The Planet as a Garden?

I have somewhat mixed responses to the up-dating of news ( http://www.landscapejuice.com/2008/05/the-national-tr.html) that the National Trust nearing the end of its hi-tech survey (using GPS and even some DNA techniques) to record all its trees and major plants. The obtained data will be combined with similar information from other parts of the world, before being stored in a database in Chicago. I appreciate that the material and information might prove useful in terms of restoring threatened species to their original locations (the Victorians collected many plants from exotic regions and they now survive in parks, gardens and scientific plant collections) in the event of ecological 'disasters'. One hopes, of course, that Chicago will be immune from any such events. A concern, however, is the view that things are just perfect now. It was suggested that, in the event of an occurence like the 'great storm' of 1987 that blew down many trees in the south of England, one could replace like with like. This is a bit too much like gardening for my taste. Some of the effects of the tree felling eventually proved beneficial in a biodiversity sense. I do hope that things will sometimes be 'allowed' to change.