Nitrate on a Slow Decline: Watershed Water Quality Response during Two Decades of Tallgrass Prairie Ecosystem Reconstruction in Iowa

dc.contributor.author Tomer, Mark
dc.contributor.author Schilling, Keith
dc.contributor.author Cole, Kevin
dc.contributor.department College of Agriculture and Life Sciences
dc.contributor.other Iowa Nutrient Research Center
dc.date 2021-06-10T21:27:35.000
dc.date.accessioned 2021-08-14T17:15:10Z
dc.date.available 2021-08-14T17:15:10Z
dc.date.embargo 2021-06-10
dc.date.issued 2019-03-21
dc.description.abstract <p>The Neal Smith National Wildlife Refuge was established as a tallgrass prairie ecosystem reconstruction in the Walnut Creek watershed (5238 ha), Jasper County, Iowa, with >1200 ha of prairie plantings initiated between 1993 and 2006. This study updates the documented decreases in watershed NO3–N losses that accompanied this change in land cover to a 20-yr record. Annual flow-weighted NO3–N concentrations declined by 0.15 mg NO3–N L−1 yr−1, which was not significantly different from the rate of 0.07 mg NO3–N L−1 yr−1 reported after the first decade of monitoring. There was also evidence (<em>p</em> < 0.1) that prairie reconstruction led to a declining trend in annual watershed water yield, which would have contributed to the trend of decreasing NO3–N loads. However, variability in climate, including 2 yr with significant flooding events followed by a major drought during the second decade of monitoring, challenged any notion that a watershed water quality record will stabilize even >10 yr after a substantial change in land cover, in this naturally drained watershed underlain by fine grained glacial deposits that exhibit multidecadal groundwater transport times. Efforts to document progress toward water quality goals will need to consider dominant flow paths and associated travel times, uncertainty in the effectiveness of management changes, and a changeable climate.</p>
dc.description.comments <p>This is an article published as Tomer, Mark D., Keith E. Schilling, and Kevin J. Cole. "Nitrate on a Slow Decline: Watershed Water Quality Response during Two Decades of Tallgrass Prairie Ecosystem Reconstruction in Iowa." <em>Journal of environmental quality</em> 48, no. 3 (2019): 579-585. Posted with permission of INRC.<br /><br />Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/inrc_pubs/1/
dc.identifier.articleid 1001
dc.identifier.contextkey 23296940
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath inrc_pubs/1
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/5w5pyxYz
dc.source.bitstream archive/lib.dr.iastate.edu/inrc_pubs/1/jeq2018.07.0258.pdf|||Fri Jan 14 18:03:27 UTC 2022
dc.subject.disciplines Environmental Indicators and Impact Assessment
dc.subject.disciplines Environmental Monitoring
dc.title Nitrate on a Slow Decline: Watershed Water Quality Response during Two Decades of Tallgrass Prairie Ecosystem Reconstruction in Iowa
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isOrgUnitOfPublication e44dc340-9307-4a82-94df-675596522788
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