The Truth About Invasive Species: or,How to stop worrying and learn to love ecological intruders Dis

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The Truth About Invasive Speciesor,How to
stop worrying and learn to love ecological
intrudersDiscover magazine, May 2005
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Effects of invasive species on biodiversity

• 1. With invasions in a place like San Francisco
  Bay, youve got more species than you had before.
  If youve added 250 new species since 1850 with
  no species known to have gone extinct, why dont
  we consider that good? Jim Carlton (quoted in
  May 2005 Discover)
• This quote does not represent Carltons true
  position. Follow this link http//www.actionbiosci
  ence.org/biodiversity/carlton.html
• 2. Diversity sampling is the act of selecting
  from the worlds biodiversity species which
  represent a wide range of phylogeneticly (sic)
  groups. For example, if one grows a fern, a
  conifer, a buttercup, a bean, a daisy, a lily a
  grass, these seven species represent a greater
  diversity than seven species of a single genus of
  daisys (sic).
• 3. . . . In all cases, including even oceanic
  islands, introduced species have increased
  biodiversity.
• 2 3 are two from J. L. Hudson, Seedsman, La
  Honda, CA, who urges clients to oppose new
  restrictions on importing non-native species
  Under this new system, expensive safety testing
  will be required . . . Thus only major
  corporations will be able to introduce new plants
  into cultivation.

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Purple loosestrife
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Tamarix (aka salt cedar)
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Kudzu
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Broom (Scotch, Spanish, or French)
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Invasive (Centaurea) outcompetes native species
(Nasella) when mycorrhizal fungi are present
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Native species (Nasella) does better against
invasive species when mycorrhizal fungi are
removed
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Invasion of Yellow Star Thistle Coming to a
theater near you