Madagascar's lemurs cling to survival

The famous lemurs of Madagascar face such severe threats to their survival that none of them may be left in the wild within 25 years.

Deforestation and hunting in Madagascar are taking a devastating toll on lemurs

That stark warning comes from one of the world's leading specialists in the iconic animals.

Deforestation and hunting are taking an increasing toll, according to Professor Jonah Ratsimbazafy, director of GERP, a centre for primate research in Madagascar.

"My heart is broken," he told the BBC, "because the situation is getting worse as more forests disappear every year. That means the lemurs are in more and more trouble."

So far 106 species of lemur have been identified and nearly all of them are judged to be at risk of extinction, many of them critically endangered.

The habitats they depend on - mostly a variety of different kinds of forest - only exist in Madagascar.

"Just as fish cannot survive without water, lemurs cannot survive without forest, but less than 10% of the original Madagascar forest is left," said Prof Ratsimbazafy, who is also a co-vice chair of the Madagascar primates section of the International Union for the Conservation of Nature (IUCN).

"I would believe that within the next 25 years, if the speed of the deforestation is still the same, there would be no forest left, and that means no lemurs left in this island."

A form of slash-and-burn agriculture known as 'tavi' sees trees felled and undergrowth scorched

The pressure to clear the forests comes from a rapidly growing but extremely poor population seeking to open up new farmland. At least 92% of people in Madagascar live on less than the equivalent of $2 a day.

A form of slash-and-burn agriculture known as "tavi" sees trees felled and undergrowth scorched to make way for fields of rice and other crops.

Video of one recent forest clearance shows an apocalyptic scene of an entire hillside of charred stumps and smouldering vegetation.

In one supposedly protected area I visited in eastern Madagascar, a sign announcing a prohibition on tree felling stood ignored amid new plantations of banana palms and maize.

Conservationists have long argued that slash-and-burn farming is needlessly damaging, leaving the soil unproductive after a few years, and that more intensive forms of cultivation would allow more forests to be left standing.

The government of Madagascar has recently confirmed that as much as 10% of the country is now earmarked in some way for wildlife - from national parks to what are called protected areas - but the rules are often not enforced at a local level.

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Earth 'entering new extinction phase' - US study

The Earth has entered a new period of extinction, a study by three US universities has concluded, and humans could be among the first casualties.

Climate change and deforestation are among the reasons we may be facing an extinction event

The report, led by the universities of Stanford, Princeton and Berkeley, said vertebrates were disappearing at a rate 114 times faster than normal.

The findings echo those in a report published by Duke University last year.

One of the new study's authors said: "We are now entering the sixth great mass extinction event."

The last such event was 65 million years ago, when dinosaurs were wiped out, in all likelihood by a large meteor hitting Earth.

"If it is allowed to continue, life would take many millions of years to recover and our species itself would likely disappear early on," said the lead author, Gerardo Ceballos.

Pollination by bees could disappear within three generations, the report warns

The scientists looked at historic rates of extinction for vertebrates - animals with backbones - by assessing fossil records.

They found that the current extinction rate was more than 100 times higher than in periods when Earth was not going through a mass extinction event.

Since 1900, the report says, more than 400 more vertebrates had disappeared.

Such a loss would normally be seen over a period of up to 10,000 years, the scientists say.

The study - published in the Science Advances journal - cites causes such as climate change, pollution and deforestation.

Given the knock-on effect of ecosystems being destroyed, the report says benefits such as pollination by bees could be lost within three human generations.

Extinction may be more gradual than when the dinosaurs died, the report says

Stanford University professor Paul Ehrlich said: "There are examples of species all over the world that are essentially the walking dead.

"We are sawing off the limb that we are sitting on."

The International Union for Conservation of Nature (IUCN) says at least 50 animals move closer to extinction every year.

Around 41% of all amphibians and 25% of mammals are threatened with extinction, it says.

Most at risk: the lemur

According to the IUCN, the lemur faces a real struggle to avoid extinction in the wild in the coming years.

The group says that 94% of all lemurs are under threat, with more than a fifth of all lemur species classed as "critically endangered".

As well as seeing their habitat in Madagascar destroyed by illegal logging, lemurs are also regularly hunted for their meat, the IUCN says.

What were the five mass extinction events?

Last year, a report by Stuart Pimm, a biologist and extinction expert at Duke University in North Carolina, also warned mankind was entering a sixth mass extinction event.

But Mr Pimm's report said the current rate of extinction was more than 1,000 times faster than in the past, not 114, as the new report claims.

The new report's authors said it was still possible to avoid a "dramatic decay of biodiversity" through intensive conservation, but that rapid action was needed.

From BBC News