Presentation is loading. Please wait.

Presentation is loading. Please wait.

Chapter 11 Biodiversity: Preserving Species. 11.1 Biodiversity And The Species Concept What is biodiversity? What are species? – Genetically Similar Organisms.

Similar presentations


Presentation on theme: "Chapter 11 Biodiversity: Preserving Species. 11.1 Biodiversity And The Species Concept What is biodiversity? What are species? – Genetically Similar Organisms."— Presentation transcript:

1 Chapter 11 Biodiversity: Preserving Species

2 11.1 Biodiversity And The Species Concept What is biodiversity? What are species? – Genetically Similar Organisms Capable of Interbreeding Among Themselves – With Some Exceptions (Dogs, Wolves and Coyotes) – The Red Wolf (Canis Rufus) – Is it a Species? – Really Problematic at the Microscopic Level

3 Classification LevelHumansDogs KingdomAnimalia PhylumChordata ClassMammalia OrderPrimataCarnivora FamilyHominidaeCanidae GenusHomoCanis Speciessapiensfamiliaris

4 Below Species Level Subspecies – Panthera tigris tigris (Bengal Tiger) – Panthera tigris sumatrae (Sumatran Tiger) – Panthera tigris altaica (Siberian Tiger) Race: Distinctive Variety of Species or Subspecies – Considered to Have Little Biological Meaning for Humans Variety, Strain, Breed, etc.

5 Molecular Techniques Are Revolutionizing Taxonomy “Five Kingdom” System – Animalia – Plantae – Protista (Single-Celled) – Fungi – Bacteria (No Cell Nucleus) Levels Above Kingdom – Bacteria are More Different Than Everything Else

6 Levels Above Kingdom What’s Bigger than a Kingdom? – Empire? No: Domain or Superkingdom Eukarya: Everything With a Cell Nucleus – Every Organism You Can See Monera (Bacteria) Archaea (Many are Extremophiles) Monera and Archaea outweigh and Outumber Us We Need Molecular Biology to Detect These Differences

7 Molecular Techniques Are Revolutionizing Taxonomy The Case of Crocodiles Ancient Egyptians Knew of Two Kinds of Crocodiles – Big, Dangerous Deep Water Crocodiles – Smaller, Near-Shore, “Less Dangerous” Genetic Studies Show They Were Right The Less Dangerous Ones Are More Closely Related to American Crocodiles

8 How many species are there? 62,000 Vertebrates (Half are Fish) A Million Insects (23,000 Fossil) 250,000 Other Invertebrates 300,000 Plants (280,000 Broad-Leaf Plants) Estimated Million Unknown 700 Dinosaurs (9,000 Living Reptiles) 70,000 Fossil Mollusks

9 Hot spots have exceptionally high biodiversity New Zealand Horn of Africa Southeast Asia-Indonesia Pacific Islands Caribbean Islands Mediterranean Caucasus California

10 11.2 How Do We Benefit From Biodiversity? All of our food comes from other organisms Living organisms provide us with many useful drugs and medicines Biodiversity provides ecological services Biodiversity also brings us many aesthetic and cultural benefits

11 11.3 What Threatens Biodiversity? Extinction is a natural process We are accelerating extinction rates Invasive Species Island ecosystems are particularly susceptible to invasive species What Can You Do? Don’t Buy Endangered Species Products

12 11.4 Endangered Species Management Hunting and fishing laws have been effective Legislation is key to biodiversity protection Recovery plans rebuild populations of endangered species – Predators Help Restore Biodiversity in Yellowstone Private land is vital in endangered species protection Endangered species protection is controversial Large-scale, regional planning is needed International wildlife treaties are important

13 11.5 Captive Breeding And Species Survival Plans Zoos can help preserve wildlife We need to save rare species in the wild – “Charismatic’ Species Reconstituting Extinct Organisms? – Critics: Focus on Preserving Present


Download ppt "Chapter 11 Biodiversity: Preserving Species. 11.1 Biodiversity And The Species Concept What is biodiversity? What are species? – Genetically Similar Organisms."

Similar presentations


Ads by Google