The student will investigate and understand that ecosystems, communities, populations, and organisms are dynamic and change over time (daily, seasonal, and long term). Key concepts include
a) phototropism, hibernation, and dormancy;
b) factors that increase or decrease population size; and
c) eutrophication, climate changes, and catastrophic disturbances.
Overview / Key Concepts
may exist as members of a population; populations interact with other
populations in a community; and communities together with the physical
environment form ecosystems.
• Changes that affect organisms over time may be daily, seasonal, or long-term.
• Plants may respond to light by growing toward it or away from it, a behavior known as phototropism.
• Animals may respond to cold conditions with a period of lowered metabolism, a behavior know as hibernation.
• Organisms may respond to adverse conditions with a period of lowered or suspended metabolism, a behavior known as dormancy.
|• A variety of
environmental factors may cause the size of a population to increase
or decrease. (This requires students to brainstorm examples of factors and
predict the possible effects.)
• Large-scale changes may affect entire communities and ecosystems.
• Such large-scale changes include the addition of excess nutrients to the system (eutrophication), which alters environmental balance; dramatic changes in climate; and catastrophic events, such as fire, drought, flood, and earthquakes.
Knowledge & Skills
|• relate the responses of
organisms to daily, seasonal, or long-term events.
• differentiate between ecosystems, communities, populations, and organisms.
• predict the effect of climate change on ecosystems, communities, populations, and organisms.
|• compare and contrast the
factors that increase or decrease population size.
predict the effect of large scale changes on ecosystems, communities,
populations, and organisms.