World's 'number one frog' faces extinction from New Zealand government

Jeremy Hance
mongabay.com
May 26, 2010



Archey's frog is a survivor: virtually unchanged evolutionarily for 150 million years, the species has survived the comet that decimated the dinosaurs, the Ice Age, and the splitting of continents. Seventy million years ago New Zealand broke away from Australia, essentially isolating Archey's frog and its relatives from all predatory mammals. Yet, if the New Zealand government has its way this species may not survive the century, let alone the next few decades.

The New Zealand government has put forward a controversial proposal to begin opening three of the nation's protected areas to mining: Great Barrier Island, Paparoa National Park, and Coromandel Peninsula where the last populations of Archey's frogs live. According to critics, the government's proposal could push Archey's frog toward extinction, while negatively impacting a number of other endangered species, beloved wild lands, and a nation driven by tourism.

The Jurassic Frog

The conservation program EDGE considers the Archey's frog to be a truly one-of-a-kind species. In fact, it is the organization's top amphibian.


Archey's frog (Leiopelma archeyi). Photo courtesy of Phil Bishop.
"Archey’s New Zealand frog is an incredibly special animal and an asset to global biodiversity. It is the world’s most Evolutionarily Distinct and Globally Endangered [EDGE] amphibian out of more than 6,500 species—or 'Number 1 EDGE Amphibian' for short," explains Helen Meredith, EDGE's Amphibian coordinator. EDGE is a unique conservation program with the Zoological Society of London. "Archey’s frog is almost indistinguishable from the fossilized remains of frogs that lived 150 million years ago […] These frogs were around before the Atlantic Ocean existed, and before the planet’s highest mountain range—the Himalayas—had even started to form."

EDGE's number one mammal, the baiji or Yangtze River dolphin, has already likely succumbed to extinction, and the organization is anxious not to lose the world's number one amphibian as well.

A number of traits distinguish Archey's frog: it has an additional vertebrae, cartilage in the abdomen, no ear drums, and has muscles for wagging a tail, but no tail. This last feature is likely a relic from its ancestor amphibians who once sported tails. They also squeak instead of croaking.

"Frogs very similar to Archey’s were hoping around the feet of dinosaurs," Dr. Phil Bishop, a herpetologist (specialist in amphibians and reptiles) and professor at the University of Otago in New Zealand, told mongabay.com. "In the isolated environment of New Zealand with no mammalian predators or competitors the frogs have changed very little over the last 70 million years."

In addition to unique traits, Archey's frog does not give birth to tadpoles like most frog species; instead the tadpole stage happens in the eggs.


New Zealand's Coromandel Peninsula could be opened up to mining, if the federal government has its way.
"So, what actually hatches out," explains Bishop, "is a little tailed froglet about to metamorphose."

Although a population of approximately 40 Archey's frogs is kept at the Auckland zoo and the University of Otago, this rare species has proven tremendously difficult to breed in captivity.

"Despite years of work at these (and other) facilities, very few froglets have ever been produced and only one froglet has ever been raised to adulthood," Kevin Buley of the Auckland Zoo says, adding that very little is understood about the embattled species.

"For example, we still cannot reliably differentiate between the sexes of live frogs. Husbandry procedures are constantly being refined but we could still be years away from being able to reliably breed the species in captivity," Buley explains. He says that working with the number one EDGE amphibian is a "privilege and a unique opportunity", but also "incredibly challenging".

New Zealand government: open protected areas for mining

Named as EDGE's number one amphibian means that Archey's frog is not only an evolutionary treasure—representing the ancient origin of all modern frogs —but is also on the edge of extinction. Struck by disease, alien predators, and climate change the IUCN Red List currently classifies the frog as Critically Endangered. Still the species survives—if not thrives; but conservationists are deeply concerned that the New Zealand government's plans to open up three protected areas, all classified as Schedule Four, to mining would further imperil Archey's frog as well as other endangered flora and fauna.

According to Nicola Vallance—an advocate with the local conservation organization Forest and Bird—New Zealand's designation of Schedule Four "identifies conservation land, which due to its high conservation values, should be excluded from the possibility of being mined. This land includes national parks, nature reserves and scientific reserves—land considered to be core conservation land. About 40 percent of the conservation estate (13 percent of New Zealand’s landmass) is in Schedule Four."


Otahu Ecological Area in the Coromandel-targeted for mining. Photo courtesy of Forest and Bird.
Bishop, one of the world's foremost experts on Archey's frogs, is unequivocal on how the mining will impact the Critically Endangered frog: "the mining has the potential to push Archey’s over the edge and could drive them to extinction. They have already suffered a dramatic decline to less than 20 percent of their former distribution probably through disease, but if we destroy their habitat too there is no way they will be able to recover."

Bishop says that due to their natural history, Archey's frogs are not conducive to change.

"[Archey's frogs] put all their reproductive efforts into quality offspring, so they only have a few eggs at a time (about 12 or so) and they look after them. They are very long lived, don’t move around much and only breed every other year—not very good attributes to have if you live in a rapidly changing environment."

