• Login
    View Item 
    •   Home
    • Journals and Magazines
    • Society for Range Management Journal Archives
    • Rangeland Ecology & Management / Journal of Range Management
    • Rangeland Ecology & Management, Volume 68 (2015)
    • Rangeland Ecology & Management, Volume 68, Number 5 (September 2015)
    • View Item
    •   Home
    • Journals and Magazines
    • Society for Range Management Journal Archives
    • Rangeland Ecology & Management / Journal of Range Management
    • Rangeland Ecology & Management, Volume 68 (2015)
    • Rangeland Ecology & Management, Volume 68, Number 5 (September 2015)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Simulating Carbon Dioxide Effects on Range Plant Growth and Water Use with GPFARM-Range Model

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Simulating-Carbon-Dioxide-Effe ...
    Size:
    948.2Kb
    Format:
    PDF
    Download
    Author
    Qi, Z.
    Morgan, J. A.
    McMaster, G. S.
    Ahuja, L. R.
    Derner, J. D.
    Issue Date
    2015-09
    Keywords
    biomass
    climate change
    CO2
    evapotranspiration
    rangeland
    soil water
    
    Metadata
    Show full item record
    Citation
    Qi, 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.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/656908
    DOI
    10.1016/j.rama.2015.07.007
    Additional Links
    https://rangelands.org/
    Abstract
    Steadily 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.
    Type
    Article
    text
    Language
    en
    ISSN
    0022-409x
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.rama.2015.07.007
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 68, Number 5 (September 2015)

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.