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Another example of self-regulation is the world's oceans.

River annually to the ocean 1.5 million tons of calcium carbonate and salt composition of ocean water does not change significantly. Why? These organisms use carbonate to build their skeletons, and after their death carbonates deposited on the bottom. So by creating a "calcium-sheets" of our planet is stabilized composition of ocean waters. This mechanism operates in the biosphere for many millions of years. Thus, self-regulation of Earth's biosphere is provided by living organisms. This suggests that the biosphere centralized cybernetic system. Under this name combined system in which one element (or subsystem) plays a dominant role in the functioning of the system as a whole. This element is called the leading part of the system or its center. Living organisms in the biosphere and play the role of the center.

Earth as a planet is characterized by considerable diversity of natural conditions. This is determined by its spherical shape, its motion around the Sun and around its axis, which in turn leads to latitudinal and seasonal changes in the intensity of solar energy. Considerable variety of natural conditions created and dissected topography of the Earth. But the main variety of the Earth's biosphere is created by living organisms.