uid=PIE,o=lter,dc=ecoinformatics,dc=org all public read LTE-MP-porewater.08 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/ Robert Daoust additional investigator Helen Marshall additional investigator Diana Rodriguez additional investigator 2000 Nutrient concentrations from porewater samples at three long term marsh fertilization experimental research sites. The sites include one Typha-dominated brackish marsh, one Spartina alterniflora-dominated salt marsh, and one S. patens-dominated salt marsh. Sites are located on the Rowley and upper Parker Rivers in the Plum Island Ecosystem (PIE) LTER site. PIE LTER Plum Island Ecosystems Massachusetts Rowley River Parker River inorganic nutrients porewater salt marsh nutrient cycling ammonium phosphate Typha Spartina 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/LTE/LTE-MP-porewater.html Law's Point on Rowley River, Rowley, MA, site of PIE LTER Spartina alterniflora plot level fertilization experiment. -70.842472 -70.842472 42.731742 42.731742 Law's Point on Rowley River, Rowley, MA, site of PIE LTER Spartina patens plot level fertilization experiment -70.842915 -70.842915 42.730954 42.730954 Upper Parker River off Orchard St., Newbury, MA, Typha sp. plot level fertilization experiment -70.917717 -70.917717 42.756738 42.756738 1999-07-01 2012-09-30 Organisms Studied Genus Typha Genus Spartina Species alterniflora Genus Spartina Species patens Collections occur every month from May through October. Database is updated once annually, usually in the winter. Study and data collection are ongoing as of Dec 2012. Version 01: July 11, 2006 Level 3+ EML using Jim laundre's Excel program Version 02: January 10, 2007 data and metadata update Version 03: March 12, 2008 Data and metadata update Version 04: February 20, 2009 Data and metadata update Version 05: January 13, 2010 Data and metadata update Version 06: October 25, 2011 Data and metadata update Version 07: January 12, 2012, 2011 data and metadata update, using MarcrosExportEML_HTML (working)pie_excel2007.xlsm 1/12/12 11:51AM for QA/QC to EML 2.1.0 Version 08: March 14, 2013, 2012 data and metadata updated to comply with importation to Drupal and LTER PASTA. Research location name and description updated.Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 3/14/13 12:02 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 a study including three on-going plot-level fertilization sites. The first (LTE-MP-LPA) is in the low marsh at Law's Point along the Rowley River. The second (LTE-MP-LPP) is in the high marsh at Law's Point along the Rowley River. The third (LTE-MP-ORT) is in a brackish water marsh on an upstream tributary of the Parker River. Porewater samplers were established at LTE-MP-LPA in Jun 1999, at LTE-MP-LPP in Aug 2000 and at LTE-MP-ORT in Jun 2000. At each site a system of boardwalks was built to incorporate 12 experimental plots (1m2 each). There are 4 treatments (three reps each) within the boardwalk structure. The 4 treatments are Control, N-fertilized, P-fertilized, N+P fertilized. Additionally, at each site there are 3 control plots and 3 N+P fertilization plots external to the boardwalk structure. These external plots contain porewater samplers, and, in some cases, biomass census plots. In May 2006 the control porewater plots and control census plots at all three sites were moved because of potential contamination from fertilized plots. Fertilizer is buried at several locations within each plot, monthly, from May-Sept. From 1999-2001 the annual fertilization rate was 30 molN/m2/y and 15 mol P/m2/y. From 2002 to present fertilization rate is 7.5 mol N/m2/y and/or 3.75 mol P/m2/y. N fertilizer was NH4NO3 through 2008, and currently is nitrate/urea/sulfate (34-0-0). P fertilizer is P2O5 (0-44-0). Sampling Description: Triplicate porewater diffusion samplers are permanently installed in fertilized (30 mol N/m2/y and 15 mol P/m2/y through 2001; 7.5 mol N/m2/y and 3.75 mol P/m2/y beginning in 2002) and control plots at each of the three research sites. 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 filtered (0.2 uM) and preserved with either ZnAc (for sulfides) or acidified to pH<2 (for SRP and NH4) immediately upon return from the field. These samples are then shipped to the lab in SC for analysis. Lab Methods: Filtered porewater samples are analyzed for SRP and NH4 on a Bran+Luebbe AutoAnalyzer according to standard laboratory protocols (Strickland and Parsons (1972)). Samples are analyzed for Sulfide following the method of Cline (1969) L&O 14: 454-456. Chloride concentrations are measured on a Haake Buchler Chloridometer. Salinity is calculated from chloride concentrations. 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-porewater.csv Nutrient concentrations from porewater samples at three marsh fertilization experimental research sites. LTE-MP-porewater.csv 1 \r\n column , http://ecosystems.mbl.edu/PIE/data/LTE/data/LTE-MP-porewater.csv SITE SITE current name of sampling station, following naming protocol current name of sampling station, following naming protocol YEAR YEAR year yyyy MONTH MONTH month mm TRT TRT treatment NP fertilized C control REP REP porewater sampler replicate number porewater sampler replicate number DEPTH DEPTH depth (cm) centimeter real SRP SRP soluble reactive phosphorus concentration (uM SRP) micromolePerLiter real . .=not measured BD BD=below detection NH4 NH4 ammonium concentration (uM NH4) micromolePerLiter real . .=not measured BD BD=below detection S2 S2 sulfide concentration (uM S-2) micromolePerLiter real . .=not measured BD BD=below detection Cl Cl chloride concentration (g Cl/l) gramPerLiter real . .=not measured BD BD=below detection SALINITY SALINITY salinity (ppt) partPerThousand real . .=not measured BD BD=below detection 5970 µM = µmoles per liter of solution grams per liter ratio of two quantities as parts per thousand (1:1000)