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FROGS ARE GREEN!

For over 200 million years, ponds, marshes, grasslands, and rain forests have come alive with the calls of frogs. Yet these remarkable and colorful animals are declining at such a rapid rate that they are being called the Earth’s next dinosaurs. According to the IUCN Red List of Threatened Species, a third of the world’s amphibian species are threatened with extinction. To read more, click here!

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Archive for the ‘Earth Day’ Category

Earth Day 2011: What Green Can Do for You

Thursday, April 14th, 2011

While you may read lots of Earth Day posts this spring that talk about about ways you can help the Earth, we’d like to remind you about the ways that enjoying the Earth can help you.

Most of us know that a walk in a garden or a hike in the woods makes us feel better. Until recently, however, there has been little scientific evidence for the psychological benefits of enjoying nature. But recent studies that have shown that the calming effect of being in nature can reduce stress and blood pressure, and even cholesterol levels.

photo by M.J. Rhodes

While exercise of all kinds is important for good health, studies have shown that a walk outside in nature (as opposed to a walk in a mall) decreases levels of depression; people said they felt less tense and over 90 percent reported increased self-esteem after walking outside. “Green exercise” is beginning to be considered a clinically valid treatment option for people experiencing mental distress.

Another study by psychologists at Essex University, in the United Kingdom, has shown that just a small dose of nature every day, or several times a week, can definitely improve people’s self-esteem, lift their mood, and reduce mental health stresses. Even five minutes of “green exercise” produced measurable results in the study’s participants.

What Green Can Do for Kids

Dr. Frances Kuo, director of the Landscape and Human Health Laboratory at the University of Illinois at Urbana-Champaign, has done numerous studies on the effects of nature on kids. In one study involving parents of children diagnosed with ADHD, Dr. Kuo found a significant relationship between the parents’ ratings of their children’s symptoms, and the play setting — in a green play environment, the children were able to function better.

Journalist Richard Louv believes that children today are suffering from “nature deficit disorder.” His book Last Child In the Woods: Saving Our Children From Nature Deficit Disorder sparked a national debate and led to a movement to reconnect kids and nature.  He argues that today’s kids are suffering both physically and emotionally because they don’t spend enough time outside.

photo coutesy of mariposachamber.org

Sounds of Green

Recently my family and I have escaped from the city for some spring walks in public gardens, in the woods, and in a swamp or two. What we enjoyed most was the absence of human-made sounds—cars, pneumatic drills, loud music, TV—and the presence of natural sounds:  leaves rustling, geese honking, crows cawing. I even heard spring peepers and a wood frog. After a long and cold winter, when all of us in the northeast suffered from cabin fever, it calmed and refreshed us—definitely what the doctor ordered.

photo by M.J. Rhodes

As Dr. Mardie Townsend, an associate professor in the School of Health and Social Development at Deakin University in Melbourne, Australia, has said, “Having access to appealing natural environments encourages physical activity, which has obvious benefits. We gain life by looking at life.”

Further reading:

Walking in the Park Contributes to Happiness by Sue Cartledge

Mental Health Benefits from Nature by Sue Cartledge

Children and Nature Network

Spring to Life: From Tadpole to Frog

Wednesday, March 23rd, 2011

It’s finally Spring, and in our part of the world, we’re ecstatic. We’ve had a rough winter—we had snow and ice on our city streets every day for about 40 days in a row! The crocuses are blooming in my backyard, and outside the city, frogs are springing to life.

In a way, Spring is a good time to think about our “inner amphibian.” After all, mammals are descended from animals that moved from aquatic environments onto the land over three million years ago. As embryos, our heads in the early stages of development look remarkably similar to shark embryos—with gill arches and all. The metamorphosis of frogs is a process that’s not all that different from what all vertebrates go through, but the difference is that most of the development of birds, reptiles, and mammals—such as the growth of the lungs and limbs—takes place inside an egg or inside the mother instead.*

FROM EGG TO TADPOLE

A female frog first lays eggs underwater, sometimes hundreds of eggs, which form into a jelly-like clump called frogspawn, which floats on the water. Most of these eggs become food for other pond life, but some survive.

Tadpoles developing in eggs. © Dan L. Perlman/EcoLibrary.org

The tiny animal inside the egg grows for about a month, then hatches out of the egg. It looks like a small black fish and breathes underwater with feathery gills on each side of its head.

The tadpole’s tail begins to grow; it wiggles its tail to swim. Tadpoles are also called polliwogs. (The word “polliwog” is from Middle English polwygle. Pol means “head” and wiglen means to “to wiggle”). The tadpole eats algae and other plants that grow underwater.

Tadpole. Photo from Wikipedia.

FROM TADPOLE TO FROGLET

After several weeks, tadpoles begin their metamorphosis. Two tiny bumps appear near the tadpole’s tail—these will grow into back legs.

Two more bumps appear near the frog’s head—these will grow into front legs. Lungs begin to grow inside the tadpole’s body and the feathery gills disappear so that the tadpole will be able to breathe air.

The tadpole now has legs for hopping and walking, lungs for breathing air, but its long tail is awkward on land. Until the tail shrinks and is absorbed into its body, the froglet stays in or near the water.

Froglet with tail. Photo courtesy of www.scienceprojectlab.com

FROGLET TO FROG

When the tail is gone, the frog has completed its metamorphosis. The young frog will now feed on small insects, caught with their long, sticky tongues. It will eventually move away from the pond and find a safe place to grow.

This Spring, take some time to visit a nearby pond or swamp and see this process yourself. And check out the poster below that Susan designed for Earth Day, inspired by a photo by FROGS ARE GREEN photographer friend Joe Furman. All proceeds go to help our amphibian friends.

*I found this idea in Thomas Marent’s lovely and informative book, FROG.