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Projected ecosystem impact of the Prairie Heating and CO 2 Enrichment experiment
Author(s) -
Parton William J.,
Morgan Jack A.,
Wang Guiming,
Del Grosso Stephen
Publication year - 2007
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2007.02052.x
Subject(s) - environmental science , primary production , ecosystem , grassland , ecosystem respiration , mineralization (soil science) , soil respiration , terrestrial ecosystem , soil water , global warming , climate change , growing season , grassland ecosystem , atmospheric sciences , hydrology (agriculture) , ecology , soil science , biology , geotechnical engineering , engineering , geology
Summary• The Prairie Heating and CO 2 Enrichment (PHACE) experiment has been initiated at a site in southern Wyoming (USA) to simulate the impact of warming and elevated atmospheric CO 2 on ecosystem dynamics for semiarid grassland ecosystems. • The daycent ecosystem model was parametrized to simulate the impact of elevated CO 2 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‐CO 2 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 CO 2 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.