Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Plum Island Ecosystem LTER Database http://ecosystems.mbl.edu/PIE Acceptance and utilization of PIE-LTER data requires that: The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions. The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications. A copy of any resultant publications should be sent to: (Principal Investigator) Ecosystems Center; Marine Biological Laboratory Woods Hole, MA 02543 PLUM ISLAND ECOSYSTEM LTER DATABASE DATA FILE: STP-PR-Mesocosm.txt DOCUMENTATION FILE: STP-PR-Mesocosm.doc YEAR: PI: Charles Hopkinson OTHERS: Linda Deegan, Anne Giblin, John Hobbie, Joseph Vallino, Ishi Buffam, Robert Garritt, Jane Tucker, Meredith Hullar, Mark Benfield, and Ee Lin Lim BRIEF DESCRIPTION OF DATA FILE: Mesocosm experiment in which the effects of dissolved organic matter and nutrient additions on estuarine food webs were investigated. KEYWORDS: mesocosm, trophic, food web, light, ammonium, nitrate, phosphate, organic, carbon, nitrogen, respiration, production, community, fish, isotope, bacteria, chlorophyll SITE TYPE: Short-term Projects and Experiments RESEARCH LOCATION: Parker River Estuary EXPERIMENTAL DESIGN AND METHODS: In the Woods Hole Harbor, MA, four large transparent bags (7m3) were submerged and filled with sea-water. Twelve larval Atlantic silversides (Menidia menidia) were added to each bag. Large fish and other predators were excluded from the mesocosms. The treatments consisted of a control, an organic matter addition, a daily nutrient addition, and organic matter plus nutrient addition. Organic matter additions were 35 mM dissolved organic carbon (GF/F filtered), from leached leaf litter, and was added once at the outset of the experiment. 5 mM NO3-, 0.5 mM PO43-, and 7 uM SiO3 were added daily (at 17:00) in the nutrient addition bags. All mesocosms also received NaH13CO3 to raise 13C of DIC pool to 120 ‰. NOTES AND COMMENTS: VARIABLE DESCRIPTION: DAY = day from start of experiment TREATMENT = treatment (CONTROL = control; DOM = dissolved organic matter addition; NUTS = nutrient addition; DOM+NUTS = dissolved organic matter and nutrient addition) CATEGORY = category of data (WATER CHEMISTRY = NH4, NO3, PO4, Chlorophyll, DOC, POC, PON; PRODUCTION = bacterial production, primary production, size fractionated production; METABOLISM = gross production, respiration, net community production; LIGHT EXTINCTION = light extinction; FISH = fish weight and isotope data, ISOTOPE = isotope data for various dissolved species, particulate size fractions and fish; ZOOPLANKTON = zooplankton species counts; DIATOM = diatom species counts; µFLAGELLATES = µflagellate counts; CILIATES = ciliate species counts, DINOFLAGELLATES = dinoflagellate species counts; BACTERIA = bacterial counts; PAR = light data TYPE = further description of data type SIZE MIN = minimum size of sample (µm) SIZE MAX = maximum size of sample (µm) NUMBER = number of organisms per Liter of sample NH4 = ammonium (µM) NH4 SE = standard error of ammonium analysis PO4 = soluble reactive phosphorus (µM) NO3 = nitrate + nitrite (µM) DOC = dissolved organic carbon (µM) POC = particulate organic carbon (µM) PON = particulate organic nitrogen (µM) CHLA = chlorophyll a (µg L-1) PP = primary production (µmol C L-1 d-1) GP = gross production (µmol C mesocosm-1 d-1) RESP = respiration (µmol C mesocosm-1 d-1) NCP = net community production (µmol C mesocosm-1 d-1) BAC PROD = bacterial production (µmol C d-1) LTEXT = light extinction coefficient (m-1) FISH WT = fish weight (g fish-1) 15N = 15N of sample (per mil) 13C = 13C of sample (per mil) PAR = photosynethetically active radiation (µE m-2 s-1) CALCULATIONS: FOR MORE INFORMATION, CONTACT: OTHER DATA FILES TO REFERENCE: REFERENCE CITATIONS: DATA AVAILABILITY STATUS: Type 3 ARCHIVE INFORMATION: Date of entry: Data entered by: Comments: