Microcystin Toxin in Fish and Freshwater Mussels

Background:

In an effort to better inform the public and tribal communities regarding potentially toxic algae (cyanobacteria) blooms, and toxins affecting fish and freshwater mussels, the Klamath Basin Monitoring Program has developed an on-line interactive map for tracking blue-green algae and toxins throughout the Klamath Basin. This work is supported by  the Public Health component of the Klamath Hydroelectric Settlement Agreement (KHSA)  funded by PacifiCorp. The public health monitoring region encompasses the mainstem Klamath River from Link Dam in Oregon to the estuary, in California including several mainstem tributaries. The monitoring is part of a multi-agency effort by the Bureau of Reclamation, PacifiCorp, Karuk, and Yurok Tribes to provide data on cyanobacteria and related toxins to support public health decisions.

During the summer months in the Klamath Basin blooms of toxigenic algae (Microcystis aeruginosa) and other related species of algae (Aphanizomenon flos-aquae, Anabaena flos-aquae, and Oscillatoria sp.) are common in Copco and Iron Gate Reservoirs. M. aeruginosa produces a toxin, microcystin, a hepatotoxin which affects the liver. The toxigenic algae has been documented hundreds of miles downstream and in some years is found near the mouth of the Klamath River. Large blooms of M. aeruginosa create surface scums which may cover the entire surface of a waterbody (For a detailed map of monitoring locations and bloom conditions, please refer to the Blue-green Algae Tracker). Organisms such as fresh water mussels and yellow perch can ingest M. aeruginosa and there is the potential that the toxin can bioaccumulate in the tissue.

Freshwater Mussels

In 2007 and 2009, the Karuk and Yurok Tribes conducted tissue analysis of fresh water mussels collected from the Klamath River mainstem. The results indicated a seasonal pattern of microcystin congeners beginning in July and persisting through December. In 2009 levels of microcystin congeners found in fresh water mussels frequently exceed the lifetime* total daily intake for a child weighing 22 pounds. In some cases, a single meal of fresh water mussels posed an acute* exceedance of toxin. The 2009, study also revealed that, while concentrations of microcystin in the water column were below levels of concern, substantial microcystin bioaccumulation occurred at all study locations. The results of this study, partially funded by the KHSA monitoring, suggest that consumption of freshwater mussels from the Klamath River mainstem should be exercised with extreme caution. 

 


For more information please refer to the following report:

*Acute Total Intake (250 ppb): single exposure event (e.g. week-end fishing trip). Seasonal Total Daily Intake (40 ppb): ongoing, “daily” exposure for several weeks during the cyanobacterial season. Lifetime Total Daily Intake (4 ppb): ongoing “daily” exposure for many months in settings where microcystin-producing cyanobacteria proliferate perennially.

Fish Tissue

In contrast to fresh water mussels, yellow perch sampled in Copco and Iron Gate Reservoirs in 2009 had no detectable levels of microcystin.  However, the results from yellow perch sampled from Copco and Iron Gate Reservoirs have varied for microcystin over the past few years. Sampling conducted in the summer of 2007, found levels of microcystin in yellow perch fish tissue collected from Copco and Iron Gate reservoirs, exceeding the advisory level of 26 nanograms total microcystin/gram tissue. In 2008 PacifiCorp sampled yellow perch and crappie from Iron Gate and Copco Reservoirs, and rainbow trout from the Klamath River before, during, and after the bloom season; all tissue samples were non-detect for microcystin.

The presence of microcystin in fish tissue remains a health concern for the public and tribal communities. 

It has been proposed that the 2010 tissue sampling include salmon and steelhead liver and fillet samples from sampling locations on the mainstem Klamath, spanning the estuary to the hatchery. However, due to the unseasonably cool temperatures and late rains, the bloom is off to a slow start. 

Fish and Shellfish Tracker - Beta

The Fish and Shellfish Tracker current contains data from 2009. We plan to expand the Tracker and more data becomes available.

