Thank you very much.
I'd like to welcome our witnesses. Thank you very much for joining us today for this very interesting subject matter. It is important to our economy, in looking at some of the numbers here. It involves a lot of challenging mechanisms for implementation in terms of monitoring the movement of plants, animals, and insects.
My first question comes out of the definition--maybe a good starting place. I notice in your first deck you define alien species of plants, animals, and micro-organisms introduced by human action outside of their natural past or present distribution. I'll come back to that. But invasive, of course, simply means harmful. So it's important to define these terms.
On harmful species that have moved, can you give us some ideas? Since these definitions were adopted in 2004, where do you draw the line when you're talking about natural past and present distributions? There has to be a starting point, since species and humans have moved around. What did you use as a starting point?