CONSERVATION ECOLOGY 1.
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Transcript of CONSERVATION ECOLOGY 1.
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CONSERVATION ECOLOGY
http://www.nps.gov/chis/photosmultimedia/santa-cruz-island-photo-gallery.htm
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BIODIVERSITY• Biodiversity = the variety of organisms in a
community
Tropical Rainforest
Coral Reef
Photos by: Kristin McCully
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World Biodiversity
http://www.globalchange.umich.edu/globalchange2/current/lectures/biodiversity/biodiversity.html
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World Biodiversity
http://www.globalchange.umich.edu/globalchange2/current/lectures/biodiversity/biodiversity.html
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How do humans impact biodiversity?
• Introduction of exotic species• Habitat destruction• Hunting/fishing• Pollution• Climate change
Species In-troductions
(39%)Habitat De-
struction (36%)
Hunting (23%)
Other (2%)
Known Causes of Animal Extinctions Since 1600Modified from: http://www.globalchange.umich.edu/globalchange2/current/lectures/biodiversity/biodiversity.html
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http://www.aphis.usda.gov/plant_health/plant_pest_info/lba_moth/gallery.shtml
Photo UCCE Santa Cruz - http://ucanr.org/blogs/blogcore/postdetail.cfm?postnum=2830
USDA blackberry
Invasive Species
Light Brown Apple Moth
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Habitat Destruction
• Ex: Deforestation• Why?
– Agriculture– Logging– Mining– Urban sprawl
• Why not?– Loss of biodiversity– Increased vulnerability to
natural disasters – Loss of ecosystem services
NOAA
Jami Dywer (Wikimedia)
Kristin McCully
João Carvalho (Wikimedia)
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Hunting/Fishing
1936
1870
1952
2006
Alessio Marrucci (Wikimedia)
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Pollution
Mikael Häggström (Wikimedia)
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REVIEW FOOD WEB ACTIVITYThe pesticide DDT was used to kill mosquitoes for many years.
DDT entered bodies of water, moved up the food chain, and built up in the tissues of fish. When female bald eagles ate these fish, they produced eggs with very thin shells. The eggs broke when the eagles sat on their nests. The U.S. government banned the use of DDT in 1972.
Which of these graphs most likely shows how the ban of DDT affected the bald eagle population?
AB C D
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REVIEW FOOD WEB ACTIVITY
Source: Center for Biological Diversityhttp://www.biologicaldiversity.org/species/birds/bald_eagle/report/index.html
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Global Climate Change
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Global Climate Change
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Global Climate Change
http://www.rosamundwo.com/2009/the-sixth-extinction/