Thomas Creek Mainstem Assessment Completion Report

Identification Information

Citation

Originator: Russell Langshaw

Publish Date: March 9, 2003

Online Link: None

BPA Project #:

Contact Information

Agency: Watershed Councils

Name: Eric Hartstein

Job Position: Education Coordinator

Telephone: 541-367-5564

E-Mail Address: sswc@centurytel.net

Description

Abstract: This project expands upon a year 2000 project (OWEB 99-543) that was designed to examine riparian and water quality impacts on aquatic invertebrate assemblages and fish diet in Thomas Creek. The initial project design was to sample water quality, fish, and invertebrates at nine sites along 30 river kilometers (R kms) of the stream; three in conifer dominated, three in mixed forest, and three in hardwood dominated riparian forest. Preliminary results suggested water quality conditions were similar throughout the 30 R kms and riparian vegetation composition was not associated with fish diet or invertebrate assemblage composition. Longitudinal patterns were weak and appeared to be driven by three upstream sites. Therefore we proposed to expand the survey area to include the entire stream open to anadromous fish migration (51 R kms). The fish diet portion of the project was discontinued because we were denied a sampling permit for ESA listed salmonids during 2001. Instead, we focused on broad-scale fish distribution and habitat use. Additionally, we compared patterns for fish with invertebrates. The extent of fish, invertebrate, and water quality sampling locations increased to include all 51 R kms downstream of the waterfall. An extensive fish survey to examine fish distribution included 218 survey locations throughout the 51 R kms. Intensive snorkel surveys to examine fine-scale, habitat use by salmonids included four sample locations in the upstream 14 R kms. Invertebrate samples were collected from three habitat types at 27 sites to examine distribution and habitat use along the 51 R kms

Purpose:

Time Period of Content:

Geographic Extent: Thomas Creek

Status: Final

Use Constraints:

Format: MS Word

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Data Information

No data information was supplied.

Entity and Attribute Information

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Is a physical copy maintained for reference at Headquarters? Unknown