Ecology and Populations Review

Identify the following relationship and explain why The cattle egret eats insects that have been disturbed when the cattle forage. A hermit crab taking up residence in an empty seashell. Fleas and mosquitoes feed on blood from other organisms Aphids eat sap from plants. In the ocean, certain species, like shrimps and gobies, will clean fish. They remove parasites, dead tissue, and mucous.

Draw a food chain that has 5 trophic levels. Label each trophic level with the following terms: autotroph, heterotroph, producer, primary consumer, secondary consumer, tertiary consumer, quaternary consumer, carnivore, herbivore.

Take your food chain and convert it into a into a biomass pyramid. Label the trophic levels with the quantity of biomass as each level. Start with 632, 980 kg.

Identify the different types of pyramids

Draw a logistic curve and label the parts. Include title and axis and say what is happening at each part of the trend line. Does the logistic growth curve exhibit positive or negative feedback loop? Why?

Draw an exponential curve and label the parts including title and axes. Does the exponential curve exhibit positive or negative feedback loop? Why?

Last year there were 1907 students at Skyline High School. 213 students graduated. This year there are 278 freshmen. 25 students go to BC for running start. What is the population of Skyline this year?

Skyline High School is a 25,000 square foot building. There are 2070 students who go to the school. What is the population density?

Skyline High school started the school year with 2070 students. Since September, 15 students withdrew due to moving to another district and 2 more are now homeschooled. There has been 45 new students who have moved into the area. What is the present population of students at Skyline High school? *Note: All numbers are made up.

Define the following terms and give examples of each. – Community – Habitat – Ecosystem – Biome – Population – population dispersion – density independent and density independent limiting factors – Abiotic and biotic