Claim: Global Warming will Shrink Animals

Guest essay by Eric Worrall

Recycled climate wisdom from Seth Borenstein…

Global warming shrank animals in the past. Scientists say it could happen again.

Seth Borenstein, Associated Press

WASHINGTON — Global warming shrank certain animals in the ancient past, and scientists worry it could happen again.

Warm-blooded animals got smaller at least twice in Earth’s history when carbon dioxide levels soared and temperatures spiked as part of a natural warming, a new study says.

University of New Hampshire researcher Abigail D’Ambrosia warned that mammals — but not people — could shrivel in the future under even faster man-made warming.

“It’s something we need to keep an eye out for,” said D’Ambrosia, who led the new work. “The question is how fast are we going to see these changes.”

Read more: https://amp.usatoday.com/story/99345782/

The abstract of the study;

Repetitive mammalian dwarfing during ancient greenhouse warming events

Abigail R. D’Ambrosia1, William C. Clyde, Henry C. Fricke, Philip D. Gingerich and Hemmo A. Abels

Abrupt perturbations of the global carbon cycle during the early Eocene are associated with rapid global warming events, which are analogous in many ways to present greenhouse warming. Mammal dwarfing has been observed, along with other changes in community structure, during the largest of these ancient global warming events, known as the Paleocene-Eocene Thermal Maximum [PETM; ~56 million years ago (Ma)]. We show that mammalian dwarfing accompanied the subsequent, smaller-magnitude warming event known as Eocene Thermal Maximum 2 [ETM2 (~53 Ma)]. Statistically significant decrease in body size during ETM2 is observed in two of four taxonomic groups analyzed in this study and is most clearly observed in early equids (horses). During ETM2, the best-sampled lineage of equids decreased in size by ~14%, as opposed to ~30% during the PETM. Thus, dwarfing appears to be a common evolutionary response of some mammals during past global warming events, and the extent of dwarfing seems related to the magnitude of the event.

Read more: http://advances.sciencemag.org/content/3/3/e1601430.full

Shrinking animals is one of my favourite climate scare stories. The fear of climate shrinking animals has such a camp 1980s science fiction feel, but what they are actually talking about is a very gradual process which took place over a prolonged period – certainly not something a person could “keep an eye on” over any reasonable timeframe.

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95 thoughts on “Claim: Global Warming will Shrink Animals

  1. Wasn’t this period in proximity to the “dinosaur killer” asteroid? Wasn’t there some discussion not long ago about the Deccan Traps and such? Could there be remnant effects going into the PETM that might better explain shrinking mammals?

  2. The reality is that the climate change we have been experiending is caused by the sun and the oceans over which mankind has no control. There is no real evidence that CO2 has any effect on climate and there is plenty of scientific rational to support the idea that the climate sensivity of CO2 is zero. The AGW conjecture is dependent upon a radiant greenhouse effect caused by trace gases with LWIR absorption bands. Such a greenhouse effect has not been observed in a real greenhouse, on Earth, or anywhere else in the solar system for that matter. The radiant greenhoue effect is science fiction as is the AGW conjecture.
    Considering what has been learned from the paleoclimate record. we are most likely nearing the end of the current interglacial period. It is very unlikly that temperatures will increase to equal what they were during the previous interglacial period. The next ice age will probably last at least 100K years just like tha last one so we will not have to worry about warmer temperatures shinking animals for at least anothe 100K years. Many of reading this may not be alive to experience the next interglacial period.

    • Suprise, the artical said that there were warmings back then, & that they were similar to the presant day warmings.
      So how come, where did the man made co2 come from ?.
      Mj

      • There is evidence that the burning of fossil fuels has increased the amount of CO2 in the Earth’s atmosphere but there is no real evidence that this additional CO2 has had any effect on climate.

      • To Willhaas’s Comment.
        No, there is no evidence that we have added CO2 to the atmosphere. Our Co2 emissions have gone up logarithmically while CO2 in the atmosphere has risen linearly. We are having no effect.

      • higley7 – March 23, 2018 at 5:08 am

        Our Co2 emissions have gone up logarithmically while CO2 in the atmosphere has risen linearly. We are having no effect.

