2.1. Divisions of Bioturbation

Try these first

1. 1.

   Define bioturbation.

   Hint

   Think about how creatures interact with sediment.

2. 2.

   Give an example of an organism that can cause bioturbation.

   Hint

   Consider creatures that live in sediment.

3. 3.

   What is bioturbation?

   • A form of pollution
   • The mixing of sediments by organisms
   • A water purification method

   Hint

   Think about how creatures move through soils or sediments.

4. 4.

   True or False: Advection only refers to the movement of sediments, not water.

   • True
   • False

   Hint

   Consider what carries sediment in aquatic environments.

5. 5.

   Consider a river that undergoes flooding causing significant sediment transport. Discuss how bioturbation interplay with this flooding event. What might be the outcomes on nutrient delivery?

   Hint

   Consider the roles of sediment movement and burrowing organisms.

6. 6.

   Evaluate a situation where excessive resuspension occurs in a shallow lake due to recreational activities. Discuss potential ecological impacts.

   Hint

   Think about how sediment disturbances affect lake environments.