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RE: foreign species competition

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Posted by: wstreps at Sun Mar 12 08:12:50 2006   [ Email Message ] [ Show All Posts by wstreps ]  
   

Your commenting on the effect one species has on another in areas where only one of the species occurs ? While my observations are based on watching the direct interactions of the two species and the effect environmental changes has had on each of them under the exact same conditions. Cause and effect. I`d say my observations are pretty valid . Green anoles may be able to survive in areas where the foliage has been greatly reduced but these are far less suitable conditions and put them at a large disadvantage. While a species may continue to exist in these circumstances sooner or later it will catch up with them. On the other hand environmental changes that increase the preferred habit of a species is to their advantage and their success will increase.In these greatly altered conditions the brown anoles are far better suited and this is what in enables them to increase their numbers while the now less then favorable conditions for the green is ultimately it`s demise.The bottom line is had the environment remained in it`s original condition the green and brown anoles would exist together but change it to give one species a huge advantage and it`s a different story.This isn`t " what if " speculation but a scenario that I observed on multiple occasions. Think about it an animal that turns bright green as part of it`s evolutionary development is taken from a leafy green area and placed into an open rocky setting with few plants. I would say now turning bright green puts at a huge disadvantage . Now put an animal that is much more terrestrial ,stays dull brown to black in color and who`s defense is to run to the ground and hide in between rocks in those conditions . I think it`s common sense that animal will flourish and not because it`s pushing the other species out but because it`s FAR better able to take advantage of the newly altered habitat. And yes you are wrong habitat destruction has taken a toll on green anole populations like many other species in many areas other then Florida but for the record Florida is the ultimate place to study invasive species ,habitat displacement and the resulting impacts.


Ernie Eison


   

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