May 4, 2018 08:26 PM
As the U.S. turns its back, poor countries can expect more volatile temperature swings
https://grist.org/article/poor-countries...e-climate/
EXCERPT: The effects of climate change are already hitting hardest in the parts of the world that have contributed the least to our current state of affairs. That, we already know. Now, new research indicates these same regions, among the globe’s poorest areas, will experience the most dramatic variations in temperature over the next 80 years — higher highs and lower lows. [...] Areas around South America’s Amazon rainforest, in southern Africa, the Arctic coast, as well as subtropical areas in the Northern Hemisphere, such as the Sahel region of Africa and parts of India, are in line for volatile weather. “The most important finding is this unfair pattern of temperature-variability change,” explains Sebastian Bathiany, a post-doctoral researcher at Wageningen University in the Netherlands and the lead author of a study published this week in Science Advances. “Large fluctuations are more difficult for systems and the environment to cope with. So that means that the more negative impacts are in the poorer countries.”
MORE: https://grist.org/article/poor-countries...e-climate/
Odd microbial partnerships via electrically conductive particles
https://www.sdu.dk/en/om_sdu/fakultetern...c_microbes
RELEASE: Human activities have contributed to global warming subsequently leading to increasing erosion of land. This results in conductive minerals being washed increasingly into water streams. The inflow of conductive particles can enable unusual electric partnerships between microbes leading to additional emissions of methane, which is a potent greenhouse gas.
Microbes work in mysterious ways. Some thrive in extreme cold, under extreme pressure, in extreme heat, in extreme salinity or in extreme acidity. Some feed on organic material, while others prefer rock, chemical compounds or heavy metals.
In the journal mBio, researchers report their encounter with microbes that go for something completely different when looking for attractive living conditions.
- In The Baltic Ocean we discovered microbes that share a meal, which neither could efficiently eat alone. They establish their odd interaction by transferring electricity from one species to another via conductive particles. So they use the conductive particles to interact electrically with each other and outcompete anyone else that might be enticed by the same food source, explains lead author Amelia-Elena Rotaru from University of Southern Denmark.
This rather bizarre electric relationship via conductive particles is not only a biological curiosity -- it also prompts the production of methane, which is a potent greenhouse gas.
The SDU-lead team showed that the microbes required the conductive particles in order to thrive and release methane. Such particles can be of many different origins, as many materials are conductive. One example is magnetite, which is an abundant iron-oxide mineral in Baltic Sea sediments. Magnetite is a type of particle which can be supplied to the seawater from land erosion.
Two microbes established a conductive particle driven alliance. These microorganisms are named Geobacter and Methanosarcina.
The study shows that as long as conductive particles were available, they both persisted, but when conducting particles were taken away, Geobacter went extinct and Methanosarcina dramatically decreased its activity.
Not only do the two studied bacteria species benefit from this collaboration -- they also manage to keep other microbes (Methanothrix) attempting to compete for the same resources away.
In the Bothnian Bay, conductive particles can be supplied from river runoff from the eight rivers entering the bay from Sweden and Finland, and also via the runoff from the forestry industry and various coastal industries.
"This was the first time we could scientifically document a conductive particle based associations between bacteria and methanogens from environmental samples. We are now finding similar trends in other aquatic environments such as oceanic oxygen minimum zone, or lake sediments," said the lead author.
Amelia-Elena Rotaru and her team presently focus on finding a way to make microorganisms work for us to produce the chemicals of the future.
- If we can find a way to use the electric properties of microbes to store carbon and electricity while producing biodegradable and safe materials similar to those made today from fossil fuels we would have achieved our ultimate goal to foster a sustainable society, said Amelia-Elena Rotary.
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https://grist.org/article/poor-countries...e-climate/
EXCERPT: The effects of climate change are already hitting hardest in the parts of the world that have contributed the least to our current state of affairs. That, we already know. Now, new research indicates these same regions, among the globe’s poorest areas, will experience the most dramatic variations in temperature over the next 80 years — higher highs and lower lows. [...] Areas around South America’s Amazon rainforest, in southern Africa, the Arctic coast, as well as subtropical areas in the Northern Hemisphere, such as the Sahel region of Africa and parts of India, are in line for volatile weather. “The most important finding is this unfair pattern of temperature-variability change,” explains Sebastian Bathiany, a post-doctoral researcher at Wageningen University in the Netherlands and the lead author of a study published this week in Science Advances. “Large fluctuations are more difficult for systems and the environment to cope with. So that means that the more negative impacts are in the poorer countries.”
MORE: https://grist.org/article/poor-countries...e-climate/
Odd microbial partnerships via electrically conductive particles
https://www.sdu.dk/en/om_sdu/fakultetern...c_microbes
RELEASE: Human activities have contributed to global warming subsequently leading to increasing erosion of land. This results in conductive minerals being washed increasingly into water streams. The inflow of conductive particles can enable unusual electric partnerships between microbes leading to additional emissions of methane, which is a potent greenhouse gas.
Microbes work in mysterious ways. Some thrive in extreme cold, under extreme pressure, in extreme heat, in extreme salinity or in extreme acidity. Some feed on organic material, while others prefer rock, chemical compounds or heavy metals.
In the journal mBio, researchers report their encounter with microbes that go for something completely different when looking for attractive living conditions.
- In The Baltic Ocean we discovered microbes that share a meal, which neither could efficiently eat alone. They establish their odd interaction by transferring electricity from one species to another via conductive particles. So they use the conductive particles to interact electrically with each other and outcompete anyone else that might be enticed by the same food source, explains lead author Amelia-Elena Rotaru from University of Southern Denmark.
This rather bizarre electric relationship via conductive particles is not only a biological curiosity -- it also prompts the production of methane, which is a potent greenhouse gas.
The SDU-lead team showed that the microbes required the conductive particles in order to thrive and release methane. Such particles can be of many different origins, as many materials are conductive. One example is magnetite, which is an abundant iron-oxide mineral in Baltic Sea sediments. Magnetite is a type of particle which can be supplied to the seawater from land erosion.
Two microbes established a conductive particle driven alliance. These microorganisms are named Geobacter and Methanosarcina.
The study shows that as long as conductive particles were available, they both persisted, but when conducting particles were taken away, Geobacter went extinct and Methanosarcina dramatically decreased its activity.
Not only do the two studied bacteria species benefit from this collaboration -- they also manage to keep other microbes (Methanothrix) attempting to compete for the same resources away.
In the Bothnian Bay, conductive particles can be supplied from river runoff from the eight rivers entering the bay from Sweden and Finland, and also via the runoff from the forestry industry and various coastal industries.
"This was the first time we could scientifically document a conductive particle based associations between bacteria and methanogens from environmental samples. We are now finding similar trends in other aquatic environments such as oceanic oxygen minimum zone, or lake sediments," said the lead author.
Amelia-Elena Rotaru and her team presently focus on finding a way to make microorganisms work for us to produce the chemicals of the future.
- If we can find a way to use the electric properties of microbes to store carbon and electricity while producing biodegradable and safe materials similar to those made today from fossil fuels we would have achieved our ultimate goal to foster a sustainable society, said Amelia-Elena Rotary.
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