I did not write what you seem to have read, Ilian.
* The "gardening" I am referring is nature conservation management. The shown examples have no such goal, I'm sure.
* I love deserts (especially if you bend the definition to include the US ones). I was referring to (practically) irreversible alternate stable states caused by human action. I am talking about this chronology:
(1) high biodiversity area,
(2) suffers severely loss,
(3) all human impact seizes,
(4) subsequent 'natural evolution', leading to a long-lasting steady state of low biodiversity.
Think of the desertification in Crete or the spread of Eucalyptus.
If you let it be, you have accept permanent biodiversity loss. If we can manage the place to make up for the biodiversity loss (mitigation, reversal, ...), I say: let's do it (catholic guilt complex, anyone?). This is particularly crucial for species with limited dispersal capacity in fragmented habitat patches in human landscape. There are practically no "wild places" in Europe. No other continent underwent man-induced alteration for such a long time and on such scale. So, we'll have to live with the "gardening" or let it all go to hell.
We've all had this discussion before. I'd rather read about what all of YOU are doing about biodiversity loss near your home or anywhere else. I'm hardly an optimist, quite the opposite, really, but I get a little bit annoyed by angry bystanders who cannot be bothered to participate in conservation and decision making. Anyone can at least try to voice views to make things better for the herps.
Finally, I think the weather is too nice for this type of talk. I think I need to go and try to find a "wild place".