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Increased environmental carbon levels - the good news!
April 03, 2006Increasing carbon levels can be a good thing in some cases: scientists at the University of Durham propose that higher levels of inorganic carbon can have a positive influence on human health.
Carbon levels are sensed by a biological molecule, adenylyl cyclase (AC), that can then affect sperm motility or the virulence of a dangerous human pathogen. So far, AC is the only signalling molecule known to directly respond to inorganic carbon. Dr Martin Cann will present this work at the Society for Experimental Biology Annual Main meeting at the University of Kent, Canterbury on Monday 3rd April [session A1]. Dr Cann's group have been studying the effects of increased levels of inorganic carbon (Ci) on Pseudomonas aeruginosa, a pathogen that causes an array of infections in weakened patients and is renowned for being difficult to treat with antibiotics. They have found that increased levels of Ci inhibit an AC required for host cell invasion. "This suggests that the bacterium's sensitivity to Ci could potentially make this detection pathway an attractive target for the development of new anti-bacterial drugs", says Cann. "In theory, if you could increase the amount of Ci available locally to P. aeruginosa then you could stop it infecting the host."
The AC-enzyme is also known to send a cascade of signals that regulate mammalian sperm motility in response to Ci - a consequence that has implications for human reproduction, perhaps in the treatment of infertility.
Dr Cann is learning more about the role of AC in carbon-detection using cyanobacteria and will report that, in conditions of elevated environmental CO2, AC is essential for full cyanobacterial motility.
Society for Experimental Biology
Dr Cann is learning more about the role of AC in carbon-detection using cyanobacteria and will report that, in conditions of elevated environmental CO2, AC is essential for full cyanobacterial motility.
Society for Experimental Biology
Carbon Levels Current Events and Carbon Levels News RSSVolcanoes played pivotal role in ancient ice age, mass extinction
Researchers here have discovered the pivotal role that volcanoes played in a deadly ice age 450 million years ago. Perhaps ironically, these volcanoes first caused global warming -- by releasing massive amounts of carbon dioxide into the atmosphere. When they stopped erupting, Earth's climate was thrown off balance, and the ice age began.
What are coral reef services worth? $130,000 to $1.2 million per hectare, per year: experts
Experts concluding the global DIVERSITAS biodiversity conference today in Cape Town described preliminary research revealing jaw-dropping dollar values of the "ecosystem services" of biomes like forests and coral reefs - including food, pollution treatment and climate regulation.
World will miss 2010 target to stem biodiversity loss, experts say
The world will miss its agreed target to stem biodiversity loss by next year, according to experts convening in Cape Town for a landmark conference devoted to biodiversity science.
'Green' roofs may help put lid on global warming
"Green" roofs, those increasingly popular urban rooftops covered with plants, could help fight global warming, scientists in Michigan are reporting.
Ocean Carbon: A Dent in the Iron Hypothesis
Oceanographers Jim Bishop and Todd Wood of the U.S. Department of Energy's Lawrence Berkeley National Laboratory have measured the fate of carbon particles originating in plankton blooms in the Southern Ocean, using data that deep-diving Carbon Explorer floats collected around the clock for well over a year.
Study critiques corn-for-ethanol's carbon footprint
To avoid creating greenhouse gases, it makes more sense using today's technology to leave land unfarmed in conservation reserves than to plow it up for corn to make biofuel, according to a comprehensive Duke University-led study.
Can biofuels be sustainable?
With oil prices skyrocketing, the search is on for efficient and sustainable biofuels. Research published this month in Agronomy Journal examines one biofuel crop contender: corn stover.
Pacific coast turning more acidic
An international team of scientists surveying the waters of the continental shelf off the West Coast of North America has discovered for the first time high levels of acidified ocean water within 20 miles of the shoreline, raising concern for marine ecosystems from Canada to Mexico.
Compost can turn agricultural soils into a carbon sink, thus protecting against climate change
Applying organic fertilizers, such as those resulting from composting, to agricultural land could increase the amount of carbon stored in these soils and contribute significantly to the reduction of greenhouse gas emissions.
Before selling carbon credits, read this
Storing carbon in agricultural soils presents an immediate option to reduce atmospheric carbon dioxide and slow global warming.
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