2009 Tenmile Lakes Algae Final Report

Identification Information

Citation

Originator: Tenmile Lakes Basin Partnership

Publish Date: 4/2010-7/2010

Online Link: None

BPA Project #:

Contact Information

Agency: Watershed Councils

Name: Jason Frederickson

Job Position: Monitoring Coordinator

Telephone: (541)759-2414

E-Mail Address: tlbp@presys.com

Description

Abstract: Long-term public health monitoring for potentially toxigenic cyanobacteria (blue-green algae) in Tenmile Lakes has occurred since 2002 (Kann 2008; Jacoby and Kann 2007). Tenmile Lakes were again sampled in 2009 to assess the dynamics of potentially toxic blue-green algal species, including Microcystis aeruginosa, Gloeotrichia echinulata, and various Anabaena species. Microcystis and Gloeotrichia can produce hepatotoxins (known as microcystins), and Anabaena produces both neurotoxins (anatoxin-a) and microcystins. Both toxins are capable of harmful effects to animals and humans (Chorus and Bartram 1999). A toxic bloom of M. aeruginosa was first documented in Tenmile Lakes in September of 1997, prompting the Oregon Department of Health to issue a health advisory recommending that the lakes not be used for drinking water (numerous private homes around the lakes utilize treated lake water for potable purposes) and that contact recreation be avoided (Kann and Gilroy 1997). The goal of 2009 sampling, performed by the Tenmile Lakes Basin Partnership, was to determine presence and cell density of these potentially toxic species at a limited number of sampling stations. Cell density of potentially toxigenic species was then compared to drinking water guidance levels for lakes and reservoirs (e.g., Yoo et al. 1995; Chorus and Bartram 1999), as well as State of Oregon recreational guideline values (Oregon DHS 2009; Stone and Bress 2007).

Purpose:

Time Period of Content:

Geographic Extent: Southern Oregon Coast, Tenmile Lakes

Status: Final

Use Constraints:

Format: PDF

Data Quality Information

Lineage-Source:

Data Information

No data information was supplied.

Entity and Attribute Information

Attributes Description: 2009 Tenmile HAB Sampling Summary

Is a physical copy maintained for reference at Headquarters? Unknown