Warm Up 4/4

Plant Quiz You may use your lab!!

Don’t forget – Plant Project is Due 4/10

For the next activity, everyone needs a pair of scissors.

Ecosystem Interactions Cut out and glue the vocabulary words IN THIS ORDER into a

column in your spiral. Be sure to leave room for the definition and example to the right of the word. Biotic Abiotic Population Density Population Growth Exponential Growth Logistic Growth Carrying Capacity Density-Independent Limiting Factor Density-Dependent Limiting Factor Ecological Succession Primary Succession Secondary Succession

Ecosystem Interactions Cut out the definitions. Match them up to the words, do the best you

can. Now cut out the examples. Match them up to the words, do the best you

can. We will be going over this in class.

DON’T GLUE TILL YOU KNOW IT’S RIGHT!

Ecosystem Interactions& Populations

Biotic Factors

Biological influences that include the entire living cast of characters in which an organism might interact

Examples: bacteria, plants, bullfrogs, birds, Mrs. Vohl, Chupacabra

Abiotic factors

Physical or nonliving factors that shape ecosystems

Examples: wind, hurricanes, soil, temperature, light, this classroom

Population Density The number of individuals per unit area

Population Growth

# of births, # of deaths & # of people leaving and/or entering

Population Immigration Emigration

Exponential Growth

Reproduction at a constant rate; unlimited resources

Logistic Growth

Population growth slows or stops after exponential growth; limited resources

Carrying Capacity

The largest number of individuals that a given environment can support

Density-Independent Limiting Factors

Causes population to decrease regardless of population size

Weather, natural disasters, human activities

Density-Dependent Limiting Factors

Causes population growth to decrease when density is high

Types of Density-Dependent Factors

1. Competition2. Predation3. Parasitism &

Disease

Ecological Succession A series of predictable changes that occurs in

a community over time Can be caused by slow changes in the

physical environment or a sudden natural disturbance fromhuman activity (clearing a forest)

Primary Succession Succession that occurs on surfaces where no

soil exists (volcanic eruptions) The pioneer species on volcanic rocks are

often lichens (combination of fungus and algae)

Secondary Succession A disturbance of some kind changes an

existing community without removing the soil

Password Review

Link

Succession Reading and Worksheet You have a class set of a reading that talks

about succession happening in a pond. Read the information and answer the

questions.

Cool Down What is the difference between primary and

secondary succession? What is the difference between density-

dependent and density-independent limiting factors? Give an example of each.

Clean up! Put your scissors and glue sticks away. Throw away your trash. Leave your table tidy!