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ARS Home » Plains Area » Temple, Texas » Grassland Soil and Water Research Laboratory » Research » Publications at this Location » Publication #270394
Title: Resource limitation of ANPP responses to increased CO2 differs among soils

Author
item Fay, Philip
item Polley, Herbert

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 8/1/2011
Publication Date: 9/12/2011
Citation: Fay, P.A., Polley, H.W. 2011. Resource limitation of ANPP responses to increased CO2 differs among soils. In: Proceedings of the International Symposium Grasslands in a Global Context, September 11-14, 2011, Manhattan, Kansas.

Interpretive Summary:

Technical Abstract: Climate change is likely to cause non-linear responses in ecosystem function, because of the complex interactions among multiple resources limiting aboveground net primary production. Using a novel experimental facility for imposing a continuous atmospheric CO2 gradient on three contrasting soil types supporting grassland plant assemblages, we have shown that the potential for future ANPP gains differs among these soils, because of differing combinations of limitation by water or carbon assimilation, in part due to changes in soil water budgets. The potential for primary productivity gains in grasslands due to future increases in atmospheric CO2 will thus vary across the landscape.