Chapter 2 - Ecosystems

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Unit A - Organisms and Environments

Chapter 2 - Ecosystems

Examine the spectrum of habitats that are found throughout the planet. Discover how plants and animals interact in their environments.

How Do Humans and Plants Interact in Tidal Wetlands?

Young Naturalist Awards Essay

How Do Humans and Plants Interact in Tidal Wetlands?

How is cordgrass able to survive the high salinity of a marsh when other plants can't? An amazing adaptation that lets it secrete excess salt, as this ninth-grader from Virginia discovered.

Spectrum of Habitats

Curriculum Materials

Spectrum of Habitats

Did you know that the world's deserts keep expanding each year? Or that islands have the highest animal extinction rate—75 percent? Take a closer look at the major habitats found on Earth.

Exploring a Woodlot's Ecosystem

Young Naturalist Awards Essay

Exploring a Woodlot's Ecosystem

Chances are you've heard the saying "There's no such thing as a free lunch." But did you know that it's one of fundamental laws of ecology? Explore all four with this tenth-grader from Wisconsin.

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Science Bulletin

Surveying Vietnam

In recent years, scientists from around the world have turned to Vietnam in their search for new plant and animal species. Vietnam harbors an astonishing range of habitats, from rain forests and dry forests to mangroves and coral reefs. Scientific expeditions and surveys have discovered an amazing range of biodiversity. But even as this biodiversity is being revealed, it is coming under threat from development and human activity. Scientists now are racing to accomplish their studies in an effort to keep Vietnam's biological wealth from disappearing entirely.

Aspen: A Keystone Species

Young Naturalist Awards Essay

Aspen: A Keystone Species

By keeping a nature journal, this 16-year-old from Colorado quickly saw how aspens support and sustain biodiversity. Learn more about the most widely distributed tree species in North America.

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