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Günter Bechly issues a challenge

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  • #91
    Originally posted by Darth Executor View Post

    Invasive species are already adapted, in that native species are not adapted to defend against them, and/or they have no natural predators in their new environment. If a native species starts evolving towards the body plan of one of your ideal predators, their prey usually adapts as well. Since the changes are slow it's highly unlikely to ever reach the disparity you see with invasive species.

    A species that already occupies a niche gains no advantage by going to war with another species to occupy their niche, for which they are already not suited for. Why would they become less adapted to their current niche just so they can go compete with a species adapted to the target niche? It's dysgenic behavior and thus discouraged by evolution. And it's why you usually need an open niche to get serious changes (beyond genetic drift or other random occurrences). It's better to stay in a niche you are already comfortable in until you are pushed out of it by environmental changes.
    A word of caution on the evolution of 'body plans' fo adapt in response to invasive predators or changing environments. Changing body plans is not common, but yes it occurs as in the flounder adaptin an asymetric body plan to become a fish that is relatively flat and can hide in the bay or sea floor.
    Glendower: I can call spirits from the vasty deep.
    Hotspur: Why, so can I, or so can any man;
    But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

    go with the flow the river knows . . .

    Frank

    I do not know, therefore everything is in pencil.

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