Professor Corey Bradshaw explains the unfolding “Extinction Cascades” on Nature Bats Last.

Professor Corey Bradshaw from Flinders University was this months guest on Nature Bats Last.

The audio of the episode is embedded here:

“Dr. Bradshaw is the Matthew Flinders Fellow in Global Ecology at Flinders University, where he directs the Global Ecology Laboratory and is also Chief Investigator of the ARC Centre of Excellence for Australian Biodiversity and Heritage. He heads the Flinders Modelling Node of the latter organization. Professor Bradshaw has published some 300 peer-reviewed scientific articles, 11 book chapters and 3 books. His book titles include The Effective Scientist, published by Cambridge University Press and, from Chicago University Press and co-authored by occasional guest on this show Professor Paul Ehrlich, Killing the Koala and Poisoning the Prairie. In total, his work has been cited more than 20,000 times. Bradshaw is co-Head of the Ecology Section of the Faculty of 1000 and a Fellow of the Royal Society of South Australia. He was awarded the 2017 Verco Medal from the Royal Society of South Australia, a 2017 Rockefeller Foundation ‘Bellagio’ Writer’s Fellowship, the 2010 Australian Ecology Research Award from the Ecological Society of Australia, the 2010 Scopus Young Researcher of the Year, the 2009 HG Andrewartha Medal, and a 2008 Young Tall Poppy Science Award. He is regularly featured in Australian and international media for his research. The Professor’s blog has been visited more than 2.3 million times.” Quoting  Professor Guy McPherson

Links to Professor Bradshaw’s published works are embedded here, his personal blog with a subscription option is Conservation Bytes 

“More than 99% of all species that have ever existed have gone extinct”. See the short presentation at the top of the Professor Bradshaw’s blog for more on that diamond of information and lets get over our human hubris and invincibility.
We have previously discussed on the show Professor Bradshaw’s work with Professor Paul Ehlich. That episode is embedded in the following link: Professor Paul Ehrlich returns to Nature Bats Last
Until recently I assumed that at least Tardigrades would get through the extinction bottleneck. That has recently be called into question as we discussed on the show and  below;
“Tardigrades are tough little critters. When conditions get nasty, they can dry out, reconfigure their bodies and enter suspended animation – called dessication – for years. You can throw virtually anything at them: frozen temperatures, zero oxygen, high pressures, the vacuum of space, cosmic radiation, and even being boiled.”

“But new research has shown these tiny organisms may have a weakness – long-term exposure to high temperatures, even in their dessicated state. The longer the temperatures are maintained, the lower the tardigrades’ chances of survival.”
Tardigrades Are Basically Indestructible, But Scientists Just Found Their Weak Point

In the following embedded Flinders University presentation Professor Bradshaw jokes that his colleagues describe him as Dr or Professor Doom. This subtle form of gas lighting has stoked scientific reticence as the extinction event accelerates, discouraging the less courageous scientists from telling you what they really think is unfolding. Professor Guy McPherson and I admire Professor Bradshaw’s courage, professionalism and scientific integrity. BRAVE | There’s No Plan(et) B – What you can do about Earth’s extinction emergency.

Carl Sagan Extinction is the rule.

Professor Bradshaw and I discussed the Great Barrier Reef in Australia. Embedded below is the trailer to a new documentary titled “Murder On The Reef”

All my time at sea over 16 ‘blue water’ passages and hundreds of races taught me the importance of the “Precautionary Principal”. The prudent skipper needs a wide margin of error. Caution and prudence seems to have been cast to the wind as the dominant culture grinds the living planet into dust.
Next months guest will be Jeff Gibbs, director of “Planet of the Humans” recently censored off You Tube for daring to question the renewables sector.

I'm an anti-imperialist, environmental activist and blue ocean sailor, who is passionate about the earth and all it's inhabitants without favour. Brace for imminent impact as we bare witness to the non-linear unraveling of the biosphere and habitability disappearing for most if not all complex life on the only habitable planet we know of. To quote President Niinistö in North Russia: ‘If We Lose the Arctic, We Lose the World’. Folks we have lost the Arctic.