Vallance says that the mining in the parks is likely to be open cast mining since the minerals are not found in dense quantities. Such mining would be particularly devastating to the environment as it requires removing all the rock, soil, and vegetation.

"This sort of habitat destruction is the number one cause of amphibian declines, affecting more species than any other threat by a factor of at least four. Sadly, it is also a threat that is entirely under our control," says Kevin Zippel, Amphibian Program Director with Amphibian Ark, an organization dedicated to saving amphibians from extinction during a time when they are vanishing rapidly. "Development has its place, and that is outside areas of high conservation value, such as these frogs' habitat. Other factors behind amphibian declines include pollution, climate change, disease, over-harvesting, and introduced species, all of which are caused by people. People have been the problem, people must be the solution."


Martha mine in Waihi, New Zealand. Photo by: Kim Westerskov.
Currently, one third of amphibians are threatened with extinction and 120 species are thought to have gone extinct in just the last thirty years, leading many herpetologists to warn of an impeding amphibian mass-extinction.

The proposal to mine in protected areas is a new development in New Zealand put forward by the current administration, headed by Prime Minister John Key.

"I believe the John Key government will prioritize the interests of the extractive industries with whom they have a relationship over the interests of New Zealand as a whole," Member of Parliament Metiria Turei told mongabay.com. MP Turei is the co-leader of New Zealand's Green Party.

"This government believes in economic growth at any cost and will support short term economic opportunities as this entrenches their political positioning. It is very difficult to see where the benefit [of mining] is, unless one accepts the word of the mining industry itself. The government often parrots industry figures about job creation and economic opportunities, when in fact, there are very few protections and very little economic opportunity for the broader New Zealand community."

Vallance adds that "New Zealand’s current Government has a terrible lack of understanding and respect for our natural heritage, which most New Zealanders treasure dearly."

Despite being largely urban, New Zealanders, according to Vallance "like to think of ourselves as people of the forest, mountains and the sea."

Protests and submissions

True to Vallance's words, New Zealanders are not taking the government's plan lying down—far from it. On May 1st 40,000 New Zealanders turned out in a march against the proposed mining. The march was called by the New Zealand Heraldas the 'biggest in a generation'.


Archey's frog in the wild. Photo courtesy of Phil Bishop.
"Politically, this support sends a clear message to John Key that the broad section of the public will not accept the mining of these areas," says MP Turei. "More generally, it highlights a growing dissatisfaction with this governments overall political and economic direction."

New Zealanders didn't just march to save a frog according to Nicola Vallance; they marched to protect beloved wild lands, their green reputation, and their most important industry.

"New Zealanders are fiercely proud of their National Parks and other protected areas—not the least of which because these areas form the basis of our internationally renowned 'clean and green' image for tourism, which is our highest earner, bringing in around $21 billion a year," explains Vallance.

In addition to the protest, this week 35,000 submissions were sent to the federal government regarding the mining issue. Prime Minister Key, in reaction to the flood of submissions, said they government would "reflect on what we've learnt." According to local news sources the government has begun considering cutting the area to mine in half, but such a plan would still involve mining in conservation areas.

Not just Archey's

Archey's frog has become the media star for the fight to save these conservation areas, but this is not the only species that would be impacted by mining, nor the only frog. Archey's share their the Coromandel region with Hochstetter's frog (Leiopelma hochstetteri). Only four frog species are native to New Zealand, making the Coromandel Peninsula conservation area home to 50 percent of New Zealand's frog species.


'Pancake rocks' in Paparoa. Photo by James Shook.
Closely related to Archey's frog, "Hochstetter's frogs are slightly more aquatic as they are found at the edges of streams and under stones in stream beds. They also have slightly webbed back feet and have a 'tadpole' stage that is almost free-living. They are also more robust in stature than Archey’s and very slightly bigger overall," Bishop explains.

Currently, Hochstetter's frog is listed as Vulnerable to extinction by the IUCN Red List, though if mining occurs near or in their habitat that classification could be raised.

But it's more than frogs, says Vallance: "New Zealand is known as one of the IUCN 'hotspots' for biodiversity, along with Madagascar, parts of Africa, the Galapagos etc, and our wildlife is ancient and very unique, having evolved in isolation for 80 million years."

Vallance explains that mining in Coromandel peninsula could also impact a large population of kiwis, long tailed bats, and freshwater species.

On the west coast of the South Island, Paparoa National park is home to an endangered fern species Asplenium cimmeriorum that was only discovered in the 1990s. As well, the peninsula is important for many bird species, including great spotted kiwi (listed as Vulnerable), kaka (Endangered), kereru (Near Threatened), weka (Vulnerable), and yellow-crowned parakeets (Near Threatened).

"The forests [of Paparoa National Park] are crucial for feeding and sheltering in colder months for birds that live higher up the ranges at other times," says Vallance.


Hochstetter's frog. Photo courtesy of Forest and Bird.
The stand-out species for the third park, Great Barrier Island, are the chevron skink (Vulnerable) and the brown teal (Endangered).

