Monica Candal Presentation

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Determining Sites for Eelgrass Restoration in Narragansett Bay, Rhode Island: 

Determining Sites for Eelgrass Restoration in Narragansett Bay, Rhode Island By: Monica Candal

Slide3: 

Is eelgrass restoration feasible in Narragansett Bay?

Principal Questions: 

Principal Questions Are Save the Bay restoration sites succeeding? Why or why not? Where are other potential restoration sites in Narragansett Bay?

Presentation: 

Presentation Context Current Transplant Evaluation Site Selection Parameters Methodology and Results for Each Parameter General Conclusions

Study Area and Species: 

Study Area and Species Narragansett Bay, Rhode Island, USA Zostera marina East Passage West Passage Sakonnet River Greenwich Bay Mount Hope Bay Providence River

Why is eelgrass important?: 

Why is eelgrass important? Productivity in ecosystems Water clarity Quality of sediments Nutrient and carbon cycling Indicator species

Why is eelgrass important?: 

Why is eelgrass important? Productivity in ecosystems Water clarity Quality of sediments Nutrient and carbon cycling Indicator species

Why is eelgrass important?: 

Why is eelgrass important? Productivity in ecosystems Water clarity Quality of sediments Nutrient and carbon cycling Indicator species

Why is eelgrass important?: 

Why is eelgrass important? Productivity in ecosystems Water clarity Quality of sediments Nutrient and carbon cycling Indicator species

Why is eelgrass important?: 

Why is eelgrass important? Productivity in ecosystems Water clarity Quality of sediments Nutrient and carbon cycling Indicator species

Eelgrass Depletion: 

Eelgrass Depletion 1840-1980 1980-Present

Eelgrass Depletion: 

Eelgrass Depletion Reasons for eelgrass demise Wasting disease Poor water quality

Factors Affecting Habitat Selection: 

Factors Affecting Habitat Selection Light Sediment Depth Water velocity

Past Restoration Research: 

Past Restoration Research Chesapeake Bay Submerged Aquatic Vegetation Habitat Requirements and Restoration Targets: A Technical Synthesis Percent Light through the Water (PLW) Percent Light at the Leaf (PLL) Narragansett Bay Eelgrass Restoration Site Selection Model (NBERSSM)

Monitoring Sites: 

Monitoring Sites

Slide17: 

King’s Beach

Eelgrass Survival: 

Eelgrass Survival

Chesapeake Model: 

Chesapeake Model Model requires three inputs: Dissolved Inorganic Nitrogen Total Suspended Solids Secchi Depth to derive Kd Data collected at transplant sites

Chesapeake Model Results: 

Chesapeake Model Results

Save the Bay Model Methods: 

Save the Bay Model Methods Using Short 2002, determined score for each parameter Multiplied parameter scores together 0 is unsuitable 2 is suitable 4 is extremely suitable

Save the Bay Model Results: 

Save the Bay Model Results

Sediment Analysis: 

Sediment Analysis McMaster data Interpolation based on three studies

Depth Analysis: 

Depth Analysis NOAA hydrographic data All sites below water within depth limit

Velocity Analysis: 

Velocity Analysis Tidal velocity calculation according to RI Sea Grant 1990-1999 data Optimal current velocity 10-100 cm/s

Present Conclusions: 

Present Conclusions Definitive conclusions based on any one model or parameter are not yet possible Current conditions in the bay inhibit determination of any optimal location

Acknowledgements: 

I would like to thank: Steve Hamburg, Don Pryor, Warren Prell, Sue Tuxbury, Marci Cole, Michelle Denault, Dave Murray, Lynn Carlson, Quebec-Labrador Foundation Acknowledgements