Posted in Abrupt Climate Change, Corey Bradshaw, Extinction Cascades, Extinction Rebellion, Jeff Gibbs, Nature Bats Last, Professor Guy McPherson, Professor Paul Ehrlich, The Great Barrier Reef
78 comments on “Professor Corey Bradshaw explains the unfolding “Extinction Cascades” on Nature Bats Last.
  1. Haiku Blue says:

    All in your tribe to educate are so informative. Much gratitude !

    Sent from Yahoo Mail on Android

    Liked by 1 person

  2. Kevin Hester says:

    “Funding dried up after inconvenient truths”.
    One of the reasons why so few scientists are prepared to tell the truth, the whole truth and nothing but the truth is access to research funding. Recent guests on Nature Bats Last including Professors Paul Ehrlich and Dr Andrew Glikson from the ANU are near the end of their careers and have the courage to call it as my co-host Professor Guy McPherson and Sam Carana from the Arctic News Blog do.
    Another reason is no scientists wants to get tarred with the ‘Doomer’ label as we discussed with our most recent guest on the show Professor Corey Bradshaw.
    Scientific reticence has ensured that the dominant culture has been able to kick the can and the biosphere off the cliff.
    “Schellnhuber said in a recent interview that the IPCC report stating we could stay below 1.5°C of warming was “slightly dishonest” because it relies on immense negative emissions (pulling CO2 out of the air) which was not viable at global scale. He said 1.5°C was no longer achievable but it was still possible to stay under 2°C with massive changes to society.”
    Professor Hans Joachim Schellnhuber in this article is playing ‘fast and loose’ with the actual level of warming we have already experienced. If you go back to 1750 as a baseline we are already past 2C.
    At the edge of extinction only a handful of courageous scientists and researchers like me are willing to tell you the truth.
    I’ll be surprised if this set of living arrangements survives 2 more melt seasons in the Arctic, that equates to about 18 months.


  3. Kevin Hester says:

    Two of the authors of this latest paper Geraldo Ceballos and Paul Ehrlich are former guests on Nature Bats Last.
    I expect the crisis to escalate faster than this paper implies because of the ‘Extinction cascades’ that we discussed with Professor Corey Bradshaw on the show.
    Does anyone else want to write to Geraldo Ceballos and let him know that we are in the 7th great extinction?


  4. Nikki says:

    From cascade to avalanche

    Liked by 1 person

  5. Kevin Hester says:

    ‘Emergence of cascading dynamics in interacting tipping elements of ecology and climate’


  6. Kevin Hester says:

    “Humans wiping out wildlife at an ‘unprecedented’ rate, WWF report finds
    Agriculture and the illegal wildlife trade are the main drivers as WWF calls on people to eat less meat.”


  7. Kevin Hester says:

    Professor McPherson’s latest peer reviewed paper cites the work of Professor Bradshaw;


  8. Kevin Hester says:

    Don’t be surprised if this is part of an extinction cascade. These migratory birds fill an important role in the food chain and seed disbursal.


  9. Kevin Hester says:

    “From this study, we can conclude that active tardigrades are vulnerable to high temperatures, though it seems that these critters would be able to acclimatise to increasing temperatures in their natural habitat,” Neve said.

    “Desiccated tardigrades are much more resilient and can endure temperatures much higher than those endured by active tardigrades. However, exposure-time is clearly a limiting factor that constrains their tolerance to high temperatures.”

    The research has been published in Scientific Reports.


  10. Kevin Hester says:

    Less and less I feel like a lone voice crying in the wilderness.
    The unfolding extinction crisis is more obvious by the day.


  11. Kevin Hester says:

    Losing this species either entirely or to a large degree will have a negative effect on many of the other species in the marine food web. Their faeces provide fertiliser that is metabolised by species lower down the food chain.
    This is how extinction cascades unfold. Lose one, begin a chain reaction.


  12. Kevin Hester says:

    “Freshwater fish are under threat, with as many as a third of global populations in danger of extinction, according to an assessment.”

    “Populations of migratory freshwater fish have plummeted by 76% since 1970, and large fish – those weighing more than 30kg – have been all but wiped out in most rivers. The global population of megafish down by 94%, and 16 freshwater fish species were declared extinct last year.”


