Nutrient concentrations from porewater samples at a Spartina alterniflora-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem, MA.

uid=PIE,o=lter,dc=ecoinformatics,dc=org all public read LTE-MP-LAC-porewatermeans.03 Nutrient concentrations from porewater samples at a Spartina alterniflora-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem, MA. Plum Island Ecosystems LTER Program Jim Morris

Dept of Biological Sciences University of SC Columbia SC 29208 USA

Plum Island Ecosystems LTER Program Karen Sundberg

Baruch Marine Field Laboratory University of SC PO Box 1630 Georgetown SC 29442 USA

Plum Island Ecosystems LTER Program

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7485 pie_im@mbl.edu http://ecosystems.mbl.edu/PIE/ Rob Daoust additional investigator 2006 Porewater samples from a Spartina alterniflora-dominated salt marsh on the Rowley River in the Plum Island Ecosystem (PIE) LTER site were analyzed for ammonium, phosphate, sulfide and chloride concentrations. LTER PIE Plum Island Ecosystems Massachusetts Rowley River inorganic nutrients estuary salt marsh Spartina alterniflora porewater ammonium phosphate sulfide chloride Northeast United States 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 http://ecosystems.mbl.edu/PIE/data/MAR//LTE-MP-LAC-porewatermeans.html Law's Point on Rowley River, Rowley, MA, site of Spartina alterniflora plot level fertilization. -70.842472 -70.842472 42.731742 42.731742 1999-06-01 2011-10-31 Organisms Studied Genus Spartina Species alterniflora Collections occur approximately every month from May through October. Database is updated once annually, usually in the winter. Study and data collection are ongoing as of Jan 2012. Version 01; new data and metadata Version 02; new data and metadata Version 03: February 2, 2012, updated data and metadata to Oct 2011. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 2/1/12 5:00 PM for QA/QC to EML 2.1.0 Data Manager

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7485 pie_im@mbl.edu http://ecosystems.mbl.edu/PIE/ Plum Island Ecosystems LTER

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7485 pie_im@mbl.edu http://ecosystems.mbl.edu/PIE/ General: This data set is part of an on-going LTER project at the Plum Island Ecosystem (PIE) site. The sampling location is in a Spartina alterniflora-dominated marsh at Law's Point between the Rowley River and West Creek in Rowley MA. Sampling Description: Triplicate porewater diffusion samplers were permanently installed in control plots on the marsh platform in a Spartina alterniflora-dominated salt marsh. Each sampler collects porewater from depths of 10, 25, 50, 75, and 100 cm. Samples are retrieved approximately monthly from May through October. Porewater samples are either filtered (0.45 uM) and preserved with HCl (for PO4 and NH4) or preserved unfiltered with ZnAc (for sulfides) either in the field or immediately upon return from the field. These samples are then shipped to the lab in SC. Porewater collection began in June 1999. In May 2006 the Control porewater plots were relocated due to potential contamination from fertilized plots. Lab Methods: Filtered porewater samples are analyzed for PO4, NH4, and chloride concentrations according to standard laboratory protocols (Strickland and Parson 1972). Unfiltered, preserved porewater samples are analyzed for sulfide (Cline 1969). Numerical Processing: Data are reported as geometric means of sample concentrations from 3 depths within the root zone (10, 25, and 50 cm), and the 95% confidence interval, for 3 replicate samplers (n=9 per time). Statistics were computed using SAS (SAS System for Windows; release 8.02; SAS Institute, Inc; Cary, NC). Plum Island Ecosystems Long-Term Ecological Research (PIE LTER) Program Anne Giblin

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7488 agiblin@mbl.edu Lead PI Hap Garritt

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7485 pie_im@mbl.edu Information Manager The Plum Island Ecosystems (PIE) LTER is an integrated research, education and outreach program whose goal is to develop a predictive understanding of the long-term response of watershed and estuarine ecosystems at the land-sea interface to changes in climate, land use and sea level. The principal study site is the Plum Island Sound estuary, its coupled Parker, Rowley and Ipswich River watersheds and the adjacent coastal ocean, the Gulf of Maine. The PIE LTER focuses on how several aspects of global change influence organic matter and inorganic nutrient biogeochemistry and estuarine foodwebs. The inputs of organic matter and nutrients from land, ocean and marshes interact with the external drivers (climate, land use, river discharge, sea level) to dictate the extent and degree of nutrient and organic matter processing and determine the spatial patterns of estuarine productivity and trophic structure. This material is based upon work supported by the National Science Foundation under Grants OCE-9726921, OCE-0423565. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. The Plum Island Ecosystems (PIE) LTER site, is located in northeastern Massachusetts, 42.72 N, 70.85 W. The PIE LTER lies at the interface of a thinly soiled, formerly glaciated New England land mass and the highly productive Gulf of Maine. Three watersheds comprise the estuarine drainage basin: Parker (155 km2), Rowley (26 km2) and Ipswich (404 km2). The Ipswich River watershed is highly urbanized with Boston "bedroom" communities encroaching in the headwater region while the Parker is less urbanized and retains a higher proportion of forest. -71.2198 -70.7568 42.8276 42.4965 0 100 meter LTE-MP-LAC-porewatermeans.csv Nutrient concentrations from porewater samples at a Spartina alterniflora-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem, MA. LTE-MP-LAC-porewatermeans.csv 1 \r\n column , http://ecosystems.mbl.edu/PIE/data/MAR/data/LTE-MP-LAC-porewatermeans.csv site site name of sampling station name of sampling station year year year yyyy month month month mm Cl Cl chloride concentration, gCl/l gramPerLiter real . .=not measured L1 (Cl) L1 (Cl) lower limit; 95% confidence interval; gCl/l gramPerLiter real . .=not measured L2 (Cl) L2 (Cl) upper limit; 95% confidence interval; gCl/l gramPerLiter real . .=not measured NH4 NH4 ammonium concentration, uM-N micromolePerLiter real . .=not measured L1 (NH4) L1 (NH4) lower limit; 95% confidence interval; NH4, uM-N micromolePerLiter real . .=not measured L2 (NH4) L2 (NH4) upper limit; 95% confidence interval; NH4, uM-N micromolePerLiter real . .=not measured PO4 PO4 phosphate concentration, uM-P micromolePerLiter real . .=not measured L1 (PO4) L1 (PO4) lower limit; 95% confidence interval; PO4, uM-P micromolePerLiter real . .=not measured L2 (PO4) L2 (PO4) upper limit; 95% confidence interval; PO4, uM-P micromolePerLiter real . .=not measured S2 S2 sulfide concentration, uM-S micromolePerLiter real . .=not measured L1 (S2) L1 (S2) lower limit; 95% confidence interval; S2, uM-S micromolePerLiter real . .=not measured L2 (S2) L2 (S2) upper limit; 95% confidence interval; S2, uM-S micromolePerLiter real . .=not measured comments comments Information pertaining to individual data points Information pertaining to individual data points grams per liter µM = µmoles per liter of solution