To use risk assessments or other sorts of predictive tools, there has to be a fair amount of ecological and other biological information, and many of the databases do not capture this information. Likely types of impacts, at several levels. Some species affect entire ecosystems, directly or indirectly feral pigs, European boar, and their hybrids, for example. There are effects at the community level, for example on community structure. There are a whole battery of impacts on particular species, like predation, competition, parasitism, disease, herbivory.
Hybridization is also a frequent impact.
And there are economic and other impacts associated with these ecological impacts. Some fraction of this information is needed for even a cursory risk assessment. It will be obvious that, for many NIS, much of this information is unavailable, so some databases will be sparsely populated, a point I will return to. But some of it is available, and it is important information. Prioritization and Decision Making .