A n ecosytem consists of a community of living things interacting with each other and with the physical environment. Observing, Communicating, Comparing, Organizing P repare and label a chart illustrating the living things in a particular environment. Adjust the balance as necessary over time. F ood chains and food webs indicate the eating patterns of the members of an ecosystem. Scavengers are animals that eat dead plant and animal tissue.
Parasites are animals or plants that feed off other animals or plants called hosts.
Knowledge of food chains and webs is used in biological control of pests. 6-9 F ood chains and food webs indicate the flow of energy that maintains an ecosystem. L ong-term population changes occur as climates change. S uccession is a process in which some ecosystems change over time. As changes occur in physical features of the system, new species move in, population sizes change, and so forth.