Tuesday 25 December 2012

Wildlife campaigners


Polar bear trade ban divides campaigners

polar bears and waterSome campaigners argue that the key issue for polar bears is climate change

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Wildlife campaigners are at odds over a new attempt to ban the global trade in polar bear parts.
Some activists say the market for rugs and ornaments made from the bears is driving them to extinction,
But others argue that the most pressing problem for the species is climate change and the disappearance of polar ice.
The issue will be decided at a UN wildlife conservation meeting in Thailand in March 2013.
The Humane Society International/UK says that polar bears have been brought to a tipping point by climate change but that increased hunting in recent years is pushing the species "beyond the brink."

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We can't be arguing for the science when it suits us and then ignore it when it doesn't suit our case”
Dr Colman O'CriodainWWF
"The drivers for the increase in recent years in the trade in polar bear parts are the extremely worrying and rapidly increasing prices being paid on international markets for polar bear parts," said Mark Jones, executive director of the Humane Society International/UK
He points to the fact that in the five years up to 2012 there has been a 375% increase in the number of polar bear skins offered at auction, some selling for as much as $12,000 (£7.400).
Opinions divided
Every year around 600 bears are legally killed by hunters in Canada and in the decade to 2010 more than 30,000 bear parts were traded as trophies, rugs and ornaments.
Opponents of the trade have now proposed a ban on the international sales of polar bear parts. It will be tabled at the next meeting of the Convention on the trade in endangered species (CITES) taking place in Thailand next March.
The move is being supported by the US and Russian governments. The last time an attempt was made to change the ruling in 2010, it wasdefeated after the UK and the EU voted against. Mark Jones believes the UK government's position is very influential and wants them to support the ban.
"We urgently need the British government to step forward and be a champion for polar bears by supporting their maximum protection," he added.
polar bear skinsA grisly collection of polar bear skins which can sell for extremely high prices
But some prominent campaigners are against changing the protected status of the bears. WWF has had a long association with the iconic species but believes that the threat from international trade is not significant compared to the threat from climate change.
"If we were tempted to support it on the basis of trade being a major threat, it is not," says Dr Colman O'Criodain, WWF's wildlife trade policy analyst.
"We have to focus on what is the major threat and not distract ourselves with a relatively minor one. We can't be arguing for the science when it suits us and then ignore it when it doesn't suit our case." he added.
Little impact
WWF are supported by other groups including Traffic International and IUCN. But Mark Jones says the Humane Society International have broad support for their position as well.
"We're members of a very big campaigning group called the species survival network and we do believe we have a very wide consensus among groups on this particular issue." he said.
Dr Colman O'Criodain says that WWF won't actively campaign against the ban and will accept it if it is voted through. But he argues that would be a bad outcome for polar bears.
"You could say that this is just a distraction factor and that it could have the effect of making people think something has been done to address the threat when the net effect will be almost negligible." he said.
Indigenous groups in Canada are actively working against the proposed ban. And they particularly resent the fact that the US is leading the charge for change.
"The American government is using the threat of climate change to justify banning the international trade in polar bear parts while utterly failing to do anything to reduce their own activities" said James Eetoolook of the Nunavut Tunngavik, a group that represents Inuit interests.
They argue that their own research in the western Hudson Bay region carried out earlier this year indicated that bear numbers were increasing rather than declining.
Campaign groups in favour of the new ban are taking comfort from the fact that some governments are still undecided.
A spokesperson for the UK's department of the environment, farming and rural affairs added:
"We are currently considering the proposals ahead of the Conference of the Parties meeting next year."
Follow Matt on Twitter.

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Saturday 8 December 2012

Doha climate talks: US faces dilemma over final text


Doha climate talks: US faces dilemma over final textNGO protests at the talks in Doha, Qatar

Various NGOs have protested at the talks in Doha

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There has been a historic shift in the UN climate talks in Qatar, with the prospect of rich nations having to compensate poor nations for losses due to climate change.
The US has fiercely opposed the measure - it says the cost could be unlimited.
But after angry tussles throughout the night the principle of Loss and Damage is now in the final negotiating text.
Small island states at risk from inundation say they will walk out if the US vetoes the proposed deal.
The political stakes are high. The EU's position is not yet well defined, but soundings suggest that it can live with the text.
The US will be seeking support from other big polluters - like Canada - likely to face liability for climate damages.
If the US is left alone fighting against the chair's text, its negotiators face a dilemma - either to bow to the majority and accept that the nations which caused climate change bear a moral responsibility to other nations damaged by it, or to refuse to sign.
If the US vetoes the text, President Barack Obama will be accused of hypocrisy and failure after re-committing himself to tackling climate change since his re-election.

