Eorl wrote:Ros, I don't think anything is truly artificial.
The same reasoning gets me into arguments about wild cats being a natural part of the Australian ecosystem. Why wouldn't they be? Just because we introduced them? What is unnatural about that?
Hi Eorl, I know how you feel. I get into the same tangled argument sometimes.
I fully understand the effect that an invasive species can have on a stable habitat, but is it really any worse if it rides in on a ship, or on a piece of driftwood?
I think it depends on the viewpoint from which you ask the question. Is an invasive species "damaging" to its new environment, or was that environment meant to be dynamic and ever changing right from the beginning. The same can be asked of particular species, should they all be saved from extinction, or is it all just part of the standard flow of extinction.
Humans exist in short timeframes when compared to evolution, and we tend to not like change, so it's not surprising that we want to save everything and make it all stay the same. In the timeframe in which we live, things will only die. It will take thousands of years (or more) for *new* things to take their place and we won't be around to enjoy that phase of the process.
All that having been said, I still believe that we humans should try to minimize our impact on the biosphere. Not because we are not part of the system, but because it's the wiser course of action to take, and making wise decisions is *also* our prerogative in the natural course of things.