Summary: The Black Sea and its inhabitants. Category: Geography, geology and geodesy

Summary: The Black Sea and its inhabitants Category: Geography, geology and geodesy
Black Sea on the composition and nature of the distribution of living organisms is very peculiar and unique. None of sea in the world has the depth of division into two zones - oxygen (to a depth of 150-200 m) and a life devoid of hydrogen sulfide (below 200 m), which occupies 87% of its water supply. A selection of plants and animals with 13% of water. It is in the oxygen layer inhabit several hundred planktonic and benthic algae and more than 2,500 species of animals. The latter include 500 species of single-celled organisms, circa 1900 - invertebrates, 185 species of fish and 4 species of mammals. If you get more information, visit our site: BEST ESSAY CHEAP