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"I will block this. I will shut this down”
Todd SternUS chief negotiator
If he agrees the text he will face criticism from Republicans, whilst he tries to negotiate his own deal over US government finances.
One campaign group in Doha tweeted that before the text was agreed Todd Stern, the US chief negotiator, was heard saying: "I will block this. I will shut this down."
Saleem ul-Huq, from the think-tank IIED, told the BBC: "This is a watershed in the talks. There is no turning back from this. It will be better for the US to realise that the principle of compensation is inevitable - and negotiate a limit on Loss and Damage rather than leave the liability unlimited.
"[President Obama] has just asked Congress for $60bn (£37bn) for the effects of Sandy - developed nations are already having to foot the bill for loss and damage of their own."
The Qatari chair has warned delegates that only a few hours remain to sign off the deal. He says the conference will not overrun by another day.
Principle at stake
It is a point of principle that is at stake here for developing countries. In the end it's questionable how much extra money a Loss and Damage Mechanism might bring.
Already poor nations are bitter that rich nations, particularly the US are dragging their feet over a promise made at the failed Copenhagen climate summit to mobilise $100bn by 2020 to help poor nations get clean energy and adapt to climate change.
The developing countries say the original sum was too low - especially in the light of Mr Obama's request to Congress for Sandy damages of $60bn, and the UK's bid to raise £200bn for clean energy by 2020.

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Friday 7 December 2012

New contender for oldest dinosaur


New contender for oldest dinosaur

Artist's conception of Nyasasaurus parringtoniNyasasaurus parringtoni would have shared the land with silesaurs, identified as dinosaurs' closest relatives

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Palaeontologists have found what is likely to be the oldest known dinosaur, filling in a yawning evolutionary gap.
study in Biology Letters describes Nyasasaurus parringtoni, a new species from 10-15 million years before the previous earliest dinosaur specimens.
It walked on two legs, measured 2-3m in length with a large tail and weighed between 20 and 60kg.
The find suggests that many millions of years passed between dinosaurs' first members and their dominance on land.
"It fills a gap between what we previously knew to be the oldest dinosaurs and their other closest relatives," report co-author Paul Barrett, of the Natural History Museum in London, told BBC News.
Pangaea artworkThe find shores up the idea that dinosaurs evolved on the southern parts of the supercontinent Pangaea
"There was this big gap in the fossil record where dinosaurs should've been present and this fossil neatly fills that gap."
However, the team behind the work has stopped short of definitively calling N parringtoni the earliest dinosaur, because the fossil skeletons used to define it were incomplete: one upper arm bone and six vertebrae.
The early evolution of dinosaurs is difficult to unpick, as a rich variety of reptiles were proliferating at the time - and some may even have independently evolved characteristics that are associated with dinosaurs.
The researchers, from the University of Washington and University of California Berkeley in the US and the Natural History Museum, re-examined a number of bones that were first collected from what is now Lake Malawi in southern Africa.
They saw a few features that are unambiguously those of dinosaurs - notably what is called an "elongated deltopectoral crest" that served as an anchor for strong pectoral muscles.
Lead author of the research Sterling Nesbitt, of the University of Washington Seattle, led a team that in 2010 reported the finding of dinosaurs' oldest relative, a member of a group called the silesaurs.

Our ancient planet

Planet Earth's geology - a coastal, rocky scene
It now appears that those creatures shared the southern part of the supercontinent Pangaea - now South America, Africa, Antarctica and Australia - with N parringtoni.
"Those animals were the earliest of this group that led up toward dinosaurs," explained Dr Barrett. "Now this takes dinosaurs back to the right kind of time when those two groups would have split apart from each other."
As it closes that evolutionary gap, it shows that dinosaurs did not start out as dominant as they later became.
"We push the origin of dinosaurs further back in time to a time when lots of reptile groups are evolving," Dr Barrett said.
"Dinosaurs start out as a very insignificant group of reptiles - all relatively small animals, relatively rare in comparison with other reptile groups - and it's only a bit later in their history that they suddenly explode and take over as the dominant forms of life for nearly 100 million years."

