Climate Hacking Scheme Could Load the Ocean With Neurotoxins
By Andrew Moseman | DiscoverMagazine.com
Of all the planet hacking possibilities floated as last-minute ways to stave off a climate catastrophe (building a solar shade for the Earth, injecting the atmosphere with sunlight-reflecting aerosols, etc.), iron seeding seems one of the more practical and feasible ideas. The scheme calls for the fertilization of patches of ocean with iron to spur blooms of plankton, which eventually die, sink, and sequester carbon at the seafloor.
Twelve small experiments over the last decade in several ocean locations (red dots) consistently showed that intentionally adding iron results in phytoplankton blooms. (Data courtesy of NASA SeaWiFS Project.)
However, worries over the consequences of tinkering with the ocean ecosystem have held up plans to attempt this. And now, in a study in the Proceedings of the National Academy of Sciences, researchers claim that such a plan could risk putting a neurotoxin into the food chain.
Iron seeders have targeted the large swaths of ocean surface with high levels of nitrate and low chlorophyll, where an injection of iron could potentially turn a dearth of plankton into a bloom. But too many phytoplankton can be a bad thing, especially when it comes to members of the genus Pseudonitzschia. This alga produces domoic acid, which it spews into the surrounding seawater to help it ingest iron [ScienceNOW].
Sea lions off California have gotten sick from the toxin. In Canada, three people died in the 1980s from eating shellfish that themselves had eaten Pseudonitzschia.
Seeding experiments—about a dozen have taken place so far—had not shown the production of domoic acid. But oceanographer Charles Trick was not convinced, because those previous tests had harvested the plankton in the ocean but not tested them until the researchers returned to shore. So, for their study, the researchers examined water samples taken from open-ocean tracts in the sub-Arctic North Pacific Ocean where iron-fertilization experiments were conducted [AFP]. The results were not encouraging.
Pseudonitzschia collected in midocean and subjected to shipboard experiments produced plenty of domoic acid. “We found there is a lot of toxin out there,” he said. “If we were to seed with iron, the amount of toxin would go up” [The New York Times]. In fact, Trick says, the concentration of Pseudonitzschia doubled, which increased how much domoic acid was in the water. In turn, the preponderance of the acid allows more Pseudonitzschia to grow, in a sort of feedback circle.
Trick says he doesn’t think the acid would make it all the way up the food chain to people, though birds might ingest it. But, he says, this is another sign that tinkering on the planetary scale can be fraught with unintended consequences.
The brilliant swirls of green and blue in the midst of the deep, blue Atlantic Ocean off Argentina were created by multitudes of tiny marine plants (phytoplankton) that draw carbon dioxide from the atmosphere to grow. Intentionally adding iron to the ocean would fertilize more phytoplankton blooms. Could this help reduce the buildup of greenhouse gases? (Image courtesy of NASA)
Phytoplankton blooms draw down carbon dioxide from the atmosphere. They are eaten by zookplankton, which produce pellets and aggregates of carbon-containing fecal matter (above), which sink into the depths, where the carbon can be sequestered from the atmosphere. How much carbon would actually be sequestered via ocean iron fertilization is an open question.
Article from: DiscoverMagazine.com
Fertilizing the Ocean with Iron
EPA has Announced that Greenhouse Gases are a Danger to Human Health
75 Reasons to be Skeptical of "Global Warming"
Climategate U-turn as scientist at centre of row admits: There has been no global warming since 1995
The war over ’Snowmageddon’ Global warming, huh?
NASA Global Warming Alarmist Endorses Book That Calls For Mass Genocide
John Coleman’s hourlong news special “Global Warming – The Other Side”
Big freeze could signal global warming ’pause’ (Nice recovery!)
U.K. Citizens Wish Global Warming was True (Video)
The Church of Global Warming
Leading Global Warming Crusader: Cap and Trade May INCREASE CO2 Emissions
Former UN Environmental Advisor, Peter Taylor, gives a brief discussion about solar cycles and climate science. (Video)
Latest News from our Front Page
Immigrants in Hungary Head to German Border on Government Buses and Walking on Foot
Footage showed migrants — frustrated with the Hungarian authorities, who have blocked their way by rail — starting the walk from Budapest toward Germany. Others remained in a standoff with the police.
Budapest - After a day of defiance by increasingly desperate refugees, the government of Hungary metaphorically threw up its hands Friday and offered to bus thousands of migrants to ...
Generation P. Russia awaken!
From Youtube description: The first Russian cult film of the new millenium
Watch a preview here:
Blonde Parade in Latvia
Youtube description: Hundreds of blonde Latvian women marched through the streets of Riga to to lift nation's economy.
Shocking: Young Girls Convulse On The Floor After HPV Shot
Video appears to show widespread adverse reaction to Gardasil vaccine
Shocking video posted to Facebook shows a group of young girls convulsing on the floor after reportedly taking the Gardisil vaccine somewhere in Bolivia.
White Women Are Getting Fed Up
White women speak out against the claim that "White women have things so much easier than every other people."
This video has been flagged as "inappropriate" by Youtube:
Don't miss the Radio 3Fourteen interview with Lana, Sinead and Megan.
|More News » |