Based on the data from the two studies and your knowledge of stability and change in ecosystems, develop a management plan for restoring plant biodiversity in a 1-km2 longleaf pine ecosystem. In your plan, describe two steps that should be taken, and explain how each step will affect plant biodiversity. Use evidence from the information provided on longleaf pine ecosystems to support your answer.

Control variable- changedependant variable- stays the samechanging- food itemsdependant- presences of proteins

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.