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Doha


Climate compensation row at Doha

ProtestProtesters hit out at the "hot air" surplus some nations want to carry over into the next Kyoto Protocol commitment period

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Frustration at slow progress of the UN climate talks bubbled over when a spokesman for small island states (AOSIS) rounded on rich nations.
US representative Jonathan Pershing had been discussing plans to compensate poor nations for losses due to damage from climate change.
But AOSIS spokesman Ronald Jumeau condemned wealthy countries for their lack of urgency.
The UN talks are into their second week in the Qatari capital.
Mr Jumeau said that there would be no need for talk about compensation if the rich had cut their emissions in previous meetings.
"The Doha caravan seems to be lost in the sand," he told a joint news conference. "As far as ambition is concerned, we are lost.
"We're past the mitigation (emissions cuts) and adaptation eras. We're now right into the era of loss and damage. What's next after that? Destruction? Disappearance of some of our islands?
"We're already into the era of re-location. But after loss and damage there will be mass re-locations if we continue with this loss of ambition."
The issue of compensation for climate losses looks set to become a major focus for negotiations at the conference.
The task of the meeting is to wind up negotiations under talks associated with the existing Kyoto Protocol on cutting emissions of greenhouse gases, and move towards a new treaty in 2015 binding all nations, rich and poor in tackling climate change.
Developing countries are attempting to bolt down as many commitments as possible and they sense that there may be some movement on a new mechanism for loss and damage.
The idea is being backed in a petition to governments by 44 NGOs representing millions of people concerned about the impacts of climate change. It has been led by Care.
"The first and foremost response must be to immediately and dramatically cut emissions and help vulnerable countries and ecosystems adapt to new climate realities, " it says. "Governments must now also recognize that we are in a "third era" and redress the permanent loss and damage from climate impacts.
"Given historic inaction by developed countries we are heading for the biggest social injustice of our time."
They urge governments to establish a formal mechanism for loss and damage (the word "compensation" is being avoided; some nations, including the US won't countenance it because of the implication of guilt). They also want the UN to monitor and assess losses, and to find new approaches for addressing loss and damage, particularly for slow-onset events like, say, sea level rise.
Nick Mabey from the think-tank E3G told BBC News it was useful that the issue of long-term risk might become embedded in the negotiations. There were costs, he said, to avoiding action to cut emissions:
"The debate on loss and damage brings an important new dimension to the climate negotiations. The costs of failing to reduce climate risk must be internalised in the negotiations or agreement will be reached merely by lowering ambition for mitigation ."
"With a truly global agreement now possible in 2015, countries must now decide how much climate risk they are willing to take and what they are willing to do to reduce their exposure."
Mr Jumeau, from the Seychelles, went out of his way to praise the UK for its leadership on climate change, especially for its re-stated pledges of increased finance to help poor nations get clean energy - £1.8bn by 2015.
Germany followed by promising to increase its contributions further.
A spokesman for the UK delegation told BBC News: "The UK is still taking part in important negotiations around loss and damage. So far, we have indentified a number of areas where parties agree and we are working hard to find common agreement on the way forward."
Back in the UK, the Chancellor George Osborne was facing complaints from some Conservatives that money was going on climate finance when budgets were being cut for services in Britain.
His gas strategy, published alongside the Autumn Statement, confirms that he wants to review and maybe scrap the UK's unilateral targets on reducing emissions.
Follow Roger on Twitter

