Featured scientists Caroline Williams amp Andre Szejner Sigal University of California Berkeley amp Nikki Chambers Biology Teacher West High School Torrance CA In the cold insects and other ectotherms enter a reversible cold coma chill coma ID: 732928
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Slide1
Beetle, it’s cold outside!
Featured scientists: Caroline Williams & Andre
Szejner Sigal, University of California, Berkeley & Nikki Chambers, Biology Teacher, West High School, Torrance, CASlide2
In the cold, insects and other ectotherms enter a reversible cold coma (chill coma)
Video: Heath MacMillan
Chill coma videoSlide3
Insect cold hardiness
Cold requires individual to make protective molecules (e.g. sugars, sugar alcohols, amino acids, heat shock proteins)Can be energetically expensiveStressSlide4
Climate change has caused there to be less snow cover in the winterSlide5
Snow insulates the ground
Temperatures remain relatively warm and stableShocking result - colder soils in a warmer world!
When there is more snow, the ground is warmerSlide6
Beetles in their pre-testing habitat are on the right; tubes with beetles about to be immersed in a cooler filled with crushed ice are on the left.Slide7
colder ectotherm body temperatures
climate change
warmer air temperaturesoil exposed to cold air more often and for longer periods of time
less snow cover
colder soil temperature
more greenhouse gasses leads to atmosphere trapping more heat
leads to reduced snow fall and faster melting
longer chill comas
harms lady beetles and other ectotherms