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dc.contributor.authorAbraha, Michael
dc.contributor.authorGelfand, Ilya
dc.contributor.authorHamilton, Stephen K
dc.contributor.authorShao, Changliang
dc.contributor.authorSu, Yahn-Jauh
dc.contributor.authorRobertson, G Philip
dc.contributor.authorChen, Jiquan
dc.date.accessioned2021-10-06T04:39:38Z
dc.date.available2021-10-06T04:39:38Z
dc.date.issued2016
dc.identifier.issn1432-9840
dc.identifier.doi10.1007/s10021-016-9981-2
dc.identifier.urihttp://hdl.handle.net/10072/408650
dc.description.abstractCarbon and water exchanges between vegetated land surfaces and the atmosphere reveal the ecosystem-scale water-use efficiency (WUE) of primary production. We examined the interacting influence of dominant plant functional groups (C3 and C4) and land-use history on WUEs of annual corn and perennial (restored prairie, switchgrass and smooth brome grass) grasslands in the US Midwest from 2010 through 2013. To this end, we determined ecosystem-level (eWUE) and intrinsic (iWUE) WUEs using eddy covariance and plant carbon isotope ratios, respectively. Corn, switchgrass, and restored prairie were each planted on lands previously managed as grasslands under the USDA Conservation Reserve Program (CRP), or as corn/soybean rotation under conventional agriculture (AGR), while a field of smooth brome grass remained in CRP management. The iWUEs of individual C3 plant species varied little across years. Corn had the highest (4.1) and smooth brome grass the lowest (2.3) overall eWUEs (g C kg−1 H2O) over the 4 years. Corn and switchgrass did not consistently show a significant difference in seasonal eWUE between former CRP and AGR lands, whereas restored prairie had significantly higher seasonal eWUE on former AGR than on former CRP land due to a greater shift from C3 to C4 species on the former AGR land following a drought in 2012. Thus, differences in grassland eWUE were largely determined by the relative dominance of C3 and C4 species within the plant communities. In this humid temperate climate with common short-term and occasional long-term droughts, it is likely that mixed grasslands will become increasingly dominated by C4 grasses over time, with higher yields and eWUE than C3 plants. These results inform models of the interaction between carbon and water cycles in grassland ecosystems under current and future climate and management scenarios.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherSpringer
dc.relation.ispartofpagefrom1001
dc.relation.ispartofpageto1012
dc.relation.ispartofissue6
dc.relation.ispartofjournalEcosystems
dc.relation.ispartofvolume19
dc.subject.fieldofresearchEnvironmental sciences
dc.subject.fieldofresearchBiological sciences
dc.subject.fieldofresearchcode41
dc.subject.fieldofresearchcode31
dc.subject.keywordsScience & Technology
dc.subject.keywordsLife Sciences & Biomedicine
dc.subject.keywordsEcology
dc.subject.keywordsEnvironmental Sciences & Ecology
dc.subject.keywordsecosystem WUE
dc.titleEcosystem water-use efficiency of annual corn and perennial grasslands: Contributions from land-use history and species composition
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationAbraha, M; Gelfand, I; Hamilton, SK; Shao, C; Su, Y-J; Robertson, GP; Chen, J, Ecosystem water-use efficiency of annual corn and perennial grasslands: Contributions from land-use history and species composition, Ecosystems, 2016, 19 (6), pp. 1001-1012
dc.date.updated2021-10-06T04:36:52Z
gro.hasfulltextNo Full Text
gro.griffith.authorHamilton, Stephen K.


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