changes in ecosystems changes, changes, changes change is always occurring in ecosystems. all...
TRANSCRIPT
CHANGES IN ECOSYSTEMS
CHANGES, CHANGES, CHANGES
• Change is always occurring in ecosystems.
• All organisms, including humans, cause change.
• Two types of changes:
• Natural- happens naturally• Human- caused by humans
NATURAL CHANGES: DETRIMENTAL
• Detrimental means harmful, so a detrimental change to an ecosystem is a change that does harm.
• Drought- a long period of time with little or no precipitation.
OTHER NATURAL, DETRIMENTAL CHANGES
• Natural disasters sometimes bring detrimental changes.
• Examples:
• forest fires• tornadoes• flooding• hurricanes• earthquakes
OTHER NATURAL, DETRIMENTAL CHANGES
• Overpopulation- when an ecosystem has too many of at least one kind of living thing.
• For example, what problems may arise if there was an overpopulation of coyotes in forest ecosystem ?
• More rabbits would be eaten, so the rabbit population would decrease.
• If there are no rabbits left, what would the coyotes do?
DETRIMENTAL CHANGES CAUSED BY HUMANS
• Pollution- happens when harmful substances are added to Earth’s water, air, or land.
• Acid rain- acids mix with water in the air and fall to the Earth.
DETRIMENTAL CHANGES CAUSED BY HUMANS
• Construction causes detrimental changes to ecosystems.
• Deforestation- cutting down trees in a forest area
NATURAL CHANGES: BENEFICIAL
• Beneficial means helpful, so a beneficial change to an ecosystem is something that is helpful.
• Overpopulation can be beneficial.
• An overpopulation of rabbits is detrimental for the rabbits because there are not enough resources for all of them.
• BUT… it’s beneficial for coyotes. They will have MORE to eat!!!
BENEFICIAL CHANGES CAUSED BY HUMANS
• Laws can be made that decrease or stop pollution, littering, acid rain, and deforestation.
• Planting trees or other plants is beneficial to every kind of ecosystem.
• The Three R’s: Recycle, Reduce, Reuse
BENEFICIAL CHANGES CAUSED BY HUMANS
• New vehicles are being made that use less oil. This means less of damaging ecosystems for oil.
• New technology uses less electricity. This means less mining for coal.
How could this beaver building a dam be a beneficial change? How could it also be a detrimental change?
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