– Fred Pearce The Climate Files: The polar bear (Ursus maritimus) is a hypercarnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses.It is the largest extant bear species, as well as the largest extant predatory carnivore. © 2020 Forbes Media LLC.
pdf here. Required fields are marked *. Interesting comment by Joel. The blue mussel, Mytilus edulis, returned to Svalbard in 2004 following recent warming, and after almost 4000 years of absence, excluding a short re-appearance during the Medieval Warm Period 900 years ago.
Similarly, nothing is said about the surprising fact that the population estimate for that year was the highest over the ten year period of 2006-2015 (see section above).
Accordingly, the Washington Post (picked up by other outlets) focused a statement in the paper that “long-term persistence of polar bears (Ursus maritimus) is threatened by sea-ice loss due to climate change” and on the denning issue rather than the new population count.
I’m sorry, really this sort of propaganda just won’t do.”.
Her nutrition is dependent on the fish she can eat under the ice in the winter.
167-181. pdf here. In 1973 commercial hunting was strictly regulated following the signing of an international agreement on polar bear conservation.
With less sea ice every year, polar bears and many other ice-dependent creatures are at risk.
For permission, contact us. Recent claim of a polar bear expert [my bold]: In 2015…the polar bear population in the Beaufort Sea had declined by 40% over the previous decade. However, not mentioned in the paper but obvious in the graph below is that the population count in 2012 was the highest over the 2006-2015 period – an average of about 750 bears. Gland, Switzerland and Cambridge UK, IUCN., pg. This Day In Meme History: It's Over 9000! Sea ice was heavier than usual and heavy ice extended further south than usual in 1975 and 1976. Even if greenhouse gas emissions are kept to a more moderate increase, the study’s authors said that some polar bear populations are likely to be lost in the southernmost parts of the globe.
Fish and Wildlife Service to determine whether industrial activities will have a negligible impact on the SBS subpopulation.
State of the Polar Bear Report 2019. This is because male polar bears won’t kill the cubs of females that they have mated with. They believe there is another possible reason for the collapse of the whale population.
She previously worked on the Forbes breaking news desk. However, rather than do the work necessary to resolve this potentially critical problem, USGS authors went ahead and generated another population estimate and more survival estimates using a model with a known flaw.
The amount of fish under the ice in the winter is dependent on the previous summer fall krill. Polar bear population status in the Southern Beaufort Sea. Jul 10, 2020 at 03:58PM EDT 2018.
As far as I am aware, no other population estimate report has included such distracting information.
https://partner.sciencenorway.no/arctic-ocean-forskningno-fram-centre/the-ice-retreats–whale-food-returns/1401824. [We’re not doing the whole “insults through name-change” thing here. The fact is that in the 1960s we had no idea how many polar bears there were.
…In my opinion, the overriding factor affecting ringed seal distribution is the distribution of favorable sea ice conditions.
We estimated that the entire SBS subpopulation produced 123 dens per year (median; 95-percent credible interval = 69, 198 dens), 66 (median; 95-percent credible interval = 35, 110 dens) of which were land-based. Not only is the land surface GREENING, but the seas are also springing BACK to life after being TOO COLD and frozen over for much of the last 500 or so years (coldest period of the Holocene).
Seal biologists John Burns and colleagues described the unusual nature of the movements of seals and bears in their quarterly report on research they were doing on the distribution and abundance of seals in 1974 and 1975 (Burns et al.
Below is an excerpt from a previous post on an incident of cannibalism that occurred in 1976 that’s pertinent because of the descriptions of the spring ice conditions for 1975 and 1976, and the effects these had on both ringed seals and polar bears.
Perhaps critically, this study model was not able to adequately account for the fact that Alaskan polar bears move around: ….
Griff enjoys being a human piñata. Climate change has already led some parts of the Arctic to be completely ice-free during the summer months.
Perhaps critically, this study model was not able to adequately account for the fact that Alaskan polar bears move around: they are known to move to and from nearshore and offshore locations (see map of study area above), as well as to and from neighbouring subpopulations (see also next section), which may have affected the accuracy of the population and survival estimates. Yep , your manic dis-information propaganda should be ignored.
but don’t tell Paul Ehrlich. Variation in the response of an Arctic top predator experiencing habitat loss: feeding and reproductive ecology of two polar bear populations. Pilfold, A.E. Ice has been present along the coast for the last 5 years at least up until the 1st week of May and often beyond.
