Extinction

Ancient Egyptian Art Opens Window on Mammal Extinctions

Publication: NBC News   Date: September 8, 2014   View Article

Images of lions, giraffes, wildebeests and other creatures depicted on ancient Egyptian artifacts have helped scientists create a 6,000-year record of local mammal extinctions, according to a new study. Several of the extinction episodes correlate with known periods of drought and rapid human population growth.

While the correlations aren’t proof that drought and population pressures caused the animals to disappear, “it is an interesting pattern,” Justin Yeakel, a biologist at the Santa Fe Institute in New Mexico, told NBC News. What’s more, he added, “as the communities lost species, the system became more unstable and this was largely due to the loss of redundancy in the system.”

In other words, when an herbivore went locally extinct several thousand years ago, it wasn’t a big deal because there were plenty of other herbivores around for the carnivores to eat. Now, there are so few of any mammals left, that the loss of any one species has a larger impact on those that remain.

Back From the Dead: Why De-Extinction May Save Humanity

Publication: NBC News   Date: July 24, 2014   View Article

If current trends continue, elephants, giraffes, and zebras could go extinct in the not-too-distant future.

Rodents teeming with parasites that carry black plague would fill the void, suggests ongoing research in Africa. If so, the threat to human health could prompt the tantalizingly feasible solution of de-extinction — that is, resurrecting the big animals and releasing them back into the wild.

De-extinction for conservation purposes is a “matter of when, not if,” said Philip Seddon, a zoologist at the University of Otaga in New Zealand. “We need to think very hard about which are the good candidate species.”

Frogs Get Their Shots: Vaccination May Curb Lethal Fungus

Publication: NBC News   Date: July 9, 2014   View Article

Around the world, the rapid spread of a pathogenic fungus has sent frogs and other amphibians hopping toward extinction. Hope for their survival may come in the form of vaccination programs similar to those that protect humans from contagious diseases, according to a new study.

No, this doesn’t mean that newborn tadpoles will be paying a visit to the veterinarian for a round of shots, or that conservationists with mini-syringes will be mucking through rain forests in search of frogs. But the reality isn’t all that different.

Hundreds of amphibians already have been removed from habitats contaminated with the fungus Batrachochytrium dendrobatidis, which causes chytridiomycosis — the fungal disease implicated in the global amphibian decline. One route is to vaccinate these captive-bred amphibians, explained Jason Rohr, an ecologist at the University of South Florida and the study’s senior author.

Social Media Could Help Save Species on the Verge of Extinction

Publication: NBC News   Date: May 29, 2014   View Article

Dodo, meet Instagram.

Scientists think that the same technology that brought us the selfie could be used to help save some of the thousands of species tottering on the brink of extinction around the world.

While an untold number of butt selfies and pictures of food are posted on social networks daily, people are also snapping images of birds, flowers, and other creatures that can help researchers who keep a close eye on flora and fauna at the tipping point.

‘Uncomfortable’ climates to devastate cities within a decade, study says

Publication: NBC News   Date: October 9, 2013   View Article

The world is hurtling toward a stark future where the web of life unravels, human cultures are uprooted, and millions of species go extinct, according to a new study. This doomsday scenario isn’t far off, either: It may start within a decade in parts of Indonesia, and begin playing out over most of the world — including cities across the United States — by mid-century.

What’s more, even a serious effort to stabilize spiraling greenhouse gas emissions will only stave off these changes until around 2069, notes the study from the University of Hawaii, Manoa, published online Wednesday in the journal Nature. The authors warn that the time is now to prepare for a world where even the coldest of years will be warmer than the hottest years of the past century and a half.

Turtles, snakes and lizards head toward extinction

Publication: NBC News   Date: February 15, 2013   View Article

Nearly one fifth of all reptiles — turtles, snakes, lizards and crocodiles — are on a slippery slope toward extinction due to loss of habitat, overharvesting and other factors, a new report says.

The study is the first of its kind to summarize the global conservation status of reptiles. More than 1,500 species were selected at random from around the world for conservation assessments in an effort to gain a representative sample.

Captive male frog coughs up babies

Publication: msnbc.com   Date: June 3, 2011   View Article

A captive male Darwin’s frog coughed up ten babies Thursday at a zoo in Santiago, Chile, a milestone in a project to save the amphibians from extinction.

The vulnerable species is one of two members of the only genus on Earth that rears its young inside of its vocal sac, a job taken on by the males.

© 2008-2010 Collected Writings By John Roach