01/20/11

Rediscovering Haiti's Lost Frogs

Haiti recently marked the anniversary of the January 12, 2010, earthquake that devastated the country, killing over 300,000 people, and leaving almost a million people homeless.

Recently scientists from Conservation International (CI) and the Amphibian Specialist Group (ASG) of IUCN reported a bit of news they hope might become a source of pride and hope for the country’s environmental future: the surprising re-discovery of six species of  frogs in the country’s severely degraded tropical forests, species that had been lost to science for nearly two decades.

Large-scale deforestation has left the country with less than two-percent of its original forest cover and has degraded most of the fresh water ecosystems. Yet Haitians depend on the cloud forests of the southwest mountains as two of the last remaining pockets of environmental health and natural wealth in Haiti.

This expedition was part of Conservation International’s global Search for Lost Frogs campaign, in which CI’s Amphibian Conservation Specialist Dr. Robin Moore, in partnership with Dr. Blair Hedges of Pennsylvania State University, searched for the La Selle Grass frog (E. glanduliferoides), which had not been seen in more than 25 years. They also hoped to assess the status of Haiti’s 48 other native species of amphibians.

The scientists did not find the La Selle Grass frog, but to their surprise, they rediscovered several other remarkable frog species, most of which haven’t been seen since 1991. As Dr. Moore says, “We went in looking for one missing species and found a treasure trove of others. That, to me, represents a welcome dose of resilience and hope for the people and wildlife of Haiti.”

Dr. Moore says that a common assumption about Haiti is that there isn’t anything left to save. Yet this is not true. According to Moore, there are biologically rich pockets intact, despite tremendous environmental pressures. Haiti now has the opportunity to design their reconstruction plans around these pockets, and to protect them, so that these natural areas can more effectively act as buffers to climate change and natural disasters. However, there is little time to waste: 92 percent of Haiti’s amphibian populations are listed as threatened and are in danger of disappearing.

“The biodiversity of Haiti, including its frogs, is approaching a mass extinction event caused by massive and nearly complete deforestation. Unless the global community comes up with a solution soon, we will lose many unique species forever,” said Dr. Hedges.

Amid the backdrop of Haiti’s struggle to rebuild, Moore added some important context:

The devastation that the people of Haiti are still coping with is almost unimaginable. I have never seen anything like it. Clearly, the health of Haiti’s frogs is not anyone’s primary concern here. However, the ecosystems these frogs inhabit, and their ability to support life, is critically important to the long-term well-being of Haiti’s people, who depend on healthy forests for their livelihoods, food security, and fresh water. Amphibians are what we call barometer species of our planet’s health. They’re like the canaries in the coal mine. As they disappear, so too do the natural resources people depend upon to survive.

Here are a few of the rediscovered frogs:

Hispaniolan Ventriloquial Frog (Eleutherodactylus dolomedes). This frog is named after its call that the frog projects like a ventriloquist. Its unusual call consists of a rapid seven-note series of chirps, with the initial four notes rising slowly in pitch before plateauing; the call is released in widely-spaced intervals, often minutes apart. Prior to this expedition, the species was only known from a few individuals.

Mozart’s Frog (E. amadeus). Called Mozart’s frog because when Dr. Hedges, who discovered the species, made an audiospectrogram of the call, it coincidentally resembled musical notes. Its call is a four-note muffled whistle at night; usually given as a shorter two-note call at dawn and dusk.

La Hotte Glanded Frog (E. glandulifer). This frog could be called Old Blue Eyes: its most distinctive feature are its striking blue sapphire-colored eyes – a highly unusual trait among amphibians.

La Hotte Glanded Frog, Eleutherodactylus glandulifer. Copyright Claudio Contreras /iLCP.

Macaya Breast-spot frog. (E. thorectes). Approximately the size of a grape, this is one of the smallest frogs in the world. In Haiti, this species has a very restricted range, occurring only on the peaks of Formon and Macaya at high elevations on the Massif de la Hotte.

