Download STP-PR-Mesocosm - Ecosystems Center

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: