marine nearshore ecology at the restored seahurst park...juvenile chinook salmon (cont.) •tend to...
TRANSCRIPT
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Marine Nearshore Ecology at the Restored Seahurst Park
Presented by
Paul Schlenger
Confluence Environmental Company
September 23, 2014
Environmental Science Center Public Education Series
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Postcards from Puget Sound
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They’re All Connected!
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Nearshore Connections
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Nearshore Connections
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Nearshore Connections: Sediment Input, Transport, and Deposition
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Sediment Drift Cell – 10 miles to Duwamish Head in Seattle
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Key Species Targeted in Restoration
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Juvenile Chinook Salmon
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Juvenile Chinook salmon
• Puget Sound populations of Chinook salmon federally listed as threatened under the Endangered Species Act
• Among most dependent on estuaries and marine nearshore
• Use areas for foraging, refuge from predators, physiological transition, and migratory corridors
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Juvenile Chinook salmon (cont.)
• Tend to stay close to shoreline during early marine stage, then move offshore as they grow
• Feed on amphipods, copepods, terrestrial-origin insects
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Juvenile Chinook salmon (cont.)
• Source: Brennan et al. 2004
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Forage Fish
• Sand lance
• Surf smelt
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Forage Fish (cont.)
• Forage fish occupy mid-trophic level of food web
Source: Mitchell 2006
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• Source: Lenfest Forage Fish Task Force 2012
Global study found that 75% of ecosystems studied have at least one highly/extremely dependent predator
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Forage Fish• Intertidal spawning by surf smelt and sand
lance
– Mid to upper intertidal
– Sand lance typically spawn in sand
– Surf smelt typically spawn in sand and gravel
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Forage Fish (cont.)
• WDFW data (http://wdfw.wa.gov/conservation/research/projects/marine_beach_spawning/)
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Forage Fish (cont.)
• http://www.youtube.com/watch?feature=player_detailpage&v=p46xlsh5snQ
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Native Eelgrass
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Native Eelgrass
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The Habitats Occupied
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Restoration Elements at Seahurst Park
• Photos courtesy of Peter Hummel, Anchor QEA
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Process Based Restoration Approach
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Restoration Elements at Seahurst Park
Before After
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Restoration Elements at Seahurst Park
Before
After
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Restoration Elements at Seahurst Park
Before
After
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Restoration Elements at Seahurst Park
After - NEW
After - Established
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Restoration Elements at Seahurst Park
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Restoration Elements at Seahurst Park
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Monitoring
• Pre- and post-construction monitoring (Jason Toft, UW)
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Invertebrate Densities
• Toft 2011
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• Toft 2011
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It’s All Connected!
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Upcoming Presentations and Site Walks
• Nearshore/Riparian and Wetland Habitat Lecture
– Tuesday, Sept. 30, 6:30 pm by John Small
• Hillside Geology Guided Tour
– Saturday, Oct. 4, 10:00 am by Bill Laprade