Spatial and temporal changes to a hydrologically-reconnected coastal wetland: implications for restoration

Simple item page
dc.contributor.authorSpera, Alina C.
dc.contributor.authorWhite, John R.
dc.contributor.authorCorstanje, Ronald
dc.date.accessioned2020-04-01T15:10:30Z
dc.date.available2020-04-01T15:10:30Z
dc.date.issued2020-03-23
dc.description.abstractMississippi River Delta wetlands were isolated from river influence due to levee construction beginning in the early 1900's. Surface water diversions were primarily designed to manage salinity and maintain marsh vegetation by reintroducing Mississippi River water and nutrients into adjacent wetlands. Phosphorus (P) is a major limiting nutrient that can control productivity, but in excess can contribute to wetland eutrophic conditions and water quality degradation. Most wetland soil characterization assessments consider soil total P, however, this parameter alone cannot describe P bioavailability due to differences in organic and inorganic forms. A soil characterization of the Davis Pond diversion was done in 2007, before full-scale operation began, and in 2018 after 11 years of river loading. The top 10 cm of soil from 140 stations each year were analyzed for physiochemical properties and both organic and inorganic P forms. Mineral content is used to delineate areas of river diversion influence and compare P stocks between hydrologically isolated marsh areas and where effective river diversion reconnection took place. The river diversion resulted in a nearly 100% increase in soil mineral content and 58% increase in bulk density. The dominant source of soil P has changed from organic P to inorganic P in 29% of the wetland area, significantly associated with mineral content of the soil. Inorganic P stocks in diversion influenced areas are 9 times higher than those which remained isolated from riverine materials. The study demonstrates that long-term addition of mineral sediments and inorganic P did not lead to deleterious effects in the wetland soil. This is the first study in the Mississippi River delta to spatially track river reconnection driven wetland P dynamics and can provide valuable information for predictive models for sediment diversions for coastal restoration.en_UK
dc.identifier.citationSpera AC, White JR, Corstanje R. (2020) Spatial and temporal changes to a hydrologically-reconnected coastal wetland: implications for restoration. Estuarine, Coastal and Shelf Science, Volume 238, June 2020, Article number 106728en_UK
dc.identifier.issn0272-7714
dc.identifier.urihttps://doi.org/10.1016/j.ecss.2020.106728
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15356
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleSpatial and temporal changes to a hydrologically-reconnected coastal wetland: implications for restorationen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Spatial_and_temporal_changes_to_a_hydrologically-reconnected_coastal_wetland-2020.pdf
Size:
2.06 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SWEE)