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Changing Ecosystems
Question | Answer |
---|---|
The series of predictable changes that occur in a community over time | Succession |
Two types of succession are: | Primary and Secondary |
___________________ is the series of changes that occur in an area where no soil or organisms exist. | Primary Succession |
The first species to populate an area are called _______________________. | Pioneer Species |
Typical pioneer species are _____________________ and ___________________. | Mosses and lichens |
As pioneer species grow they help break up the _____________ and form _____________. | Rock and Soil |
When organisms die, they provide _________________ that enrich the soil. | Nutrients |
The specific plants that grow depend on the ____________________. | Climate |
Eventually, ____________________ may lead to a community of organisms that does not change unless the ecosystem is disturbed. | Succession |
Maturity of an ecosystem may take _____________________. | Centuries |
Fires that are set on purpose to control wildfires are called __________________. | Prescribed burns |
_____________________ occurs following a disturbance to an ecosystem. Such as clearing a forest for farmland. | Secondary Succession |
Possible causes of Secondary Succession are: ______________, ______________, and _______________. | Fires Hurricanes and Tornados |
Grass poking through a sidewalk is an example of ______________________ succession. | Secondary |