What an outrageous nonsense! Alarmism and hysteria! How much has the dramatic increase of the world population to do with species extinction and not climate change?
Junk science in form of a meta study purveyed by the American Association for the Advancement of Science (AAAS)! Pure demagoguery! Shame on them!
This study is also written by only one author Mark C. Urban, which is highly unusual for complex subjects like climate. That this author is a fool is evidenced by claiming the extinctions go back to 1970 due to climate change. In the 1970s actually we had the Global Cooling mania. This author is a pseudo scientist at best and a demagogue!
What is the infamous pre-industrial age temperature? It is the temperature measured during the Little Ice Age that ended around 1850! Global Warming is a hoax and climate change is a religion.
Of course, the study also cites the infamous and ludicrous 1.5 C warming.
"... Many more extinctions will come from climate change, according to an analysis published this week in Science, which estimates that 160,000 species are already in peril.
That climate change is a lethal threat is no surprise. Many researchers have predicted as much, often using computer models that correlate specific species’ habitat conditions with likely change from climate models. The new work pulls together 485 of these studies into a global estimate of how the threat increases as average temperatures continue to rise. ...
With current warming now at 1.3°C above the pre-industrial average, an estimated 1.6% of species around the world are in danger of extinction from climate change. The reasons include heat stress, habitat change, invasive species, and other dangers. If temperature rises another 2.7°C—the amount likely given current pledges to reduce emissions—then 5% of species will be threatened with extinction from warming. Beyond that? Don’t even ask."
From the editor's summary and abstract:
"Editor’s summary
Because it is clear that human activities are altering the global climate, researchers have been studying potential effects and predicting declines and extinctions. Understanding the consequences globally requires the synthesis of many studies. Following up on an initial effort nearly 10 years ago, Urban found that we can expect, with increased certainty, that rising temperatures will lead to an increasing number of extinctions, with the highest emission scenario leading to extinction of nearly a third of the Earth’s species, especially those from particular vulnerable taxa or regions. ...
Abstract
Climate change is expected to cause irreversible changes [???] to biodiversity, but predicting those risks remains uncertain. I synthesized 485 studies and more than 5 million projections to produce a quantitative global assessment of climate change extinctions. With increased certainty, this meta-analysis suggests that extinctions will accelerate rapidly if global temperatures exceed 1.5°C. The highest-emission scenario would threaten approximately one-third of species, globally. Amphibians; species from mountain, island, and freshwater ecosystems; and species inhabiting South America, Australia, and New Zealand face the greatest threats. In line with predictions, climate change has contributed to an increasing proportion of observed global extinctions since 1970. Besides limiting greenhouse gases, pinpointing which species to protect first will be critical for preserving biodiversity until anthropogenic climate change is halted and reversed."
ScienceAdvisor
"Mark C. Urban is an international award-winning scientist, associate professor of ecology and evolutionary biology, and global expert on climate change" at the University of Connecticut. Source
