Ecosystem Disturbances LS2-6

Invasive plant species affect the interactions of living and nonliving components of an ecosystem, so the removal of invasive plants is often necessary. The goal of most

plant-control methods is to disrupt or inhibit the function of different plant systems. For example, insects can be used to chew through roots in order to reduce a plant’s ability to absorb water.

Which of these functions would be most immediately affected by a reduction in water uptake by roots?

• Disease resistance

• Seed dispersal

• Sunlight absorption

• Photosynthesis

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Species richness is

• a measure of how all of the individual organisms in an ecosystem are balanced between the different species.

• the total number of different species found in an ecosystem

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True or False: higher species diversity allows for more resilience

• true

• false

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A species that plays a critical role in the health, maintenance, or growth of an ecosystem.

• keystone

• invasive

• engineer

• predator

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What is a native specie?

• A specie that is local and has lived in the same place
• A specie who has come from another state or country
• A specie that has no "home" and travels for its whole life
• None of the above

Invasive species [more than 1 answer]

• take over the habitat of other organisms

• increases the populations of native organisms

• destroy/decrease biodiversity

• improves/increases biodiversity

• cause the populations of native organisms to decrease

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When an ecosystem has a greater biodiversity, what does that allow the ecosystem to do? choose the best answer

• recover more easily from stresses on the ecosystem

• make the area more inviting to non-native predators

• support more populations of organisms

• attract more species to live there

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Invasive species alter the ecosystem by a___________in number quickly,this leads to _____ food for the native  species. 

• increasing  less
• decline  decreasing

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When functioning properly, ecosystems house organisms that keep each other’s populations _________________.

• balanced

• in peril

• extinct

• growing out of control

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Why are Burmese pythons not a problem in their native Asia, but are a problem in Florida?

• They are much bigger in Florida

• Diseases, parasites, and predators help to control their population in Asia

• They have more predators in Florida

• They have less predators in Asia

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