Veteran Yale University research ecologist Dan Botkin has a new book coming out tomorrow (Saturday 15 October) that you might want to look at:
A number of chapters are relevant to polar bears, including these three:
“Myth 11: Without Human Interference, Earth’s Climate is Stable”
“Myth 13: Climate Change Will Lead to Huge Numbers of Extinctions”
“Myth 25: Compared to Climate Change, All Other Environmental Issues Are Minor”
I found the book clearly written in a readable style (Table of Contents here). It provides timely insight into critical issues related to conservation and species extinction, with many real-world examples that counter theoretical assumptions (polar bears are discussed in the Overview). I found the energy issues (Myths 23 and 24) an awkward distraction but others might find them of interest. It’s a good companion to Bjorn Lomborg’s The Skeptical Environmentalist (an excellent reference from 2001 but much more detailed).
Pre-0rders now being taken:
Twenty-five Myths That Are Destroying the Environment: What Many Environmentalists Believe and Why They Are Wrong. Daniel B. Botkin 2017. Rowman & Littlefield Publishers, Inc., Lanham, MD 20706. $12.71 PAPERBACK; $7.51 KINDLE
Peak inside via Amazon, more about Dan Botkin and his publication record, and the book below.
Posted in Book review, Conservation Status, Population
Tagged conservation, Daniel Botkin, ecology, extinction, marine mammals, myths, new book, polar bear, review, sea ice, walrus
From Saturday 8 October, English journalist, author and broadcaster James Delingpole (via his Breitbart column) writes about polar bears:
The Truth About Polar Bears: They’re a Dangerous, Out of Control Pest…
“Crockford is the author of a Jaws-style thriller on ravenous polar bears killing humans called Eaten. At least one polar scientist who has read it considers its “science-based scenario” to be frighteningly plausible.
In field-level polar bear management circles, people don’t talk about the kind of scenario that forms the premise of this novel as an “if”. Instead, they describe it as a “when” and they are not looking forward to it.
Eek is right! The book has been nightmare-inducing for many readers. Put EATEN on your Christmas shopping list (all purchase options here). It makes a great gift and supports the work I do here. Colleagues have said their young adult children really enjoyed it.
[I’m reminded of Christmas since we had turkey for Canadian Thanksgiving this weekend – a fabulous gathering of all the local family at my place, including the two (!!) grandbabies, both of whom are now walking. I’ll be sending Nico to Churchill before you know it]
[And FYI, I’ve updated the Svalbard “problem no one is talking about” post with statistics by year (1974-2015) for polar bears killed to protect life and property]
Posted in Book review, Polar bear attacks, Population
Tagged attacks, christmas, conflicts, Eaten, facts, polar bear, predators, readers, review, young adults
The annual Arctic sea ice minimum for 2016 is imminent and the hand-wringing about polar bear survival has already begun. While this year is shaping up to be another very low sea ice minimum in the Arctic – not as low as 2012 but
lower than as low as 2007 (previously the 2nd lowest since 1979) – contrary to predictions, several recent studies show that such low sea ice coverage in summer has had no (or very limited) negative effects on polar bear health and survival. In fact, for polar bears in some areas low summer sea ice has been quite beneficial (although these are not the populations that polar bear specialists predicted would do better).
Since low summer extents of recent magnitude (3.0 – 5.0 mkm2) are clearly not any sort of threat to polar bears, it seems improbable that even an ice-free (≤ 1.0 mkm2) summer (e.g. Wang and Overland 2015) would be devastating to the species [don’t forget Cronin and Cronin 2016: they’ve survived such conditions before] – as long as conditions in spring allow for the necessary concentrated feeding on young seals.
Above: Top, minimum at 2012 (16 Sept, 3.41 mkm2, lowest since 1979); Center, 2007 (18 Sept, 4.17 mkm2); Bottom, 2015 (9 Sept, 4.50 mkm2), from NSIDC. Below: sea ice at 10 Sept 2016, 4.137 mkm2 – minimum not yet called).
Recall that in 2006, the IUCN Polar Bear Specialist Group based their conservation status of ‘vulnerable’ (likely to become threatened within the next 45 years due to reduced habitat) on the predictions of sea ice specialists (see 2008 update here).
Sea ice experts in 2005 predicted such low summer sea ice extents as polar bears have endured since 2007 (3.0 – 5.0 mkm2) would not happen until 2040-2070, at which time PBSG biologists said that >30% of the world’s bears would be gone.
Evidence to the contrary comes from polar bear specialists working in the Chukchi, Beaufort, and Barents Seas – and in Southern Hudson Bay – since 2007. Overall, the latest IUCN Red Book assessment (2015) put the global population size at 22,000-31,000 (or about 26,500).
All of this means that those polar bear experts were wrong: polar bears are more resilient to low summer sea ice conditions than they assumed.
Posted in Conservation Status, Population, Sea ice habitat
Tagged ACIA, arctic sea ice, Barents Sea, bearded seals, Beaufort Sea, body condition, Chukchi Sea, endangered, extinction, extirpation, facts, IUCN Polar Bear Specialist Group, NSIDC, polar bear, population size, predictions, productivity, ringed seals, sea ice, Southern Hudson Bay, summer ice minimum, survival, threatened
Since mid-August, Vancouver Sun columnist Daphne Bramham has been filing a series of articles from an expedition cruise through the Northwest Passage for a feature called “Above the Arctic Circle”. One of these appeared on August 18, along with a video called “What to know about polar bears and global warming” and it contained an egregious error that should have stood out to any educated person as being wrong by several orders of magnitude:
We are not talking about a difference of opinion or interpretation but a simple fact that was outrageously wrong by a wide margin. You see it, don’t you? Continue reading
Posted in Advocacy, Conservation Status, Population
Tagged advocacy, Canada, climate change, error, extinction, facts, false, global warming, misinformation, polar bear, population decline, population size, Postmedia, Vancouvern Sun, video
A polar bear female accompanied by a cub recently attempted to board a small sailboat anchored in a remote harbour off central Labrador – giving the two American boaters below deck a mighty big surprise.
‘He said ‘it’s a bear, it’s right on the boat, make some noise.'” – Nancy Zydler
The encounter occurred south of the same national park where a much-publicized attack occurred in July 2013 (see previous posts here and here) but had a happier ending. See more below from a CBC report released this morning (based on a radio interview) and some ecological context for the sighting not mentioned by the reporter.
Posted in Polar bear attacks, Population, Sea ice habitat
Tagged attacks, Davis Strait, encounters, harp seals, Labrador, Meltdown, polar bear, prey, problem bears, sailboat, sightings, summer, summer fast, swimming, Torngat Mountains National Park