Guest essay by Eric Worrall
Back in 2013 I celebrated that Australia’s unusually hot, dry Summer meant a lower risk of deadly tick bites, but apparently this is now a bad thing.
Climate change could wipe out a third of parasite species, study finds
Parasites such as lice and fleas are crucial to ecosystems, scientists say, and extinctions could lead to unpredictable invasions
Thursday 7 September 2017
Climate change could wipe out a third of all parasite species on Earth, according to the most comprehensive analysis to date.
Tapeworms, roundworms, ticks, lice and fleas are feared for the diseases they cause or carry, but scientists warn that they also play a vital role in ecosystems. Major extinctions among parasites could lead to unpredictable invasions of surviving parasites into new areas, affecting wildlife and humans and making a “significant contribution” to the sixth mass extinction already under way on Earth.
The new research, published in Science Advances, used the collection of 20m parasites held at the Smithsonian Institution’s Museum of National History in the US to map the global distribution of 457 parasites. The scientists then applied a range of climate models and future scenarios and found that the average level of extinctions as habitats become unsuitable for parasites was 10% by 2070, but extinctions rose to a third if the loss of host species was also included.
“Parasites are obviously a hard sell,” said Carlson. “Even if you are grossed out by them – and there are obviously downsides for individual hosts and for humans – parasites play a huge role in ecosystems.” They provide up to 80% of the food web links in ecosystems, he said. Having a wide range of parasites in an ecosystem also means they compete with one another, which can help slow down the spread of diseases.
…
One example of the complex role parasites can play is a hairworm that lives in grasshoppers in Japan and tends to lead its host to jump into water, where the grasshoppers become a major food source for rare fish. “In some subtle ways, parasites are puppeteers,” Carlson said.
…
The abstract of the study;
Parasite biodiversity faces extinction and redistribution in a changing climate
Colin J. Carlson, Kevin R. Burgio, Eric R. Dougherty, Anna J. Phillips, Veronica M. Bueno, Christopher F. Clements, Giovanni Castaldo, Tad A. Dallas, Carrie A. Cizauskas, Graeme S. Cumming, Jorge Doña, Nyeema C. Harris, Roger Jovani, Sergey Mironov, Oliver C. Muellerklein, Heather C. Proctor and Wayne M. Getz
Climate change is a well-documented driver of both wildlife extinction and disease emergence, but the negative impacts of climate change on parasite diversity are undocumented. We compiled the most comprehensive spatially explicit data set available for parasites, projected range shifts in a changing climate, and estimated extinction rates for eight major parasite clades. On the basis of 53,133 occurrences capturing the geographic ranges of 457 parasite species, conservative model projections suggest that 5 to 10% of these species are committed to extinction by 2070 from climate-driven habitat loss alone. We find no evidence that parasites with zoonotic potential have a significantly higher potential to gain range in a changing climate, but we do find that ectoparasites (especially ticks) fare disproportionately worse than endoparasites. Accounting for host-driven coextinctions, models predict that up to 30% of parasitic worms are committed to extinction, driven by a combination of direct and indirect pressures. Despite high local extinction rates, parasite richness could still increase by an order of magnitude in some places, because species successfully tracking climate change invade temperate ecosystems and replace native species with unpredictable ecological consequences.
Read more: http://advances.sciencemag.org/content/3/9/e1602422
Sadly I see no long term drop in the number of parasites to support this claim. Many Parasites tend to have rapid life cycles. Many of them also have wide ranges, spanning significant variations in climate. This suggests a substantial ability to adapt to any plausible amount of climate change we are likely to experience in the foreseeable future.
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LOL.
Now don’t call them Parisites, they prefer Parisians
What the? Here in Canada, the statement is global warming is helping the parasites thrive…warm winters (what ever that means) does not kill them off. So how should we interpret this settled science?
Must be quantum… 🙂
Schroedinger’s tick, flea, tapeworm, etc.
When you are selling snake oil you get to make the claims you need to sell that oil.
Actually from the huge amounts of pseudo-science an alarmist crap, I can only surmise that the hype about global warming is not only allowing parasites to thrive, but it also allows the parasites to publish silly study results and continue to make ludicrous pronouncements such as the article in question.
I would think that the difference between -25 C and -22C, a warm winter, would be tough for a hibernating parasite to differentiate.
but I’m no climate scientist……
When I lived In the mountains of Colorado they use to show up in the early summer as it warmed then disappear when the temperature started to get too hot for them.
Maybe we should increase emissions to ensure the demise of these horrific creatures from hell.
The good news just keeps on rolling out of the CAGW Think Tank, no more parasites, and bigger healthier plants and trees. Keep that CO2 spilling out, Folks.,
Absolutely agree, Roy. I am positive no genuine scientist would stoop to pumping out garbage that takes one line of research & runs it through a filter composed of climate models (otherwise known as “excessively huge computer programs chock full of guesses & fudges”).
I thought the story was about the IPCC, and then I saw the tick.
When I saw the tick I thought the story was about Michael Mann.
When I saw the tick, I thought the story was about Elon Musk and his ilk of crony capitalists.
One tick, one tick over the line
Sweet Jesus!
And the difference is?
The IPCC/UNFCCC is not affected by such?
Got it.
Sorry, but I could not stop my mouse. That’s gonna leave a mark! 😉
Not so much a tick as a hockeys tick? Or just a pair of parasites?
After several minutes thinking about how fleas are possibly crucial to ecosystems, I asked the cat. She glared at me like I lost my mind.
