Numerous hectares of olive trees in the Salento Peninsula in Italy are dying...pročitajte više
The Risk Assessment
In order to evaluate the invasiveness of an alien species and with it its potential negative impacts in a certain area, risk assessments are conducted. The procedure usually looks like a questionnaire in which answers are given to a series of questions that make a base for classifying the invasiveness of a species. The species for which risk assessments are conducted can already be present in a certain area or can only be present in neighbouring areas.
There is no completely reliable way of assessing whether or not a species will become invasive in a certain area, however a comparison with areas with similar ecological conditions may be used as a relevant characteristic.
The procedure of invasiveness assessment is usually done for an individual species, in which the probability of the introduction of a species, the possibility of maintaining its population and the pace in which it can spread, as well as its potential influence is considered. A similar but more complex procedure can be done for the entry pathways.