[MCN] Pine beetle. Invader? Invited guest?
lance at wildrockies.org
Wed Jan 25 14:21:22 EST 2017
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
The beetle hasn't been "invading." It's just been invited in.
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.
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.
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?
"Climate change is not a new topic in biology
Observations of range shifts in parallel with
climate change date back to the mid-1700s."
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
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