Bwahahahaha!!! Ants!!!! Killer Ants!!!! Save us from the evil monster mutant Killer Ants!!!
Of course this is just more "Watermelon" EnviroFUD about a demonstrably non-existent global "warming" from liberalville, where global "warming" is a "fact" because, well, lawyers and government functionaries get *paid* to say so, and because their audience is too innumerate to know what's science and what isn't after 50 years of "socialist" control of the planet's educational apparatus. Of course, to illustrate how dire and imminent all this imaginary danger is, they dredge up (okay, haul down from the Costa Rican high canopy...) a picture of the biggest, baddest, scariest ant in the whole world, the fabled Bullet Ant, an ant whose sting is so powerful that it is, indeed, reminiscent of being shot with a bullet: 24 hours of excruciating, sweating, elevated breathing and blood pressure, swollen limbs, etc. Lions and Tigers and Bullet Ants, &cet... INEWmarate Scientist, indeed... Cheers, RAH ------- <http://www.newscientist.com/article.ns?id=dn7170&print=true> New Scientist Global warming could trigger ant invasions 22:00 21 March 2005 NewScientist.com news service Shaoni Bhattacharya Enlarge image The bullet ant (Paraponera clavata) has one of the largest worker ants in the world - shown on its left antenna is a tiny Carebara reina worker ant. Both live in the forests of Central America (Image: C Richart) 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. 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." 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. Microscopic beasts Worker ant size varied from the largest - the bala or bullet ant (see photo) which is about the size of an adult human thumb - to ants so small they can only be seen with a microscope. These dramatically different ants could be found co-existing in the tropics. Kaspari says that theory suggested that body size should be bigger in the tropics, where there is more plentiful food and where the warmth enables cold-blooded creatures to perform better. But in fact, the average body size of worker ants was lower in those zones. He suggests that higher temperature may be a "double-edged sword" when organisms are growing: "It allows you to forage, but a greater fraction of what you eat gets frittered away in metabolism." He adds that smaller organisms are also good at producing lots of offspring. Energy constraints Most exciting, says Kaspari, is that "we are the first people to show that the size of an organism varies in a predictable way, and not just with latitude but based on two fundamental properties of the ecosystem - temperature and productivity". The study shows a "massive effort" in collecting data says Francis Ratnieks, a social insect expert at the University of Sheffield, UK. He notes that some large species, like leafcutter ants, eat different foods to other ant species, and therefore may respond differently to any warming. "Leafcutter ants have tapped into a rich food source, that of fresh leaves, and their energy constraints may well be very different to those of most other ants." Kaspari now plans to see if other organisms vary in size in such a predictable way, starting with the "brown food web" of decomposing organisms in soil. -- ----------------- R. A. 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