uid=PIE,o=lter,dc=ecoinformatics,dc=org all public read WAT-VA-Load.03 Plum Island Ecosystems LTER Program Wilfred Wollheim

Institute for the Study of Earth, Oceans, and Space University of New Hampshire Morse Hall, Room 452 Durham NH 03824 USA

Plum Island Ecosystems LTER Program Charles Hopkinson

Georgia Sea Grant College Program University of Georgia 229 Marine Sciences Athens GA 30602 USA

Plum Island Ecosystems LTER Program Hap Garritt

Marine Biological Laboratory The Ecosystems Center 7 MBL Street Woods Hole MA 02543 USA

Plum Island Ecosystems LTER Program Emily Gaines

Marine Biological Laboratory The Ecosystems Center 7 MBL Street Woods Hole MA 02543 USA

Plum Island Ecosystems LTER Program Rebecca Prosser

Marine Biological Laboratory The Ecosystems Center 7 MBL Street Woods Hole MA 02543 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/ Catherine Caruso additional investigator Mac Lee additional investigator Corey Lawrence additional investigator John Logan additional investigator Josh Goldstein additional investigator Greg Peterson additional investigator Nat Weston additional investigator Ishi Buffam additional investigator 2001 Nutrient concentrations for various forms of N, P, C, as well as suspended sediments, are determined from monthly grab samples taken at the Ipswich and Parker dams. These nutrient concentrations are then used in conjunction with USGS discharge data (recorded at gages in the Parker River at Byfield, MA and the Ipswich River at Ipswich, MA) to calculate annual nutrient loading to the Estuary, coming over each dam. Annual yield is also calculated for both dams. PIE LTER organic matter inorganic nutrients Ipswich River Parker River dam loading nutrient Plum Island Estuary 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/WAT/WAT-VA-Inputs.html Ipswich River, Sylvania Dam, Ipswich, MA , input water nutrient sampling -71.22 -70.75 42.83 42.5 Parker River, Central St. Dam, Newbury, MA, input water nutrient sampling -71.22 -70.75 42.83 42.5 1993-09-05 2010-09-19 Nutrient samples continue to be taken monthly. Monthly nutrient concentrations are updated annually in WAT-VA-Inputs. Every 2-3 years, WAT-VA-Load is updated with loading calculated from concentrations in WAT-VA-Inputs. Version 01, 27-Sep-2006 EML metadata created level ~3.5 includes attribute information Version 02, data updates, 11Jan2010 Version 03: February 1, 2012, updated data and metadata to Dec 2010. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 2/1/12 4:54 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/ Sample Collection: Grab samples are collected monthly at the Parker and Ipswich dams. Water is filtered and/or partitioned for analysis for suspended solids, particulate organic nitrogen (PON), total dissolved nitrogen (TDN), ammonium (NH4), nitrate (NO3), dissolved inorganic nitrogen (DIN), dissolved organic nitrogen (DON), particulate phosphorus (PPO4), total dissolved phosphorus (TDP), phosphate (PO4), particulate organic carbon (POC), dissolved organic carbon (DOC). Analyses are conducted according to PIE-LTER protocols (http://ecosystems.mbl.edu/pie/data/method.htm). Discharge: Discharge data is mined from the USGS website (http://waterdata.usgs.gov/nwis) for the Parker River gage at Byfield, MA and the Ipswich River gage at Ipswich, MA. Since the gages are NOT located directly at the dams where nutrient sampling occurs, the USGS discharge data is multiplied by a correction factor (1.1812 for the Parker data, and 1.1964 for the Ipswich data) to obtain discharge over the respective dams. Loading/Yield Calculations: Monthly nutrient concentrations are multipli0ed by total monthly discharge over the dams to estimate nutrient loading on a monthly timescale. Monthly loading numbers are added together to obtain annual loading per water year. Water years are determined according to USGS data updates, and generally start in September. The numerical year given to a water year is the new year reached in January during the September-September cycle (i.e. Sept 2003 - Sept 2004 is water year 2004). Yield calculations are derived from the loading calculations by dividing the nutrient loading by watershed area upstream of the dam (at Parker this is 65.2km2, and Ipswich this is 387.4km2). Total N and P loads and yields reflects organic and inorganic forms of nitrogen. Total C loads and yields reflect only organic forms of carbon, ie dissolved inorganic carbon was not measured and is not included. Sample yield calculation: 1 tonne = 1000kg 1km^2 = 100 hectares Ipswich Dam, Nitrogen Yield, 1994 126 tonnes x (1000 kg/tonne) = 126,000 kg 387.4 km^2 x (100 hectares/km^2) = 38,740 hectares 126,000 kg / 38,740 hectares = 3.25 kg / hectare / year 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 WAT-VA-Load.csv Annual Nutrient Loading and Yield to Plum Island Estuary, As Measured at the Ipswich and Parker Dams WAT-VA-Load.csv 1 \r\n column , http://ecosystems.mbl.edu/PIE/data/WAT/data/WAT-VA-Load.csv Water Year Water Year USGS-assigned water year YYYY Year Start Year Start Start date of the given water year DD-MMM-YYYY Year End Year End End date of the given water year DD-MMM-YYYY Days Days number of days in water year number whole Dam Dam Dam site (Ipswich or Parker) Dam site (Ipswich or Parker) Annual Discharge Annual Discharge Total water discharge over the dam per year meterCubedPerYear real Mean Daily Discharge Mean Daily Discharge Average water discharge over the dam per day meterCubedPerDay real Total N Load Total N Load Annual loading of total nitrogen as N tonnePerYear real Total N Yield Total N Yield Annual yield of total nitrogen as N kilogramPerHectarePerYear real PON Load PON Load Annual loading of particulate organic nitrogen as N tonnePerYear real PON Yield PON Yield Annual yield of particulate organic nitrogen as N kilogramPerHectarePerYear real TDN Load TDN Load Annual loading of total dissolved nitrogen as N tonnePerYear real TDN Yield TDN Yield Annual yield of total dissolved nitrogen as N kilogramPerHectarePerYear real NH4 Load NH4 Load Annual loading of ammonium as N tonnePerYear real NH4 Yield NH4 Yield Annual yield of ammonium as N kilogramPerHectarePerYear real NO3 Load NO3 Load Annual loading of nitrate as N tonnePerYear real NO3 Yield NO3 Yield Annual yield of nitrate as N kilogramPerHectarePerYear real DIN Load DIN Load Annual loading of dissolved inorganic nitrogen as N tonnePerYear real DIN Yield DIN Yield Annual yield of dissolved inorganic nitrogen as N kilogramPerHectarePerYear real DON Load DON Load Annual loading of dissolved organic nitrogen as N tonnePerYear real DON Yield DON Yield Annual yield of dissolved organic nitrogen as N kilogramPerHectarePerYear real Total P Load Total P Load Annual loading of total phosphorus as P tonnePerYear real Total P Yield Total P Yield Annual yield of total phosphorus as P kilogramPerHectarePerYear real PPO4 Load PPO4 Load Annual loading of particulate phosphorus as P tonnePerYear real PPO4 Yield PPO4 Yield Annual yield of particulate phosphorus as P kilogramPerHectarePerYear real TDP Load TDP Load Annual loading of total dissolved phosphorus as P tonnePerYear real TDP Yield TDP Yield Annual yield of total dissolved phosphorus as P kilogramPerHectarePerYear real PO4 Load PO4 Load Annual loading of phosphate as P tonnePerYear real PO4 Yield PO4 Yield Annual yield of phosphate as P kilogramPerHectarePerYear real Total C Load Total C Load Annual loading of total organic carbon as C tonnePerYear real Total C Yield Total C Yield Annual yield of total organic carbon as C kilogramPerHectarePerYear real POC Load POC Load Annual loading of particulate organic carbon as C tonnePerYear real POC Yield POC Yield Annual yield of particulate organic carbon as C kilogramPerHectarePerYear real DOC Load DOC Load Annual loading of dissolved organic carbon as C tonnePerYear real DOC Yield DOC Yield Annual yield of dissolved organic carbon as C kilogramPerHectarePerYear real Total N:P Total N:P Ratio of annual total nitrogen moles-N to annual total phosphorus moles-P dimensionless real Total C:N Total C:N Ratio of annual total organic carbon moles as C to annual total nitrogen moles as N dimensionless real Susp Sed Load Susp Sed Load Annual loading of suspended sediment (dry weight) kilogramPerYear real Susp Sed Yield Susp Sed Yield Annual yield of suspended sediment (dry weight) kilogramPerHectarePerYear real cubic meters per year = 1000 liters per m^3 *60sec/min*60min/hr*24hr/day*365day/yr cubic meters per day = 1000 liters per m^3 *60sec/min*60min/hr*24hr/day tonnes Per Year kilograms Per Hectare Per Year kilograms of substance per year