Showing posts with label algal blooms. Show all posts
Showing posts with label algal blooms. Show all posts

Thursday, August 6, 2015

#LakeErie joins the list of more bodies of #water to avoid! - http://clapway.com/2015/08/06/life-threatening-algae-in-lake-erie-354/

Satellite images of Lake Erie show enormous plumes of green, spiraling and spreading its way throughout its waters. According to recent studies, these dark green clouds are actually the result of an algal bloom (a sudden and exponential increase in an algae population). Samples taken of the algae in Lake Erie have been indicating record-breaking amounts, in what scientists believe to be the biggest and most deadly algal bloom ever recorded in the fourth-largest Great Lake, threatening the safety of the surrounding Northeast’s water supply, marine life, and citizens.


The Great Green Lake


The National Oceanic and Atmospheric Administration (NOAA) has released disturbing satellite images recently of what they expect to soon become the largest and most deadly algal bloom in Lake Erie to date, beating 2011’s previous record. The algae in Lake Erie is made up of cyanobacteria—a type of bacteria that thrives in warm water environments. With this past July having been the hottest month ever recorded , it is no wonder that Lake Erie has become swamped with the toxic bacteria.


An Erie Toxin


Blue and green algal blooms such as the cyanobacteria in Lake Erie produce an extremely dangerous chemical called mycrocystin, which has been known to kill mass amounts of marine life, as well as cause severe and sometimes fatal symptoms in humans. If accidentally drank through tap water, or eaten with contaminated food, extreme symptoms such as nausea, diarrhea and liver damage have been known to arise. And if you’re thinking of simply boiling the bacteria out of your water or seafood, think again—the warmer the water, the more cyanobacteria thrive, meaning you’ll only be making the situation worse.


Due to these circumstances, the Ohio Department of Health was forced to issue an official warning concerning the dangers of the algae in Lake Erie—a hugely famous lake for tourism and recreation. Officials warned against any interaction with water from the lake, as any form of contact with it could cause anything from skin rashes to hives, vomiting, and neurological failure.


Is This Our Fault?


According to the Ohio Environmental Protection Agency, yes–the deadly increase of algae in Lake Erie is mostly caused by human intervention, and could have been easily prevented, provided officials took the matter more seriously.


Cyanobacteria thrive in still, warm waters—especially those in which excess nutrients are present. Lake Erie has long been a dumping ground for excess nutrients, as farm and factory runoff sends enormous amounts of phosphorus and nitrogen to its waters every year. The vast majority of these nutrients come from fertilizers, animal manure, power plant emissions and septic tanks in the areas surrounding the lake. This, coupled with rising temperatures on a global scale provide just the right conditions for the deadly growth of algae in Lake Erie.


The State of Ohio is currently working on a deal that would reduce the amount of nutrients carried to the lake by farm and factory runoff statewide.



 


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Life-Threatening Algae in Lake Erie

Sunday, May 31, 2015

US: Scientists Discover Cause of Deaths of Hundreds of Turtles in Long Island, New York - http://clapway.com/2015/05/31/us-scientists-discover-cause-of-deaths-of-hundreds-of-turtles-in-long-island-new-york-123/

Scientists believe that they have finally solved the mystery surrounding the deaths of hundreds of turtles that washed up on shore in Long Island, New York. Hundreds of Diamond Back Terrapin washed onto the shore this past week leaving experts baffled as to what could have caused the death of so many of the small turtles, and citizens panicked about what a mass death of turtles like this could mean for their health and the health of the residents of Long Island.


Research leads experts to believe saxitocin is the cause


Upon examining the bodies of many of the dead creatures which were found in shockingly pristine condition, saxitoxin levels were found to be off the charts in the deceased turtles. Saxitoxin is a toxin found in shellfish, which rarely causes death in humans, but has proven to be fatal to the turtles washing up on the shore. The turtles are ingesting shellfish and other small organisms that are carrying the toxin, and it’s killing them because their bodies cannot withstand the effects of the toxins.


US- Scientists Discover Cause of Deaths of Hundreds of Turtles in Long Island, New York - Clapway


Origin of the toxins found in the turtles


Many experts believe that the toxin is found in the shell fish due to an increase in algae blooms which is the typical cause of the introduction of saxitoxin to the ecosystem. The shellfish in the water are consuming the algae in bloom, and the turtles are subsequently consuming the algae causing them to die off in high numbers.


An increase in algae blooms, and even small numbers of saxitoxin increasing are not uncommon. Although they are not usually seen to increase production to levels high enough to cause a mass die off such as this one. Experts are looking into the causes of the bloom which caused the deaths of hundreds of the turtles. Incidents like this are often attriuted to global warming, or other environmental changes causing massive disruption.


Ecosystems are especially fragile structures in which organisms rely on each other to maintain balance, but when a poison is introduced at the basic levels of the ecosystem dramatic changes can occur, and entire species can even be lost. While it was hundreds of unfortunate turtles who washed up on the shore, any species could feel the repercussions of the saxitoxin that contains the shellfish as part of their food chain.



US: Scientists Discover Cause of Deaths of Hundreds of Turtles in Long Island, New York