Ecosystem Restoration Presented by John Small, PLA, ASLA September - - PowerPoint PPT Presentation

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Ecosystem Restoration Presented by John Small, PLA, ASLA September - - PowerPoint PPT Presentation

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Seahurst Park Wetland and Riparian Restoration: Ecosystem Restoration Presented by John Small, PLA, ASLA September 30, 2014 Environmental Science Center Public Education Series Seahurst Park Wetland and Riparian Restoration: 0

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

Presented by John Small, PLA, ASLA September 30, 2014 Environmental Science Center Public Education Series

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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  • 1. Introduction to Landscapes and Ecosystems
  • 2. Plant Communities of Seahurst Park
  • 3. Restoration Design and Construction
  • 4. Maintenance and Sustainability

Presentation Overview

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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  • Landscapes
  • Ecosystems
  • Communities
  • Habitats
  • 1. Introduction to Landscapes and Ecosystems
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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Ecosystem Restoration Goals

  • Preserve existing high-functioning

nearshore habitats

  • Restore and protect the natural bluff-

to-beach sediment process

  • Restore beach slopes and substrates
  • Restore forage-fish spawning, juvenile

salmon rearing, and migration intertidal habitats

  • Restore upland and shallow intertidal

habitat connectivity

  • Diversify habitat in the

freshwater/saltwater interface

Before After

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Detritus-based Food Web

  • The entire food web is based

largely on nutrients from land

  • Vegetation broken down by

bacteria, fungi, zoo plankton and insects

  • Occurs on land and in

nearshore, out to the edges of the photic zone

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Process Function Structure

Wave energy Sediment delivery Sediment transport Beach profile Sediment grain size Beach temperature Forage fish spawning and production Food web support

Conceptual Model: The role of Puget Sound nearshore beaches in sustaining forage fish

Source, Conceptual Model: PSNERP and Simenstad et al. 2006; Penttila 2007

Process-based Restoration Approach

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Supporting Habitat-forming Processes

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Net Shore Drift Accretion zone Accretion zone

Bluff-to-beach Sediment Supply Processes

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Habitat Preservation and Restoration Zones

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Reconnecting Terrestrial/Riparian and Aquatic/Intertidal Habitats

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Reconnecting Freshwater Streams and Marine Habitats

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Balancing Habitat, Access, and Shoreline Stability

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Terrestrial Communities

Madrone/Salal

  • Madrone
  • Salal
  • Big Leaf Maple
  • Indian Plum
  • Sword Fern

Sandy, Drier Soils

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Terrestrial Communities

Hemlock/Douglas fir

  • Vine Maple
  • Salal
  • Salmonberry
  • Indian Plum
  • Sword Fern

Less Disturbed, Second-growth, Drier Soils

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Terrestrial Communities

Western Red Cedar

  • Salmonberry
  • Lady Fern
  • Skunk Cabbage
  • Devil’s Club

Less Disturbed, Second-growth, Wetter Soils

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Terrestrial Communities

Alder/Salmonberry

  • Horsetails
  • Salal
  • Piggyback Plant
  • Lady Fern
  • Blackberry

Disturbed Areas, Wetter Soils

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On-site Unstable Hillsides

Map Source: Shannon & Wilson 2002

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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Aquatic Communities

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Accretion Zones are Hot-spots in a Detritus- based Food Web

Net Shore Drift Accretion zone Accretion zone

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Seahurst Park – Wetland and Riparian Restoration: Ecosystem Restoration

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South Shoreline After Re-vegetation

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Beach Communities

Dune Grass (Elymus mollis)

  • Gumweed
  • Vetch
  • Coastal Strawberry
  • Salt Grass (Distichilis spicata)

Pickleweed

  • Fat Hen
  • Jaumea
  • Silverweed (Potentilla Pac.)
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Marsh Communities

Dune Grass (Elymus mollis)

  • Gumweed
  • Vetch
  • Coastal Strawberry
  • Salt Grass (Distichilis spicata)

Pickleweed

  • Fat Hen
  • Jaumea
  • Silverweed (Potentilla Pac.)
  • Carex
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Submerged Aquatic Vegetation

  • Eelgrass
  • Kelp
  • Algae
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North Shoreline – Completed Beach

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Is It Working?

Source: Armbrust, Toft, and Cordell 2009

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Is It Working?

Source: Armbrust, Toft, and Cordell 2009

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Is It Working?

What juvenile chinook eat at Seahurst Park:

Source: Brennan, Higgins, Cordell, and Stamatiou 2004

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Summary

  • 1. Introduction to Landscapes and Ecosystems
  • 2. Plant Communities of Seahurst Park
  • 3. Restoration Design and Construction
  • 4. Maintenance and Sustainability
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North Shoreline – Completed Beach

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North Shoreline – Pre-project

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North Shoreline – Path and Beach Construction