First-Ever Scientific Estimate Of Total Bacteria On Earth Shows Far Greater,,Numbers Than Ever Known Before

40 miles high in the atmosphere and beneath the ocean floor some seven miles deep..

In order to estimate the total number of bacteria on Earth, the group at Georgia divided the Earth into several areas, including oceanic and other aquatic environments, the soil, the subsurface of soil, and other habitats such as the air, inside animals and on the surface of leaves. The study brought some surprises.

"By combining direct measurements of the number of prokaryotic cells in various habitats, we found the total number of cells was much larger than we expected," said Whitman.

After making a list of known habitats for bacteria, the group searched scientific literature for direct measurements of cell numbers and the amount of carbon in cells from these habitats. They found that the great majority of bacteria are in sea water, soil, and oceanic and soil subsurface and so began to examine these habitats further.

Numerous direct measurements have been made for the total number of bacteria in the oceans, and median values were chosen to represent the three major oceanic habitats: the upper 200 meters, the deep ocean, and the upper 10 centimeters of deep ocean sediments.

Soil was divided into forest and non-forest types. The researchers then used detailed direct measurements from two studies representative of these soil types to calculate the total number of soil bacteria. Only nine data sets were available for the subsurface, but Whitman used indirect evidence to complete the picture of subsurface bacteria.

"We estimated that about 92 to 94 percent of the Earth's prokaryotes are in the soil subsurface," said Whitman. "We consider the subsurface to include marine sediments below about four inches and terrestrial habitats below about 30 feet."

Another important part of the study was an estimate of carbon content in bacteria. Carbon, of course, is a crucial element in numerous natural processes, so kno

Contact: Phil Williams
(706) 542-8501
University of Georgia

Page: 1 2 3

Related biology news :

1. Three Institutions Combine Efforts In First-Ever Demonstration Of Long-Term Function In Transplanted Human Liver Cells
2. 2nd media alert First Scientific Conference on Childhood Leukaemia
3. First International Scientific Conference on Childhood Leukaemia
4. Scientific publications: Time for change
5. Dr. Walter Reich, Ph.D., receives prestigious AAAS 2003 Scientific Freedom and Responsibility Award
6. Press briefings at The Gerontological Society of Americas 56th Annual Scientific Meeting
7. Scientific study of twins shows forgiveness has genetic component
8. Scientific equipment including the first European student experiment reaches the ISS
9. Emorys CancerQuest wins top Web award from Scientific American
10. Scientific innovations, social issues and biobusiness at Bio Tech Helsinki 03
11. Scientific balancing act dominates AAAS top ten list of science policy stories for 2002

Post Your Comments:

(Date:6/3/2016)... Das DOTM (Department ... hat ein 44 Millionen $-Projekt ... einschließlich Personalisierung, Registrierung und IT-Infrastruktur, an Decatur ... Implementierung von Identitätsmanagementlösungen. Zahlreiche renommierte internationale Anbieter ... aber Decatur wurde als konformste und innovativste ...
(Date:5/24/2016)... 2016 Ampronix facilitates superior patient care by providing unparalleled technology to leaders ... is the latest premium product recently added to the range of products distributed by ... ... ... LCD Medical Display- Ampronix News ...
(Date:5/3/2016)... May 3, 2016  Neurotechnology, a provider of ... MegaMatcher Automated Biometric Identification System (ABIS) , a ... projects. MegaMatcher ABIS can process multiple complex biometric ... combination of fingerprint, face or iris biometrics. It ... and MegaMatcher Accelerator , which have ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... PHILADELPHIA , June 27, 2016  Liquid ... today announced the funding of a Sponsored Research ... study circulating tumor cells (CTCs) from cancer patients.  ... changes in CTC levels correlate with clinical outcomes ... therapies. These data will then be employed to ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica delle ... people with peritoneal or pleural mesothelioma. Their findings are the subject of a new ... , Diagnostic biomarkers are signposts in the blood, lung fluid or tissue of mesothelioma ...
(Date:6/23/2016)... , June 23, 2016 A person commits a ... crime scene to track the criminal down. An ... Food and Drug Administration (FDA) uses DNA evidence to track ... Sound far-fetched? It,s not. The FDA has increasingly ... support investigations of foodborne illnesses. Put as simply as possible, ...
(Date:6/23/2016)... --  EpiBiome , a precision microbiome engineering company, today ... from Silicon Valley Bank (SVB). The financing will allow ... drug development efforts, as well as purchase additional lab ... been an incredible strategic partner to us – one ... provide," said Dr. Aeron Tynes Hammack , EpiBiome,s ...
Breaking Biology Technology:
Cached News: