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--></style><title>Pine beetle. Invader? Invited
guest?</title></head><body>
<div>Places once chilly enough to kill lots of pine beetles have been
warming up. Many formerly too-chilly places started flashing signs
that they'd become move-in-ready. The beetles read the sign.</div>
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<div>The beetle hasn't been "invading." It's just been
invited in.</div>
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<div>There's a lot of this going on, not just beetles, not just
insects, and the invader label comes into play many times in reportage
about this or that newcomer plant or animal.</div>
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<div>None of which means invader or invasive doesn't have a place, but
the media will do everybody a favor with parsing the language of
invasive species. Invited guest is at least sometimes the better
descriptor, but the climate immigrant/refugee label deserves a place
too.</div>
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<div>Is the spruce "invading" the tundra as the Arctic heats
up? Is the bass "invading" higher and higher elevation flow
along the Yellowstone as the river takes on heat?<font face="Geneva"
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<div><font face="Geneva" size="-1" color="#000000">"Climate change
is not a new topic in biology Observations of range shifts in
parallel with climate change date back to the
mid-1700s."</font></div>
<div><font face="Geneva" size="-1" color="#000000"><br>
Parmesan, Camille. Ecological and Evolutionary Responses to Recent
Climate Change. The Annual Review of Ecology, Evolution, and
Systematics 2006. 37:637-69. First published online as a Review
in Advance on August 24, 2006 </font></div>
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