"There are simply some areas of our natural environment that should be free from extractive industries," MP Turei says, who recently put forward a bill to strengthen protections pertaining to New Zealand's parks. "We have a very limited land mass in Aotearoa [the Maori name for New Zealand], and once destroyed our natural heritage cannot be replaced. […] It is important as a community that we work to protect these species and their habitats for our future. Our communities will endure as long as the land endures—at heart our land provides us with a long term security we risk at our peril,"

In the end whether or not Archey's frog (and the wild lands of Paparoa, Coromandel, and Great Barrier Island) will be allowed to survive unscathed will not be decided by biology—i.e. evolutionary processes—but human politics: a fickle and often myopic occupation indeed. Yet from tens of thousands of protesters, outcries from both scientists and leaders, and a flood of public submissions, it is clear that in this case at least the citizens of New Zealand are on the frog's side.



For more information and to voice your opinion: Forest and Bird

Another place to voice your opinion: SAVE THE FROGS New Zealand campaign

EDGE blog on the issue: EDGE: Save the New Zealand Frogs







Related articles

A day to celebrate (and save) the world's amphibians: the 2nd Annual Save the Frogs Day
(04/28/2010) Friday, April 30th is for the frogs: educational programs, conservation walks with experts, frog leaping races, and the world's first protest to save frogs are all planned for the world's 2nd Annual Save the Frogs Day. Organized by the non-profit SAVE THE FROGS!, events are so far planned in 15 countries on every continent besides Antarctica—fittingly the only continent that lacks amphibians.


Frog in Australia goes from 'extinct' to very, very endangered
(03/08/2010) Facing habitat loss, pollution, climate change, and the devastating chytrid fungus, there has been little positive news about amphibians recently. However, a story out of Australia brings a much needed respite from bad news. In 2008 Luke Pearce, a fisheries conservation officer, stumbled on a frog that had been thought to be extinct for over thirty years. Not recorded since the 1970s, Pearce rediscovered the yellow-spotted bell frog (Litoria castanea) on rural Australian farmland in the Southern Tableland of New South Wales.


Photos: Madagascar's wonderful and wild frogs, an interview with Sahonagasy
(03/03/2010) To save Madagascar's embattled and beautiful amphibians, scientists are turning to the web. A new site built by herpetologists, Sahonagasy, is dedicated to gathering and providing information about Madagascar's unique amphibians in a bid to save them from the growing threat of extinction. "The past 20 years have seen resources wasted because of a poor coordination of efforts," explains Miguel Vences, herpetologist and professor at the Technical University of Braunschweig. "Many surveys and reports have been produced that were never published, many tourists found and photographed amphibians but these photos were not made available to mapping projects, many studies carried out by Malagasy students did not make use of literature because it was not available."


Common pesticide changes male frogs into females, likely devastating populations
(03/01/2010) One of the world's most popular pesticides, atrazine, chemically castrates male frogs and in some instances changes them into completely functionally females, according to a new study in the Proceedings of the National Academy of Sciences. The authors conclude that atrazine likely plays a large, but unsuspected role in the current global amphibian crisis.


Bronx Zoo puts 'extinct' frogs on display
(02/02/2010) The Bronx Zoo has a put a most unusual frog on display: the Kihansi spray toad. For one thing, the Kihansi spray toad survived on only 5 acres in the Kihansi gorge in Tanzania, adapted to the areas' unique and constant mist from the gorge and a waterfall. For another, female Kihansi spray toads give birth to live young, instead of laying eggs. Finally, the Kihansi spray toad is extinct—at least in the wild.


Photos: New tropical frog undergoes remarkable transformation
(02/01/2010) Nature never runs out of surprises. Exploring Sudest Island off of Papua New Guinea, researchers discovered a new species of frog that drastically changes its appearance from juvenile to adulthood, a transformation that has never been seen in another frog.The new species, named Oreophryne ezra, is shiny black with bright yellow spots. Yet when it matures, the frog becomes rose-colored and even its eyes change from black to blue.


Gone: a look at extinction over the past decade
(01/03/2010) No one can say with any certainty how many species went extinct from 2000-2009. Because no one knows if the world's species number 3 million or 30 million, it is impossible to guess how many known species—let alone unknown—may have vanished recently. Species in tropical forests and the world's oceans are notoriously under-surveyed leaving gaping holes where species can vanish taking all of their secrets—even knowledge of their existence—with them.


Kihansi spray toad goes extinct in the wild
(11/04/2009) This year's IUCN Red List has updated its assessment of the Kihansi spray toad, moving the species from Critically Endangered to Extinct in the Wild. With that another amphibian species has been lost to a combination of habitat loss and the devastating amphibian disease, the chytrid fungus. The Kihansi spray toad Nectophrynoides asperginis, which still survives in a number of zoos in the United States, had lived on just two hectares along the Kihansi gorge in Tanzania. The toad was specially adapted to the spray region of the Kihansi waterfall, which kept its small environment at a constant temperature and humidity.




CITATION:
Jeremy Hance
mongabay.com (May 26, 2010).

World's 'number one frog' faces extinction from New Zealand government .

http://news.mongabay.com/2010/0526-hance_archeys.html