All the baby birds will starve unless we change our wicked ways.
Climate change leaves birds hungry as chicks hatch too late to eat caterpillars
Earlier springs in UK are throwing animals’ natural rhythms into disarray, resulting in population declines
Josh Gabbatiss Science Correspondent
Monday 23 April 2018 16:15 BST
Warmer springs due to climate change are leaving chicks in UK woodlands hungry, according to new research.
…
“Previous work has shown a mismatch does lead to population declines,” Dr Karl Evans, one of the study’s authors at the University of Sheffield, told The Independent.
Dr Malcolm Burgess, a bird researcher at the University of Exeter and the RSPB who led the research, added: “Forests have a short peak in caterpillar abundance, and some forest birds time their breeding so this coincides with the time when their chicks are hungry.
“With spring coming earlier due to climate change, leaves and caterpillars emerge earlier and birds need to breed earlier to avoid being mismatched. We found that the earlier the spring, the less able birds are to do this.”
…
“Birds shift the timing of breeding, and they tend to breed earlier in springs that are warmer – but the manner in which they are shifting isn’t sufficiently rapid, that’s the theory,” said Dr Evans.
“People are starting to look at whether there’s capacity for evolutionary change to improve their ability to match, but the evidence is very mixed at the moment.”
…
The abstract of the study;
Tritrophic phenological match–mismatch in space and time
Malcolm D. Burgess, Ken W. Smith, Karl L. Evans, Dave Leech, James W. Pearce-Higgins, Claire J. Branston, Kevin Briggs, John R. Clark, Chris R. du Feu, Kate Lewthwaite, Ruedi G. Nager, Ben C. Sheldon, Jeremy A. Smith, Robin C. Whytock, Stephen G. Willis & Albert B. Phillimore
Increasing temperatures associated with climate change may generate phenological mismatches that disrupt previously synchronous trophic interactions. Most work on mismatch has focused on temporal trends, whereas spatial variation in the degree of trophic synchrony has largely been neglected, even though the degree to which mismatch varies in space has implications for meso-scale population dynamics and evolution. Here we quantify latitudinal trends in phenological mismatch, using phenological data on an oak–caterpillar–bird system from across the UK. Increasing latitude delays phenology of all species, but more so for oak, resulting in a shorter interval between leaf emergence and peak caterpillar biomass at northern locations. Asynchrony found between peak caterpillar biomass and peak nestling demand of blue tits, great tits and pied flycatchers increases in earlier (warm) springs. There is no evidence of spatial variation in the timing of peak nestling demand relative to peak caterpillar biomass for any species. Phenological mismatch alone is thus unlikely to explain spatial variation in population trends. Given projections of continued spring warming, we predict that temperate forest birds will become increasingly mismatched with peak caterpillar timing. Latitudinal invariance in the direction of mismatch may act as a double-edged sword that presents no opportunities for spatial buffering from the effects of mismatch on population size, but generates spatially consistent directional selection on timing, which could facilitate rapid evolutionary change.
Read more (paywalled): https://www.nature.com/articles/s41559-018-0543-1
Sadly the full study is paywalled, but in my opinion this study doesn’t pass the smell test.
Suggesting that birds might not have the capacity to adapt, when they clearly managed to adapt to far worse in the comparatively recent past, in my opinion is ridiculous.
Just under 13,000 years ago the world experienced the Younger Dryas. The Younger Dryas was a 1200 year catastrophic plunge in global temperature which struck with full force in as little as a few months. In the words of one researcher, “It would be like taking Ireland today and moving it up to Svalbard“.
Unusual spring weather likely does put pressure on baby birds. Britain frequently has late Spring cold snaps which probably causes harm to vulnerable fledglings. But the mild warming we have experienced over the last few centuries does not come anywhere close to the disruption radical climate shifts of the past like the Younger Dryas must have caused – climate shifts which most bird species obviously survived.
I printed the paper out and showed it to my pet parakeet.
Parakeet’s response:
It pooped on the paper.
I couldn’t have said that better myself.
/grin
At least you put the study to good use.,, 🙂
Are you sure it pooped? Must have been well camouflaged.
lol
That is a classic case of “Even an idiot can see there are obvious reasons why our arguments are probably complete BS. But if we don’t look too hard for contradictory evidence, then we conveniently won’t find any, and we will continue to get away with this tripe.”
Earlier Spring? This article has been published just as Spring has finally started here in England. This has been one of the worst starts to a year that I can remember (I am 68). Snow, ice and bitter cold in London in March is not usual, but perhaps it is down to Climate Change after all and we are entering a new ice age.
Two summers ago the baby Robins were eaten by Ravens, last summer they were eaten by a cat, we took the nest down. In other news, there were a lot of birds at the feeder this spring, they do seem to be surviving.
I’ve seen squirrels try to go after robin nestlings in the tree outside my west window. I keep an eye open for that.
The cruelest bird behavior I see is English Sparrows raiding bluebird houses and ejecting the hatchlings. They are invasive disease carriers which like to commandeer other species’ nests.
The stupidest birds I see are Robins who see themselves in windows and try to mate with their reflections.
Every time I read something like this, I imagine a climate scientist with a manikin that looks like Darwin, stabbing it over and over in the back with a knife.
Just saw this on MSN: https://www.msn.com/en-us/weather/topstories/why-has-this-severe-season-been-so-slow/vi-AAwbNMP
Maybe the birds are safe. LESS extreme weather so far. Imagine that!
