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restoring eelgrass to the neponset river estuary n.
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Restoring Eelgrass to the Neponset River Estuary PowerPoint Presentation
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Restoring Eelgrass to the Neponset River Estuary

Restoring Eelgrass to the Neponset River Estuary

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Restoring Eelgrass to the Neponset River Estuary

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  1. Restoring Eelgrass to the Neponset River Estuary The Influence of Salt Marshes

  2. Goals of Neponset Restoration • Restore water quality • Restore ecosystem heath and function • Restore ecosystem services

  3. Are oysters the answer?

  4. Conversion from NTU to TSS is site specific but is estimated as NTU*2.5 =TSS (mg/L)

  5. Conversion from NTU to TSS is site specific but is estimated as NTU*2.5 =TSS (mg/L)

  6. Salt Marshes • Extremely productive ecosystems • Rich in marine life • Important animal habitat • Nursery • Sanctuary • Protect shore lines • Wave action • Erosion • Filtering nutrients • Enhance water quality

  7. Water Quality Improvement • Sedimentation along marsh • Deposited during tidal flux and storms • Rates vary among sites and depend on particle size • Rates currently unknown for Neponset • Will be enhanced with salt marsh restoration • Particulate nutrients also deposited in marsh • Excess of nutrients in most coastal systems • Basins general net importers of nutrients • Majority of nutrients deposited in marsh

  8. Marshes of Neponset Historic

  9. Marshes of Neponset Present

  10. How much marsh do we need? For 1km -39.5 33.3 -1.1 -2.6 -0.6 9.0 -1.6 -0.4 -2.2 These are measurements of kg/ 532 km2 In 1991 there was ~1km2of marsh in the Neponset

  11. Examples of Restoration • Success • Long Island Sound- CT • Sachuest Salt Marsh- RI • San Francisco Bay- CA • And failures • San Diego Bay- Sweetwater Marsh • Several small sites in NW Europe • Debate over “success” vs. “failure” • What is “restoration”? • What goals need to be reached? • Often cannot restore biodiversity • May take longer for some factors to recover

  12. Neponset Restoration Potential • Two projects already under taken: • In 2005 dredging restored 0.06km2of salt marsh to the Neponset Estuary • In 2011 0.2km2were restored at Broad Meadows in Quincy • Small restoration takes a lot of effort • Broad Meadows cost $5.4 million • Need to set goals and timeline • Need room to expand • Needs to be suitable habitat

  13. Marshes of Neponset Present

  14. References • Oysters and TSS: • Cerco and Noel 2007 • Nutrient Data: • MWRA Neponset River Physical Measurements, collected 1989 through 2011 • http://www.nae.usace.army.mil/projects/ma/bhnip/MonitoringRpt09/Summary%20Report%20Plume%20Monitoring.pdf • General Marsh Information: • http://oceanservice.noaa.gov/facts/saltmarsh.html • http://www.dep.state.fl.us/coastal/habitats/saltmarshes.htm • http://www.dnr.sc.gov/marine/pub/seascience/dynamic.html • Water Quality and Marshes: • http://www.bainbridgewa.gov/documents/pln/2011_smp_reference3/stumpf_rp_the_process_of_sedimentation_on_the_surface_of_salt_marsh.pdf • http://geotest.tamu.edu/userfiles/167/110.pdf • Maps of Marsh Loss: • http://www.mass.gov/czm/ma_estuarine_trends_1.pdf • Marsh Nutrient Up-take: • http://www.bainbridgewa.gov/documents/pln/2011_smp_reference3/stumpf_rp_the_process_of_sedimentation_on_the_surface_of_salt_marsh.pdf • Current Marsh Extent: • http://maps.massgis.state.ma.us/map_ol/oliver.php • http://www.fws.gov/wetlands/Documents/Wetland-Status-and-Recent-Trends-for-the-Neponset-Watershed-Massachusetts-1977-1991.pdf • Restoration Information: • ftp://ftp.epchc.org/EPC_Wetlands_FTP/Hart/Literature/Zedler%20and%20Callaway%201999.%20Tracking%20Wetland%20Rest..pdf • http://www.ci.bainbridge-isl.wa.us/documents/pln/2011_smp_reference3/thom_rm_adaptive_mgmt_of_coastal_ecosystem_restoration_projects.pdf • http://www.vliz.be/imisdocs/publications/114137.pdf • Prior Restoration Efforts: • http://www.neponset.org/Restoration-SaltMarsh.htm • http://www.mass.gov/dfwele/der/pdf/der_annual_report_2011.pdf • Cover and Land Use Maps: • http://www.neponset.org/BasinPlan/Low%20Resolution/NeponsetAssessLoRes.pdf