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Monday 29 October 2012

Ash tree import ban to halt disease


Ash tree import ban to halt disease

Ash leaves emergingA ban on the import of ash trees will come into force on Monday in an attempt to halt the spread of a deadly disease, the environment secretary has said.
Owen Paterson has denied ministers were slow to react to the outbreak.
The Chalara fraxinea fungus, which causes Chalara dieback, has already killed 90% of ash trees in Denmark and has been found in East Anglia.
Mr Paterson said 50,000 ash trees have already been destroyed to try to prevent the spread of the disease.
Until earlier this week, the disease had only been recorded in a few nursery specimens.
Mr Paterson said: "We will bring in a ban on Monday. I have already prepared the legislation and we're ready to go. The evidence is clearly there."
The disease was first spotted in February, at a nursery in Buckinghamshire - a case that was confirmed in March, said the environment secretary.
Since then, examinations had been carried out at more than 1,000 sites and tree experts had been consulted.
Mr Paterson said ash trees were not imported commercially during the summer, so the amount of time that had elapsed since the initial discovery had not increased the risk that more infected trees had been brought in.
More widespread
But Tim Briercliffe from the Horticultural Trades Association insisted the government's response to the disease had been too slow.
He said: "As a trade we're very frustrated about it, because in 2009 we saw it out in Denmark on trees and we said you should ban imports now.
"They didn't do it - they suggested that it was already endemic across Europe and across the UK, and since then the disease has continued to come in, and we believe it could be more widespread than perhaps we realise at the moment."
The Woodland Trust welcomed the ban but called on the government to set up an emergency summit to manage other diseases affecting trees in the UK.
Its chief executive, Sue Holden, said: "Ash dieback is only one of numerous tree pests and diseases present in the UK... it is crucial that the wider issue is tackled."
Ash trees suffering with C. fraxinea have been found across mainland Europe, with Denmark reporting the disease has wiped out about 90% of its ash trees.
Experts say that if the disease becomes established, then it could have a similar impact on the landscape as Dutch elm disease had in the 1970s.
This outbreak resulted in the death of most mature English elm by the 1980s. Elms have recovered to some extent but in some cases only through careful husbandry.
The East Anglia outbreak has been confirmed by plant scientists from the Food and Environment Research Agency (Fera) at the Woodland Trust's Pound Farm woodland in Suffolk, and Norfolk Wildlife Trust's Lower Wood reserve, in Ashwellthorpe.
In a statement, the Woodland Trust said that the fungal infection had been found in "mature ancient woodland and woodland creation areas on our estate".
The disease has the potential to devastate the UK's ash tree population.
Visible symptoms include leaf loss and crown dieback in affected trees and it can lead to tree death.
In Europe, affected trees are not just in woodlands but are also being found in urban trees in parks and gardens and also nursery trees.
Chalara dieback of ash has been listed as a quarantine pathogen under national emergency measures and the Forestry Commission has produced guidance, including help on how people can identify possible signs of infection.
Experts are urging people to report suspected cases of dieback in order to prevent the spread of the disease to the wider environment becoming established.

Sunday 7 October 2012

Mammoth carcass found in Siberia


Mammoth carcass found in Siberia

RemainsThe carcass, discovered on Russia's Taimyr Peninsula, still has one of its tusks

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A well-preserved mammoth carcass has been found by an 11-year-old boy in the permafrost of northern Siberia.
The remains were discovered at the end of August in Sopochnaya Karga, 3,500km (2,200 miles) northeast of Moscow.
A team of experts from St Petersburg then spent five days in September extracting the body from frozen mud.
The mammoth is estimated to have been around 16 years old when it died; it stood 2m tall and weighed 500kg.
It has been named Zhenya, after Zhenya Salinder, the 11-year-old who found the carcass while walking his dogs in the area.
Alexei Tikhonov, from the St Petersburg Zoology Institute, who led the team excavating the mammoth, said this specimen could either have been killed by Ice Age humans, or by a rival mammoth.
He added that it was well preserved for an adult specimen.
His colleague Sergei Gorbunov, from the International Mammoth Committee, which works to recover and safeguard such remains, said: "We had to use both traditional instruments such as axes, picks, shovels as well as such devices as this "steamer" which allowed us to thaw a thin layer of permafrost.
"Then we cleaned it off, and then we melted more of it. It took us a week to complete this task."
But several juvenile examples have come to light that are more complete.
Earlier this year, a very well preserved juvenile mammoth nicknamed Yuka was unveiled by scientists.
Found in the Yakutia region of Russia, it preserves much of its soft tissue and strawberry-blonde coat of hair. There were also signs from its remains that humans may have stolen the carcass from lions and perhaps even stashed it for eating at a later date.

Wednesday 12 September 2012

Virgin births


Virgin births discovered in wild snakes

A female copperhead snake and her parthenogenic son (c) Charles Smith and Pam EskridgeA virgin female and her son

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Virgin births have been reported in wild vertebrates for the first time.
Researchers in the US caught pregnant females from two snake species and genetically analysed the litters.
That proved the North American pit vipers reproduced without a male, a phenomenon called facultative parthenogenesis that has previously been found only in captive species.
Scientists say the findings could change our understanding of animal reproduction and vertebrate evolution.

