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Ailanthus altissima: "toxic tree of heaven"
On Wed, 20 Sep 2006 14:43:01 +0100, "Des Higgins"
wrote: "Geoff" wrote in message .. . On 19 Sep 2006 09:55:36 -0700, "Bill" wrote: BAC wrote: "Bill" wrote in message oups.com... BAC wrote: Don't panic, it's been here for 250 years or so without 'taking over'. But the climate has heated up at an accelerated rate and now it might be more sympathetic to this trees native conditions. It may indeed, but that doesn't mean it will inevitably become a problem here. Good point. (I probably got sucked into the Observer's screaming article title... next time i'll buy the Mail on Sunday) No doubt happily spread by CONservation hooligans, trying to hold back the tide of evolution. It is actually undoing millions of years of evolution by letting species mix willy nilly. Over long time spans, you get more and more species and species mixtures evolving that are highly specific to particular locations and habitats and which can do this because they are isolated Then when we come along and mix them with each other you get species warfare and you end up with fewer species as one species replaces others either directly through competition or indirectly through habitat loss/change (e.g. Rhodendron ponticum in SW Ireland are replacing Oakwoods and all the mosses and liverworts that live in them). That is backwards evolution towards the kind of species mix you get in supermarket carparks. Disgruntled of Dublin I agree. Just take a look at mankind, and what happened. |
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