What Are Ecosystems? Crash Course Geography #15

Today we’re going to take a closer look at ecosystems -- which are communities of living organisms in an area interacting with their environment -- and how this relationship between the amount of energy a place receives and the movement of nutrients is what makes the incredible diversity of life possible. We’ll also take a look at the patterns we see in the main global biomes, show you why some biomes (like tropical rainforests) are so productive, and discuss an agricultural practice some farmers have employed to help preserve their local ecosystems. Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: Download here for Android Devices: Crash Course is on Patreon! You can support us directly by signing up at Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: