Warm Up 4/9

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. 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 Emigration # of births, # of deaths & # of people leaving and/or entering Immigration Population 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 Competition Predation 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 from human 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

Succession video

Password Review Link

Six Weeks Test Next Wed/Thu Let me know if you want the review early, it will be due on test day. Everyone else will get it on Monday

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!