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...
The difference is that primary succession begins in a new environment, like bare rock; secondary succession begins in an area from which a pre-existing community has been removed, such as a burned-out forest.Source(s): Asst Prof Â· 6 years ago.Thumbs up.econdary Succession-succession that begins after a disturbance that has left some of the previous community intact-e.g. abiotic disturbance (i.e. fire and storms) or human disturbance (agriculture, forestry, development) Similarities: 1.