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sidd

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Re: Wildlife
« Reply #200 on: September 25, 2018, 10:32:09 PM »
N. American amphibian decline not primarily driven by climate change, but more directly by land use changes going back a century or more.

" these declines are a continuation of losses of amphibian populations that have been occurring since the 19th century when human land-use began destroying their habitats."

"The researchers determined that, while climate change likely has been and will be a factor in the decline of some local populations such as in the Rocky Mountain West—where the effect of a warming climate seems to be more severe for amphibians—it is not responsible for the current declines that are occurring."

https://phys.org/news/2018-09-climate-main-driver-amphibian-decline.html

The paper is open access. The patterns it describes are quite complex:

"While we demonstrate that amphibian communities are sensitive to changes in climate, our results suggest that changing climate is not the proximate cause for ongoing assemblage-wide declines that have been observed in North American amphibians. Instead, we find that recent change in climate is a strong predictor of why local species richness is declining more quickly in some regions and that positive effects of climate may be buffering declines in other regions. For 37% of studied locations, we predicted that local species richness would have increased if climate was the primary factor determining changes in amphibian communities. We cannot eliminate factors we have not tested here. However, it would be surprising to find so many climate “winners” in our analysis if climate was a primary driver of the severe declines  being  observed  in  North  American  amphibian populations."

Read all about it:

doi: 10.1038/s41467-018-06157-6

sidd

sidd

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Re: Wildlife
« Reply #201 on: September 25, 2018, 10:37:55 PM »
Glyphosphate hurts bees: Stop using roundup so indiscriminately:

"As in many animals, honey bees rely on their gut microbial community for a variety of functions, including food processing (25, 26), regulation of immune system (33, 34), and defense against pathogens (17, 27). Perturbations of this system have the potential to lead to negative consequences for host fitness. We found that glyphosate affects the bee gut microbiota composition and that bacterial species and strains within this community vary in susceptibility to glyphosate. Recent experimental and observational studies have provided evidence that dysbiosis affecting the bee gut can increase susceptibility to pathogen invasion (23, 41, 42). Our results also suggest that establishment of a normal microbial community is crucial for protection against opportunistic pathogens of honey bees."

The numbers in parentheses are reference numbers. The article is

doi: 10.1073/pnas.1803880115

coverage at

https://phys.org/news/2018-09-common-weed-killer-linked-bee.html

sidd

gerontocrat

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Re: Wildlife
« Reply #202 on: September 28, 2018, 12:13:39 PM »
Who needs climate change to kill wildlife when we have all these other means? For the Orca, something that just can't be fixed.

Orca 'apocalypse': half of killer whales doomed to die from pollution
Quote
Banned PCB chemicals are still severely harming the animals – but Arctic could be a refuge

At least half of the world’s killer whale populations are doomed to extinction due to toxic and persistent pollution of the oceans, according to a major new study.

Although the poisonous chemicals, PCBs, have been banned for decades, they are still leaking into the seas. They become concentrated up the food chain; as a result, killer whales, the top predators, are the most contaminated animals on the planet. Worse, their fat-rich milk passes on very high doses to their newborn calves.

PCB concentrations found in killer whales can be 100 times safe levels and severely damage reproductive organs, cause cancer and damage the immune system. The new research analysed the prospects for killer whale populations over the next century and found those offshore from industrialised nations could vanish as soon as 30-50 years.

Among those most at risk are the UK’s last pod, where a recent death revealed one of the highest PCB levels ever recorded. Others off Gibraltar, Japan and Brazil and in the north-east Pacific are also in great danger. Killer whales are one of the most widespread mammals on earth but have already been lost in the North Sea, around Spain and many other places.

The new research, published in the journal Science, examined PCB contamination in 351 killer whales, the largest analysis yet. The scientists then took existing data on how PCBs affect calf survival and immune systems in whales and used this to model how populations will fare in the future. “Populations of Japan, Brazil, Northeast Pacific, Strait of Gibraltar, and the United Kingdom are all tending toward complete collapse,” they concluded.

http://science.sciencemag.org/content/361/6409/1373
Quote
PCB—still a problem
Until they were recognized as highly toxic and carcinogenic, polychlorinated biphenyls (PCBs) were once used widely. Their production was banned in the United States in 1978, though they are still produced globally and persist in the environment. Persistent organic compounds, like PCBs, magnify across trophic levels, and thus apex predators are particularly susceptible to their ill effects. Desforges et al. looked at the continuing impact of PCBs on one of the largest marine predators, the killer whale. Using globally available data, the authors found high concentrations of PCBs within killer whale tissues. These are likely to precipitate declines across killer whale populations, particularly those that feed at high trophic levels and are the closest to industrialized areas.

