South American Lizards facing extinction due to climate change

Lizards are again in the news as being under threat from climate change. No, not those two footed political lizards we call politicians, who we elect again and again and who continue to support the corporate greed and short-sightedness of ripping the heart out of mother earth, destroying the environment and climate through subsidizing increasingly expensive fossil fuel extraction. We should be definitely trying to make them extinct. I am talking about four footed reptilian lizards who have evolved live birth as an evolutionary adaptation to living in cold climates. These are South American lizards who have successful adapted to a wide range of ecosystems.

I reported in May 2010 on the challenges facing lizards with climate change in "Why don't the people get rid of the lizards?". We are doing a very good job of driving the four footed reptilian lizards to extinction. Scientists estimate that "by 2080 local extinctions are projected to reach 39% worldwide, and species extinctions may reach 20%.". The 2010 scientific paper - Erosion of Lizard Diversity by Climate Change and Altered Thermal Niches - came to the conclusion that "lizards have already crossed a threshold for extinctions caused by climate change."

Tropical insects face catastrophic reduction in reproduction with climate change

It looks like cold blooded species (ectotherms) in the tropics could be at an extreme risk of extinction with just moderate increases in temperature according to scientific studies. The latest study looked at the effects of increased temperature on the entire life cycle of one tropical ectotherm species, suggesting reproduction may suffer a catastrophic reduction as the climate warms with just moderate increases in tropical temperatures. The research has possible ramifications for all tropical ectotherms - Insects, spiders, frogs, snakes, turtles and other reptiles.

This is not the first indication that global warming impact on tropical species is greater than expected. Small increases in temperature in tropical ecosystems can have large impacts as many species are already near their thermal physiological maximum. Many species also have small dispersal ranges which increases their risk of extinction through small changes in habitat or environment.

"Why don't the people get rid of the lizards?"

"why don't the people get rid of the lizards?" said Arthur Dent. Well it seems the people are doing very well at getting rid of the lizards and koalas and many other species, due to climate change. Yep, it is our carbon emissions which is driving up global mean temperatures, altering the climate and driving lizards to extinction. The quote from Arthur Dent comes from Douglas Adams explaining the concept of democracy in the Hitchhikers Guide to the Galaxy.

Unfortunately, it seems we are getting rid of the wrong lizards - the ones with four feet that eat insects and are important prey for other small carnivores. That just leaves the cold-blooded political Lizards we have elected to office, still in charge and warming themselves in the glow from the fossil fuel vested interests.