Unit D: Population and Community Dynamics

A study on bird feeders and beak sizes shows how an everyday human activity can affect the evolution of another species.

When a species ends up outside of its natural zone, the consequences on other species, ecosystems and human industries can be severe. Climate change and human activities can introduce species into new zones.

How do plants use scents? Learn how some plants use chemical signals to send messages to animals or other plants.

How do different populations adapt to their environment? Let’s explore this concept through guppy speciation.

Bees are important for agriculture. But bee populations face threats. This resource looks at Colony Collapse Disorder, herbicides & pesticides, and more.

When fertilizers from agriculture get into lakes and rivers, big problems can result for aquatic ecosystems, food chains & webs!

Beavers are a Canadian symbol. But in South America, they’re considered an invasive species.

Wind power is a growing source of electricity generation. But wind projects often affect local wildlife populations, and researchers are using environmental monitoring techniques to alleviate some of these impacts.