Saturday, October 15, 2011
Lake Eries' Toxic Algae Bloom Seen From Space
Lake Erie's Toxic Algae Bloom Seen From Space
Toxic algae is sucking the oxygen out of Lake Erie.
The lake is currently undergoing one of the worst algae blooms in decades, turning the water a scummy bright green. According to NASA, blooms like this did occur in the 1950's and 60's, but now phosphorus from farms, sewage, and industry have fertilized the waters.
After the 60's, increased regulations and improvements in agriculture and sewage treatment limited the phosphorus and helped to control the blooms. However, the shallower Western basin near Detroit has been more susceptible to the algae than other deeper areas.
The exact reason behind the bloom is a bit unclear, but scientists believe it could be linked to increased rainfall and, believe it or not, mussels. It seems the types of mussel, zebra and quagga that have invaded the lake feed on phytoplankton instead of algae, making it even easier for the blooms to occur, according to NASA.
While the algae doesn't directly kill fish, it's still not good. As the algae dies, it's broken down by bacteria which uses oxygen from the water. This oxygen removal creates areas where fish can't survive. In addition, if consumed, it can also create flu-like symptoms in people or even kill pets.
Former Vice President Al Gore spoke Thursday in Detroit on the matter, associating climate change with the algae problem. "We're still acting as if it's perfectly OK to use this thin-shelled atmosphere as an open sewer. It's not OK," he said. "We need to listen to the scientists. We need to use the tried and true method of using the best evidence, debating and discussing it, but not pretending that facts are not facts."
While in the past, some have criticized Gore, claiming that he's made exaggerated statements about the environment, yesterday's speech drew upon some pretty hard scientific evidence, leading many leaders at the International Joint Commission to listen a bit more intently.
This past summer, an algae bloom spread across a beach in China, dying everything in its path "a shocking bright green."
End of excerpt
Video of Al Gore's plenary speech at the Great Lakes Biennial
The conditions we see in Lake Erie now are a call to action. It is said that the condititons in Lake Erie usually dictate the future for the other four. After expending so much time and effort to make such inroads in cleaning up the mistakes of the past, it would be a true tragedy to see it all reversed.
Water levels in the lakes are important as well in regards to maintaining their health. Water levels have been down and with Lake Erie being the most shallow of them all, this too (water evaportation due to increasing temperatures) can have an effect on algae blooms as well as overflows due to less but more extreme rainfalls that move fertilizer downstream.