“…2) the environmental or biotope-type approach (Merriam 1894; Emberger 1936Emberger , 1942Holdridge 1947Holdridge , 1967Elton and Miller 1954;Dansereau 1957); 3) the landscape-type or biogeocoenose-type approach (including both landscape and microlandscape levels, as reviewed by Whittaker 1973b); 4) the biotic area or province approach (Whittaker 1973b); 5) the life-zone and segments oi~community gradients approach (Merriam 1890(Merriam , 1898(Merriam , 1899Kendeigh 1954;Beard 1955;Whittaker 1973b;Beard 1973;Aleksandrova 1973); 6) the dominance-type approach (reviewed by Whittaker 1962Whittaker , 1973c; 7) the vegetation dynamics approach (Tansley 1911(Tansley , 1920(Tansley , 1939Clements 1916Clements , 1928Clements , 1936Weaver and Clements 1929;Whittaker 1953Whittaker , 1974; 8) the stratal or lifeform approach (Gams 1918(Gams , 1927Lippmaa 1933Lippmaa , 1935Lippmaa , 1939Barkman 1958;reviewed by Barkman 1973); 9) the stratal combination or sociation approach (Fries 1913;Du Rietz 1921, 1932Daubenmire 1952Daubenmire , 1966Aleksandrova 1973;Trass and Maimer 1973); 10) the northern Europe site-typ...…”