| Contributors | Affiliation | Role |
|---|---|---|
| Spivak, Amanda | Woods Hole Oceanographic Institution (WHOI) | Principal Investigator |
| Ake, Hannah | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
Photosynthetically active radiation (PAR; mmol photons m-2 s-1) was recorded with a LI-COR underwater spherical quantum sensor (LI-193) and datalogger (LI-1400) situated in the middle of the fiberglass tank during each of the stable isotope labeling experiments in June, August, and October.
Related References:
Spivak, AC and J Ossolinski. 2016. Limited effects of nutrient enrichment on bacterial carbon sources in salt marsh tidal creek sediments. Marine Ecology Progress Series. 544:107-130. 10.3354/meps11587
Photosynthetically active radiation (PAR; umol photons m-2 s-1) was recorded with a LI-COR underwater spherical quantum sensor (LI-193) and datalogger (LI-1400) situated in the middle of the fiberglass tank.
BCO-DMO Data Processing Notes:
-reformatted column names to comply with BCO-DMO standards.
-added ISO_DateTime_UTC column
-replaced all blank cells with "nd"
| File |
|---|
PAR_data.csv (Comma Separated Values (.csv), 95.36 KB) MD5:809cbbe2607b914eae0465938a1ae34f Primary data file for dataset ID 669741 |
| Parameter | Description | Units |
| date | Date of sampling; mm/dd/yy | unitless |
| time | Time of sampling; HH:MM | unitless |
| PAR_H2O | Photosynthetically active radiation in water tank | nmol photons m-2 s-1 |
| PAR_daytime | Photosynthetically active radiation; sampled in daytime | nmol photons m-2 s-1 |
| PAR_lnH2O | Natural log of photosynthetically active radiation in tank | log |
| PAR_lndaytime | Natural log of photosynthetically active radiation during daytime | log |
| ISO_DateTime_UTC | Date/Time (UTC) ISO formatted | unitless |
| Dataset-specific Instrument Name | LI-COR underwater spherical quantum sensor (LI-193) and datalogger (LI-1400) |
| Generic Instrument Name | Photosynthetically Available Radiation Sensor |
| Dataset-specific Description | Situated in the middle of a fiberglass tank. |
| Generic Instrument Description | A PAR sensor measures photosynthetically available (or active) radiation. The sensor measures photon flux density (photons per second per square meter) within the visible wavelength range (typically 400 to 700 nanometers). PAR gives an indication of the total energy available to plants for photosynthesis. This instrument name is used when specific type, make and model are not known. |
| Website | |
| Platform | shoreside Massachusetts |
| Start Date | 2012-09-01 |
| End Date | 2015-08-15 |
Extracted from the NSF award abstract:
This project will address how rates of benthic microalgal production respond to eutrophication and geomorphological changes in human-impacted tidal creeks. Excess nutrient loading increases benthic algal biomass and likely stimulates production rates but the magnitude of nutrient and geomorphological effects on rates of production is unknown. Will changes in benthic algal productivity affect algal-bacterial coupling? Furthermore, how is algal-bacterial coupling affected by geomorphological changes, which may be exacerbated by excess nutrient loading but can also occur in pristine marshes?
This project will take advantage of the infrastructure of the TIDE project, a long-term saltmarsh eutrophication experiment at the Plum Island Ecosystem - Long Term Ecological Research site in Northeastern Massachusetts. Specifically, the PIs will measure benthic metabolism and examine algal- bacterial coupling in fertilized and ambient nutrient tidal creeks in the first field season. The following field season, they will compare sediment metabolism and carbon dynamics on slumped tidal creek walls (i.e. areas where low marsh has collapsed into the tidal creek) to that on the bottom of tidal creeks. In both years, gross and net production will be determined using an innovative triple oxygen isotope technique and traditional dissolved oxygen and inorganic carbon flux measurements. Comparisons between these methods will be useful in informing studies of sediment metabolism. Lipid biomarkers will be used to characterize the sources of organic matter to creek sediments, and stable isotope analysis of bacterial specific biomarkers to identify the sources of organic carbon utilized by sediment bacteria. The biomarkers will reveal whether sediment bacteria use organic matter substrates, such as benthic microalgal carbon, selectively or in proportion to availability. Overall, results from the proposed study will provide important information about how sediment carbon dynamics in shallow tidal creeks respond to long term eutrophication. Furthermore, findings will enhance understanding of the role of tidal creeks in coastal biogeochemistry.
| Funding Source | Award |
|---|---|
| NSF Division of Ocean Sciences (NSF OCE) |