Warm-Up / EOC Prep1. After a volcanic eruption has covered an area with lava, which of the following is the most likely order of succession in the repopulation of the area?

A. lichens grasses shrubs treesB. mosses grasses lichens treesC. grasses trees mosses lichens

D. shrubs grasses trees lichens

2. Driving your car directly impacts which nutrient cycle? A nitrogen B carbonC water D phosphorus

Agenda• Warm Up • Quick look at endangered species• Guided Notes • Biological Magnification Worksheet / Graphing• Ecology Review Puzzle • Clean-Up

Biodiversity

Guided Notes 11

Value of Biodiversity

• Variety = Diversity• Biodiversity-the total of the genetically based

variety of all organisms in the biosphere• Ecosystem Diversity-the variety of habitats,

communities, and ecological processes in the living world

Value of Biodiversity

• Species Diversity-number of different species• 1.5 million species currently exist• Genetic Diversity-total of all the different

forms of genetic information carried by all organisms living on Earth

Value of Biodiversity

• Biodiversity is one of Earth’s greatest natural resources. Species of many kinds have provided us with foods, industrial products, and medicines—including painkillers, antibiotics, heart drugs, antidepressants, and anticancer drugs

Value of Biodiversity

• The biodiversity represented by wild plants and animals is a kind of “library” of genetic information upon which humans can draw for future use

• When biodiversity is lost, potential sources of material with significant value to the biosphere and humankind may be lost with it.

Threats to Biodiversity

• Human activity can reduce biodiversity by causing the following:

1.Habitat Destruction2. Wildlife Products Demand3. Pollution4. Invasive species

Threats to Biodiversity

• Extinction-when a species disappears from all or part of its range

• Endangered species-a species whose population size places it in danger of extinction

Pollution

• Pesticide-a chemical used to kill insects• DDT-harmful pesticide banned in the 1970s

after causing major harm to bald eagles and other large birds

• However, DDT helps stop insect-borne diseases such as malaria.

• Biological magnification-concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web

• Therefore the pollution gets worse at each level as you go up.

Pollution

• Silent Spring is a book written by Rachel Carson in 1962.

• The book condemned the use of DDT as a pesticide. Carson claimed that DDT was causing birds to produce eggs with thin shells that caused a lot of deaths.

• Silent Spring was a very controversial book and started a lot of discussion that led to the banning of DDT.

• The book is also credited with starting the environmental movement of the 1970s that tried to prevent actions that harmed the environment.

Conservation• Conservation-the wise management of

natural resources including the preservation of habitats and wildlife

• Many efforts are aimedat managing individualspecies to keep themfrom becoming extinct

Conservation

• Today, conservation efforts focus on protecting entire ecosystems as well as single species. Protecting an ecosystem will ensure that the natural habitats and the interactions of many different species are preserved at the same time.

• REVIEW

• the wise management of natural resources including the preservation of habitats and wildlife is called…

• Conservation

• Name the four threats to biodiversity:

• Habitat destruction• Wildlife products• Pollution• Invasive Species

• The total number of individuals that an environment can support is called…

• Carrying capacity

• An organism’s role in its environment, the food it eats, and the place where it lives is called its…

• Niche

• What type of growth do humans show and why?

• Exponential-medicine, sanitation, health care

• The variety of life on earth is called…

• biodiversity

Reminders

• Biome Brochure Due Next Fri. (Feb. 18th)

Warm-Up / EOC Prep1. In a stable, long-existing community, the establishment

of a single species per niche is most directly the result of

A. parasitism B. competitionC. interbreeding D. overproduction

2. If a single plant species is removed from a food web, then most likely - A. an animal species will fill the unoccupied nicheB. other plants will produce enough food for herbivoresC. dependent herbivores will have to find new food sourcesD. carnivores will be unaffected by the loss

Agenda• Warm Up • Over The Hedge• Clean-Up• Cool-Down

Biome Brochure Due Friday.Ecol. Exam Thursday.