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dc.contributor.authorQi, Z.
dc.contributor.authorMorgan, J. A.
dc.contributor.authorMcMaster, G. S.
dc.contributor.authorAhuja, L. R.
dc.contributor.authorDerner, J. D.
dc.date.accessioned2021-03-08T18:36:48Z
dc.date.available2021-03-08T18:36:48Z
dc.date.issued2015-09
dc.identifier.citationQi, Z., Morgan, J. A., McMaster, G. S., Ahuja, L. R., & Derner, J. D. (2015). Simulating Carbon Dioxide Effects on Range Plant Growth and Water Use with GPFARM-Range Model. Rangeland Ecology & Management, 68(5), 423–431.
dc.identifier.issn0022-409x
dc.identifier.doi10.1016/j.rama.2015.07.007
dc.identifier.urihttp://hdl.handle.net/10150/656908
dc.description.abstractSteadily rising carbon dioxide (CO2) in the Earth's atmosphere has the potential to increase plant biomass production and reduce plant transpiration in semiarid rangelands. Incorporating results from field CO2-enrichment experiments into process-based simulation models enhances our ability to project climate change impacts on these rangelands. In this study, we added algorithms for computing changes in plant biomass growth and stomatal resistance under elevated [CO2] to the GPFARM-Range (Great Plains Framework for Agricultural Resource Management in Rangelands) model, a newly developed stand-alone software package for rangeland management. The GPFARM-Range model was tested against 5 yr (1997-2001) of soil water and plant biomass data from CO2-enrichment (720 ppm) field experiments conducted in shortgrass steppe in northern Colorado. Simulated results for both peak standing crop biomass and soil water for both ambient and elevated [CO2] treatments had a percent bias within ± 10%, Nash-Sutcliffe efficiency ≥ 0.5, and index of agreement > 0.70. The model also captured the observed trend of increased C3 grass biomass and reduced plant transpiration under elevated [CO2]. The model was used to evaluate the separate effectiveness of elevated [CO2] on plant growth rate (C3 grasses only) and stomatal resistance (both C3 and C4 grasses). Two separate simulations showed that increased growth rate and stomatal resistance due to elevated [CO2] enhanced total plant biomass gain (C3 + C4) by 22% and 17%, respectively. The results indicate the algorithms used to simulate the impacts of elevated [CO2] on range plant growth and water use are reliable and can be used to evaluate rangeland production for predicted increases in [CO2], However, further studies are necessary because the reduction in plant transpiration under elevated [CO2] was underestimated, and increase in nitrogen use efficiency due to elevated [CO2] is not included. © 2015 Society for Range Management.
dc.language.isoen
dc.publisherSociety for Range Management
dc.relation.urlhttps://rangelands.org/
dc.rightsCopyright © Society for Range Management.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectbiomass
dc.subjectclimate change
dc.subjectCO2
dc.subjectevapotranspiration
dc.subjectrangeland
dc.subjectsoil water
dc.titleSimulating Carbon Dioxide Effects on Range Plant Growth and Water Use with GPFARM-Range Model
dc.typeArticle
dc.typetext
dc.identifier.journalRangeland Ecology & Management
dc.description.collectioninformationThe Rangeland Ecology & Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.source.journaltitleRangeland Ecology & Management
dc.source.volume68
dc.source.issue5
dc.source.beginpage423
dc.source.endpage431
refterms.dateFOA2021-03-08T18:36:48Z


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