CONSERVATION ECOLOGY 1

BIODIVERSITY Biodiversity = the variety of organisms in a community Tropical Rainforest Coral Reef Photos by: Kristin McCully 2

World Biodiversity 3

World Biodiversity 4

How do humans impact biodiversity? Introduction of exotic species Habitat destruction Hunting/fishing Pollution Climate change 5 Other (2%) Known Causes of Animal Extinctions Since 1600 Modified from:

t_pest_info/lba_moth/gallery.shtml Photo UCCE Santa Cruz USDA blackberry Invasive Species Light Brown Apple Moth 6

Habitat Destruction Ex: Deforestation Why? – Agriculture – Logging – Mining – Urban sprawl Why not? – Loss of biodiversity – Increased vulnerability to natural disasters – Loss of ecosystem services 7 NOAA Jami Dywer (Wikimedia) Kristin McCully João Carvalho (Wikimedia)

Hunting/Fishing Alessio Marrucci (Wikimedia)

Pollution Mikael Häggström (Wikimedia) 9

REVIEW FOOD WEB ACTIVITY The 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 Which of these graphs most likely shows how the ban of DDT affected the bald eagle population? A B C D 10

REVIEW FOOD WEB ACTIVITY Source: Center for Biological Diversity 11

Global Climate Change 12 Get the most recent data at: mlo_full mlo_full

Global Climate Change 13

Global Climate Change 14