Pls answer Use the canopy figures 4, 5 and 6 to answer the following questions:
a. Which tree species disappeared between 20 and 50 years after the field was abandoned?
b. What tree species appeared between 20 and 50 years after the field was abandoned?

**Think about the types of trees growing after 20 years in the understory. Are they tall or short species? Now think about the types of trees growing after 50 years. Are they tall or short species?

**Based on your answers to questions 3 and 4, what caused the change in the air and soil temperature between 20 and 50 years after the field was abandoned?

*Did certain species of trees decrease or disappear during succession? Discuss what factors and conditions may be related to these changes.