Ecosystem Disruptions and Food Webs

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8 Terms

1
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Intervention

the act of interfering in a process in the hopes of improving a result

<p>the act of interfering in a process in the hopes of improving a result</p>
2
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Causes of population changes

1. Moving In - individuals move into a population from another area

2. Moving Out - individuals move out of a population to another area

3. Birth Rate - births in a population rise or fall more than usual

4. Death Rate - deaths in a population rise or fall more than usual

3
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Invasive species

plants and animals that have migrated to places where they are not native

<p>plants and animals that have migrated to places where they are not native</p>
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Food web

a system of interlocking and interdependent food chains.

<p>a system of interlocking and interdependent food chains.</p>
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Food chain

A series of events in which one organism eats another and obtains energy.

<p>A series of events in which one organism eats another and obtains energy.</p>
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Energy pyramid

for every trophic transfer after chemical energy, 10% of energy is lost with every trophic level

<p>for every trophic transfer after chemical energy, 10% of energy is lost with every trophic level</p>
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Trophic level

step in a food chain or food web

<p>step in a food chain or food web</p>
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3 Resources organisms need

1. food

2. water

3. shelter