        Right you are, higley7, ……. but 80+% of the educated populace avert both their eyes and their mind to that fact.
        I had previously compiled the following statistics via reliable sources, to wit:
        Increases in World Population & Atmospheric CO2 by Decade
        year — world popul. – % incr. — Dec CO2 ppm – % incr. — avg increase/year
        1940 – 2,300,000,000 est. ___ ____ 300 ppm est.
        1950 – 2,556,000,053 – 11.1% ____ 310 ppm – 3.3% —— 1.0 ppm/year
        1960 – 3,039,451,023 – 18.9% ____ 316 ppm – 1.9% —— 0.6 ppm/year
        1970 – 3,706,618,163 – 21.9% ____ 325 ppm – 2.8% —— 0.9 ppm/year
        1980 – 4,453,831,714 – 20.1% ____ 338 ppm – 4.0% —– 1.3 ppm/year
        1990 – 5,278,639,789 – 18.5% ____ 354 ppm – 4.7% —– 1.6 ppm/year
        2000 – 6,082,966,429 – 15.2% ____ 369 ppm – 4.2% —– 1.5 ppm/year
        2010 – 6,809,972,000 – 11.9% ____ 389 ppm – 5.4% —– 2.0 ppm/year
        2012 – 7,057,075,000 – 3.62% ____ 394 ppm – 1.3% —– 2.5 ppm/year
        Source CO2 ppm: ftp://aftp.cmdl.noaa.gov/products/trends/co2/co2_mm_mlo.txt
        Based on the above statistics, to wit:
        Fact #1 – In 70 years – world population increased 207% – CO2 increased 31.3%
        Fact #2 – Atmospheric CO2 has been steadily and consistently increasing at a rate of 1 to 2 ppm per year for the past 70 years, …… whereas human generated CO2 releases have been increasing exponentially every year for the past 70 years.
        Fact #3 – Global Average Temperature calculation results have been steadily and consistently increasing a few hundredths or tenths of a degree for the past 70 years, ……. whereas human created infrastructure, housing, vehicles, etc. (Heat Islands) have been increasing exponentially every year for the past 70 years.
        Conclusions:
        Given the above statistics, it appears to me to be quite obvious that for the past 70 years there is absolutely no direct association or correlation between:
        Increases in atmospheric CO2 ppm and world population increases.
        Increases in Average Global Temperature and world population increases.
        Increases in Average Global Temperature and Heat Islands construction increases.
        Increases in Average Global Temperature and atmospheric CO2 ppm increases.
        But then of course, …… I am not looking through Rose Colored Glasses.

      • Samuel – So urban heat islands are causing global warming? I guess that means that city-dwellers will be the first to shrivel.
        You are aware, aren’t you, that the UHI is taken into effect in temperature measurements?
        You don’t seem to be aware of how much CO2 ends up in the ocean or plant material or that temperature is not expected to have a linear correlation with CO2. That kills most of your argument. Nor has there been anything yet discovered to account for the rise in temperature except CO2.
        Anything can seem obvious when its based on erroneous assumptions.
        Higley: “No, there is no evidence that we have added CO2 to the atmosphere. Our Co2 emissions have gone up logarithmically while CO2 in the atmosphere has risen linearly. We are having no effect.”
        You’re kidding, right?

      • Kristi Silber March 23, 2018 at 2:39 pm
        When GISS was finally forced by FOIA suits to reveal its previously secret UHI adjustments, it was discovered that the bogus book cooking made the adjusted temperatures hotter rather than cooler.

      • Kristi, we have examined the studies where they claim to be taking UHI into account.
        They aren’t. UHI is way underestimated.

      • Kristi Silber – March 23, 2018 at 2:39 pm

        Samuel – So urban heat islands are causing global warming? I guess that means that city-dwellers will be the first to shrivel.

