3. [10 pts] Explain what algal or zooplankton succession is and what they are might be responding to. Describe a general succession pattern for one of the groups. How could habitat modification affect this? 4. [10 pts] Explain why the southeast has such an amazing diversity of freshwater organisms mussels, salamanders, crayfish and small fish. Why does the southeast have such a huge number of endangered and extinct species of freshwater organisms?