ENDANGERED SPECIES

1.2.3.4.BIOLOGICAL DIVERSITY

SPECIES = a group of closely related organisms capable of

breeding and producing fertile

offspring

Every day , somewhere on Earth, a unique species of organism becomes extinct

Over 1.7 million species known to science, most are INSECTS (see p 241)

4.5.Levels of BIODIVERSITY

BIOLOGICAL DIVERSITY -refers to the # and type of

species in a given area -an important natural resource SPECIES = all different populations ECOSYSTEM = variety of habitats

and eco- logical processes GENETIC = all the different D.N.A.

6. Benefits of Biodiversity

Stability of ecosystem Sustainability of ecosystem Species survival Human use and benefit - medicine - shelter -

products - food - clothing -

knowledge - crops(hybrids)

7.Pacific Yew

Slow growing tree in old growth forests of Pacific North West

Considered ‘trash’ tree

Bark contains TAXOL

Promising treatment for breast and ovarian cancer trt

7.Purple foxglove

Contains DIGITALIS

Prevents ‘dropsy’ (heart failure)

8. Keystone species

(8A) Why save species?(bottom of p 1 notes)

Ethical reasons- the right thing to do, right to exist

Aesthetic reasons- beauty, enjoyment, pets, nature

Commercial- agriculture, jobs, tourism, fishing & hunting

Major extinctions- see p 245

All genera

Well defined genera

Trend line

Big Five mass extinctionsOther mass extinctions

Million Years Ago Thousands of Genera

10.LEVELS OF THREAT

EXTINCT- gone forever

ENDANGERED- likely to b/c extinct w/o

protective measures

THREATENED- has a declining population

likely to b/c endangered

See table p 246

11.Prone to Extinctions

Rate of extinctions increasing Since 1800 up to 25% of all species

extinct

Species with small populations Species with a limited range Migratory species Species with special needs Species exploited by humans

12.Why are Species in Danger?

Destruction of habitatIntroduction of nonnative species

Pollution/PesticidesOverharvestingClimate Change

AREAS of Critical Biodiversity

Tropical Rain Forests

Coral ReefsCoastal AreasIslands

13.Biodiversity Hotspots- p 250

The most remarkable areas on earth are also the most threatened. These are the Hotspots, the richest and most threatened reservoirs of plants and animal life on Earth.”

14.California Floristic Province

Zone of Mediterranean climate

Many unique plants like Giant Sequoia

Also critically endangered Ca. Condor

Threatened by farming, pollution, overpopulation, road building etc.

15. Cross out question

INSTEAD:

Answer Questions 20-21-22-23 On page 260 in the space for #15

16.How do we Conserve Species?

Captive Breeding Preservation of Genetic Material Zoos, Parks and Gardens Research Protection of habitats & ecosystems International cooperation Laws

California Condor

International Cooperation

International Union for the Conservation of Nature and Natural Resources (I.U.C.N.)- produce RED LIST

The Convention on International Trade in Endangered Species-elephants and ivory

17. Endangered Species Act

Signed by President Nixon in 1973 Protect species from economic

growth & development Overseen by N.O.A.A. and U.S. Fish &

Wildlife Must make list of endangered

species Must protect from human harm Must prevent projects that jeopardize

species Must create recovery plan

Research Endangered Species in your assigned Country

Media Center Work:

Monday Nov 26th- Period 11

Tuesday Nov 27th- Period 4/5

Come in to class Wednesday with the info on your Endangered Species