1. Impacts of Shoreline Modification on SAV distribution Becky Golden, Brooke Landry, Lee Karrh and Mark Lewandowski August 19, 2013

2. Methodology Dependent Variables: –Frequency of Occurrence (patchiness) –SAV Percent Cover (density) –Species Richness & Diversity –Start of Bed (a) & –Length of Bed Distance (b) –Start Depth & End Depth –Slope SAV bed NaturalRipRap SAV bed a b

3. Pot04 20102011 20132012 10 14 (7) 12 (7) ? 19 (7)*

4. Preliminary Analyses Effects of Salinity Regime & Shoreline Type Effects of Watershed Landuse & Shoreline Type

5. Results-Salinity Regime & Shoreline Type Significant effect of Shoreline Type on: –Slope, minimum water depth, maximum bed length, SAV frequency, SAV % cover, species richness and diversity Significant interactions between Salinity and Shoreline Type: –Minimum water depth, SAV % cover and species richness

6. B A * * SAV % cover higher @ natural sites

7. B A * Min H 2 O depths shallower @ natural sites

8. SAV beds are more diverse and extended farther from shore @ natural sites

9. Results: Watershed Land-use Significant effect of Landuse on: –Slope, start of bed, minimum water depth, maximum water depth, maximum bed length, SAV frequency, SAV % cover, species richness and diversity Significant interactions between Landuse and Shoreline Type: –Maximum water depth, SAV % cover and species richness

10. E D C A A B

11. D BC CD B A

12. D D A A B C

13. Summary Salinity Regime and Watershed Landuse are impacting SAV at subestuary scale Shoreline type is also affecting SAV at finer scale: –SAV adjacent to natural shorelines have higher densities, species richness and diversity, and extend farther from shore