[MCN] Grizzly bears and exurban sprawl: Bears in "ecological trap"

Lance Olsen lance at wildrockies.org
Mon Oct 24 10:53:29 EDT 2016

Blog summary of article in Journal of Animal Ecology

Abstract for original JANE article [open access]


Parmesan, Camille. "Ecological and Evolutionary Responses to Recent 
Climate Change."
Annual Review of Ecology, Evolution, and  Systematics.  2006.  37: 637-69

"Climate change is not a new topic in biology. The study of 
biological impacts of climate change has a rich history in the 
scientific literature, since long before there were political 
ramifications   ..... Observations of range shifts in parallel with 
climate change ... date back to the mid-1700s."

"A surprising result is the high proportion of species responding to 
recent, relatively mild climate change (global average warming of 
0.6C). The proportion of wild species impacted by climate change was 
estimated at 41% of all species (655 of 1598)."

Wilfried Thuiller. "Climate change and the ecologist."
Nature 2 August 2007

"Which ecosystems are we talking about?
All of them, but climate change will affect them in different ways."

"What responses to climate change are actually documented?
In the Northern Hemisphere, the range of terrestrial plants and 
animals has shifted, on average, 6.1 km per decade northward or 6.1 m 
per decade upwards, with advance of seasonal phenomena by 2.3-5.1 
days per decade over the past 50 years. These changes are 
significantly correlated with measured changes in temperature and 
precipitation. The relationships are correlative in essence, but are 
too robust, numerous and consistent to be random or to have arisen 
from other factors (such as natural climatic variability or land-use 
change). Similarly, the remarkable increase in the plant diversity of 
some high-elevation peaks in Switzerland over the past 100 years, 
owing to the upward shift of species that traditionally inhabited 
lower elevations, can be attributed to changed climate regimes."

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