        Kristi, ….. iffen the above post was your 1st attempt at trying to impress everyone with your recently acquired “educational expertise”, ……. me thinks you surely have impressed them, ….. but CONTRARY to what you were hoping for.
        Kristi, ….. iffen you want to claim that UHIs are causing global warming, …. then that is testimony of your science ignorance, …… and it was disingenuous of you to be asking me if I agree with you.
        March 23, 2018 at 2:39 pm

        You are aware, aren’t you, that the UHI is taken into effect in temperature measurements?

        Kristi, iffen I rule out your lack of “educational expertise”, ….. then I hafta say that I truly believe that you have posted on the wrong forum than what you intended to post on. Apparently you don’t realize that one of the primary reasons that this web site exists is that US government agencies were including the extremely high “local” UHI recorded temperatures as being the “normal” near-surface temperature in order to justify their “junk-science” claims in support of CAGW.

  3. “Shrivel”? Doesn’t that happen when something wrinkles and contracts due to lost of moisture, like when flowers shrivel up? Are all mammals in the future going to be tiny and shrivelled?

    • “Shrivel”! Odd word, huh? Like grapes!
      “There is no real evidence that CO2 has any effect on climate and there is plenty of scientific rational to support the idea that the climate sensivity of CO2 is zero. The AGW conjecture is dependent upon a radiant greenhouse effect caused by trace gases with LWIR absorption bands. Such a greenhouse effect has not been observed in a real greenhouse, on Earth, or anywhere else in the solar system for that matter. The radiant greenhoue effect is science fiction as is the AGW conjecture.”
      Another VERY broken record. How many times do people have to say the same things? Sounds like you are trying to convince yourselves. Helps if you have no knowledge of what you’re talking about. “Such an effect has not been observed in a real greenhouse” – true! That’s because “greenhouse” is a metaphor. CO2 has three major absorption bands, one in near IR, one in IR and one in LWIR.
      This site talks about the atmosphere of Venus, which is mostly CO2, But there’s also a nice wee demonstration of how CO2 can trap heat.
      https://scholarsandrogues.com/2011/05/06/venus-climate-v-co2-heating/

      • Quote *Helps if you have no knowledge of what you’re talking about*.
        Said like a good little narcissist.

      • But Luboš is a well-known misogyne writing a blog, so we can ignore him. Besides, he’s not a climate scientist so he’s not competent. Wikipedia tells Venus is hot due to the greenhouse effect, so we can safely ignore this denler. Actually his blog should be blocked from google for continuous dissemination of untruths. I’ll check my facts at the SkS. They told me Luboš is just a paid oil shill whom they banned already.
        Do I need tags?

      • mikebartnz March 22, 2018 at 8:49 pm
        Quote *Helps if you have no knowledge of what you’re talking about*.
        Said like a good little narcissist.
        Narcissist? That’s odd. I wasn’t saying anything about myself. I can see “catty,” “rude” or “obnoxious,” but narcissist?
        (I am sorry for that. I just get so sick of hearing that same thing over and over. Is there nothing original to say?)
        tsk tsk
        “And what is the Venusian temperature at the equivalent Earth sea-level pressure? About 350K? Huh.”
        The surface temperature of Venus is 735 K. I don’t know what you mean by “at the equivalent…” How is that relevant?
        Sagan apparently didn’t know the atmospheric composition when he wrote his paper since he didn’t know the correction for CO2. Frankly I don’t understand how an adiabatic process would apply.
        Doesn’t that refer to the change in temperature with pressure? Physics wasn’t my strong point.
        If the whole atmosphere of Venus were N2, how would the surface retain heat? What difference woul pressure make if N2 doesn’t absorb IR? Even though the rotation of Venus is 200+ days, the whole surface is hot because the atmosphere holds so much heat in.
        The other paper looks sketchy to me. “So CO2 and N2, treated as ideal gases, have the same molar heat. ” They don’t have the same molar heat, but more important, they don’t absorb energy the same. …I don’t know, I’m not qualified to assess the whole thing, but it seems like there are some assumptions made, and I’m always wary of those unless I understand them. Besides, I’ve looked at half a dozen astronomy sites and they all say greenhouse effect.

        • Quote *That’s odd. I wasn’t saying anything about myself.*
          You don’t have to be saying anything about yourself to be a narcissist. Narcissists will often put others down to make themselves look better.

