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OAS accession Detail for 0209238
| << previous | |revision: 8 |
| accessions_id: | 0209238 | archive |
|---|---|
| Title: | Saltmarsh carbon and nitrogen cycling nutrient data in two northern Gulf of Mexico saltmarsh plants from 2017-2018 (NCEI Accession 0209238) |
| Abstract: | This dataset contains salt marsh nutrient data to determine the biogeochemical impact of elevated nutrient loading on ecosystem carbon dynamics and nitrate reduction pathways (denitrification and dissimilatory nitrate reduction to ammonium (DNRA)) in plots dominated by either Juncus roemerianus or Spartina alterniflora that were collocated in a northern Gulf of Mexico salt marsh. The nutrients measured in this dataset include saltmarsh denitrification potential, anaerobic ammonium oxidation (anammox) potential, porewater nutrient concentrations, gross primary productivity, ecosystem respiration, and others. This data is available in .csv format. |
| Date received: | 20200207 |
| Start date: | 20170407 |
| End date: | 20180720 |
| Seanames: | Coastal Waters of Alabama, Gulf of Mexico |
| West boundary: | -88.12407 |
| East boundary: | -88.123611 |
| North boundary: | 30.257097 |
| South boundary: | 30.256717 |
| Observation types: | in situ, laboratory analyses |
| Instrument types: | fluorometer, spectrophotometer |
| Datatypes: | CHEMISTRY - SEDIMENT, CHLOROPHYLL A, NITROGEN, SEDIMENT - POREWATER CHEMISTRY, SEDIMENTS - TOTAL CARBON |
| Submitter: | Ledford, PhD Taylor |
| Submitting institution: | University of Alabama |
| Collecting institutions: | University of Alabama |
| Contributing projects: | |
| Platforms: | |
| Number of observations: | |
| Supplementary information: | Salt marsh biogeochemical processes are regulated by ecosystem structure (e.g. plant community composition). However, plant-specific responses to stressors such as elevated nutrient inputs can have differing impacts on nitrogen (N) removal and carbon (C) sequestration. We conducted a field manipulation to investigate the impact of elevated nutrient loading on ecosystem C dynamics and nitrate reduction pathways (denitrification and dissimilatory nitrate reduction to ammonium (DNRA)) in plots dominated by either Juncus roemerianus or Spartina alterniflora that were collocated in a northern Gulf of Mexico salt marsh. We increased N and phosphorus (P) inputs by two- and three-times current levels in the region. Nutrient enrichment had no effect on net ecosystem exchange. However, a three-fold increase in nutrient input resulted in nearly one-third increases in gross primary productivity (GPP) and ecosystem respiration in S. alterniflora plots, whereas there was no impact in J. roemerianus plots. Denitrification increased in S. alterniflora plots 10-fold at both treatment levels relative to controls, but as with GPP, there was no response in J. roemerianus plots to higher nutrient inputs. In contrast, a three-fold increase in nutrients reduced DNRA by half in J. roemerianus plots. This work demonstrates that plant species-specific responses in marshes need to be considered for determining the impact of higher nutrient inputs on plant productivity and N-removal and retention. Submission Package ID: MDE7PD |
| Availability date: | |
| Metadata version: | 8 |
| Keydate: | 2020-03-09 17:40:49+00 |
| Editdate: | 2020-05-07 19:24:40+00 |