BIOL 200 Study Guide - Abalone, Biomagnification, Dinoflagellate
Document Summary
Midterm exam friday oct 3rd covers to the end of this topic. Learning outcomes: predict the consequences of food web perturbation, describe the implications of biomagnifications, assess the efficiency of energy transfer among different food sources. Reminders: food web assignment #2 due wednesday oct 1st. When populations of predatory species increase their demand for prey also increases. Recent increases in sea otter populations have resulted in a decline in sea urchins. Urchins forage on kelp, when sea otter numbers were lower the urchins in effect clear-cut the kelp forests which had significant impacts on other organisms in the community. Switch to a new source or die out. Question: as the human population grows, we need more food resources. As a result we are in competition with other species. For years fishermen would shoot killer whales and seals whenever they were spotted. Food consists not only of nutrients and energy rich molecules but also contains other compounds:
