Global warming could trigger ant invasions
Global warming may lead to an unexpected threat from the insect world - swarming invasions of tiny ants - suggests new research. The study of 665 ant colonies in environments ranging from tropical rainforests to frozen tundra suggests that in warmer environments the ants' body size shrinks, on average, while the number of individuals in the colony booms.
Interesting response. One might almost think they'd been through this process before...
Global warming might shrink ant workers by as much as a third, says Michael Kaspari at the University of Oklahoma, US, and the Smithsonian Tropical Research Institute in Panama, who carried out the study: "And since ant species with small workers appear to be particularly successful at invading, ant invasions - already destructive - may become more common in a warming world."
It's pretty damn common in my kitchen already.
Kaspari found that worker ant and colony size varied almost 100-fold in his survey of ant colonies in 49 ecosystems in the Americas. Average nest populations varied from 63 workers in a cold temperate pine forest, to over 9000 workers in a hot, temperate desert. "The tiniest colonies are not much bigger than the inside of a Cheerio while the largest colonies can fill up a garbage can," he told New Scientist.
Garbage can? C'mon, some of the big leaf-cutter colonies cover acres, pal... |