Scientists have discovered that a tiny, yet plentiful, ocean organism is playing an important role in the regulation of the Earth's climate.
Research, published in the journal Nature Microbiology, has found that the bacterial group Pelagibacterales, thought to be among the most abundant organisms on Earth, comprising up to half a million microbial cells found in every teaspoon of seawater, plays an important function in the stabilisation of the Earth's atmosphere.
Dr Ben Temperton, lecturer in the department of Biosciences at the University of Exeter, was a member of the international team of researchers that has for the first time identified Pelagibacterales as a likely source for the production of dimethylsulfide (DMS), which is known to stimulate cloud formation, and is integral to a negative feedback loop known as the CLAW hypothesis.
Under this hypothesis, the temperature of the Earth's atmosphere is stabilised through a negative feedback loop where sunlight increases the abundance of certain phytoplankton, which in turn produce more dimethylsulfoniopropionate (DMSP). This is broken down into DMS by other members of the microbial community. Through a series of chemical processes, DMS increases cloud droplets, which in turn reduces the amount of sunlight hitting the ocean surface.
These latest findings reveal the significance of Pelagibacterales in this process and open up a path for further research.
Dr Temperton said: "This work shows that the Pelagibacterales are likely an important component in climate stability. If we are going to improve models of how DMS impacts climate, we need to consider this organism as a major contributor."
The research also revealed new information about the way in which the Pelagibacterales produces DMS.
Dr Temperton added: "What's fascinating is the elegance and simplicity of DMS production in the Pelagibacterales. These organisms don't have the genetic regulatory mechanisms found in most bacteria. Having evolved in nutrient-limited oceans, they have some of the smallest genomes of all free-living organisms, because small genomes take fewer resources to replicate.
"The production of DMS in Pelagibacterales is like a pressure release valve. When there is too much DMSP for Pelagibacterales to handle, it flows down a metabolic pathway that generates DMS as a waste product. This valve is always on, but only comes into play when DMSP concentrations exceed a threshold. Kinetic regulation like this is not uncommon in bacteria, but this is the first time we've seen it in play for such an important biogeochemical process."
Better do it quickly. We are killing the oceans.
I'll bet you thought Soylent Green was only a movie.
I'll bet you thought 'the informant' was only a movie.
So, is this your only project or do you tell that to every CEO and marketer you meet?
Yeah, you can only kick people that are already down. Narcissism must be hell. We can see by your reaction to your reflection how emotionally disturbed it makes you.