There are also some special post codes: the airport has its own post code (1300), the UN (1400) and some big companies also have their own post code, for example the ORF, the Austrian National Broadcasting Service (1136).
Two different types of succession, primary and secondary, have been distinguished. Primary succession occurs in essentially lifeless areasâregions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. Secondary succession occurs in areas where a community that previously existed has...
For instance, a new community of forest trees introduces shade to its ecosystem, or a previous community of vegetation that changed the fertility of the soil. Succession may arise from the formation of new, unoccupied habitat (e.g. a lava flow or a severe landslide).This kind of succession in which the sequential development of plant or animal communities in an area where no soil initially exists is called primary succession.Succession may also be initiated by a disturbance of an existing community (e.g. fire, severe windthrow, logging).This kind of succession where communities develop in areas where soil already exists is called secondary succession.or instance, a new community of forest trees introduces shade to its ecosystem, or a previous community of vegetation that changed the fertility of the soil. Succession may arise from the formation of new, unoccupied habitat (e.g. a lava flow or a severe landslide).