  4. Now this even I think is silly! It may happen, but over the course of at least hundreds of years (maybe thousands, depending on many factors) in the case of large mammals, and it’s not something to worry about.
    DJ Hawkins: “Wasn’t this period in proximity to the “dinosaur killer” asteroid? Wasn’t there some discussion not long ago about the Deccan Traps and such?”
    What are Deccan Traps?
    This would have been after the dinosaur extinction.
    Size in mammals is related to their ability to dissipate heat. After the “dinosaur killer” asteroid, the Earth cooled, allowing the radiation of mammals into new niches as well as their increase in size. It makes sense that populations exposed to significant warming would experience decreasing body size, too. But there is nothing I can think of that is very scary about this.
    “University of New Hampshire researcher Abigail D’Ambrosia warned that mammals — but not people — could shrivel in the future under even faster man-made warming.” I wonder why not humans?

    • “I wonder why not humans?”
      A protein rich rich diet in childhood and teen years ensures full growth potential. Human populations do shrink under war-time like deprivations of calories and protein. The Japanese male height was considerably constrained between to 1950 by Imperial decrees and maintenance of strict meat rationing. After WW2, look what happened by 1950 onward…
      https://cdn-ak.f.st-hatena.com/images/fotolife/n/nbakki/20140530/20140530123635.jpg
      Yes, Animals are tasty. Yum. Just finished my T-bone steak dinner and the puppy dogs are in the backyard enjoying the bones and some remaining bovine flesh.

      • Joel, I wonder if Lysenko managed to shrink any Russians during his reign as ‘minister of genetics’…

      • I’m 6″ taller than my dad, and my son is 6″ taller than me, and none of us ever lacked for good nutrition.

      • Joel, nutrition wouldn’t explain why humans wouldn’t evolve in response to heat – that’s what “adaptation” means here. We can sweat, unlike other animals, but that doesn’t help when the heat and humidity are too high…hmmm, maybe there’s a cost of losing surface area even if surface area/volume goes up.

    • Kristi Silber – March 22, 2018 at 7:37 pm

      This would have been after the dinosaur extinction.
      Size in mammals is related to their ability to dissipate heat/b<. After the “dinosaur killer” asteroid, the Earth cooled, allowing the radiation of mammals into new niches as well as their increase in size. It makes sense that populations exposed to significant warming would experience decreasing body size, too.

      Kristi Silber, …… your mimicry of “tripe n’ piffle” is making you look as foolish as most any other learning disabled person, so best you cease n’ desist before your creditability is completely destroyed.
      Kristi S, didn’t you know that the currently calculated Global Average Temperature is accepted to be 57.2 degrees F (11.5 degrees C)?
      Kristi S, it’s obvious that you didn’t know that the proxy calculated Global Average Temperature during the Age of the Dinosaurs, 252 mya – 66 mya, is accepted to be 77 degrees F (25 degrees C.
      So “DUH”, during the Age of the Dinosaurs when the earth was populated with gigantic size land animals the average temperature was 19.8 degrees F warmer than it has been during the past 200,000+ years.

  5. Shrinking critters ….. so opossums will become rats, rats become mice, and mice will now infest your cat and maybe cross breed with the fleas. And to top it all off, we’ll never be able to find the elephant in the room! Got it!

  6. 1) The association between pertubations in carbon and changes in temperatures are assumed, not proven. Especially given the extremely poor correlations between the timing of the two events.
    2) There are many things that affect animal evolution. Once again they are assuming the poor correlation between two events proves causation.
    This isn’t science.

  7. I would have thought fifties bad science fiction, or did that just run to giant bugs caused by fallout?

    • Really big insects/spiders require more oxygen in the atmosphere. So no amount of radiation can do it.
      It also has to do with the amount of predation. There were lots of very big insects in New Zealand until the maori brought the Polynesian Rat Rattus exulans. Not many left now. Google “Giant Wetas”.

