Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Understanding Microbes Blowing in the Wind

07.02.2013
With help from a wind tunnel and the latest DNA technology, U.S. Department of Agriculture (USDA) scientists are shedding light on the travel patterns of microbes in soils carried off by strong winds. The work has implications for soil health and could lead to management practices that minimize the damage to soils caused by wind erosion.

Wind erosion is an emerging issue in soil conservation efforts. Agricultural Research Service (ARS) scientists have been studying wind-eroded soils since the 1930s, but few studies have focused on the effects of wind on the bacteria, fungi, and protozoa in the soil. ARS is USDA's chief intramural scientific research agency.

Researchers see an increasing need to focus on pathogens and agriculturally important bacteria carried in dust. ARS soil scientist Veronica Acosta-Martinez, with the agency's Wind Erosion and Water Conservation Unit in Lubbock, Texas, focused on bacterial populations that could be classified by DNA sequencing. She worked with Terrence Gardner, a visiting scientist from Alabama A&M University.

Researchers collected airborne dust and samples of a type of organic soil susceptible to wind erosion from fields where potatoes, beets and onions had grown a few years earlier and exposed them to windy conditions using a portable wind tunnel. They characterized the bacteria they found in both the "source soils" and the wind-eroded sediments, focusing on types of bacteria associated with coarse particles and on the types associated with fine dust particles.

They classified the bacteria found in each type of soil and wind-eroded sediment using pyrosequencing, a process that allowed them to identify up to 100 times more DNA in each sample than they would have detected with traditional methods. The study results, published online in the Journal of Environmental Quality, showed that certain types of bacteria, known as Bacteroidetes, were more predominant in the fine dust. Other types, known as Proteobacteria, were more predominant in coarse sediments.

Studies have shown that Bacteroidetes resist desiccation and thus can survive in extreme conditions when carried long distances. The fact that Proteobacteria were associated with coarse eroded sediments, which travel shorter distances, may explain how soils can retain important qualities despite damaging winds. Proteobacteria play an important role in carbon and nitrogen cycling, and their fate in dust storms will be the focus of future research, according to Acosta-Martinez.

Read more about this research in the February 2013 issue of Agricultural Research magazine: http://www.ars.usda.gov/is/AR/archive/feb13/soil0213.htm

Dennis O’Brien | EurekAlert!
Further information:
http://www.ars.usda.gov

Further reports about: ARS Agricultural Research Bacteroidetes DNA Proteobacteria fine dust microbes

More articles from Agricultural and Forestry Science:

nachricht For pollock surveys in Alaska, things are looking up
22.05.2015 | NOAA National Marine Fisheries Service

nachricht Brazilian Beef Industry Moves to Reduce Its Destruction of Rain Forests
13.05.2015 | University of Wisconsin-Madison

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Basel Physicists Develop Efficient Method of Signal Transmission from Nanocomponents

Physicists have developed an innovative method that could enable the efficient use of nanocomponents in electronic circuits. To achieve this, they have developed a layout in which a nanocomponent is connected to two electrical conductors, which uncouple the electrical signal in a highly efficient manner. The scientists at the Department of Physics and the Swiss Nanoscience Institute at the University of Basel have published their results in the scientific journal “Nature Communications” together with their colleagues from ETH Zurich.

Electronic components are becoming smaller and smaller. Components measuring just a few nanometers – the size of around ten atoms – are already being produced...

Im Focus: IoT-based Advanced Automobile Parking Navigation System

Development and implementation of an advanced automobile parking navigation platform for parking services

To fulfill the requirements of the industry, PolyU researchers developed the Advanced Automobile Parking Navigation Platform, which includes smart devices,...

Im Focus: First electrical car ferry in the world in operation in Norway now

  • Siemens delivers electric propulsion system and charging stations with lithium-ion batteries charged from hydro power
  • Ferry only uses 150 kilowatt hours (kWh) per route and reduces cost of fuel by 60 percent
  • Milestone on the road to operating emission-free ferries

The world's first electrical car and passenger ferry powered by batteries has entered service in Norway. The ferry only uses 150 kWh per route, which...

Im Focus: Into the ice – RV Polarstern opens the arctic season by setting course for Spitsbergen

On Tuesday, 19 May 2015 the research icebreaker Polarstern will leave its home port in Bremerhaven, setting a course for the Arctic. Led by Dr Ilka Peeken from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) a team of 53 researchers from 11 countries will investigate the effects of climate change in the Arctic, from the surface ice floes down to the seafloor.

RV Polarstern will enter the sea-ice zone north of Spitsbergen. Covering two shallow regions on their way to deeper waters, the scientists on board will focus...

Im Focus: Gel filled with nanosponges cleans up MRSA infections

Nanoengineers at the University of California, San Diego developed a gel filled with toxin-absorbing nanosponges that could lead to an effective treatment for skin and wound infections caused by MRSA (methicillin-resistant Staphylococcus aureus), an antibiotic-resistant bacteria. This "nanosponge-hydrogel" minimized the growth of skin lesions on mice infected with MRSA - without the use of antibiotics. The researchers recently published their findings online in Advanced Materials.

To make the nanosponge-hydrogel, the team mixed nanosponges, which are nanoparticles that absorb dangerous toxins produced by MRSA, E. coli and other...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International symposium: trends in spatial analysis and modelling for a more sustainable land use

20.05.2015 | Event News

15th conference of the International Association of Colloid and Interface Scientists

18.05.2015 | Event News

EHFG 2015: Securing health in Europe. Balancing priorities, sharing responsibilities

12.05.2015 | Event News

 
Latest News

Mesoporous Particles for the Development of Drug Delivery System Safe to Human Bodies

22.05.2015 | Materials Sciences

Computing at the Speed of Light

22.05.2015 | Information Technology

Development of Gold Nanoparticles That Control Osteogenic Differentiation of Stem Cells

22.05.2015 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>