2015; Stirling et al. Polar bear populations are expected to come under increased pressure if oil developments in the Arctic go ahead according to industry plans. In both years significantly fewer seals were killed by bears in the Barrow, Alaska area than in years when ice had not been so heavy. Press Even now, about half of our population estimates are only educated guesses.
Really, why is this low summer ice claimed to be such a problem because when it happens, the next Spring is Arctic feeding bonanza for all the mammals?
Was the apparent low survival in 2012 a result of the failure to account for movement of bears?
The relationships of marine mammal distributions, densities, and activities to sea ice conditions (Quarterly report for quarter ending September 30, 1975, projects #248 and 249), pp. Ecological Applications 21:859-876. http://www.esajournals.org/doi/abs/10.1890/10-0849.1, Stirling, I., Richardson, E., Thiemann, G.W.
Arctic 61:14-22. http://arctic.synergiesprairies.ca/arctic/index.php/arctic/article/view/3/3.
Also, perhaps related to reduced availability of seals, the first instance of predation by an adult bear, a male, on cubs was noted.
You got that right, Patrick MJD.
Rode, K.D., Douglas, D., Durner, G., Derocher, A.E., Thiemann, G.W., and Budge, S. 2013.
A just-released report on the latest count for the Alaska portion of the Southern Beaufort subpopulation reveals that numbers have been stable since 2010 despite claims the population has continued to decline. The study’s scientists told the Times that back then, the polar bears had other food sources, like whales, that are not present today. Arctic is so much COOLER than it was for most of the Holocene, which explains why there is still so much sea ice up there. Very cool meme, definitely necessary.
However, from 1800 and onwards, the north and west coast of Spitsbergen – the largest island in the Svalbard archipelago – gradually became covered in ice, destroying the food source which sustained the stocks of bowhead whales. This seems to cover up to 2015… but the ice has changed dramatically in the Beaufort in the last 5 years, retreating far offshore at an early date…, This year is the ‘best’ Beaufort ice in years…. Jul 28, 2020 at 09:06AM EDT
1975.
According to the World Wildlife Fund (2009): Several polar bear populations were decimated by unsustainable hunting by European, Russian and American hunters and trappers from the 1600s right through to the mid-1970's. 1975).
A report of an incident of cannibalism in 1976 was made by biologist Jack Lentfer in his summary of polar bear research in Alaska for the IUCN Polar Bear Specialist Group’s 6th meeting (1976, pg. Eh, at least it's not another shit version of wojak that exists to be shitty to people. PROTIP:
This suggests that conditions in the eastern Beaufort were worse in the spring of 1974 (with almost as bad conditions the following two years, see previous post here), but that in the Chukchi Sea and western Beaufort, the worst effects were evident in 1975 and 1976.
Atwood, T.C., Bromaghin, J.F., Patil, V.P., Durner, G.M., Douglas, D.C., and Simac, K.S., 2020. Why do you HATE Arctic wildlife SO MUCH griff[snip] ? Stirling, I., McDonald, T.L., Richardson, E.S., Regehr, E.V., and Amstrup, S.C. 2011. Fasting season length sets temporal limits for global polar bear persistence (Nature Climate Change), Global Warming Is Driving Polar Bears Toward Extinction, Researchers Say (New York Times), Climate change: Polar bears could be lost by 2100 (BBC News), Your Questions About Our Starving Polar Bear Video Answered (National Geographic), Lisette Voytko is a wealth reporter at Forbes Magazine, focusing on billionaires, money and the world's richest people. © 2007-2020 Literally Media Ltd. No thanks, take me back to the meme zone!
Sea ice loss forces polar bears to endure longer periods of fasting, because they rely on the frozen surfaces to hunt seal, their main food source. Available in paperback and ebook formats. Digital Archaeologist & Treasurer & Media Bus Boy, Digital Archaeologist & Archivist & Media Bus Boy, Digital Archaeologist & Cataloger & Media Bus Boy, Digital Archaeologist & Curator & Collection Butler. Global Change Biology 20(1):76-88. http://onlinelibrary.wiley.com/doi/10.1111/gcb.12339/abstract, Rode, K. D., R. R. Wilson, D. C. Douglas, V. Muhlenbruch, T.C. – Jonathon Moseley, American Thinker, “…flashy (apparently widely distributed)”– Michael E. Mann, Material on this website is copyright © 2006-2019, by Anthony Watts, and may not be stored or archived separately, rebroadcast, or republished without written permission.
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