Ecosystem Stability

Largest number of individuals of a population that a environment can support

• population 
• limiting factor
• carrying capacity
• none of these

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.
• There would be a decrease in the grass/flowers population.
• There would be a decrease in the mice population.
• There would be an increase in the grass/flowers population.

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What would most likely happen if an ecosystem no longer received sunlight?

• The number of herbivores would increase
• The number of plants would increase
• all organisms would adapt
• All living organisms would eventually die

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Examples of how humans negatively affect local ecosystems are

• Building dams, deforestation (cutting down trees), adding point sources to nearby streams to allow for run-off, building roads and structures, and salting roads.
• Creating laws to prohibit fishing from local streams.
• Planting trees and other plants to attract native species.
• Removing non-native species from the environment.

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A species that is not native to an area is called:

• Native Species

• Natural Species

• Nonnative Species

• Symbiotic Species

What is ecology?

• the study of animals

• astronaut school

• a deadly bacteria

• the study of ecosystems

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What is an ecosystem?

• all the living and nonliving factors in an area

• a system of pipes and drains in a field

• all the living organisms in an environment

• an organization system used by scientists

What is a niche?

• a stinging insect found in Utah's deserts

• a strange smelling marsh

• the only mysterious fish that lives in the Great Salt Lake

• an organisms specific role in its environment

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What is competition?

• an interaction between two species where both benefit

• an interaction that occurs when two species compete for the same resource

• when one animal eats another

• a soccer game

What is a limiting factor?

• any factor that helps a living thing grow

• the opposite of multiplication

• any factor that limits population growth

• any factor that makes a population grow

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NGSS.MS-LS2-4

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