43651622 Biologists have counted all species on Earth
Biologists have presented the most accurate assessment to date of species of living organisms in nature. Article scientists appeared in the journal PLoS One, and its summary results in Nature News. According to scientists, the world inhabited by 8.7 million (with an accuracy of 1.3 million) of beings, of which approximately 7.7 million animals are. As part of the researchers considered only the eukaryotes – organisms whose cells contain nuclei (the term 'species' biology is used only to eukaryotes). Because of this, for example, "census" is not got archaea and bacteria. The new result is much more precise previous estimates, which ranged from 3 to 100 million. Of the new study, in particular, implies that about 86 percent of the land and 91 percent of marine organisms has not yet been discovered. According to the researchers, for cataloging unknown species require a minimum of 480 years of intensive research. As part of the researchers used a statistical method for graph analysis classification of different kinds. They managed to construct an interpolation model based on which they did their own suggestion – in fact, scientists believed the number of unknown species on the basis of how classified is found (currently known 1.2 million species). According to scientists, the information about the diversity of life on Earth is an absolutely fundamental knowledge. In particular, such knowledge is necessary in studying the impact of human activities on the environment. More recently, scientists have discovered that living organisms are prevalent in the world is wider than previously thought. For example, scientists have found round worms that live at depths greater than one kilometer. It was assumed that in such multicell depth can not exist because of the high pressure and lack of sufficient nutrients.
