Click here for more information about Algenuity
Click here for more information about Liqofluxphenometrics515R1
Visit cricatalyst.com!Evodos Separation Technology

Research

Studying year-round cyanotoxins in North Carolina

March 18, 2018 — by Tracey Peake
AlgaeIndustryMagazine.com

Mixed freshwater algal assemblage. The long filaments are cyanobacteria.

Using two different measurement methods, researchers from North Carolina State University conducted a two-year study of North Carolina’s Jordan Lake in which they monitored toxic algal blooms. The researchers found that multiple cyanotoxins from toxic algal blooms are present year-round, albeit in very low concentrations. Their findings could improve the ability to predict toxic blooms.

Freshwater algal blooms have increased due to nutrients from sources such as fertilizers and other agricultural runoff entering the water. While every algal bloom isn’t toxic – some algal species can produce both toxic and nontoxic blooms – toxic blooms can cause problems for swimmers and other recreational users in the form of rashes or allergic reactions.

“We’ve confirmed both that the toxins are there year-round and that multiple toxins are there simultaneously but in very low levels,” says Astrid Schnetzer, associate professor of marine, earth and atmospheric sciences at NC State and corresponding author of a paper describing the research. “First, let’s be clear that the presence of the toxins doesn’t affect drinking water – treatment plants scrub all of that out. Secondly, the amounts of toxins we did find are about an order of magnitude below safe levels, so that’s also good news.”

Dr. Schnetzer and former NC State graduate student Daniel Wiltsie wanted to know which cyanotoxins were present in Jordan Lake, a major drinking water reservoir in central North Carolina.

From 2014-16 Dr. Schnetzer and Mr. Wiltsie sampled the lake water in two ways: by taking discrete samples (in which water is collected in a container) and by using solid phase adsorption toxin tracking (SPATT) bags, which are left in the water for a period of days or weeks. SPATT bags contain an absorbent resin that captures dissolved toxins. “By using two methods we were better able to determine what the concentrations looked like over time,” Dr. Schnetzer says. “Algal blooms are ephemeral, so it’s possible to completely miss them if you only look at discrete sampling. SPATT bags give you data on how the toxins can accumulate and overlap.”

The researchers analyzed the samples for five different toxins, and found four of them: microsystin, anatoxin-a, clindrospermopsin, and β-N-methylamino-L-alanine (BMAA). Multiple toxins were detected at 86 percent of the sampling sites and during 44 percent of the sampling events.

“This study is the first to use both SPATT bags and sampling to assess the toxins in the water,” Dr. Schnetzer says. “It’s a first step toward creating better informed approaches to really understanding the frequency and magnitude of these blooms.

“In the future, we want to have a better predictive capability regarding these blooms, as well as the ability to identify new emerging toxins. The data may also help us determine risk from chronic low-level exposures, as well as tease out what risks derive from exposure to multiple toxins at once.”

The research appears in Toxins and was supported through funds from the Urban Water Consortium/Water Resources Research Institute (grant 16-11-U) and North Carolina Sea Grant (5104348). Dr. Schnetzer is corresponding author and Mr. Wiltsie is first author. The study was made possible through a partnership with Jason Green, Mark Vander Borgh and Elizabeth Fensin from the N.C. Department of Environmental Quality’s Division of Water Resources.

More Like This…

Copyright ©2010-2018 AlgaeIndustryMagazine.com. All rights reserved. Permission required to reprint this article in its entirety. Must include copyright statement and live hyperlinks. Contact editorial@algaeindustrymagazine.com. A.I.M. accepts unsolicited manuscripts for consideration, and takes no responsibility for the validity of claims made in submitted editorial.

twittertopbarlinks_eventstopbarlinks_requesttopbarlinks_archives

From The A.I.M. Archives

— Refresh Page for More Choices
Algatech has announced the opening of Algatech Inc., a New York City-based subsidiary created to serve the North American market. The company has appointed Ken Seguine to...
WesTech Engineering, Inc. and Utah State University’s Sustainable Waste-to-Bioproducts Engineering Center (SWBEC) are jointly engaged in developing processes for more eff...
Carlsbad-based Surftech, a stand-up paddle (SUP) and Surfboard manufacturing company has announced its collaboration with BLOOM, a materials development company, to devel...
A Bay Area company has patented a group of three single-celled, algae-like organisms that, when grown together, can produce high quantities of sugar just right for making...
Colorado State University scientists and Arizona State University’s Arizona Center for Algae Technology and Innovation are partners in a three-year grant of up to $3.5 mi...
Malaysia-based Algaetech International, a pioneer algae technology company specializing in R&D, as well as production and commercialization of algae-derived high valu...
Trade Arabia reports that the Oman Centre for Marine Biotechnology (OCMB) recently signed a memorandum of understanding with Swedish Algae Factory to support the domestic...
The Natural Algae Astaxanthin Association (NAXA), headquartered in Spring, Texas, has announced that Chile-based Atacama Bio is its newest executive member. Atacama Bio h...
At the Technical University of Denmark (DTU), Science Nordic.com reports, researchers are investigating bioluminescent algae, to determine whether bioluminescent organism...
Global EcoPower (GEP), of Aix-en-Provence, France, has signed a 5-year partnership contract with the French Alternative Energies and Atomic Energy Commission (CEA). This ...
Amy Thompson writes in Space.com that SpaceX successfully launched its 15th Space Station cargo-resupply mission on Friday, June 29; carrying a payload of experiments des...
Sophie Kevany writes in Decanter.com that a group of vineyards in France’s Bordeaux and Cognac regions are exploring whether algae can be used to prevent the fungal infec...