  13. Kevin Hester says:

    “But the loss of a key urchin predator, the sunflower sea star, due to sea star wasting disease left the kelp forests of Northern California without any predators of sea urchins, which are voracious grazers of kelp.”
    The loss of one species can trigger an extinction cascade as Professor Corey Bradshaw described in his paper on the subject.


  14. Kevin Hester says:

    This video was made 6 yrs ago, there have been plenty of extinction cascades since.


  15. Kevin Hester says:

    “All complex life depends on oxygen. It’s the support system for aquatic food webs. And when you start losing oxygen, you have the potential to lose species,” said Kevin Rose , author and professor at Rensselaer Polytechnic Institute. “Lakes are losing oxygen 2.75-9.3 times faster than the oceans, a decline that will have impacts throughout the ecosystem.”


  16. Kevin Hester says:

    Courtesy of Shannon Rooney:
    “We know animals can die when temperatures rise to extremes they cannot endure. However, our research suggests males of some species can become infertile even at less extreme temperatures.”

    “This means the distribution of species may be limited by the temperatures at which they can reproduce, rather than the temperatures at which they can survive.”


  17. Worldwide existential threat even though the link was about AUS… And nothing changes but for the worse!

    Worldwide ecocide. This is insane.

    In this country our ‘new’ (ancient old corrupt neoliberal corporate right winger) ‘oh so progressive climate-aware’ president who was elected because…he wasn’t Trump….is doing exactly what I predicted he would do because I based my thinking on HIS GODDAMNED PUBLIC RECORD of what he supported and what he actually did over the past decades.

    He is Trump, just a Trump-lite form of that dickweed pansy-ass frat boy Fascist billionaire. Our new president earned his nickname of Senator Mastercard from Delaware…

    His campaign promise of ‘doing something about climate ‘change’ has obviously turned into that secret meeting with the rich that went public where he promised them nothing substantial will change. Guess which promise he has kept?

    The Biden (BUY-dems) administration is now on track to approve MORE OIL & GAS LEASING ON PUBLIC LANDS THAN OBAMA (who was absolutely horrible) OR TRUMP (who was even worse). Looks like Buy-dem has been bought, eh? No surprise there!

    I had arguments with friends of mine over this asshole who became visibly upset with me for the documented information I was giving them because it didn’t fit what they wanted to hear. Trump derangement syndrome? They literally had their metaphorical hands over their ears while yelling LA-LA-LA-LA at me.

    Now it’s my turn to say “I TOLD YOU SO” which will probably piss these democrats off even more. A couple at least have recently (very sad-faced) told me I was correct in my assessment of Biden. The Rethuglican Fascist Party is going to take the government back over soon and with all the vote fraud going on that the Democrats are NOT addressing, there might not ever be another election. Not that we actually have those anyway, ya know? When all you are allowed is to vote for one of two pre-approved candidates funded by they same people it really isn’t an election.

    I have almost finished ‘Dime’s Worth of Difference’ Beyond Lesser Evil Voting’ by counterpunch creators. A couple years old and it nails why voting Democan or Republicrat will NEVER change a damned thing.

    The US is a Fascist Corporate Oligarchy, classic inverted totalitarianism. And there is nothing going to stop the complete destruction of the biosphere by the Capitalist corporation owners because this is a world-spanning empire with tentacles in damned near every government.

    My oldest friend DP in the Islands has been describing the death of the coral on Windward Side of O’ahu where he’s out on the reefs more than he is on the beach. It’s dead white for a mile offshore or more, And there are no large pollution sources on that side of the island. No factories etc etc. But it’s bleaching anyway. Heat death.

    And here? The logging continues. There aren’t any other jobs for the young low-education I live among. And there really aren’t all that many jobs down in the city for them, either. Automation and offshoring to low wage slave countries works when all you want is higher profits!

    So the on-going clear-cut hills will continue to shed what little rain we get and the aquifers beneath our feet will continue to drain and…nothing will change but for the worse. There are far fewer insects around because I used to be able to look off the porch and see huge clouds of them buzzing around in the beams of sunlight. Not so many anymore, and far fewer species visible like butterflies that are nearly extinct here compared to even ten years ago. I see a couple here and there, solitary ones not the clouds of them one could walk through. I’m noticing a distinct drop at night as there are less moths and other night bugs attracted to the lighted windows. I don’t keep lights on outside at all unless I’m doing something so the property goes very dark after sunset.

    It’s been so hot that the mama robin that built her nest under my porch roof abandoned the three eggs in it. Swallow babies leaped to their death from the birdhouse hanging from another roof. Death of the biosphere.


    Liked by 1 person

  18. Kevin Hester says:

    This is exactly how we end up with “Extinction Cascades”.

    Baked barnacles, scorched cherries: the disastrous impact of heatwaves on plants and animals


  19. Read this today on RSN. Being an ocean-born & raised surfer I can’t even picture this. EVERYTHING is dead? Kelp, barnacles, everything in shallow water just cooked to death? Holy shit.

    Baked Barnacles, Scorched Cherries: The Disastrous Impact of Heatwaves on Plants and Animals

    By Gabrielle Canon, Guardian UK

    01 August 21

    More than a billion sea creatures across the Pacific north-west perished in this year’s heatwave. And it’s just a taste of what’s to come

    When forecasts foreshadowed the Pacific north-west’s devastating heatwave at the end of June, marine biologist Christopher Harley was alarmed and intrigued.

    Then came the smell, and his feelings somberly shifted…continued at link.

    Weather has shifted to expected lightning-bearing T storms cloud masses rolling through. Splatters of raindrops but no more than 1/10th of an inch predicted except for short downpours from those massed.

    It was 82’F at 1am last night as the calendar turned over to the first day of August. It is 82’F right now at 3:30pm. Today is the lowest temperature I’ve recorded since 17June…


    Liked by 1 person

  20. Cascading effects…this article really sticks a shiv into the worldwide outlook. Large scale shifts and it’s all going faster…relentless…all sorts of interesting words used here. Links to studies are all through this one. Ugh.

    But hey, billionaires almost in space inside rocketships (they weren’t actually IN outer space) that were incredible…ummmm…vibrant copies of giant dildos…

    In a Summer of Deadly Deluges, New Research Shows How Global Warming Fuels Flooding

    New attribution research shows that climate change primed the pump and increased the odds of deadly July floods in northwestern Europe.

    And this one shows the attitude I run into constantly-except for a few people that are paying attention. Being as the author is a dirt farmer in rural Maine watching his town being gentrified with more roads and highways…

    Ruralist Lament: More Fire, Less Ice

    “It’s just guaranteed to get worse…..Nowhere to run, nowhere to hide.”

    – Linda Means, co-author IPCC report

    What if an existential crisis came knocking and nobody cared?

    Sure isn’t much fun reading available in any of the sites I pop into, Kevin. Literally not a speck of actual good news beyond the ‘hope’ that this or that can make any kind of difference. I do seem to be reading more about the concept of somehow ‘mitigating’ what is happening from a number of different sources but even then it’s not real if you get my meaning. Too little too late obviously, at least in how I view the world. Pretty cynically I will admit.

    And since we have a planetful of people who just do NOT want to hear about it along with they don’t even want to think about what is happening or lessening the impacts by shifting their own lifestyle choices, the odds of ‘mitigating’ the on-going slide into ever-more desperate…ummmm, living conditions (how’s that for polite wording?) around the planet becomes somewhat of a joke. Not a very good joke, though.

    And here is Madagascar:

    ‘Unprecedented’: Madagascar on Verge of World’s First Climate-Fueled Famine

    “These people have done nothing to contribute to climate change,” said one U.N. official. “They don’t burn fossil fuels… and yet they are bearing the brunt of climate change.”

    Too much to process, Kevin, Makes my head hurt. Literally. And some days the center of my chest gets this heavy lump feeling to it when I try to gather all the threads together. Big sigh.


    Liked by 1 person

  21. Kevin Hester says:

    A classic example of introducing one species that can put an entire ecosystem at risk.
    Ulli and I had a wonderful experience with Hippo’s in Uganda.


  22. Kevin Hester says:

    “Species expanding their range include the emperor dragonfly, migrant hawker, ruddy darter, black-tailed skimmer and small red-eyed damselfly.”

    “In contrast, some upland and northern dragonflies are in retreat, including the common hawker and black darter, perhaps because of the loss of peatbogs or extreme droughts.”

    “The increase in many species, if not all, we can put down to a combination of climate warming and more or better wetland habitats such as an increase in the number of ponds, lakes, gravel-pits and reservoirs in recent decades,” said Dave Smallshire, co-editor of the report.”

    “But people should not get the message that all is “tickety-boo with dragonflies”, he added.

    “The overwhelming message is that global climate change – and in the case of Britain and Ireland – significant climate warming is likely to have had an over-riding effect on many of these changes,” he said.”


  23. Kevin Hester says:

    Guy’s latest includes a discussion of the Strona and Bradshaw paper embedded in the above link.


    • Today:

      ‘Delay Is the New Denial’: Study Confirms 99.9% of Scientists Agree on Climate

      Not something we figured out already from reading I guess. What a bummer this is. And nothing is going to change except for the worst because…there is money to be made!

      Huzzah Huzzah! Everybody loves money, right?

      Incredible moon out the east window at the moment, Literally coming up over the ridgeline as I type this. Crystal clear sky no clouds. Tomorrow it’s full but supposedly there is a storm coming in. End of October and it’s in the 23C daily but frosting in the early mornings. It used to be snowing this time of year at least a little bit. The higher mountains are still completely bare…


      Liked by 1 person

    • Well hell, the 8Nov link shows the ocean critters are doing exactly what the land critters (us) are doing, moving the hell north to get away from the increasing heat spreading out from the equator. Notice the crowds at the US southern borderThat certainly isn’t any surprise! Since more of the heat has already been absorbed by the Even the Maine lobsters are heading north for cooler waters in the Atlantic… Extinction event in the ocean as bad as the land critters? Harder to measure I guess. And the plankton species are disappearing. Permanent altered is not two words I like hearing, and he says the “oceans are dying.” Nothing is going to change, not our species. Our trajectory is set.

      I did recently read (did I post this here somewhere?) that tropical fish species are being caught off of San Diego. Ones never seen before. And I think I’ve mentioned that my partner DP on Windward Side of O’ahu is watching the coral die off. He’s saying at least a mile out now, white dead everywhere.

      More houses are being built in these mountains, more southern state license plates on vehicles showing up, more southern accents mouth-full-of-cotton being heard along with the non-accents of California/Oregon/Arizona/Nevada,

      But wait, aren’t there border walls in the ocean to keep those ‘other’ fish from crowding out the northern fish like us critters seem to like so well? We’re stuck in the hot air so we all need to climb farther up the mountains…oh wait we can’t grow food on top of mountains! And we’ve got the Canadian Border.

      Big sigh. 20 minutes of an ocean doom talk is about all I can take at the moment. So I’ll leave you with this link:

      Sorry, But It’s Time To Stop Flying

      The comment section is rather depressing to read…


      Liked by 1 person

  24. 16 Nov vid post: didn’t like his opening IPCC booster speech though he did qualify it by calling the IPCC ‘cautiously conservative.’ But he doesn’t really break down the real reasons that have already been discussed at length here in other posts that rips holes in their message due to political/corporate corruption…

    Now I’m bothered at 5:30 by calling for the comparison of CO2 pre-industrial levels but why does the graph on the screen starts at 1900 not 1750? That is rather disingenuous as it tells the listener that 300ppm was the starting point and that isn’t true!

    Two strikes against this vid already in five minutes with 42 minutes to go? I’m not sure I want to keep listening but I’ll give him the benefit of the doubt and continue later.

    How ‘Low Carbon’ Energy Became the New ‘Low Tar’ Cigarette

    What are these low carbon solutions? Largely natural gas, which as science has repeatedly shown, is roughly as bad for the climate as coal when methane leaks and total emissions are added to the equation.

    Ya know, whomever invented the term ‘natural gas’ for the burning of methane is right up there with Frank Luntz the inventer of climate ‘change’ for deflecting reality using words to hide the reality.


    Liked by 1 person

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Kevin Hester

Kevin Hester is currently living on Rakino Island, a small island in the Hauraki Gulf near Auckland, New Zealand, monitoring the unravelling of the biosphere and volunteering at the Rakino Island Nursery is currently developing a proposal to create a marine reserve near by. The Island has no grid tied electricity or reticulated water.  I catch my own water from the roof and generate my electricity from the ample solar radiation on the island.

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