Juvenile Macaya breast-spot landfrog, E. thorectes. Photo copyright Robin Moore/iLCP

Hispaniolan Crowned Frog. This species was named after a row of protuberances that resemble a crown on the back of its head. Prior to this expedition, the species was known from less than 10 individuals, and is likely to be extremely rare. It is an arboreal species, occurring in high-elevation cloud forest. Males call from bromeliads or orchids, which they seem to require for reproduction.

Macaya Burrowing Frog. Haiti is now the only place where two burrowing frogs are known to share the same habitat. This species has big jet black eyes and bright orange flashes on the legs. Males call from shallow, underground chambers and eggs are also laid underground, where they hatch directly into froglets.

For more information, please visit Conservation International’s site, which includes more photos, recordings of the frogs’ calls, and a video.

12/4/10

Burned Forests Threaten the Frogs of Madagascar – Guest Post, Franco Andreone

We are so pleased that Franco Andreone, Associate Curator of Zoology, Responsible for Herpetological and Ichthyological Collections, Museo Regionale di Scienze Naturali, Torino, Italy, offered to write a guest post for Frogs Are Green about his recent visit to Madagascar and what he encountered there—the possible extinction of  frogs species due to the destruction of its forests.

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In October, I visited the Ankaratra, a massif next to Madagascar’s capital Antananarivo, for a quick trip in an attempt to see two of the most threatened (maybe “the most threatened”) frog species of Madagascar: Boophis williamsii and Mantidactylus pauliani.

They are both CR species and live in an area that is not yet protected and has been heavily altered. For some time, on behalf of the Amphibian Specialist Group (ASG), we have advocated the need for protecting this area. To this end, a project has been set up with the help of Conservation International and the collaboration of many colleagues, with the aim of securing the area, which is also very important because it is a draining basin for potable water for the city of Ambatolampy. Through the ASG it was also possible to get a MacArthur grant that will be helpful for any further action.

Some people, notably from the Langaha Association and Madagasikara Voakajy, have begun work on the species, along with other herp species (i.e. Furcifer campani); they have collected data on both B. williamsii and M. pauliani. The two species appear VERY localised, with no more than three spots where they have been found. M. pauliani appeared a little bit more common, but we observed less than ten B. williamsii individuals.

I was already concerned about the threats to these species and their habitat. The bad news is that during the rapid survey we did (a few hours visit), we noticed that almost ALL the exotic forest was burned. This forest, composed mainly of pines, assured a certain naturalness to the area, and prevented erosion. Now, following the voluntary burning events of last July, almost all the forest has been “transformed” into charcoal. This will have serious and terrible consequences for the human populations, especially for the availability of drinking water. Most likely, during the next rainy season there will be accelerated erosion and the water will become heavily polluted. Clearly the amphibian populations will be tragically affected as well. Although one of the sites is still within a small parcel of “natural” forest, the burned trees are all around, and at the other sites the fire event has destroyed the small residual (ferns, grass) vegetation that likely assured the survival of the species.

During the visit we found some B. williamsii, but we really wonder what the effect of the next rains will be. The tadpoles need clear and clean water, and if the water is polluted by erosion, they will most likely die.

Furthermore, there really is a risk that the species will be driven to extinction within a short time.

Boophis williamsii courtesy of Franco Andreone

Boophis williamsii tadpole courtesy of Franco Andreone

Habitat Ankaratra courtesy of Franco Andreone

Mantidactylus pauliani courtesy of Franco Andreone

For more information, please visit my website:  www.francoandreone.it

06/28/10

Cape Town’s secretive inhabitant and pilot conservation species – the Western Leopard Toad

Written by Guest Blogger: Mark Day

Dusk ascends to cover the suburb of Bergvliet under a blanket of darkness. It brings with it the chill of a Wintery August night in Cape Town, South Africa, as a nippy breeze sweeps across the small urban wetland of Die Oog (an Afrikaans word meaning “The Eye”).

