(or life regions), the three most important subdivisions of the biosphere: dry land, the sea, and inland waters. Each biocycle is subdivided into biochores, which include a significant number of biotopes. For example, biotopes of sandy, clayey, and rocky deserts unite to form the desert biochore, which—together with forest, steppe, and other biocycles—makes up the dry-land biocycle. The term “biological cycles” is used in ecology in a different sense.
REFERENCESGeptner, V. G. Obshchaia zoogeografiia. Moscow-Leningrad, 1936.
Naumov, N. P. Ekologiia zhivotnykh. Moscow, 1955.
Vernadskii, V. I. Khimicheskoe stroenie biosfery Zemli i ee okruzheniia. Moscow, 1965.
Ecological Animal Geography. New York, 1951.
I. A. SHILOV