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.