Science, this issue p. 1373
« Last Edit: September 28, 2018, 12:47:34 PM by gerontocrat »
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

ivica

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Re: Wildlife
« Reply #203 on: October 22, 2018, 08:41:17 AM »
"Natural History Museum unveils the top Wildlife Photographer of the Year images."
https://www.mnn.com/earth-matters/wilderness-resources/blogs/natural-history-museum-wildlife-photographer-year-capture-diversity-beauty-nature

"Taken by 16-year-old Skye Meaker of South Africa, the photograph is of Mathoja, a calm 8-year-old leopard."


[ I exist. Do i think? ]

< Raising Human Consciousness > :)



sidd

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Re: Wildlife
« Reply #204 on: October 22, 2018, 09:02:27 AM »
Nice picture.

"  I exist. Do i think?  "

Very apposite.

Thanx.

I cannot resist straying from the thread topic to contrast an inset from another image, a famous one. This is the one from Cleveland.

sidd
« Last Edit: October 22, 2018, 09:17:28 AM by sidd »

ivica

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Re: Wildlife
« Reply #205 on: October 23, 2018, 01:12:58 AM »
sidd wrote: "I cannot resist straying from the thread topic to contrast an inset from another image, a famous one. This is the one from Cleveland."

Thank you, it links us & them :)

Sigmetnow

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Re: Wildlife
« Reply #206 on: October 30, 2018, 03:05:54 PM »
Wildlife populations fell by 60% from 1970, WWF says
- Population of more than 4,000 species found to have fallen since 1970
- 90% of seabirds now have plastics in their stomachs
- "Global deal" similar to Paris climate agreement is needed, WWF says
Quote
Global wildlife populations have fallen by 60% in just over four decades, as accelerating pollution, deforestation, climate change and other manmade factors have created a "mindblowing" crisis, the World Wildlife Fund has warned in a damning new report.

The total numbers of more than 4,000 mammal, bird, fish, reptile and amphibian species declined rapidly between 1970 and 2014, the Living Planet Report 2018 says.

Current rates of species extinction are now up to 1,000 times higher than before human involvement in animal ecosystems became a factor.

The proportion of the planet's land that is free from human impact is projected to drop from a quarter to a tenth by 2050, as habitat removal, hunting, pollution, disease and climate change continue to spread, the organization added.

The group has called for an international treaty, modeled on the Paris climate agreement, to be drafted to protect wildlife and reverse human impacts on nature.

It warned that current efforts to protect the natural world are not keeping up with the speed of manmade destruction. ...
https://www.cnn.com/2018/10/29/health/wwf-wildlife-population-report-intl/index.html
People who say it cannot be done should not interrupt those who are doing it.

solartim27

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Re: Wildlife
« Reply #207 on: November 07, 2018, 05:10:39 PM »
Article has a short video clip of Sperm Whales off of Nunavut, apparently only the second sighting so far north.
https://www.ecowatch.com/sperm-whales-sighting-arctic-2618298807.amp.html
FNORD

gerontocrat

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Re: Wildlife
« Reply #208 on: November 13, 2018, 06:45:26 PM »
A UK supermarket made an advert saying they were no longer using palm oil in their own label products because of the effect on orangutan habitat.
The advert is a cartoon made by Greenpeace



It was banned from TV for being political. So far around 35 million views on social media. Banning it made the difference.

https://www.bbc.co.uk/news/newsbeat-46187070
Iceland Christmas ad: Petition to show it on TV hits 670k
Quote
9 hours ago
A petition to get Iceland's Christmas advert shown on TV has reached more than 670,000 signatures. The advert, which highlights the impact of palm oil on rainforests and orangutan, has gone viral.

TV presenter James Corden shared the ad on Twitter where it's had 15 million views.

Clearcast, the body which approves ads for TV, said it wasn't approved because it breached political advertising rules.

It comes down to the law - political advertising isn't allowed on TV.
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

sidd

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Re: Wildlife
« Reply #209 on: November 17, 2018, 06:13:00 AM »
Industry funded study exonerates industry: 

"The company-funded animal test was performed to ascertain how neural development is affected by the pesticide chlorpyrifos ..."

" ...  concluded that there was no such effect, even at high doses."

