San Francisquito Watershed Council

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San Francisquito Watershed Council
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Large Woody Debris

• What is the importance of wood for fish as
  individuals, populations and communities
• Understanding relationships between fish and wood
  could play a key role in management strategies
  and restoration

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Wood is Good

• Habitat preferences of riverine fish are
  determined to a large extent by bioenergetics

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Wood is Good

• Large wood influences flow
• Flow influences the food supply of fish
• Flow influences the amount of energy fish expend
  when swimming

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Wood is Good

• Large wood dissipates the energy of high flows
  increasing habitat diversity by producing a
  variety of flows

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Wood is Good

• Large wood traps coarse sediment which promotes
  gravel bars and instream islands
• Creation of pool habitat associated with large
  woody debris

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Wood is Good

• Wood provides a stable substrate for invertebrate
  communities

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Wood is Good

• Wood provides structure and nutrients for
  microbiological organisms important to aquatic
  ecosystems
• Biofilm forms on inundated wood and is comprised
  of algae, fungi and bacteria

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Wood is Good

• Wood can strongly influence trophic structure

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SMP and Woody Debris

• Stream Maintenance Program
• Large Woody Debris Program

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SMP and Large Woody Debris

• Anchor or cable wood in place
• Use wood in bank protection designs

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What can you do to help?

• Encourage creek side residents to leave wood in
  place
• Call the SCVWD if you think wood is eroding banks
  or collecting debris

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SCVWD Fisheries Projects and Programs

• TMDL Mercury Study
• Guadalupe Flood Protection Mitigation and
  Monitoring Program
• Mid-Coyote Baseline Fisheries Study
• Biotelemetry Fish Passage Study
• Vaki River Watcher
• County Wide Genetics Study (Steelhead and
  lamprey)

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SCVWD Genetic Study

• Background
• Federal Listing
• Evolutionarily Significant Unit
• Six designated ESUs in California

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SCVWD Genetic Study

• SCVWD Implications
• Mitigation and Monitoring Programs
• Management Plans
• Preserve
• Augment
• Restore

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SCVWD Genetic Study

• County Wide
• National Marine Fisheries Service

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Steelhead Genetics
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Any Questions or Comments?