Single sex

Komodo dragon
It was thought to be extremely rare for a normally sexual species to reproduce asexually.
First identified in domestic chickens, such "virgin births" have been reported in recent years in a few snake, shark, lizard and bird species.
Crucially though, all such virgin births have occurred in captivity, to females kept away from males.
Virgin births in vertebrates in general have been viewed as "evolutionary novelties", said Warren Booth, from the University of Tulsa, Oklahoma, US.
Professor Booth is lead author of a paper published in the Royal Society's Biological Letters that challenges this label.
He and his collaborators investigated virgin births in wild populations of two geographically separated and long-studied species of snake.

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The frequency is what really shocked us”
Dr Warren BoothUniversity of Tulsa
They captured pregnant copperhead and cottonmouth female pit-vipers from the field, where males were present.
The snakes gave birth, allowing the scientists to study the physical and genetic characteristics of the litters.
Of the 22 copperheads, the scientists found one female that must have had a virgin birth.
Another single virgin birth occurred within the 37 cottonmouth litters.
"I think the frequency is what really shocked us," said Prof Booth.
"That's between 2.5 and 5% of litters produced in these populations may be resulting from parthenogenesis.
"That's quite remarkable for something that has been considered an evolutionary novelty," he said.
Sex or no sex
A virgin birth, or parthenogenesis, is when an egg grows and develops without being fertilised by sperm.
It results in offspring that only have their mother's genetic material; no fatherly contribution is required.
This is not uncommon in invertebrates such as aphids, bees and ants.
It also happens in a few all-female species of lizard; geckos and whiptails for example. But here it occurs across a generation; all female reproduce asexually via a process called obligate parthenogenesis.
But asexual reproduction by a normally sexual vertebrate species is still rare, having been reported in under 0.1% of species.
It was only in the mid-1990s that virgin births began to be documented in captive snakes, followed by a captive giant lizard in 2006 and a captive shark in 2007.
A whiptail lizard (c) Rolf NussbaumerAll female species, such as some whiptail lizards, reproduce asexually
To date this now includes around 10 species of snakes including a couple of boas, and a python, four species of shark, and several monitor lizards, including the endangered Komodo dragon.
Recently the zebra finch and Chinese painted quail were added to the list. All were kept in isolation in unnatural conditions and away from any males.
So to find asexual reproduction in two species of snake in the wild on their first attempt was "astounding", according to Prof Booth and his collaborators.
Virgin births should no longer be viewed as "some rare curiosity outside the mainstream of evolution," he said.
Evolutionary dead-end?
It remains unclear whether the female snakes actively select to reproduce this way, or whether the virgin births are triggered by some other factor, such as a virus or bacterial infection.
"Any answer is pure speculation at this point," says Prof Booth.
In captivity, two sharks, and three snakes, have been shown to have had multiple virgin births, producing more than one litter via facultative parthenogenesis.
As yet, it also remains unclear whether the offspring of these wild virgin births can themselves go on to have normal, or virgin births of their own.
In captive snakes studied so far, offspring have so far not been proved viable, that is capable of surviving and reproducing.
A cottonmouth pit-viper (c) Tom Spink / FlickrCottonmouth pit vipers are capable of virgin births in the wild
However, earlier this year Prof Booth and colleagues reported that a checkered gartersnake that has had consecutive virgin births, appears to have produced viable male offspring.
Parthenogenicly born copperheads and cottonmouths are also currently being raised and "in the next two to three years we will know if they are indeed viable," said Prof Booth.
"If they cannot survive and reproduce, then this is a reproductive dead-end.
"However, if they are healthy and can reproduce, that opens an entirely new avenue for research," he said.
Being able to switch from sexual to asexual reproduction could be advantageous; in the absence of males a female could still give birth and start a new, albeit inbred, population.
Her genes could still be passed on via her fertile male offspring.
Scientists believe that facultative parthenogenesis is more common in some lineages such as reptiles and sharks.
However it is unlikely that similar virgin births will be found among placental mammals, which include all the mammals aside from the platypus and echidnas.
That is because mammals require a process called genomic imprinting to reproduce, where a set of genes from one parent dominates over the other. The interaction between the two sets of parental genes is required for embryos to develop normally.

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