Category Archives: habitat loss

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.

01/26/10

Yasuni National Park, Ecuador: An Amphibian Eden

Yasuni National Park

Yasuni National Park, courtesy UTNE.com

Scientists have recently identified Yasuni National Park in Ecuador as one of the most biologically diverse places in South America, and perhaps on earth. As Shawn McCracken of Texas State University—San Marcos, recently said, “The 150 amphibian species throughout Yasuni is a world record for an area this size. There are more species of frogs and toads within Yasuni than are native to the United States and Canada combined.”

Unfortunately this Eden sits on oil reserves and is threatened by proposed oil development projects. McCracken and other scientists from Ecuador, the United States, and Europe have proposed a moratorium on new oil exploration until the effects of such projects can be explored.

Reading about this, we couldn’t help but think about the movie Avatar and the attempted destruction of the planet Pandora to mine unobtanium. Unfortunately, we humans aren’t as wise as the Na’vi—yet. Let’s hope that Ecuador will preserve this incredible pocket of biodiversity and not be so shortsighted as to destroy parts of it for oil.

Here is more information from Save the Frogs and the Environmental News Service.

09/18/09

A Place in the Choir for the Houston Toad

Maybe it’s because my choir rehearsals begin tonight, but I was intrigued by this story about the Houston Toad—the star soprano in the frog chorus. Here’s some information about the toad from The Dallas Morning News:

In the nightly pondside chorus, the Houston toad sings soprano. Its clear, high cry, lasting as long as 14 seconds, trills above the basso profundo grunts of the less gifted. It’s a remarkable performance. But to hear it, you’ll need to travel as far as Bastrop County.

Unfortunately habitat loss and drought have driven this toad to the brink of extinction. It hasn’t been seen in the Houston area for 50 years, and is now found only in a small area of Bastrop County, Texas. In an effort to increase the numbers of the endangered toad, 5000 baby toads, raised from eggs at a Houston Zoo nursery, were released into the wild. Texas State University, the Houston Zoo, Texas Parks and Wildlife, the Environmental Defense Fund, and private landowners are all working together save the Houston Toad.

I found a YouTube video so that I could hear the Houston toad sing. It’s ten minutes long, but I found it so inspiring to see how people are working to save this toad. It ends with a hopeful love scene—you’ll have to watch it to see what I mean!