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MetaData for Stream Habitat Conditions in Western Oregon 2005 Monitoring Report Report Number: OPSW-ODFW-2007-5
Stream Habitat Conditions in Western Oregon 2005 Monitoring Report Report Number: OPSW-ODFW-2007-5
Identification Information
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Citation
- Originator: Anlauf K.J., and K. Jones
- Publish Date: September 2007
- Online Link: None
- BPA Project #:
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Contact Information
- Agency: Oregon Department of Fish and Wildlife
- Name: Cedric Cooney
- Job Position: Natural Resources Data and Systems Manager
- Telephone: 503-947-6094
- E-Mail Address: cedric.x.cooney@odfw.oregon.gov
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Description
- Abstract: Monitoring programs under the Oregon Plan for Salmon and Watersheds were designed
to assess the status and trend in fish populations and aquatic habitat in Oregon’s coastal
basins. Although the Oregon Plan for Salmon and Watersheds was initiated in response to
the petition to list Oregon coastal coho salmon (Oncorhynchus kisutch) as threatened
under the Endangered Species Act (ESA), monitoring was subsequently expanded to
include other salmonids. Through coordinated surveys we are able to evaluate freshwater
habitat, fish distribution, and abundance of juvenile and adult coho salmon and steelhead
trout. The habitat survey project has the broadest geographic scope of inference and ties
to other program components as well – basin surveys, surveys at habitat restoration sites,
adult and juvenile coho surveys, and life cycle watersheds (Flitcroft et al. 2002).
The Oregon Plan facilitated cooperation and partnerships to study the contemporary life
history dynamics of coho salmon in the Oregon coastal ESU (Evolutionary Significant
Unit). A viability and status assessment of Oregon coastal Coho (Chilcote 2005) and the
Conservation Plan for the Oregon Coast Coho Evolutionary Significant Unit (Nicholas
2006) evaluated the relationship of aquatic habitat to the productivity of coho salmon
populations and recommended actions to promote recovery. The habitat portion of the
viability assessment was based on a review of aquatic and riparian habitat collected by
the Aquatic Inventories Project (ODFW) from 1990 to 2004 (Rodgers et al. 2005). The
authors of the habitat assessment (Rodgers et al 2005) and viability assessment (Chilcote
2005) concluded that coho productivity in 22 coastal coho populations was limited by the
complexity of stream habitat used by juvenile coho during their first winter of freshwater
residence.
The term “stream complexity” integrates geomorphic and structural characteristics of
streams and associated aquatic habitat. Complex geomorphic features may be observed
in low gradient streams flowing through wide valley floors with multiple channels and
off-channel habitats. Structural complexity refers to the size and configuration of pools,
large wood pieces and jams, substrate, and undercut banks. The combination of
geomorphic and structural features provides cover and refugia during high winter flows
for juvenile coho. Stream reaches that can or have the potential to create these conditions
are commonly located in lower reaches of moderate size streams in areas with wide
valley floors and are considered to contain high quality habitat for juvenile coho. Burnett
et al. (2007) developed spatial models to estimate high-quality habitat rearing potential,
termed intrinsic potential, in coastal streams. A stream’s intrinsic potential was modeled
using valley width, gradient, and stream flow. Historically, streams identified as having
high intrinsic potential may have been the most productive for juvenile coho salmon;
restoration of these reaches may be the key to recovery of coho salmon. The viability
assessment and Coho Plan recommend that we monitor the trends in total amount and
spatial distribution of these habitats in coastal drainages.
This report discusses the findings from aquatic habitat surveys conducted in summer
2005 in coastal drainages. Our objectives are to describe and compare channel
morphology, instream habitat and complexity, and riparian conditions in all wadeable
streams in five monitoring areas. The sample design permitted us to post stratify the
sample sites into three additional frames: sites within coho and steelhead distribution,
sites outside coho distribution, and sites within high intrinsic potential for coho. We also
used two habitat models to integrate habitat attributes to describe the habitat quality and
capacity for different life stages of juvenile coho and steelhead.
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- Purpose:
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- Time Period of Content:
- Geographic Extent: North Coast, Mid-Coast, Mid-South Coast, Umpqua, and South Coast
- Status: Final
- Use Constraints:
- Format: PDF File
Data Quality Information
- Lineage-Source:
Data Information
- No data information was supplied.
Entity and Attribute Information
- Attributes Description: Field attribute information is available in the attached file(s).
Is a physical copy maintained for reference at Headquarters?
No
Files
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2007-05.pdf
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Document File |
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