Please select your home edition
Edition
Naiad

Effects of bacterial communication on the earth's climate

by Woods Hole Oceanographic Institution on 21 Oct 2011
Tiny marine plants (phytoplankton) die or are eaten by tiny marine animals (zooplankton) which defecate into the water. All this detritus is sticky and agglomerates into heavier particles that sink. This epifluorescence micrograph of a stained gelatinous particle (about 200 microns in size) was harvested from a particle trap set 60 meters deep in Clayoquot Sound, British Columbia, Canada, in 2009. Note individual microbial cells (about 0.5 to 2 microns in length) embedded in gelatinous material Tracy Mincer | WHOI http://www.whoi.edu/
Woods Hole Oceanographic Institution (WHOI) scientists have discovered that bacterial communication could have a significant impact on the planet’s climate.

In the ocean, bacteria coalesce on tiny particles of carbon-rich detritus sinking through the depths. WHOI marine biogeochemists Laura Hmelo, Benjamin Van Mooy, and Tracy Mincer found that these bacteria send out chemical signals to discern if other bacteria are in the neighborhood.

If enough of their cohorts are nearby, then bacteria en masse commence secreting enzymes that break up the carbon-containing molecules within the particles into more digestible bits. It has been suggested that coordinated expression of enzymes is very advantageous for bacteria on sinking particles, and Hmelo and her colleagues have uncovered the first proof of this in the ocean.

'We don’t often think about bacteria making group decisions, but that is exactly what our data suggest is happening,' said Hmelo, now at the University of Washington.

The paper is published in the current online, 'early view,' issue of Environmental Microbiology Reports.

The source of carbon in the particles is atmospheric carbon dioxide, a heat-trapping greenhouse gas. Bacterial communication could lead to the release of carbon from the particles at shallower depths, rather than sinking to the ocean’s depths. According to the WHOI scientists, this means that bacterial communication results in less carbon dioxide being drawn out of the air and transferred to the bottom of the ocean from where it cannot easily return to the atmosphere. This represents the first evidence that bacterial communication plays a crucial role in Earth’s carbon cycle.


'So microscopic bacteria buffer the amount of carbon dioxide in the atmosphere through their ‘conversations,’ ' Van Mooy said. 'I think it’s amazing that there are a near- infinite number of these conversations going on in the ocean right now, and they are affecting Earth’s carbon cycle.'

The work was funded by the National Science Foundation and the Office of Naval Research.

Woods Hole Oceanographic Institution website

The Woods Hole Oceanographic Institution is a private, independent organization in Falmouth, Mass., dedicated to marine research, engineering, and higher education. Established in 1930 on a recommendation from the National Academy of Sciences, its primary mission is to understand the ocean and its interaction with the Earth as a whole, and to communicate a basic understanding of the ocean's role in the changing global environment.

Zhik Dinghy 660x82PredictWind.comProtector - 660 x 82

Related Articles

Frigid flying – Coast Guard aircrews take on New England Winter
Freezing rain? Teeth-chattering temperatures? Limited visibility? Coast Guard aircrews are still ready to fly. Freezing rain? Teeth-chattering temperatures? Limited visibility? Coast Guard aircrews are still ready to fly. At Air Station Cape Cod, aviation maintenance and electronic technicians work around the clock to ensure the MH-60 Jayhawk helicopters are prepared and ready to launch. There is one thing the maintenance crews and pilots cannot control: winter weather.
Posted on 9 Feb
When whales meet sails
CAMPER helmsman Roberto ‘Chuny’ Bermudez found himself nearly face to face with whale in middle of North Atlantic Ocean. Currently the database for marine mammal strikes is very sparse. We are requesting sailors and boaters help to submit information on current and past incidents, however long ago that may be. By giving a location, date, identification if possible, and any other relevant information you can help scientists better understand where marine mammals are at risk for strikes
Posted on 8 Jan
Vendée Globe – Uncertainty about weather condition in North Atlantic
Alex Thomson and Armel le Cléac'h are probably looking closely at the wind models for the North Atlantic. Alex Thomson and Armel le Cléac'h are probably looking closely at the wind models for the North Atlantic. It does not seem to be easy.
Posted on 4 Jan
10,000 metric tons of plastic enter Great Lakes every year
A new study inventories and tracks high concentrations of plastic in Great Lakes could help inform cleanup efforts A new study by Rochester Institute of Technology that inventories and tracks high concentrations of plastic in the Great Lakes could help inform cleanup efforts and target pollution prevention.Researchers found that nearly 10,000 metric tons—or 22 million pounds—of plastic debris enter the Great Lakes every year from the United States and Canada.
Posted on 2 Jan
The Deepwater Horizon aftermath
Researchers analyze 125 compounds from oil spilled in Gulf of Mexico to determine their longevity at different levels. Researchers analyze 125 compounds from oil spilled in the Gulf of Mexico to determine their longevity at different contamination levels. The oil discharged into the Gulf of Mexico following the explosion and sinking of the Deepwater Horizon (DWH) rig in 2010 contaminated more than 1,000 square miles of seafloor.
Posted on 1 Jan
What happened to Deepwater Horizon Oil?
What happened to the 160 million gallons of oil that gushed for 87 days into the Gulf of Mexico in 2010? Six years after the Deepwater Horizon oil spill, we are continually asked two questions. What happened to the 160 million gallons of oil that gushed for 87 days into the Gulf of Mexico in 2010? Was discharging 1.67 million gallons of chemicals into the ocean to disperse the oil a good or bad idea?
Posted on 24 Dec 2016
Vendée Globe – Light winds for Banque Populaire and Hugo Boss
The first one to get out of it will have a nice north-westerly flow on the edge of the high pressure system. Banque Populaire and Hugo Boss are sailing in a complex weather system in a light wind zone. The first one to get out of it will have a nice north-westerly flow on the edge of the high pressure system.
Posted on 15 Dec 2016
Great Barrier Reef managers and industry prepare for summer
Marine park managers, scientists and experts recently met for the annual pre-summer workshop Marine park managers, scientists and experts recently met for the annual pre-summer workshop to assess climate-related risks to the Great Barrier Reef over the coming months. Current predictions by the Bureau of Meteorology and National Oceanic and Atmospheric Administration are for a summer of average sea temperatures across the Great Barrier Reef.
Posted on 7 Dec 2016
Fourth Blog from on board Perie Banou II
Oh no - not the coffee cup Oh no - not the coffee cup - Jon keeps us all entertained as he approaches Reunion Island. The B&G chartplotter tells me since leaving the pleasant mid Western Australian town of Carnarvon (by world standards, an isolated town), that I have sailed some 2559 NM and have 751nm to go to Le Port Reunion Island. French. Reunion is a Suburb (department) of Paris. Population 844,000.
Posted on 23 Nov 2016
Third Blog from onboard Perie Banou II
Wind over the last week has been quiet and mild - Trade Winds from South East and South South East. It is 0830am here. 1030 in Western Australia. Windy. Rather Windy. Wind over the last week has been quiet and mild - Trade Winds from South East and South South East. Barometer 1018 to 1020 whatever they are. Last night I tapped the barometer and it sorta went oops. 1015hPa. Blimey.
Posted on 18 Nov 2016