Identifying the Source of Unknown Microcystin Genes in Cyanobacterial Cells

Microcystin-producing cyanobacteria are common nuisance organisms in harmful algal blooms in freshwaters around the world. This ground breaking work lead by the Department of Microbiology, University of Tennessee provides a detailed analysis of the genetic diversity within microcystin producing cyanobacteria.   Molecular tools offer an advantage over more traditional chemical measures of toxin concentration, as they may serve as a predictor of potential bloom events to come (while toxin measurements suggest that the event, and potential exposures, have already occurred).

To read the full read the abstract published by the American Society of Microbiology, follow this link – “Identifying the Source of Unknown Microcystin Genes and Predicting Microcystin Variants by Comparing Genes within Uncultured Cyanobacterial Cells

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Filed under Cyano Information, Water Quality

Detailed SolarBee Presentation

SolarBee® made a presentation entitled “Potential Benefits of Solar-powered Circulation for Lake Cochituate, with an Emphasis on Controlling Eurasian Watermilfoil” which was created by Christopher F. Knud-Hansen, Ph.D., CLM Chief Limnologist for SolarBee, Inc.

This presentation  is available at http://www.millermicro.com/SolarBeeLCtalk060323.pdf

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No SolarBees Newsletter is Here…

No SolarBees has taken the next step in helping, the Lake Front resident of Devils Lake stay informed and up to date.  

We have employed the services of a popular email service to help us create and manage an occasional email newsletter to interested parties.  Follow this link or the link located in the sidebar in order to sign up or manage your preferences for this service.  We take your privacy seriously and will not share your email address.  You may opt out at anytime at the same link.



Previous newsletters are archived and available via the link in the Email Newsletter section in the sidebar. Please let your friends neighbors know about the availability of our newsletter and ask them to sign up to easily stay current. It is our hope that you will find this service informative and we look forward to serving you in the future.

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Algae Stink No Health Risk In Oso Reservoir

In June of 2008 the Santa Margarita Water District replaced a bubbler aeration system with four SolarBees on Oso Reservoir in Mission Viejo Califorina. The OC Register reported on November 2, 2009 that a “foul odor sniffed by residents of Mission Viejo and Rancho Santa Margarita since Wednesday”… “The stench is the result of an algae bloom in the Upper Oso Reservoir sparked by Wednesday’s cold weather and high winds, said Dan Ferons, chief engineer for the water district.”

OSO Bloom

Dead fish line the shore of the the Upper Oso Reservoir - LEONARD ORTIZ, THE ORANGE COUNTY

The water district has taken several steps to bring oxygen levels back to normal and eliminate the odor. Mechanical aeration equipment has been used since Friday to pump air to the bottom of the reservoir. Four solar-powered pumps known as SolarBees have continued to aerate the water.

On Saturday, the water district started pumping fresh water into the lake at the rate of 200 gallons per minute; today, the rate was increased to 1,500 gallons per minute. Two boats were being used today to generate waves in order to spur oxygen intake at the surface. An external pump was also being used today to aerate the water. The water district is also considering use of a mechanical device to pump ozone, whose molecules include three atoms of oxygen, into the lake.

For more information visit the orginal articles in the OC Register.

Algae stink no health risk for south O.C., official says

New solar technology keeps water clean

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Filed under Algae Bloom, Performance, Solarbees, Water Quality

Attend the November DLWID Board Meeting

The Devils Lake Water Improvement District Board meeting will be held in its offices above Radio Shack Thursday November 5th at 6:00pm. The best way stay informed is for all lake front homeowners and interested parties to attend these important meetings.

There are several interesting items on the agenda including a discussion about the board appointment process.  DLWID now has a opening on their board, interested parties should visit www.dlwid.org for details. Interviews for this board opening will occur at the December board meeting.  Based on recommendations from the Communications Committe the district is investigating the use of various email list services which will be reviewed at the meeting.  Earlier in the year DLWID was solicited by Oregon Sea Grant about hosting a low powered radio station for invasive species information dissemination which will be discussed.  Paul Robertson attend the North American Lake Management Society meeting in Hartford CT and will provide a report to the board.

Follow this link to download the Meeting Agenda and Manager’s Report.  Highlights for the balance of the meeting  include;

  • Boat House/Docks
  • Land-use Complaints
  • Lake Level
  • The Devils Lake Plan
  • DEQ 319 Grant
  • Native Vegetation
  • Whole Lake Circulation
  • Septic Tank Revitalization Program
  • Save our Shoreline Campaign
  • Financial Oversight Committee Report
  • Communications Committee Report
  • Safety Report
  • Water Quality Update
  • Nutrient Budget RFP
  •  

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Filed under DLWID, Meeting Announcements

Update on Blue Lake

Source: November DLWID Management Report – Paul Robertson



Blue Lake which has had 3 Solar Bee units installed since 2007 recently had a cyanobacteria bloom that caused a DHS toxin warning. A new property owner on the lake coincidentally called us thinking we had SolarBees on Devils Lake and he wanted to talk about management strategies. Through our conversation it mentioned that in fact a few weeks prior the lake did turn really green, as if green oil had been spilt. He said that it he went waterskiing since, and that it had cleared up. He estimated that it lasted approximately 2 weeks at most. I also solicited information from Joe Eilers at SolarBee who sent this email reply:

Basically, we think the bloom was initiated by a major influx of high- P water. Blue Lake has no surface inlets and loses water from evaporation through the summer. The homeowners like to have Metro request inputs of water from their back-up production wells near the lake. Around the end of August they added about 8% of the lake volume with groundwater containing about 90 ug/L PO4. That coincided with the Anabaena getting going about 10 days later. The in Sept, the lake turned over, releasing another pulse of high-P water. Anyway, we are trying to get the water quality data from Metro so we can better determine the timelines and the lake response. As soon as we have that, I’ll dive into the data and try to sort things out. Joe

Jack Strayer initiated contact with Elaine Stewart, of METRO regarding Blue Lake. She is willing to send their findings once they complete them. I have had two phone attempts at getting a preview of such findings, and anticipate a call back.

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Filed under Algae Bloom, Performance, Solarbees, Water Quality

Blue-green Algae Alert Issued for Blue Lake

In April of this year Metro approved the purchase of 3 SolarBees® for permanent placement on Blue Lake.  The units had been in continuous operation for the previous 24 month during a trial on the Lake.  The Oregonian recently reported …

By Lynne Terry, The Oregonian

October 14, 2009, 5:04PM

This is not a good time to go for a brisk swim in Blue Lake east of Portland — and not just because of the weather.

The popular lake on Northeast Marine Drive is contaminated with toxins.

Recent tests show that the lake, which draws 300,000 people a year, has dangerous levels of blue-green algae.

Scott Paskill,  manager of the area for Metro, the regional agency that manages part of the lake, said the lake was covered with a scum a few days ago but he said that conditions appear to be improving.

Officials have posted signs around the lake, warning people to stay away from the water and not to fish.

Blue-green algae flourish in warm weather and also when the seasons change, producing toxins that can contaminate fish and the water.

It is dangerous to eat shellfish or crayfish from tainted water, and officials recommend that the fat, skin and organs be removed from other fish before eating.

Contaminated water can irritate the skin as well and cause nausea, diarrhea and even liver damage. Children and pets are especially susceptible.

In August, high blue-green algae levels in Elk Creek in southern Oregon killed as many as four dogs, which suffered convulsions and died quickly after frolicking in the water during visits with their owners.

Paskill is not concerned about that happening at Blue Lake.

“We don’t allow pets in the park,” he said, “and no one is using the park right now.”

A month or two ago, when the weather was warmer, it would have been a different story.

Covering 64 acres,  the lake is a popular fishing and swimming spot in summer for Portland-area residents.

Still, about 300 people live in the Fairview neighborhood, about 15 miles from downtown Portland. Paskill said they have been informed about the algae.

“It’s not like it’s the middle of summer,” he said, “but we do have to notify the public.”

For more information, call the state’s harmful algae program at 971-673-0400 or visit this Web page: http://www.oregon.gov/DHS/ph/hab.

— Lynne Terry

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Filed under Algae Bloom, Performance, Solarbees, Water Quality