Clearly the problem here is that nature has 2 competing teams. Team A (Birds) is using the weather to dictate behaviour but Team B (insects) is using Gregorian calendars to do so.
I think it might be a good idea for the WWF to create new calendars to reflect the new weather, that way they will save the world and correct for what is clearly a flaw in nature.
Maybe they got confused by the whole “BCE/CE” thing…
Reasonable Skeptic April 24, 2018 at 9:33 am
Clearly the problem here is that nature has 2 competing teams. Team A (Birds) is using the weather to dictate behaviour but Team B (insects) is using Gregorian calendars to do so.
They do have ‘competing teams’ as reported in the paper:
“Among years, the timing of oaks and caterpillars is strongly positively correlated (Table 1a) and the major axis slope does not depart significantly from 1 (Fig. 2b and Table 1b). This result is consistent with the caterpillar consumer perfectly tracking the timing of the resource over time.”
“In late springs (that is, under colder conditions) peak demand from blue tit and great tit nestlings is expected to coincide with the peak resource availability, whereas pied flycatcher peak demand occurs soon after the resource peak (Fig. 3d–f). When caterpillar phenology is earlier (that is, warmer springs), the peak demand of nestlings is predicted to be substantially later than peak resource availability, rendering the nestlings of all three species mismatched, and pied flycatchers most mismatched.”
Egg laying takes place about a month before the peak caterpillar availability.
Occurred to me a few weeks ago that there are a lot of people with science degreese needing jobs (according to this nice little article, many millions: https://www.richardprice.io/post/12855561694/the-number-of-academics-and-graduate-students-in/amp ). To all true believers, alarmists, and other forms of pond life, for the sake of keeping it simple just remember this one thing: this isn’t a conspiracy theory or some other moronic pejorative of the kind you’re used to applying to skepticism. For the scientists involved it’s just plain simple human dishonesty inspired by the need to be employed combined with a weak or nonexistent ethical system of the sort that is so common place at this point in history
As for the politicians and media, if you don’t already know what to think of them, you should probably just go live in a cave. You’re already living in an intellectual one, might as well take the next logical step.
[? .mod]
I’ve never seen [?.mod] before but am assuming it means something like, “wtf? explain your premise please.”
I’m saying that every single scientist publicly onboard with AGW, and who publishes AGW-hysteric papers is being knowingly dishonest for the sake of employment – period. With what amounts to an annual glut of new science grads added to an existing population of millions, this should come as no surprise. Obviously I do not include scientists doing REAL science with the aim of benefiting humanity, e.g. the good angels at the National Ignition Facility.
My accusation extends all the way back to Jones, Briffa, Mann et all, with the single exception of Hansen, who is simply a nutjob who was in the right place at the right time – a blunt tool molded by Gore and the IPCC for their clearly nefarious ends. Government and media run on a steady diet of your money, so no surprise there either. Hope this is all clear, it’s hard to organize my thoughts into a post when dictating voice to text into my phone. 😛
Butterfly fossils date to the Paleocene, which was about 56 million years ago.
Some butterflies, especially in the tropics, have several generations in a year, while others have a single generation, and a few in cold locations may take several years to pass through their entire life cycle.
https://en.wikipedia.org/wiki/Butterfly
Firstly, spring coming earlier and later occurs in cycles and is called weather. It takes about 60/70 years to cover the smallest cycle in climate.
It seems the warmer the climate, the more breeding opportunities for butterflies. Therefore more life cycles, more caterpillars available throughout the year for birds to feed. It is amazing when so called scientist use political like spin and avoid the facts for climate change, but nothing new there. The less able birds will have likely have more difficulties whenever spring starts.
When spring starts earlier it means snow melts so birds can feed from different insects and worms not reachable with snow cover. I can only see a potential minor problem if the bird species only feeds from caterpillars.
Would they rather winter stay until summer? Something good happens for wildlife and they try and spin some nonsense so they get some funding for climate change.
Already mentioned butterflies and moths shift the timing of breeding too and they also breed earlier in springs that are warmer. Very hard to believe that such a small timescale will make any difference when there are other food sources around even if this were true.
Springs vary every year and they have have been getting later over recent years in the UK with especially 2013 and 2018 been particular late. Warm weather causes all natural life cycles to breed earlier and some times cold weather catches them out, but seen little evidence how such a short time would make any difference? I’m sure long cold winters and much later springs are much more difficult for all wildlife.
Is there any evidence to any deaths of birds from this such short window?
The real truth being wind turbines kill birds including young, up to hundreds per year per turbine for the religion of climate change.
I see. The brainless dimwitted caterpillars have got it right but the more intelligent and brainier birds haven’t.
What a … um … far-fetched and imaginative if not quaint notion. Considering the avia are the last surviving remnants of the dinosaur age, they’ve done pretty well to survive an extra 66 million years ….
Shame about the stoopid sky-entists.
The weak birds will be Planned through Nature or Selection.
The Earth’s climate is continually changing and changing has been going on for eons. Birds and their ancestors have been around for more than 100 million years with periods of climate change that were far more severe than today yet birds and their babies survived.
Risselty, rosselty, now, now, now
These were birds in the UK? Fine – feed them bangers and mash then.
Climate change causes Spring (ie, warmer weather) to come early. That’s trot out when we have an early Spring.
Melting ice in the Arctic caused by global warming (ie, climate change) causes temperatures in Europe to be colder. That’s trot out when we have exceptionally cold weather and lots of snow.
Heads I win, tails you lose.