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Saturday, October 22, 2016

On our Earth have counted a trillion species

According to the new estimates, our planet is home to about one trillion microbial species, of which 99.999 percent have not been discovered. More recently, in 1998, the number of types of germs, according to scientists, does not exceed, at most, a few million, that is, they were approximately the same as insects. But since the number of types of microbes became uncontrollably grow.

photo: morguefile.com

Recently biologists Indiana University Kenneth Loci and Jay Lennon, using two techniques of calculations, came to the conclusion that the number of species on our planet significantly more than expected by science.

The first method of calculation extrapolated from the number of microbes is based not on individual organisms, and samples of their DNA. “So if we say “million”, we mean a million pieces of DNA, which, in our opinion, belong to different organisms and are of different types,” says Dr. Loci.

The second approach involves the use of well-known models limnogeology as the basis for scientific predictions. “If you know the number of individuals, you can predict the most numerous species,” says the same Dr. Loci.

And now scientists have taken both of these methods of information input — the number of individuals in General and the number of individuals belonging to the most numerous species. Both methods give the same result: there are from 1011 to 1012 types of microbes.

“We believe that our approach has been most strict, since we used the theoretical predictions and statistical evaluation. In the end we got crossing each other the predictions based on both methods,” the scientists say.

The establishment of a number of species can have very deep consequences. “How many species would in reality be developed over four billion years of our planet? What are the upper limits for the earth’s evolution? How many types were further developed and how much could I get?” — ask the scientists and they themselves answer: “as far As we know, nobody has asked those questions. We are very, very far from disclosing secrets of the world around us”.



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