Speaking of cats, and parasites, and losing one’s mind… the digression in the story about hairworms and grasshoppers, with the remark that, “In some subtle ways, parasites are puppeteers,” reminded me of one possible partial explanation for widespread irrational climate alarmism: maybe it’s the cats.
https://www.theatlantic.com/magazine/archive/2012/03/how-your-cat-is-making-you-crazy/308873/
Cats usually control us by simple transmission of thoughts. When they sit and stare at you, they are pushing their thoughts directly into your mind. But why would they want to make us fret about Global Warming? They like warmth.
No its actually the mice.
They control us through out the galaxy.
“These creatures you call mice, you see, they are not quite as they appear. They are merely the protrusion into our dimension of vastly hyperintelligent pandimensional beings.”
― Douglas Adams, The Hitchhiker’s Guide to the Galaxy
Lewis
then why do cats eat mice?
Well, all silliness aside many parasites lead rather convoluted life cycles and mind control (simple biological control) is actually a functional mechanism. Parasites may begin as eggs that hatch into larva on leaves that are intended to be ingested by one particular host. Subsequently the larva/worms cause the host to perform some bizarre and self destructive behavior like “jump into a stream and expose yourself to predators” or “climb out of the shadows and expose yourself to predators”. The first host then gets ingested by a secondary host where the parasite then subsequently lays its eggs. The secondary host may complete the cycle by laying eggs into the water or depositing them back onto leaves where the cycle begins again, or the cycle may pass through several more transitions and more hosts.
As long as the cycle remains in the intended hosts most of us are blissfully unaware of the horrors. When humans become involved by becoming a host bad things happen to the human. Such is the case for guinea worms.
rocket scientist:
“As long as the cycle remains in the intended hosts most of us are blissfully unaware of the horrors. When humans become involved by becoming a host bad things happen to the human. Such is the case for guinea worms.”
Noted.
It doesn’t look too hot for climate modellers, climate scenarioistas etc., either.
[NB – not ‘scientists’ . . . .]
Auto
Neologisms – sadly – are a speciality.
Any change is a bad thing, as the current environment and climate is perfect. /s
making a “significant contribution” to the sixth mass extinction already under way on Earth.
Where are the ‘Extinction List’ additions showing the 6th is underway?
Well, I haven’t seen common sense for years. . . .
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So I suppose that there are now fewer parasites in Florida than Maine? There sure is a large average temperature difference!
Similar to the silly claim that higher temperatures would make people more aggressive and violent. Didn’t go down well to people in Cairns (North Queensland) that they must be more violent and aggressive than people in Hobart (Tasmania).
Umm…….I’ve found the locals in Cairns to be a whole lot more aggressive than those in Hobart. Cairns is a good place not to be along about midnight unless you want to get some MMA practice in.
I thought the parasites were the authors.
Good one Ric, they are the parasites.
Also from he article “Parasites such as lice and fleas are crucial to ecosystems, scientists say, and extinctions could lead to unpredictable invasions.” Absolute nonsense. If every Warmunist had fleas, ticks, and lice these kind of stupid ideas would be gone by morning.
You beat me to it. I salute you.
If I am correct, humans have caused the extinction of only one arthropod pest so far, the rocky mountain locust.
More ordure from the Grauniad.
“the sixth mass extinction already under way on Earth.” I see climate science is still worshipping at the alter of drama and science fiction. If it’s a mass extinction, where are all the bodies?
Yes, “the sixth mass extinction already under way on Earth” gave me a few mental hiccups as well.
But I bet that Exxon-Mobil and the Koch brothers know where all the bodies are buried.
(Psst: the altar of science fiction.)
No, the Clintons know where all the bodies are buried.
this bit also
{ We find no evidence that parasites with zoonotic potential have a significantly higher potential to gain range in a changing climate, }
now didnt we cop a swathe of stories saying how bad climate change was going to make all those same problems??
i dont have oldtimers and i DO remember that being one of the many claims
But …but ….it’s a s l o w extinction , requiring hundreds of years … err … millions of dollars … pay up NOW !
Unfortunately no effect on Paris-ites !!
or on Gore-ites 🙁
Does this include the liberal leftist warmunists?
More modelling showing the GIGO that climate ‘scientists’ seem to find essential for their religion, I can’t call it a Profession because professionals have standards they must abide by.
“Climate change is a well-documented driver of both wildlife extinction and disease emergence”
This is the scariest result of climate change – that these people actually believe this stuff, or claim they do.
Save the ticks!
Dang! Just when I got my hopes up!
So many people are ignorant of Earth’s climate phases. During the Triassic period, the Earth was in a hothouse phase, no ice caps, no glaciers at all. Just tropical and temperate zones. Vegetation and animal life flourished. And the carbon dioxide was most likely around 1000ppm.
One can only hope.
Any risk to the parasites in D.C., Chicago, Sacramento, etc.?
I think most here would agree that extinction would be a good thing in their cases.
OK, then show us that documentation.
Models and speculation are not evidence, BTW.
It’s a Jenner genocide out there…..
Too few parasites drives the climate, 97% approved.
We need to increase the number of parasite to fight GW
The Eemian interglacial 125,000 years ago was warmer with higher sea levels than at any point in our Holocene interglacial. In between was a 116-year glacial period, with sea level over 400 feet lower than now. Why oh why didn’t the greater warmth and profound cold kill off these fragile mites. Now we are in the coldest 10% of the Holocene interglacial and the little buggers finally are threatened? What do these scientists know that these pests don’t? I’ll hang on to my Raid a while longer.