Source: Charles Darwin Foundation
An
unwelcome visitor is skirting the borders of the Galapagos Marine
Reserve (GMR): iron dust. Why would one of the most important World
Heritage Sites be facing this? Planktos, Inc., a for-profit
eco-restoration company based in San Francisco, US, has chosen the
international waters near the Galapagos Islands to experiment seeding
the oceans with iron dust.
The Charles
Darwin Foundation (CDF) is alarmed about this activity because of the
unknown effects it could have on marine life and other ecosystems in
Galapagos. Since Planktos, Inc's experiment does not have an
Evironmental Impact Assessment (EIA), which guarantees that no harm
will be done to the GMR, CDF expresses its worry for this unnecessary
and risky bet.
According to a document
released by the US International Maritime Organisation on 1st June, the
experiments will begin in late June 2007. The same document states that
Planktos, Inc. will not use the Weatherbird II, a United
States' flagged vessel, nor will the chosen ship leave from US shores
as originally planned to avoid being subject to the United States Ocean
Dumping Act.
Planktos, Inc intends to seed
the oceans with the iron dust to stimulate phytoplankton blooms, the
microscopic marine plants that soak up the energy of the sun to convert
carbon dioxide in organic matter, and in that way supposedly revert the
global warming.
This activity of great
concern to the CDF also worries the international scientific community
because the potential environmental impacts of the project are unknown.
"The 'iron hypothesis' was first suggested by John Martin, an
oceanographer at the Moss Landing Marine Laboratory in California, who
died before his idea could be properly tested", said the British
newspaper The Independent on May 3rd, 2007.
Stuart
Banks, an oceanographer with the CDF, is worried about how the unique
ocean current system influencing Galapagos could move the iron dust
into and around the GMR. Said Banks, "Surface flow would transport most
of the surface iron initially to the west. Although a proportion would
be metabolized rapidly by surface blooms pushing eastwards, a
proportion may sink and return to the reserve in the opposing
equatorial undercurrent or via the north ecuatorial current in the
surface, then back down through Galapagos".
Unknown
effects could come into play upon normal microbial processes and create
possible toxic effects upon fish and other animals living in the open
seas rather than exclusively near land. The phytoplankton/zooplankton
groups at the dust release site could be damaged as well. Another fear
is that the presence of iron dust could imbalance the natural oxygen's
amount into the water, causing serious problems to some marine life.
"Isolated
iron dust seeding will probably generate short-lived phytoplankton
blooms that are ineffective given their objective to improve CO2
sequestration in deep water. Just constitutive release of trace iron as
found with natural processes such as along shore, or wind-driven
upwelling support high productivity systems over time", according to
Banks.
CDF researchers fear that large
events offshore potentially may deplete nitrates and phosphates,
otherwise metabolised where those natural upwelling processes (and
their dependant communities) occur, causing imbalance and impoverished
systems in other places.
Is it worth the
risk to be experimenting with one of nature's greatest and
best-preserved treasures? The CDF believes that without an
environmental impact assessment to validate this experiment so close to
Galapagos there is more to lose than to gain. On a global scale the
answer to global warming is to review how, as individuals and nations,
we can be more carbon-neutral and not expect the oceans to solve the
problems for us.