changing ecosystems
DESCRIPTION
Changing Ecosystems. Human Impact on Tundra. Human Impact on Temperate Deciduous Forest. Human Impact on Temperate Rain Forest. Human Impact on Tropical Rain Forest. Human Impact on Desert. Human Impact on Grassland. Human Impact on Rivers and Streams. Human Impact on Lakes and Ponds. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/1.jpg)
Changing Ecosystems
![Page 2: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/2.jpg)
Human Impact on Tundra
![Page 3: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/3.jpg)
Human Impact on Temperate Deciduous Forest
![Page 4: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/4.jpg)
Human Impact on Temperate Rain Forest
![Page 5: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/5.jpg)
Human Impact on Tropical Rain Forest
![Page 6: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/6.jpg)
Human Impact on Desert
![Page 7: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/7.jpg)
Human Impact on Grassland
![Page 8: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/8.jpg)
Human Impact on Rivers and Streams
![Page 9: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/9.jpg)
Human Impact on Lakes and Ponds
![Page 10: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/10.jpg)
Human Impact on Wetlands
![Page 11: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/11.jpg)
Human Impact on Coral Reefs
![Page 12: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/12.jpg)
Some changes to an ecosystem are natural, some are man-made
![Page 13: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/13.jpg)
How Ecosystems Change Naturally
![Page 14: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/14.jpg)
What changes will you see?
![Page 15: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/15.jpg)
![Page 16: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/16.jpg)
Succession
• The normal, gradual changes that occur in the types of species that live in an area.
![Page 17: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/17.jpg)
![Page 18: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/18.jpg)
Primary Succession
• How will these areas (volcanic rock and glacial rock deposit) change?
• What will plants need to survive here?
![Page 19: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/19.jpg)
Primary Succession
• Succession that begins in a place that previously had no soil or plants.
![Page 20: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/20.jpg)
Pioneer Species
• First plants to inhabit an area.
• They often begin the soil building process by breaking down the rocks along with weathering and erosion.
![Page 21: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/21.jpg)
Lichen• A common pioneer species, it produces
acid that helps weather the rock into soil.
• When it dies, it will also help fertilize the newly forming soil.
![Page 22: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/22.jpg)
As soil forms, seeds are blown in or dropped by birds or other animals
![Page 23: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/23.jpg)
Secondary Succession
• Succession that occurs where soil is already present.
![Page 24: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/24.jpg)
Secondary succession occurs much faster than primary succession-Why?
![Page 25: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/25.jpg)
Climax Community• A community of plants that is relatively
stable and undisturbed and has reached an end stage of succession. (ex-a forest)
![Page 26: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/26.jpg)
Review
![Page 27: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/27.jpg)
What type of succession will occur here?
• Surtsey, an island off the coast of Iceland. It was created in 1963 by a volcanic eruption.
![Page 28: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/28.jpg)
Primary Succession
![Page 29: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/29.jpg)
What will the first species to move in be called?
• Pioneer Species
![Page 30: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/30.jpg)
What is a common pioneer species?
• Lichen (Like-ehn)
![Page 31: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/31.jpg)
What type of succession will occur here?
• Secondary succession
![Page 32: Changing Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062500/56815448550346895dc25a3e/html5/thumbnails/32.jpg)
What is the final stage of succession called?
• Climax Community