Eco-ping!
This news doesn't come as a big surprise. There aren't many ecological tennets that can be applied at all places, under all conditions- especially watersheds!
ooops forgot the list!
Chaos Theory
A scientific theory for dealing with systems that are complex, unpredictable, and/or have random events, or, in other words, most of the real world. Natural systems are so complicated that no matter how carefully we measure them, we can't know everything about them. Although measurements can be extremely accurate, they can't be accurate to infinity, and tiny differences/errors in the beginning can lead to gigantic ones later. This is known as the Butterfly Effect, because under the right circumstances, the effect of the fluttering of a butterfly's wings can make the difference between whether or not there will be a tornado.(So much for ever getting accurate weather predictions.)This shows how even the actions of the smallest creature can have a large effect on the whole.