Interactions in Ecosystems

Biodiversity makes an ecosystem

• weaker because there are too many species competing

• stronger because the different species make an ecosystem more resistant to environmental pressures

• stronger because having less diversity means the species remaining can grow

• weaker because the different species make an ecosystem too crowded

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What is biodiversity?

• The number of organisms in an environment

• How many different types of organisms in an environment

• How many different places there are to live in

• The number of different environments on earth (ex. desert, rainforest, grassland, etc

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An organism is

• A living thing

• A plant

• An animal

• An insect

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An invasive species

• is good because it adds diversity

• is bad because it causes damage to an ecosystem

• is good because it strengthens an ecosystem

• is bad because species move away

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In our assignment this week, what was the invasive species that decreased the trout population

• sharks

• sea lions

• sea lamprey

• jellyfish

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Sea lamprey eat and kill trout. Sea lamprey are considered

• Predator

• Prey

• Neutral

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A decrease in what organism would cause the MOST damage to this ecosystem

• lion

• snake

• goat

• green plant

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An invasive species

• Is a species that moved into an area it is usually not found

• Is a species that always lived in the area that stars to grow out of control

• can never be stopped

What has the most energy in an ecosystem

• producers

• primary consumers

• secondary consumers

• tertiary consumers

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A population is

• A part of the organisms of the same species in a given area

• The number of overall organisms in a given area

• The number of organisms of the same species in a given area