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en.wikipedia.org
https://en.wikipedia.org/wiki/Ecosystem
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Organic Keywords: 26,359,258
Organic Competitors: 968
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PPC Keywords: 20
PPC Competitors: 165
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2. |
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eschooltoday.com
http://eschooltoday.com/ecosystems/what-is-an-ecosystem.html
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Organic Keywords: 13,920
Organic Competitors: 15
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PPC Keywords: 0
PPC Competitors: 0
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kidsgeo.com
http://www.kidsgeo.com/geography-for-kids/0164-ecosystems.php
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Organic Keywords: 5,935
Organic Competitors: 703
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PPC Keywords: 0
PPC Competitors: 0
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4. |
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brainpop.com
https://www.brainpop.com/science/ecologyandbehavior/ecosystems/
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Organic Keywords: 24,368
Organic Competitors: 879
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PPC Keywords: 0
PPC Competitors: 4,358
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link.springer.com
http://link.springer.com/journal/10021
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Organic Keywords: 346,457
Organic Competitors: 0
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PPC Keywords: 2
PPC Competitors: 0
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nhptv.org
http://www.nhptv.org/natureworks/nwepecosystems.htm
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Organic Keywords: 9,834
Organic Competitors: 786
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PPC Keywords: 0
PPC Competitors: 0
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dictionary.com
http://www.dictionary.com/browse/ecosystem
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Organic Keywords: 950,804
Organic Competitors: 701
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PPC Keywords: 0
PPC Competitors: 275
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8. |
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globalchange.umich.edu
http://www.globalchange.umich.edu/globalchange1/current/lectures/kling/ecosystem/ecosystem.html
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Organic Keywords: 1,321
Organic Competitors: 886
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PPC Keywords: 0
PPC Competitors: 0
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9. |
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geography4kids.com
http://www.geography4kids.com/files/land_ecosystem.html
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Organic Keywords: 2,007
Organic Competitors: 794
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PPC Keywords: 0
PPC Competitors: 0
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10. |
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forest.mtu.edu
http://forest.mtu.edu/kidscorner/ecosystems/definition.html
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Organic Keywords: 367
Organic Competitors: 1,119
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PPC Keywords: 0
PPC Competitors: 0
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