    • For fifties bad science fiction related to this topic see “The Incredible Shrinking Man” (1957)

  8. When they bring back a T-Rex, they can just leave it outside to shrink, before bringing it inside to eat them.

  9. I have a friend. One of his eyeballs shrank, and had to be reinflated, actually, re-lubricated. Now I realize man-made climate change was behind my friend’s shrunken eyeball. I don’t know if it will affect his other eyeball, but I’m gonna keep an eye out for it, I can tell ya.

  10. Gee whizzikers, how do these guys account for mammoths and mastodons, giant sloths and them there big ol’ short-faced cave bears? And what about the buffalo?
    Doom on you! Doom on you! Doom on you!
    I can’t believe these people get paid to make these pronouncements. Why don’t they tell us what their REAL issue is….? I’m breathless with anticipation over the answer to that one.

    • Twas Climate Change spelled the end of the Mega Fauna.
      And as it has warmed since the great prairie herds of 1850, obviously Climate Change is to blame for Buffalo reductions.
      The climate has changed so radically since 1850 that every person alive at that time couldn’t survive to today. Climate Change must be stopped so people can start living longer lives again.

    • Wouldn’t have anything to do with humans eating them, now, would it? Nah! that’s too easy!
      Still doesn’t explain how horses went from eohippus, the size of a cat with five toes, to the Shire, the largest draft horse breed at 18 to 22 hands with hooves the size of dinner plates.

      • It is much more common for animal lineages to grow gradually larger than gradually smaller. The largest forms however also tend do become extinct more often than small ones, so it starts all over again. Nobody knows quite why.

      • tty – sexual selection leading to unsustainable mass during geological periods of stress? I can see how climate or other environmental changes might be harder on animals that need larger areas for a sustainable population. If size is correlated with age of reproduction or negatively with birthrate it might take larger animals longer to adapt to change. Just some ideas.

      • Sexual selection is probably part of the answer. However in that case one would expect marked sexual dimorphism. This is true for some large animals (e. g. Sea elephants and Sealions), but not for most large animals.

      • “Sexual selection is probably part of the answer. However in that case one would expect marked sexual dimorphism. This is true for some large animals (e. g. Sea elephants and Sealions), but not for most large animals.” I would have thought otherwise, if not in morphology at least in behavior. Actually, I would think most large mammals are at least the former. Think of all the antlers and horns, and the size dimorphisms.

  11. I’m sure there’s a “study” out there that posits that “climate change” (I don’t think they even know what that means anymore) will make animals bigger too. Just like CC will cause more droughts yet more rain, more cold yet more heat, etc. In other words, if more or less of something can conceivably be bad, then they will find a way to show that CC will make the bad things happen.

  12. I’m going to wake during the night, with this in my head:
    I’m worried now but I won’t be worried long
    “Worried Man Blues”

  13. What continent has most of the large animals?
    Answer – Africa (elephants, rhinos, hippos, giraffes, etc).
    Is Africa hot or cold?
    Answer – hot.
    So why haven’t all of the large African animals shrunk? They have had millions of years to shrink, but they haven’t done so. Were the large African animals even bigger in the past (maybe they have already shrunk). Imagine elephants the size of dinosaurs.
    P.S I want a poodle sized elephant when they find one.

    • The other thing is that you have like pocket pooches and then you have dogs as big as miniture ponies and they disipitate heat via their tongues. So I see that as a crock of shit.
      The only way to prove that would be to clone an animal and put them in two different extremes under the same care.

    • Actually some african animals have “shrunk”. But the effect is weak in the Tropics where temperature changes relatively little between glacials and interglacials.

  14. And then they wonder why people don’t buy this crap. Yep, give up your car, your AC, your single family suburban home to protect against … mammalian shrinkage.

    • RE: “…to protect against … mammalian shrinkage.”
      That fad came and went in the ’60s. Remember Twiggy?

