Scenario: Northern pike (it’s a fish) feed on another fish, the yellow perch. An increase in the yellow perch population causes an increase in the northern pike population. What limiting factor is present?

Scenario: Humans rely on oil to fuel their vehicles. The BP company produces lots of oil. In 2010, the BP oil spill in the Gulf of Mexico harmed many aquatic organisms that lived in the Gulf region. What limiting factor is present?

Scenario: A new strain of influenza (the flu) breaks out in New York City. What limiting factor is present?

Scenario: A population of rabbits and a population of deer are both feeding off the same plants in the same habitat. What limiting factor is present?

Scenario: Hurricane Katrina forced thousands of people to leave New Orleans. What limiting factor is present?

Scenario: Due to humans putting increasing amounts of greenhouse gases into the atmosphere and cutting down trees that would normally take up some of those gases, the Earth slowly gets warmer and changes climates around the globe. What limiting factor is present?

Plants like Dogwood and specific fern species don’t need that might sunlight to survive so they rely on shade from taller trees to protect them so they don’t burn. Does this scenario indicate the presence of a density-dependent factor or density-independent factor?

Rainbow smelt fish and yellow perch fish attempt to occupy the same area in a freshwater lake. The more aggressive rainbow smelt survive, the yellow perch do not. Does this scenario indicate the presence of a density-dependent factor or density-independent factor?

Is this a density dependent or density independent factor: Spring seasonal cycles

Is this a density dependent or density independent factor: more predators nearby

Is this a density dependent or density independent factor: human development

Is this a density dependent or density independent factor: tornadoes

Is this a density dependent or density independent factor: parasites