Shamefully, Australia has one of the highest extinction rates in the world. And the number one threat to our species is invasive or “alien” plants and animals.
But invasive species don’t just cause extinctions and biodiversity loss – they also create a serious economic burden. Our research, published today, reveals invasive species have cost the Australian economy at least A$390 billion in the last 60 years alone. Continue reading Weekly salon 23/8→
by combining oxygen loss with ever-worsening ocean warming and acidification, humans are re-creating the conditions that led to the worst-ever extinction, which killed over 90 percent of marine life 252 million years ago.
I did have a restful Christmas, albeit wrapped in the warmth of Brisbane’s humidity, but in the still of the night reality has a way of breaking through. I’ll begin with the ending of this story, as it were, by quoting what Carl Sagan said about the photograph of Earth taken from Voyager 1 as it left the Solar System:
That’s here. That’s home. That’s us. On it everyone you know, everyone you love, everyone you’ve ever heard of, every human being who ever was, lived out their lives … Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity — in all this vastness — there is no hint that help will come from elsewhere to save us from ourselves.
Here’s the pic:
That’s from a article by Andrew Glikson done back in May as CO2 levels in the atmosphere of 400 parts per million were recorded by the National Oceanic and Atmospheric Administration.
Glikson highlights the changes this implies when the full effects become apparent, according to the paleo record when CO2 levels were similar in the Pliocene: Continue reading You’ve been warned!→