How to use the Tracker

Select a Matrix and Sampling Date and scroll down to select the desired location, click on the location name. The tracker will automatically navigate to the region of interest. Click on the balloon to see a graph of the cell counts and toxin level for that location

 

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Klamath Hydroelectric Settlement Agreement Monitoring

Background

On November 13, 2008, the United States, the states of California and Oregon, and PacifiCorp executed an Agreement in Principle (AIP) describing a framework for possible removal of several PacifiCorp's dams on the Klamath River. Interim Measure 12 of the AIP stipulated a water quality monitoring program, including on-going monitoring of blue-green algae (cyanobacteria) and associated toxins. Water quality monitoring conducted in 2009 was conducted under the plan: AIP Interim Measure 12: Water Quality Monitoring Activities, Monitoring Year 2009.

The Klamath Hydroelectric Settlement Agreement (KHSA) signed on February 18, 2010, supersedes the AIP. Interim Measure 15 of KHSA states that PacifiCorp shall fund long-term baseline water quality monitoring to support dam removal, nutrient removal, and permitting studies, and also will fund blue-green algae (BGA) and BGA toxin monitoring as necessary to protect public health. PacifiCorp will provide funding of $500,000 per year for this measure, and that monitoring will be performed by an entity or entities agreed upon by the parties to the KHSA and in consultation with the appropriate water quality agencies. The funding provided by PacifiCorp under Interim Measure 15 is not intended to replace existing funding for ongoing monitoring efforts by other parties and programs, but is intended to coordinate PacifiCorp's monitoring efforts with other ongoing monitoring efforts, and to involve the KHSA signatories (Parties) and the responsible water quality agencies in this coordination. Monitoring will be performed by the Parties within their areas of regulatory compliance or Tribal responsibility, or alternatively, by an entity or entities agreed upon by the Parties and in consultation with the appropriate water quality agencies.

Objectives

  • Provide data on cyanobacteria and related toxins in a timely manner to support public health decisions.
  • Support the science in the dam removal framework.
  • Improve the current understanding of seasonal, annual, and long-term variations in a wide range of water quality parameters for Klamath River from Link Dam to the estuary. A system wide approach is necessary because influences from upstream sources extend downstream.
  • Form a long-term program that help capture the effects of other activities in the system potentially affecting water quality in the Klamath River, regulatory actions (e.g., Biological Opinions, adjudications, etc.), potential climate change impacts, fires, and land use activities, as well as other factors.
  • Provide a long-term baseline data set of water quality conditions that can be readily extended to assess impacts of management actions and restoration processes, including:
  • Clearly identifying current conditions for a wide range of hydrology, meteorology, and water quality conditions.
  • Identifying and quantifying potential water quality changes, impacts, and implementation measures.
  • Determining progress towards restoration of the river system and evaluation of possible mitigation measures to minimize long term impacts or promote/accelerate recovery
  • Collect data under a consistent Quality Assurance (QA) framework
  • Disseminate data in a timely fashion.

Final Reports

Klamath River Baseline Water Quality Sampling - 2010 Annual Report

Klamath River Baseline Water Quality Sampling - 2009 Annual Report

Monitoring Plans and Other Documents

KHSA Monitoring Plan 2011

Special Study - Periphyton Study 2011

Cyanobacteria SOP

QA Comparison Tables - 2010

Lab Cross Comparison - 2010

Lab Cross Comparison - 2009

Final Data

KHSA Water Quality Monitoring Data - 2010

KHSA Water Quality Monitoring Data - 2009

Provisional Data

Please contact contributing agencies regarding terms of use. Additional data are available, see link at bottom of page.

Yurok KHSA Data 2010

Karuk KHSA Data 2010

SONDE Data: Salmon, Scott, Shasta, Seiad Valley, Orleans

U. S. Bureau of Reclamation 2010

PacifiCorp 2010

Contacts

Please contact the following individuals regarding additional data and terms of use.

Yurok Tribe - This e-mail address is being protected from spambots. You need JavaScript enabled to view it  

Kaurk Tribe - This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Bureau of Reclamation - This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Pacificorp - This e-mail address is being protected from spambots. You need JavaScript enabled to view it

KBMP Member Reports and Additional Data

Available HERE