" ... we observed a clear effect on the height of the cerebellum ... was reported neither in the study's summary nor in its conclusion."

" ... independent research has also previously indicated that chlorpyrifos adversely affects brain development, including childhood IQ ..."

https://medicalxpress.com/news/2018-11-flaws-industry-funded-pesticide.html

The reason i post this is "Wildlife" thread is because we are not just poisoning ourselves. We are killing myriads of creatures great and small, and we are too lazy to look and see the blights that follow our footsteps. Perhaps, as a species, we deserve to poison our own young. We do it to every other lifeform, don't we ?

sidd

sidd

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Re: Wildlife
« Reply #210 on: November 18, 2018, 11:27:44 PM »
As Yeats may have said, "The world is full of magic things, patiently waiting for our senses to grow sharper."

https://www.cbc.ca/news/technology/hemimastigotes-supra-kingdom-1.4715823

paper at doi: 10.1038/s41586-018-0708-8

sidd


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Re: Wildlife
« Reply #211 on: November 19, 2018, 08:21:05 AM »
Curiosity and Control, a nice Swedish documentary about our dented relation to nature.
https://www.svtplay.se/video/19863562/curiosity-and-control

Hardcoded Swedish subtitles but mostly in English with some French commentary. Hopefully viewable elsewhere. Adding a small snippet below.
Omnia mirari, etiam tritissima.
-
Science is a jealous mistress and takes little account of a man's feelings.

Sebastian Jones

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Re: Wildlife
« Reply #212 on: November 22, 2018, 06:55:19 AM »
Climate change makes strange bedfellows, grizzlies show up in Wapusk National park, joining black bears and polar bears for a world first.
https://news.usask.ca/articles/research/2018/usask-researchers-find-changing-environment-bringing-bear-species-together----.php

longwalks1

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Re: Wildlife
« Reply #213 on: November 22, 2018, 06:09:27 PM »

The above post looked interesting so I sleuthed.

Here is the site for preview article the 3 bear species co-habiting in space (land), but not so much in time (seasons).
The doi is part of the url  10.1139/AS-2018-0013

http://www.nrcresearchpress.com/doi/pdf/10.1139/AS-2018-0013

Quote
Range  overlap  of  these  three  species  in  this  dynamic  ecotonal  region  should  not  be
viewed as a threat to any of them but as an ecological response to environmental change that needs
to be better understood.
Keywords:
Ursus americanus  ,  Ursus arctos,  Ursus maritimus, Wapusk National Park

Quote
1Novel range overlap of three ursids in the Canadian subarctic  Douglas Andrew Clark 11*
, Ryan Brook
2 , Chelsea Oliphant-Reskanski
3 , Michel P. Laforge
4 , Kiva Olson
5 , Danielle Rivet
6 * Corresponding Author: Douglas Clark, email: d.clark@usask.c

gerontocrat

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Re: Wildlife
« Reply #214 on: November 24, 2018, 08:25:33 PM »
It seems the slow late freeze in the vicinity of Svalbard is a real threat to the population of bears that are based there. So, once gain, it is not the sea ice maximum and minimum that is the problem it is the length of time without ice that may be the killer. And one thing is sure, that 2018 extent now may be only the 13th lowest, but in many seas the ice-free or low-ice season was longer than usual.

https://www.theguardian.com/environment/2018/nov/23/slow-arctic-freeze-raises-risk-of-polar-bear-extinction-say-scientists

Slow Arctic freeze raises risk of polar bear extinction, say scientists
Record absence of ice after freak warm spells denies pregnant bears birthing dens and triggers ‘extirpation event’ warning

Quote
A record slow freeze of many regions of the Arctic this winter is making it harder for pregnant polar bears to find birthing dens.

The delayed formation of sea ice during autumn has worried biologists, who fear a first “extirpation event” – the local extinction of a species – may be approaching faster than forecast for the most affected populations.

The waters around Svalbard, an archipelago between Norway and the North Pole, have a little over half the average area of ice for this time of year. According to the Norwegian Ice Service, the 172,291 sq km (66,522 sq m) of ice on 14 November was the lowest for this time of year since records began in 1967.

October also saw a huge departure from previous trends, particularly in the Barents Sea, which had freakishly warm weather in February and August. Scientists say these shifts, which are caused by the manmade heating of the globe, are disrupting the behaviour of species that depend on thick winter ice, such as narwhals, seals, belugas and polar bears.
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
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sidd

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Re: Wildlife
« Reply #215 on: November 29, 2018, 08:01:00 AM »
Beaverage in Alaska: Tundra be Dammed

(I kid you not, that second phrase is part of the title of the paper)

" ... beavers are rapidly expanding their range via major rivers and streams ..."

