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•Review your notes

•Ecosystem quiz coming up in 10 min.

Due Today:Reading worksheets (pages 39,40)Gizmo: Pond Ecosystem: warm upUSA Test Prep (due by midnight)

Homework Due on ThursdayGIZMO Pond Ecosystem

Activity A & B + Quiz Finish Worksheet Pages 45-47

Homework and Announcements

Ecosystem Quiz

Title: Biodiversity

L.O. SWBAT discuss the importance of species diversity in an ecosystem.

Succession

A series of predictable changes that occur in a community over time, usually after a disturbance

2 types: 1. Primary succession2. Secondary succession

Primary vs. Secondary• no remains of the

original community (volcanic eruption)

• Pioneer species: first species to colonize the barren area-Usually grass or fungus

• some of the original community is still left behind (fire, hurricane, human interference)

• Much faster that primary succession / no pioneer species

Climax CommunitiesThe maximum amount of organisms a community can hold

• natural disturbances: usually reaches its previous climax community

• human disturbances: the ecosystem may or may not recover

Biodiversity

Biodiversity• The total of all genetically based variations of

organisms in the biosphere• 3 types of biodiversity:

1. Ecosystem diversity2. Species diversity3. Genetic diversity

Ecosystem Diversity• Variety of habitats, communities, and ecological

processes in the biosphere

Species Diversity

Different species in the biosphere or in a particular area

Genetic Diversity

Different genetic forms carried by a particular species

Valuing Biodiversity• contributes to medicine, agriculture, and

ecosystems•Remember Keystone species!

• Example: Sea Otters!

Think about it….

Why should WE value biodiversity of humans?

Why we should WE value the biodiversity of plants, animals, etc.?

Threats to Biodiversity• We are pushing animals to extinction at 1000 times the

rate it naturally is!• If we kill off genetic diversity, we kill species diversity,

and eventually ecosystem diversity!

Human Impact

• We destroy habitats, hunt, introduce invasive species, release pollution into food webs, and contribute to climate change (global warming!)

What can we do to protect biodiversity?

• Protect individual species• Preserve habitats and ecosystems• Have benefits for human neighbors of conservation

areas

What can we do to protect biodiversity?

Target ecological hotspots: areas that are in immediate danger of extinction

Summary5 Minutes of Silent Writing Time….

Why is it important to have species diversity?What kind of impact are humans having on global ecosystems? What can we do to protect biodiversity?