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13 148/31/15 Levels of Organization8/31/15
Starter: What is an ecosystem?
Practice: Notes
Application:
StemScopes Worksheet
Connection/Exit:Your parents are not home and you are required to make dinner for everyone. What steps would you take to make a spaghetti dinner, starting with the least important to the most important Then explain how leaving out one of those steps could change what you make.
Levels of Organization
EQ: Explain the levels of organization in living organisms
Date Lecture/ Activity/ Lab Page8/27 Syllabus /Notebook Guidelines 1-28/27 Periodic Table/ Formula 3-48/27 Language Scripts and Quickwrites 5-68/27 Lab Report/ Safety Equipment 7-88/27 Testing a hypothesis 9-10 8/28 Levels of Organization 11-12
Table of Contents
EcosystemsNotes
Practice
Populations vs. Communities• What is the difference between a
biological population and a biological community?
• A biological population is “a group of organisms of one species that interbreed and live in the same place at the same time,” while a biological community is “a group of interdependent organisms living and interacting with each other in the same habitat.”
Limiting Factors• Do populations often grow
exponentially?• What are limiting factors?
– Limiting factors are any factors (things) that affect an organism’s ability to survive in its environment. These factors affect population growth.
• Examples?– Availability of food and water,
predators, temperature, space/shelter, and disease
Density-Dependent Factors
• What are density-dependent factors?– Factors that depend upon the size of
the population. These factors will have an increasing effect as the population size increases.
• Examples?– Availability of food and water,
competition, predators, and disease
Competition• What is competition?
– Competition is “a symbiotic relationship between or among living things for resources, such as food, space, shelter, mate, ecological status, etc.”.
• Examples?– Trees that grow very close together vie
for sunlight and soil nutrients, lions and tigers that vie for similar prey, and a farm of rice paddies with weeds
growing in the field
Competition• What happens to competition
between individuals as population size increases?
– Competition will also increase. – If the demand for resources exceeds
the supply, then the population size will eventually decrease.
Density-Independent Factors
• What are density-independent factors?– Factors that are not dependent upon
the size of the population and can affect any population.
• Examples?– Temperature, weather (storms,
floods, drought), and habitat disruption by humans
Carrying Capacity
Carrying Capacity• Carrying capacity is the “largest
number of individuals of a particular species that can survive over long periods of time in a given environment.”
• Why is knowing carrying capacity important to ecologists?
Application•Stemscope worksheet
reading and Writing
Connection/Exit
• Your parents are not home and you are required to make dinner for everyone. What steps would you take to make a spaghetti dinner, starting with the least important to the most important Then explain how leaving out one of those steps could change what you make.
13 148/31/15 Levels of Organization8/31/15
Starter: What is an ecosystem?
Practice: Notes
Application:
StemScopes Worksheet
Connection/Exit:Your parents are not home and you are required to make dinner for everyone. What steps would you take to make a spaghetti dinner, starting with the least important to the most important Then explain how leaving out one of those steps could change what you make.
Levels of Organization
EQ: Explain the levels of organization in living organisms
