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Old 12-11-2009, 12:36 PM   #1
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Default Courting Controversy with a New View on Exotic Species

Courting Controversy with a New View on Exotic Species
19 Nov 2009: Report
By Greg Breining

Courting Controversy with a New View on Exotic Species by Greg Breining: Yale Environment 360
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When biologist Mark A. Davis talks about exotic species, he eventually comes to LTL, his shorthand for Learn to Love them. Flying in the face of the conventional wisdom among biologists that exotic species are harmful to native ecosystems, Davis and a small cohort of biologists espouse a heretical viewpoint: Exotic species are here to stay, so get used to them, and forget about ripping out the fast-spreading shrub, buckthorn, on a large scale or throwing Asian carp on the bank to die...
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Old 12-31-2009, 01:55 PM   #2
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To read this guy we should throw in the towel on eradication or control of a few other invasives like Ebola, malaria protozoa, yellow fever, and HIV viruses, http://wildlifeprofessional.org/blog/?p=1171
"He says that Davis's argument that not all exotics are invasive is impractical. "A number of introduced species have been innocuous for decades and they [can] suddenly explode and become problematic," he says. He points to the example of ornamental figs in Florida, which arrived in the early 1900s. Confined to backyards until their pollinating wasp showed up 25 years ago, figs have now invaded Everglades National Park."
http://dallasmorningviewsblog.dallasnews.com/archives/2009/04/on-mark-davis-a.html Be the first to review his book, http://www.amazon.com/Invasion-Biology-Oxford-Mark-Davis/dp/0199218765

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Old 12-31-2009, 02:01 PM   #3
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Invasive species are destructive by definition. The generally accepted definition of invasive species is "an alien (or non-native) species whose introduction does, or is likely to cause economic or environmental harm or harm to human health." If an exotic species is not harmful or likely to be harmful, it's not invasive by definition. Davis needs to stop screwing with the definitions. Not all exotics are invasive… I swear this Mark Davis guy is related to JL Hudson, http://www.wildlifegardeners.org/forum/invasive-flora/3567-alien-invasion-ecologist-doubts-impact-exotic-species.html I never pass up an opportunity to point out to everyone that JL Hudson = David I Theodoropoulos. Anywho... Davis has a book to sell just like Theodoropoulos does and contrarianism sells.
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Old 12-31-2009, 02:10 PM   #4
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I sort of understand his point,we are stuck with many invasives and more will come. Human movement insures this.
What we can do is slow it and allow our natives to adapt to the new conditions. I am often amazed by natives struggling to survive amid the invasives but each one that does and reproduces increases its chances for a longer run.
Many native plants disappear from an area because of active eradication programs by agriculture or urbanization. If enough areas are allowed to grow native plants,with a little help from friends, maybe a new community will evolve.
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Old 12-31-2009, 02:23 PM   #5
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He does make some valid points... not everything he writes is totally off the wall but it's hard to find the few pearls amidst all the contrarianism.
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