Qui di seguito trovate tutti i dati bibliografici a sostegno dell'opera di carbon sink di Blue Valley srl.
While widespread wetland destruction could unleash the mother of all "carbon bombs,"
scientists are discovering that the restoration of these vulnerable ecosystems could
provide a valuable bulwark to climate change by creating a worldwide network of potent
carbon sinks. A $12.3 million research project to capture and store carbon by growing
tules and cattails in wetlands launched by the U.S. Geological Survey this summer has
already shown some promising results, according to Environmental Science &
Technology's Janet Pelley:
The USGS project has captured eye-popping amounts of carbon—an average of
3000 grams of carbon per square meter per year (g-C/m2/yr) over the past 5 years.
For comparison, reforested agricultural land, eligible for carbon credits under the
Kyoto Protocol on climate change, socks away carbon at a rate much less than 100 g-
C/m2/yr, says Gail Chmura, a biogeochemist at McGill University (Canada).
Saltwater marshes provide biggest cooling potential
The USGS researchers determined that saltwater marshes provided the most bang for the
buck. Wetlands are great at storing carbon dioxide because of their near-constant water
cover, which prevents oxygen from entering the muddy soil; this effectively keeps
bacterial decomposition, a process which releases a lot of CO2 (this is one of the reasons
why permafrost thawing is so worrisome), to a minimum.
In fact, unperturbed wetlands are so effective that their peat soils can sometimes be 60 ft
deep and over 7,000 years old. The project, which started out in California's Sacramento-
San Joaquin River Delta, will be expanded to determine whether the restored wetlands
can help regain the land elevation lost when the delta island was drained a century ago
and to see whether "wetland carbon credits" could be sold on the state's upcoming
Concerns remain over methane release
This all sounds well and good, but some scientists are urging caution, pointing out that
the project has yet to provide reliable figures for the amount of methane emissions being
released. Though they may not cancel out the beneficial cooling effects of the wetlands'
carbon storage, the emission levels could still be relatively significant -- especially on a
One reason for concern, according to University of Florida biogeochemist Ramesh
Reddy, is that the same low oxygen to anoxic conditions that favor carbon storage also
favor the release of methane. Even if the bacteria can't access oxygen, they can use iron
oxides, CO2 or sulfate as sources of electron acceptors. Using CO2 produces methane
This makes saltwater marshes all the more appealing, says Chmura:
Because saltwater is high in sulfate, microbes in saltwater marshes don’t have to use
CO2 as an electron acceptor, and therefore they produce negligible amounts of
methane, Chmura says. She estimates that North American salt marshes sequester
an average of 210 g-C/m2/yr. These hefty rates, along with an ability to accrete
carbon faster as the sea level rises, make saltwater marshes ideal sites for restoration
and carbon storage, she says.
Soc.Agric.Blue Valley srl
Via Amerigo Vespucci 1
Tel. 041 5353412
Blue Valley srl vi propone regolarmente di trovarci e verificare direttamente le operazioni di cattura del carbonio . Questo anche a garanzia della qualità del progetto.
Potrete scoprire tutte le informazioni sulla tecnologia usata dalla D&D Consulting s.a.s. , azienda leader sugli studi delle lagune , visitando il sito www.ded-consulting.eu