I really don't like that definition, and it contradicts the earlier statement that wilderness no longer exists. If this is the case, it would suggest that evolution through natural selection has ground to a halt and that simply isn't true.
It doesn't suggest that at all. It suggests that our activities are having an effect in this regard. We don't have to physically hunt a species into extinction any longer, nor do we even have to be present. The examples of the industrialised world having such an effect are numerous in the extreme, from acid rain defoliating remote and uninhabited forest areas, to oceanic pollution destroying coral reefs. There's no part of the earth's surface where we've not had a detrimental effect that can be detected.
Furthermore it doesn't take into account any wilderness where speciation is unlikely to occur (I'm assuming by self-speciation it's referring to natural speciation); what about the surface of Mars for example?
We have no idea if there is life on Mars, as we've not found any yet. If there is no life, then surely there can be no evolution of any species. Clearly, any definition as explained above is only relevant to our own planet as we've never set foot on another one (excluding the moon and we've not found anything there either). With the moon, you'd have to use a different definition, as everything you do on the moon will be there for millions of years... even the footprints of the Apollo astronauts will be there, literally, for millions of years. On an active planet with weather, then a footprint woudl not be anything to be concerned about as in all likelihood it will last only a short while.
Obviously not wilderness on Earth, but I would still describe it as wilderness (except, maybe, where one of the rovers has been) and although I have slight hope of discovering new species there, it is only a very slight hope...
Absolutely... but clearly if we're discussing a planet without life, then we'd need another definition. Clearly it's a wilderness. The ultimate wilderness in fact, as no human being has ever been there. However, on earth, we have, so you clearly can't define a wilderness by whether anyone has ever been there before, so you need to arrive at a workable definition, and I feel that a land that can self-speciate without interruption from man's activities would be a suitable definition. It's not something I just made, up - it's a widely agreed upon definition.
Anyway, I haven't yet read the full document you linked to but on the face of it I am fully in the "managed wilderness" camp.
I agree in principle. I think we SHOULD manage wilderness... that's not my argument. It's whether it is truly a wilderness if we do. It may be the closest thing we'll get, but... (shrug). I'm not suggesting all these majestic places are somehow worthless because they're not a true wilderness. I'm as awed at some of these places as the next man. From a purely academic point of view though, I think this is an interesting philosophical point of debate.