Give examples of communities you would expect to display each. List four ways in which a site undergoing succession is modified over time. List three major environmental problems currently facing earth's human population. List three major environmental problems that have arisen as a result of our species solving short term problems. List three positive effects of fire.
Predators strengthen prey.
Suppose your back yard ended in a ripatrian strip along a creek. Using LA as an example, give three specific examples of the way an urban area is totally dependent on both exploited-natural and natural ecosystems. Choose an organism and give an example of a physical and a physiological barrier to your organism. Name a different organism for which the barriers you listed would not be barriers. What type of fire was most common in local forests 200 years ago.