This man-made depression was originally dug out some 284 years ago to provide water for livestock on the neighbouring farm of Dreyersdal. In more recent years, however, Die Oog has come to serve a much greater purpose, as a pivotal breeding site for one of Cape Town’s most threatened amphibians, the western leopard toad Ameitophrynus pantherinus.

IUCN listed Amietophrynus pantherinus in Noordhoek - Photo by Maria Wagener of Fishhoek

As little as six years ago it was thought that only several such breeding sites remained in existence, for a species which has suffered massive population declines as a consequence of numerous threats including urban expansion, habitat destruction and population decimation through road kills. Today, conservationists and scientists with the aid of concerned volunteers and the public have listed a total of 52 breeding sites within the Cape Town range of the species. Further eastwards, some 150 kilometres away from southern Cape Town, a largely unprotected population comprising seven breeding sites exists.

Unlike most frogs which remain at water courses throughout the year, toads live in what’s termed ‘foraging areas’ where they lay dormant by day and hunt by night—with an exception for August month and there about when they migrate to and from local aquatic environments to breed. Presently, the majority of these foraging and breeding areas fall under urban suburbia, guaranteeing a window of constant interaction between these toads and the unknowing dangers their human neighbours pose.

Despite current conservation action and volunteer efforts to protect the Cape Town populations, census data from the 2009 breeding season only generated a recorded 1125 live migrants and 258 dead. Great strides have been achieved in recent years through a consistent increase in awareness of the plight of the species and in the recruitment of volunteers. The fate of the species is however uncertain—unless the citizens residing in these areas value their endemic and endangered leopard toad, there will merely remain stories of its once enigmatic nature and quiet existence.

For further details on the species, join the group on Facebook, The Endangered Western Leopard Toad or visit the website, www.leopardtoad.co.za.

Mark Day
Coordinator: Awareness, Volunteer & Census Operations
Western Leopard Toad Conservation Committee

Email: leopardtoad@gmail.com

Websites: www.leopardtoad.co.za /  www.toadnuts.co.za

Facebook: The Endangered Western Leopard Toad

02/9/10

Giant Salamander: Earth's Largest Amphibian

We confess to paying most of our attention in our posts on Frogs Are Green to the stars of the amphibian world—frogs—and not so much on other amphibians. So to make up for that, we’d like to introduce you to Earth’s largest amphibian—the giant salamander of China and Japan.

BB-Japanese-Giant-Salamander

This creature is considered a living fossil because it hasn’t changed much in 30 million years. To put things in perspective, 30 million years ago our ancestors were little primates hanging from trees. It would be millions of years before some of these primates descended from the trees, and millions of years after that before the first humans.

The giant salamander lives in mountain streams and lakes and can grow up to 6 feet long. It has four digits on its front legs and five digits on its back legs and is covered with a slimy protective mucous. It spends most of its time walking on the river bottom, though it can swim quickly. On land, its small legs won’t carry it and it must drag itself along.

Like many amphibians, the giant salamander is endangered due to habitat loss. Construction of dams converts  their free-flowing stream habitats into standing water or dries them up completely. They are also vulnerable to water pollution from mining activity and farming throughout their range.

Other threats to their habitat includes deforestation around the streams. This exacerbates soil erosion and causes increased runoff and siltation of the streams, reducing water quality and making it difficult for the salamanders to get enough oxygen through their skin. In addition, the giant salamander  is considered a delicacy and is also used in traditional Chinese medicine.*

On the BBC News site, Dr. Takeyoshi Tochimoto, director of the Hanzaki Institute near Hyogo in western Japan, gives a guided tour of this unusual creature.  (“Hanzaki” is the local name for the giant salamander.) After watching this video, however, I have decided not to hug a giant salamander if I ever meet one.  They have a very large mouth and several hundred small teeth on the top and bottom and can bite if angry, causing serious injury. Generally, however, this is a shy and secretive animal and is unfortunately relatively easy to catch.

*Information from BBC Wildlife Finder. Image above courtesy of National Geographic.