" ... range expansion in the northwest arctic of Alaska has occurred at an average rate of 8 km/year ... "

" ... beaver dams on the Seward Peninsula (even further from treeline than in the primary study region in Figure 2) and a dozen potential beaver dams in the tundra regions of north-central Brooks Range of Alaska. The location of these dams indicates that beavers likely are colonizing the north-central Brooks Range ... "

"Thermokarst landforms have developed adjacent to new ponds and new stream channels made by beavers, as well as downstream of failed beaver dams ... "

"permafrost that constitutes arctic tundra soils thus makes the tundra uniquely vulnerable to beavers."

doi:10.1111/gcb.14332

coverage at

https://www.sciencenews.org/article/beavers-are-engineering-new-alaskan-tundra

sidd

magnamentis

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Re: Wildlife
« Reply #216 on: November 29, 2018, 04:41:41 PM »

"permafrost that constitutes arctic tundra soils thus makes the tundra uniquely vulnerable to beavers."


considering you kind of posts i think i don't get the point here, probably a language barrier ;)
so please elaborate for me the following:

"vulnarable to beavers" how can nature be vulnarable to one of it's native inhabitants? well suited or something along this line is what i would choose as a term, in my translation "vulnarable" sound like
if the tundra would be at risk through the migration of beavers ?

sorry i'm quite sure i just miss something but would like to know what that is ;) T.I.A for your help ;)
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oren

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Re: Wildlife
« Reply #217 on: November 29, 2018, 05:11:16 PM »
Magna, the beavers are natives but they are expanding rapidly into new (tundra?) territories.

Tor Bejnar

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Re: Wildlife
« Reply #218 on: November 29, 2018, 05:27:41 PM »
Magnamentis,
I'm quite sure your interpretation that 'the survival of tundra is at risk due to invading beavers' is correct.  included in Sidd's post is "Thermokarst landforms have developed adjacent to new [beaver] ponds ..."  From Wikipedia and the National Geographic, I learn that developing thermokarst is strongly associated with melting of permafrost and the release of carbon into the atmosphere.  Tundra ecosystems are considered to be "among the most sensitive habitats in the world".
Arctic ice is healthy for children and other living things.

magnamentis

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Re: Wildlife
« Reply #219 on: November 29, 2018, 07:10:55 PM »
thx for various replies, so the beaver is indicating that tundra becomes something else than turndra due to global warming, hope i got that right now, beaver is not the cause but a result with indicative property.
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Tor Bejnar

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Re: Wildlife
« Reply #220 on: November 29, 2018, 08:11:58 PM »
My interpretation from what I've read (today) is that beavers can move into tundra areas because of climate change (warmer? more to eat? I don't know - obviously, something to eat is part of it), and that they speed up certain processes (thermokarst) by building dams.  I appreciate your "tundra becomes something else than tundra", Magnamentis, as what I read didn't say, other than 'shallow ponds and lakes'.
Arctic ice is healthy for children and other living things.

Red

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Re: Wildlife
« Reply #221 on: November 30, 2018, 11:24:21 AM »
The past year is bad enough.

Significant whale strandings in NZ since 2010
November 26, 2018

145 pilot whales died after stranding in Mason Bay on Stewart Island.

November 25, 2018
12 whales, understood to be pygmy killer whales, stranded south of Te Paki Stream in Northland. 10 survived.


November 23, 2018
A 15-metre sperm whale died after being stranded at Tokeroa Beach in Doubtful Bay in Northland.

August 5, 2018
2 whales stranded on Baylys Beach near Dargaville. 1 died.

July 9, 2018
2 rare pygmy right whales died at Taupo Bay in Northland.

May 23, 2018
8 sperm whales died after becoming stranded on a South Taranaki beach.

April 5, 2018
32 pilot whales stranded at the mouth of the Okuru River. At least 21 died.

https://www.nzherald.co.nz/index.cfm?objectid=12166302&ref=twitter

https://www.tvnz.co.nz/one-news/new-zealand/more-than-50-whales-dead-after-another-mass-stranding?fbclid=IwAR0kKanjsxHSLpTMj984P0dvYeZrDfsi6pNa5PtCsDlH5qEE6FD4SCpBwpQ