Journal
ECOLOGY LETTERS
Volume 19, Issue 8, Pages 956-966Publisher
WILEY
DOI: 10.1111/ele.12634
Keywords
Artemisia frigida; Bouteloua gracilis; C-3 grass; C-4 grass; climate change; forb; nitrogen; plant productivity; root biomass; soil moisture
Categories
Funding
- Climate Change, Soils & Emissions Program of the USDA-ARS
- Soil Processes program of the USDA-CSREES [2008-35107-18655]
- Terrestrial Ecosystem Science program of the United States Department of Energy Office of Science [DE-SC0006973]
- Western Regional Center of the National Institute for Climatic Change Research
- National Science Foundation [DEB 1021559]
- ARS [813484, ARS-0424946] Funding Source: Federal RePORTER
- U.S. Department of Energy (DOE) [DE-SC0006973] Funding Source: U.S. Department of Energy (DOE)
Ask authors/readers for more resources
It is unclear how elevated CO2 (eCO(2)) and the corresponding shifts in temperature and precipitation will interact to impact ecosystems over time. During a 7-year experiment in a semi-arid grassland, the response of plant biomass to eCO(2) and warming was largely regulated by interannual precipitation, while the response of plant community composition was more sensitive to experiment duration. The combined effects of eCO(2) and warming on aboveground plant biomass were less positive in wet' growing seasons, but total plant biomass was consistently stimulated by similar to 25% due to unique, supra-additive responses of roots. Independent of precipitation, the combined effects of eCO(2) and warming on C-3 graminoids became increasingly positive and supra-additive over time, reversing an initial shift toward C-4 grasses. Soil resources also responded dynamically and non-additively to eCO(2) and warming, shaping the plant responses. Our results suggest grasslands are poised for drastic changes in function and highlight the need for long-term, factorial experiments.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available