Young scholars will exam the different perspectives on why the gray wolf was reintroduced into many western states during the 1980s, the success of the reintroduction, and the benefits and problems from the recovery of the gray wolf...

Learn what happens to different populations of organisms as their ecosystem changes. Design your own experiment and make your own guesses with what the result will be with this virtual ecosystem. Also experiment with producer/consumer...

Find a large collection of internet resources organized around ecosystems. Links to places to go, people to see, things to do, teacher resources, and bibliographies.

This unit on ecosystem dynamics and biodiversity begins with students reading headlines that claim that the future of orangutans is in peril and that the purchasing of chocolate may be the cause. Students launch a scientific...

Students explore the effects that ecosystem disruptions can have on animal populations. They learn about the disruptions that have driven three species-the Madagascar fish eagle, the Iberian lynx, and the rowi kiwi, to the brink of...

In this lesson learners analyze videos to make observations about species, populations, and communities of organisms and discuss their symbiotic relationships. Then they create a hypothetical marine ecosystem and describe the adaptive,...

Did you ever want to be a hawk? In this virtual ecosystem, students will take on the role of a hawk and try to catch rabbits on a snowy field. Students will see which rabbits have adaptations that allow them to blend into the environment...

After learning about the diversity of wildlife in the Gulf of Mexico, students focus on birds and their patterns of behavior. They then how an oil spill might affect migrating birds, and possible ways to help them in the event of an oil...

A unit for students to look at the economic opportunities associated with a river. Students will explore the Grand River Revitalization & Restoration Project. In this unit, they will also learn about two species impacted by the...

"Changing the Ecosystem: Q & A" is a one page, nonfiction, reading passage about how the loss of the prairie to farming and population growth impacts the ecosystem. It is followed by questions which require students to provide...

Population in areas is most often determined by environmental factors. This video and the test will help ensure understanding of the trends of population growth with scientific evidence.

Students learn about how climate change is affecting the Arctic ecosystem, and then investigate how this change is impacting polar bear populations. Students analyze maps of Arctic sea ice, temperature graphs, and polar bear population...

What happens to a population when the environment changes? Students remove a dam that divides an ecosystem to illustrate the effects of environmental changes. Students observe and collect data as the grass and then the rabbit populations...

Learn about the effects of alien species on native environments and explore biologists' use of capture/recapture statistics and analysis of sampling techniques by estimating the population size of a tagged species.

In this lesson, students will learn about the different levels in the hierarchy of ecology and explain the relationships: organism, population, community, ecosystem, biome, and biosphere. They will also discover why different regions...

Students will conduct a field investigation to learn about the environment. They will observe biotic and abiotic factors of an ecosystem. Students can use the CBL 2 and a temperature probe to collect data and a graphing calculator to...

Students learn about Abiotic and Biotic Factors and how they affect the ecosystem in which an animal might live in.

Explore biotic and abiotic factors that can influence the growth of populations of organisms in this interactive tutorial.

Read and understand the concept of ecological population counts and sizes. Hover the mouse over questions to reveal the answers as you sharpen your skills.

The American Institute of Biological Sciences offers this article by Niles Eldredge, evolutionary theorist and curator at the American Museum of Natural History. Eldredge begins with Darwin's theories and summarizes subsequent thought,...

A paper from the Population Connection that outlines the consequences to the environment if humans continue on the path of overpopulation.

Students learn about population density within environments and ecosystems. They determine the density of a population and think about why population density and distribution information is useful to engineers for city planning and...

A collection of video lectures introducing beginning biology students to the principles of evolution, ecology, and behavior. The course was taught three times a week for a semester at Yale University. The course discusses concepts of...

Learn why people live in places with lots of people.