  15. BS and hogwash. Size is relative to genetics and calories, and visa versa. The more calories or less, the larger or smaller a species becomes and causes an effect on genetics. The environment therefore has an effect on the size and genetics of the species, as well as cross breeding of species that creates new species.
    Many species that were able to cross breed created what humans today look like. With many different genetic differences, broken into species we call races, to separate ourselves from common animals. As species of humans migrated globally they reduced their gene pool and “bottlenecked” to create subspecies. It is that mixture of genetics that create the differences in every human. The smaller the gene pool the more the population resembles each other. The environment in which they live, or inflict upon themselves, changes their mass by the calories, water and availability of sustenance from birth to death. A species that has a long history of food shortage will genetically become smaller. Where if they moved to an area that has more food, they begin to increase in size over generations. Or if their environment changes from poor to good, or good to poor over generations will cause mutations.
    I know this is not a detailed explanation and I’ll get criticism for it. If you open your perspectives you can read between the lines. The proof is all around you… if you look at people around the world. The stature difference between North and South Koreans is a great example, that has only taken several generations. The high mountain people of Peru and their lowlands relatives where the Carbon and Oxygen differences created genetic differences as much as the foods they consumed or the atmospheric pressure variations. Then you have to wonder about the tribes in the Amazon where food is lacking for them and their small stature, compared with the Pygmy people in the Central African Rainforest, and other areas of the earth. Some scientist attribute the lack of B3 from reduced ultraviolet light under the canopies contribute to reductions of calcium uptake in their bones, causing the evolution of a small skeletal size…as well as their diets calcium? Yet, nowhere is it mentioned; that in rainforests, there are high Carbon Dioxide and Oxygen percentages, as related to non-rainforests, effects on human stature. How do we compare hunter gatherers to the more sedate lives of civilization in stature, where calories are burned to what is not, plays a role in genetics?
    It is these types of issues that there is no real answer. You cannot compare what happened to a few species millions of years ago, in secluded areas, to make any theory of what may happen in the future. Which is why I said this is BS and hogwash.

  16. The irrational fear of AGW already shrinks the brains of alarmists like D’Ambrosia, Boringstein et al.

      • I wish their reproductive organs to shrivelshrink to a size that makes a natural reproduction of alarmists impossible and they’ll have to do it in vitro. I want these funny alarmists not to go extinct completely. Good for a laugh, occasionally.

  17. The most important thing that has most certainly shriveled over the decades of the human caused climate change debate is the credibility of the scientific community in general. The ever growing volume of this kind of excrement will continue that trend.

    • It’s not the credibility of the scientific community that has shriveled, it’s (half) the (American) public’s trust in it. For decades the scientific community has been defamed by propaganda aimed at the Right, and it sunk in but good. There are reams of original documents surfacing describing just how they wanted you to think, and they were very successful. Big Oil and Friends scheming about newspaper ads, radio interviews with scientists they pick and “train” as spokesmen, materials for the media… And even though the models got better and evidence accumulated, the messages they fed you stayed the same.
      Makes a surreal read. Makes so much sense, though.
      http://www.climatefiles.com

      • Kristi Silber, that rationale of why people mistrust science is truly precious. So various greens, who are leftist when being political, running anti-GMO campaigns, are not undermining science? What you seem to object to is anyone disagreeing with your policy preferences, and using science as a reason.

  18. There’s clear evidence this is already happening.
    As I get older, I’ve noticed I get shorter – what else could it be other than CAGW?

  19. An interesting study would be if Alarmism causes brains to shrink, or if small brains is an existing feature of Alarmists.

  20. Actually this is a well-known and well understood phenomenon. It shows up clearly in the Pleistocene as well. Animals during interglacials are significantly smaller than animals of the same species during glacials. It is so regular that it can sometimes even be used to determine if a particular deposit is glacial or interglacial. And it has been known for a looong time. Kurtén wrote about it in “Pleistocene mammals of Europe” fifty years ago.
    This is typical Climate Science™, take a long-known and well-understood phenomenon and write a climate scare story around it. Neither journalists or peer-reviewers are likely to notice. Also think how much safer research is from an appropriations point of view when you can be sure in advance of your results.
    It doesn’t work for poikilothermic (“cold blooded”) animals by the way.

    • There is an ecological principle rooted in metabolism about this with a name which I forget. Am on a week fast from reading papers but the abstract says “…ETM2 is observed in two of four taxonomic groups analyzed in this study.” I’m a fan on what it takes to do palaeontological studies. Not so much on prediction of the future of evolution.

