I am reading a book called "Panic in Level 4" by author Richard Preston, who also authored "Hot Zone", about the ebola virus. One of his chapters focuses on an exotic tree parasite, the woolly adelgid, that is wiping out Eastern Hemlock. The stories pose an interesting issue about how humans affect the ecosystem merely by our advancements in travel and international commerce. One reviewer called it "a sobering reminder of the delicacy of our ecosystem".
I do not subscribe to the "delicacy" point of view or the "man is evil" point of view that many take as a default position on this. I look at it more as "humans are an interesting and powerful natural agents of change".
In any case, Mr. Preston describes lovingly the few hundred year old ecosystem supported by these majestic trees and the "ecoystem collapse" that is currently taking place via these exotic fauna that feast on the tree needles. Do you know what happens during and after an "ecosystem collapse"?
Another beautiful and "delicate" ecosystem takes its place.
I love descriptions and phrases that are meant solely to manipulate my emotions.