dc.contributor.author |
Bernal, Blanca |
en |
dc.contributor.author |
Anderson, Christopher J. |
en |
dc.contributor.author |
Mitsch, William J. |
en |
dc.date.accessioned |
2016-06-02T14:46:56Z |
|
dc.date.available |
2016-06-02T14:46:56Z |
|
dc.date.issued |
2017 |
|
dc.identifier.citation |
Bernal, Blanca, Anderson, Christopher J., and Mitsch, William J. 2017. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F28732">Nitrogen Dynamics in Two Created Riparian Wetlands over Space and Time</a>." <em>Journal of Hydrologic Engineering</em>. 22 (1):<a href="https://doi.org/10.1061/(ASCE)HE.1943-5584.0001397">https://doi.org/10.1061/(ASCE)HE.1943-5584.0001397</a> |
en |
dc.identifier.issn |
1084-0699 |
|
dc.identifier.uri |
https://hdl.handle.net/10088/28732 |
|
dc.description.abstract |
AbstractTemporal and spatial variations of nitrogen (N) soil storages and fluxes were examined at two 1-ha created riverine wetlands in the U.S. Midwest. Soil N content (total N, organic-N, NO3-N, and NH4-N), N accumulation rates, and soil C:N ratios were compared between the two wetlands constructed 15 years earlier (one was planted and the other left to naturally colonize). Differences in wetland soil N content and accumulation were also examined in relation to proximity of river input and relative to a range of topographic features related to wetland water depth. The planted and naturally colonized wetlands showed similar rates of N accumulation. However, differences were detected related to the content of mineralized forms of N (NO3-N and NH4-N) that may relate to the history of vegetation communities at these wetlands. Significant spatial variation of N accumulation was detected within the wetlands, with the highest rates found in the deeper open water communities compared to shallow emergent marsh/edge vegetation communities (23.5±2.0 versus 17.3±1.3/18.2±1.4 g N m-2 y-1). Nitrogen budgets comparing two ages of the wetlands illustrate higher N accumulation rates (by 19%), higher N reduction in the surface water (47 to 52% reduction), and increased denitrification rates (by 13%) from year 10 to year 15. We also found out that nitrogen accumulation in the soil was 7.1 to 7.5% higher than were denitrification rates in these young wetlands. We discuss the importance of efforts such as this to support better understanding of N pathways in both created and natural wetlands, while providing critical data needed to improve modelling efforts and assess the long-term effectiveness of wetlands for improving water quality. |
en |
dc.relation.ispartof |
Journal of Hydrologic Engineering |
en |
dc.title |
Nitrogen Dynamics in Two Created Riparian Wetlands over Space and Time |
en |
dc.type |
Journal Article |
en |
dc.identifier.srbnumber |
139536 |
|
dc.identifier.doi |
10.1061/(ASCE)HE.1943-5584.0001397 |
|
rft.jtitle |
Journal of Hydrologic Engineering |
|
rft.volume |
22 |
|
rft.issue |
1 |
|
dc.description.SIUnit |
SERC |
en |
dc.description.SIUnit |
Peer-reviewed |
en |