  21. And here I was under the impression that a warmer climate promoted more plant growth, which provided more feed to grow bigger animals.
    When I want my beef cows to put on more protein, I always promote pasture growth so they’ll have more to eat (or give them more hay in the fall after cold weather stymies grass growth in my pasture).
    I suppose I’ll have to switch seasons and raise my beef cows in the winter when it’s colder!
    Or I could use logic and do what I’ve been successfully doing for years.
    Steak, anybody?

  22. It’s a natural reaction, and is happening today at least in the US deer herd. Northern deer are considerable larger than those in the south. Why? Because warmer clime deer do not need to extra weight/fat required for colder, longer Winters.

  23. “…when carbon dioxide levels soared and temperatures spiked”
    Typical of Alarmunists in their bizarro world, they get things completely backwards. No, numnutz; first, temperatures go up, then perhaps 800 years later on average, CO2 goes up.

    • Actually we don’t know that CO2 levels soared, only that d13C (the isotope ratio of coal) shifted which is interpreted as being due to an injection of isotopically depleted carbon into the system. However since it is unknown what the isotope ratio of this “new” coal was it is also unknown what the effect on CO2 levels might have been.

  24. “University of New Hampshire researcher Abigail D’Ambrosia warned that mammals — but not people — could shrivel in the future under even faster man-made warming.”
    Wow, Abigail! I mean just really, like WOW!!! You mean even faster than 0.8C in less than 170 years???

    • This effect works through ordinary evolution. Smaller animals have smaller offspring, if these survive better and have more offspring than larger animals, then the animals will tend to become smaller generation by generation.
      However it works rather slowly. Human hunters selectively killing the larger animals have much larger – and faster – effect.

  25. Hmmm. Didn’t the largest animals that ever existed, do so during a period of heightened C02?
    Is there literally NO collateral knowledge being taught anymore?

    • This effect works mainly on larger continental animals and it’s about relative size. Interglacial mammoths were smaller than glacial mammoths, but they were still pretty big.
      On islands things work out differently – large animals tend to shrink and small animals to grow. There have been pony-sized island elephants and badger-sized island hedgehogs.

      • With greater C02, foliage grows larger, providing more food for herbivores, which in turn grow larger, followed by the predators.
        It’s a simple matter of biomass… which, on islands, is naturally less.

  26. It’s already shrinking human brains….selectively that is and mostly in media occupations and advocacy orgs.

  27. Weren’t dinosaurs huge and wasn’t it really hot and moist then? So the dinosaurs were shrunken from even bigger animals? Wow, I am soooo confused.

  28. Just when you think the leftists
    could not possibly come up with a more
    bizarre “campfire tale” to scare people
    about the alleged
    coming global warming catastrophe
    … they invent shrinking animals.
    I do give some credit to the bizarre stories:
    I’ve been reading about climate change since 1997.
    I was inspired twice,
    to write an article
    on climate change,
    for my economics newsletter
    — one in 2007
    and the other in 2014.
    Something changed in late 2014.
    After many years of no global warming at all,
    I noticed the scary climate change
    stories were worse than ever,
    and that really annoyed me.
    I decided to start a climate change blog
    to keep my newsletter subscribers up to date
    on climate change issues.
    A year later I decided to
    include my climate blog URL
    at the bottom of some of my comments here
    as a public service for people who found
    the science too complicated i article here.
    My point, and I do have one,
    is the slower the rate of global warming was,
    the more bizarre were the scary stories
    of a coming climate doom,
    as if the general public are fools
    who will ‘buy’ anything
    that government bureaucrats
    with science degrees claim !
    I don’t understand why
    shrinking animals would even
    be bad — I wish my cat would shrink,
    and eat less, saving me money.
    I think leftists missed the mark
    with this bizarre shrinking animals claim.
    They should have claimed
    global warming would shrink
    something else — something
    that men would NEVER want to shrink.
    Now THAT would scare male non-believers !
    Modern climate change “science” is a joke —
    so why not tell a joke here ?
    My climate change blog for common sense people
    — so leftists must stay away:
    http://www.elOnionBloggle.Blogspot.com2

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