The ecological impacts of stream restoration: providing structures to assist beavers to aggrade an incised channel to benefit endangered steelhead Nick Bouwes and Nick Weber - Eco Logical Research, Inc., Providence, UT Joe Wheaton Florie Consolati Watershed Sciences Utah State University Logan UT Joe Wheaton , Florie Consolati - Watershed Sciences, Utah State University , Logan, UT Chris Jordan, Michael Pollock, Jason Hall - NOAA Fisheries Service, Northwest Science Carol Volk- South Fork Research, Inc. Made possible by BP A
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The ecological impacts of stream restoration: providing structures to assist beavers to
aggrade an incised channel to benefit endangered steelhead
Nick Bouwes and Nick Weber - Eco Logical Research, Inc., Providence, UT Joe Wheaton Florie Consolati Watershed Sciences Utah State University Logan UTJoe Wheaton , Florie Consolati - Watershed Sciences, Utah State University, Logan, UT Chris Jordan, Michael Pollock, Jason Hall - NOAA Fisheries Service, Northwest Science Carol Volk- South Fork Research, Inc.
Made possible by BPA
Mean Annual Flood Height
Post Depth60–90 cm
Post Lines
Different Flavors of BDSS Restoration
Reinforced Dams Wicker Weaves
20 m
BDS St tBDS Structure
Beaver dam support structures
Will steelhead respond to this restoration?
Treatment 2009Control/Trt 2014Long Term Control
M d C kMurderers Creek
Beaver dams
RaisedWater
BeaverRecruitment
LevelsVariable
WaterVelocity
Groundwater
Pools,Area
Decreased Dam
Failure
ForagingResting
Locations
Sediment SortingAggradation
GroundwaterRecharge
DecreasedStreamP
Increased base flowsLocalized Upwelling
Gravels for Spawningand concealment
ReconnectFloodplain
Power Localized UpwellingTemperature Heterogeneity
Production of O. mykiss of Bridge and Murderers (trt and cntrl)Pre‐restoration Post‐restoration
200
250
300
/100m
2 /season
)
50
100
150
Prod
uctio
n (Δg/
‐50
0
Fall
Winter
Summer Fall
Winter
Summer Fall
Winter
Summer Fall
Winter
Summer Fall
Winter
P
300
400
)
Difference in Production of Bridge and Murderers (trt ‐ cntrl)Average Ḋ‐pre and Ḋ‐post restoration (p=0.10)
Pre‐restoration Post‐restoration
2007 2008 2009 2010 2011 2012
100
200
uctio
n (trt‐cntrl)
Ḋ‐post
‐100
0
fference in Produ
Ḋ‐pre
‐200
Fall
Winter
Summer Fall
Winter
Summer Fall
Winter
Summer Fall
Winter
Summer Fall
Winter
Dif
2007 2008 2009 2010 2011 2012 2012
Conclusions• Increase in deeper pools• Increased ground water storage• Aggradation• Frequent inundation of the floodplain• Habitat complexity
– Topography– Velocity– Substrate – Temperatures
Conclusions• Increase in population abundance• Increase in survival (at multiple scales)Increase in survival (at multiple scales)• Decrease in growthI i t lh d d ti• Increase in steelhead production