My Work
Nitrogen and phosphorus are essential for plants and algae to grow. On page 5, the graphs suggest that increasing the amount of nutrients leads to more algae growth. Algae populations are important to aquatic ecosystems because they are the foundation of the food web and play key roles in the nitrogen, phosphorus, and carbon cycles. But what happens if the amount of nutrients in the water continues to increase?
| Keyboard Shortcut | Action |
|---|---|
| Space | Pause/Play video playback |
| Enter | Pause/Play video playback |
| m | Mute/Unmute video volume |
| Up and Down arrows | Increase and decrease volume by 10% |
| Right and Left arrows | Seek forward or backward by 5 seconds |
| 0-9 | Fast seek to x% of the video. |
| f | Enter or exit fullscreen. (Note: To exit fullscreen in flash press the Esc key. |
| c | Press c to toggle captions on or off |
The excess nutrients contaminating a body of water cause nutrient pollution. When the concentration of nutrients in any body of water keeps increasing, it leads to a process called eutrophication, as shown in video. While this process occurs naturally over time, human activity that increases the amount of nutrient pollution entering the ecosystem can significantly speed up the process.
Click Arrange It to show what you know about the order of events that lead to eutrophication.
Drag cards to the appropriate spaces in the diagram.