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Changing Ecosystems

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julie sippola

on 3 November 2014

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Transcript of Changing Ecosystems

earthworms
birds
beneficial
(good)
detrimental
(bad)
neutral
(not good or bad)
Some changes are caused by natural factors
Some changes are caused by humans
Changes to Ecosystems
desertification-caused by abusing the land-either overgrazing or cutting down trees
loss of habitat-destroying animals' homes to build our homes, roads, create fields for crops
Climate change-the Earth goes through warming and cooling cycles. However, data shows the Earth has warmed more in the last 50 than it should. The reasons are due to humans-too much pollution, too much carbon dioxide..just too much.

http://cet.pbslearningmedia.org/resource/ipy07.sci.ess.earthsys.glacierphoto/documenting-glacial-change/

Changes can happen quickly or slowly
deforestation-just what it sounds like...cutting down forests
If there was a drought (a long period of time without rain) in an ecosystem how would the plants and animals be affected?

Fires, floods and other natural disasters can change an ecosystem quickly. Would this have the same effect?
The effect can be
Invasive Species
An invasive species is an type of animal that is introduced into an ecosystem that doesn't belong there.
Did you know..there are more tigers living in captivity than in the wild?
Deforestation has many negative effects on the environment. The most dramatic impact is a loss of habitat for millions of species.
Seventy percent
of Earth’s land animals and plants live in forests, and many cannot survive the deforestation that destroys their homes.
The world’s rain forests could completely vanish in a hundred years at the current rate of deforestation
Forests are cut down for many reasons, but most of them are related to money or to people’s need to provide for their families.
It invades and takes over. How could this affect other animals and their basic needs?
• Arctic ice is rapidly disappearing, and the region may have its first completely ice-free summer by 2040 or earlier. Polar bears and indigenous cultures are already suffering from the sea-ice loss.
• Coral reefs, which are very sensitive to small changes in water temperature, suffered the worst bleaching—or die-off in response to stress—ever recorded in 1998, with some areas seeing bleach rates of 70 percent. Experts expect these sorts of events to increase in the next 50 years as sea temperatures rise.
• An upsurge in the amount of extreme weather events, such as wildfires, heat waves, and strong tropical storms, is also attributed in part to climate change by some experts.
beavers
How do these animals change their environment and is the effect, beneficial, neutral or detrimental?
Change is a part of life. However, sometimes changes can have dramatic effects.
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