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In search for an ecological concept defining a "whole complex of organisms inhabiting a given region" with more methodological value than 'complex organism' or 'biome' and 'biotic community', the British phytocenologist Arthur Tansley introduced the term 'ecosystem' in 1935. [...] Independently of each other, other scientists from different countries also recognized the interconnectedness of all phenomena on the Earth's surface, resulting in the parallel coining of various notions. The Russian Botanist Vladmir Sukachev (1880–1967) introduced the term 'biogeotsenoz' ('biogeocoenosis' or 'biogeocoenose'), which was broadly used in the Soviet Union and throughout Eastern Europe. It was introduced into Russian in two stages: Following the forestologist Georgii Morozov (1867–1920), who systematically implemented Karl Möbius's term 'biocoenosis', Sukachev first suggested the term 'geotsenoz' ('geocoenosis') in 1942. It was meant to link the earth's surface with its inhabitants and abiotic environmental factors in a dynamic unit. However, in 1944, he changed geocoenosis into biogeocoenosis (BGC), implementing an integral connection with Vladimir Vernadsky's (1863–1945) concepts of the biosphere and the biogeochemical cycles. According to Sukachev, BGC came close to Tansley's notion of the ecosystem which also brings together a biocoenosis with its habitat (the ecotope). However, both terms were not used synonymously: as a more general term, ecosystem was not precise enough to classify the unit of nature itself, whereas the BGC, in accordance with Vernadsky's concept of 'living matter', did not include all abiogenic abiotic factors of the ecosystem. Also, the notions of 'facies' and 'landshaft', which were used by physical geographers, were discussed as similar conceptualization.
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