Journal compilation © New Phytologist (2007)
Volume 174, Issue 4, pages 823–834, June 2007
How to Cite
Parton, W. J., Morgan, J. A., Wang, G. and Del Grosso, S. (2007), Projected ecosystem impact of the Prairie Heating and CO2 Enrichment experiment. New Phytologist, 174: 823–834. doi: 10.1111/j.1469-8137.2007.02052.x
- Issue published online: 26 MAR 2007
- Article first published online: 26 MAR 2007
- Received: 30 October 2006 Accepted: 31 January 2007
- carbon dioxide;
- global change;
- • The Prairie Heating and CO2 Enrichment (PHACE) experiment has been initiated at a site in southern Wyoming (USA) to simulate the impact of warming and elevated atmospheric CO2 on ecosystem dynamics for semiarid grassland ecosystems.
- • The daycent ecosystem model was parametrized to simulate the impact of elevated CO2 at the open-top chamber (OTC) experiment in north-eastern Colorado (1996–2001), and was also used to simulate the projected ecosystem impact of the PHACE experiments during the next 10 yr.
- • Model results suggest that soil water content, plant production, soil respiration, and nutrient mineralization will increase for the high-CO2 treatment. Soil water content will decrease for all years, while nitrogen mineralization, soil respiration, and plant production will both decrease and increase under warming depending on yearly differences in water stress. Net primary production (NPP) will be greatest under combined warming and elevated CO2 during wet years.
- • Model results are consistent with empirical field data suggesting that water and nitrogen will be critical drivers of the semiarid grassland response to global change.