Presentation on theme: "Chapter 10: Biodiversity"— Presentation transcript:
1 Chapter 10: Biodiversity Mr. ManskopfNotes also are at
2 Chapter 10 Biodiversity Big Ideas There is a huge diversity of life on Earth that is critical to all species. .There are some factors about species that make them prone to extinction.Human activities are causing large numbers of species to go extinct.
3 Section 1: What is biodiversity? How many species live on Earth?Describe the types of biodiversity.Explain why biodiversity is important.Terms: biodiversity, genes, keystone species, ecotourism
7 BiodiversityBiodiversity: the number of different species in a given areaTropical rain forestsWhat factors lead to biodiversity?
8 Types of BiodiversitySpecies Biodiversity: number of different species in an areaEcosystem Diversity how many types of habitats in an areaGenetic Diversity the number of genes in all members of a population
9 Ecosystem diversity often leads to species diversity and often genetic diversity
10 What is a gene?Gene: a piece of DNA code for a specific trait inheritedTall, short, brown eyes, etc.Genetic Diversity among corn
11 Why is genetic diversity important? Cavendish banana“ The fungus Fusarium oxysporum wiped out the previous species of bananas (the Gros Michel) in the 1950s. Now it’s back, having evolved to be able to take on the previously resistant “back-up” species of banana — the Cavendish — that replaced the superior Gros Michel banana after it was wiped out. “
12 Benefits of DiversityKeystone Species: species that is critical to ecosystem survivalSea otterGrey WolfBeaver
20 Section 2: Biodiversity at Risk What does it mean when a species is threatened or endangered?What makes some species more prone to extinction?What are the largest threats to biodiversity?What areas are likely to have high biodiversity?Terms: endangered species, threatened species, exotic species, endemic species, poaching
21 Biodiversity has increased over time, but mass extinctions are also natural events (5 major events) How do we get this data?
22 Extinctions Species gone forever NORMAL Mass Extinction: short period of time when large number of species go extinct (65 MYA)Currently in mass extinction…caused by humansRapid climate change
41 Areas of Critical Biodiversity Tropical Rain ForestsCoral ReefsCoastal EcosystemsIslandsWhy these areas????
42 Section 2 ReviewWhat does it mean when a species is threatened or endangered?What makes some species more prone to extinction?What are the largest threats to biodiversity?What areas are likely to have high biodiversity?Terms: endangered species, threatened species, exotic species, endemic species, poaching
44 Section 3: Future of Biodiversity List and describe efforts to save individual species.Explain the advantages of protecting entire ecosystems rather than individual species.Describe the main parts of the Endangered Species Act.Terms: Endangered Species Act, habitat conservation plans, CITES
45 Saving Individual Species Captive Breeding Programs: breeding species in captivity with hopes of reintroducing into native habitatsGerm Plasm: saving genetic material for possible future use(seeds, eggs, DNA)Zoos and Aquariums
46 Saving Individual Species Does little to preserve speciesCaptive individuals may not survive in wildSmall populations have difficult time with inbreeding, diseasesLast resorts
47 Preserving Habitat and Ecosystems Most effective way to save a species is protect its habitat.Some species require large areasWhat about when they leave protected areas? (Wolves in Yellowstone
48 Legal Protections Many countries have laws to protect wildlife Some weak some strongU.S. law Endangered Species Act (ESA)
49 ESA Endangered Species Act Passed 1973 Protect plant and animals in danger of extinctionList created of those threatened and endangeredCurrently 1,272 listed
51 ESA Protects listed species from harm No development that harms listed speciesWhat does that all mean?Can a Shopping Mall be built where listed species lives?Spotted Owl
52 ESA Species recovery plan must be made Habitat Conservation Plans: plans to protect species habitatWhy do you think ESA may be controversial?Who would not like this law?
53 ESA ESA: 1973-2004: 92 to 1,272 species listed 37 Species removed (14 recovery, 8 extinctions, rest discovered more)60% plants, 40% animalsTNC says 1/3rd of all U.S. species…30,000 not 1,260
54 InternationallyCITES (Convention on International Trade of Endangered Species) illegal to trade endangered speciesIvory Tusks
55 Internationally Much more difficult among may poorer countries International treaties hard to ratify, verifyOceans of particular concern
56 Section 3 Review List and describe efforts to save individual species. Explain the advantages of protecting entire ecosystems rather than individual species.Describe the main parts of the Endangered Species Act.Terms: Endangered Species Act, habitat conservation plans, CITES
57 Chapter 10 Biodiversity Review There is a huge diversity of life on Earth that is critical to all species. .There are some factors about species that make them prone to extinction.Human activities are causing large numbers of species to go extinct.