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BioDiversity Lions and Tiger Lillies and Bacteria.

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Presentation on theme: "BioDiversity Lions and Tiger Lillies and Bacteria."— Presentation transcript:

1 BioDiversity Lions and Tiger Lillies and Bacteria

2 What you should be able to do  Describe the diversity of species types on Earth, relating the difference between known numbers and estimated numbers  List and describe 3 levels of biodiversity  Explain four ways in which biodiversity is important to ecosystems and humans  Analyze the potential value of a single species  Key Terms: biodiversity, gene, keystone species, ecotourism

3 Biodiversity-What is It?  Biodiversity is short for “biological diversity” and refers to the number and variety of different species in a given area.  Humans need to understand and preserve biodiversity for our own survival  Tropical rainforest contain an extraordinary variety of species, scientists are still discovering new species everyday.

4 Information Check  Biodiversity means  A. Biological diversity and refers to the number and variety of different species in a given area  B. Number and kinds of ecosystems on the planet  C. Number and kinds of geologic land forms in illinois

5 The Answer is A  Biological diversity and refers to the number and variety of different species in a given area

6 Known vs Unknown Diversity  The number of known species on earth is approx. 1.7 million.  The most abundant group of organisms are insects  The actual number of species on earth is unknown.  The accepted number of known and unknown species on earth is 10 million 10/29/2009  An organisms is considered to be “known” when it has been collected and described scientifically.  Most unknown species exist in hard to explore areas.

7 3 Levels of Biodiversity  1. Species Diversity-all the differences between populations of species as well as between species Ex. Gray squirrels in IL. and Wis.  2. Ecosystem Diversity-variety of habitats, communities between ecosystems Ex. Grasslands in IL and Grasslands in Kenya  3. Genetic Diversity-variety of all the different genes-pieces of DNA that code for a trait contained in all the members of a population of a species Ex. Monarch butterflies with more orange and those with less orange coloration.

8 Information Check  What are the 3 levels of Biodiversity?  1. Species  2. Ecosystem  3. Genetic

9 4 Benefits of Biodiversity 4 Benefits of Biodiversity 1.Biodiversity is connected to Ecosystem Health Every species is either dependent on or depended upon by at least one other species. When one species disappears a strand in the food web is removed. Species that are critical to the function of an ecosystem is a Keystone species. Ex. Loss of wolves led to explosion of deer population in Illinois 2.Genetic Variety increases the chances that species will survive environmental changes. When populations shrink, genetic diversity decreases. 3.Scientific community continues to find new uses for biological material for food, clothing and medicine Ex. Clothing made from sustainable crops such as flax, Taxol an anticancer drug derived from the North American Pacific Yew Tree. Cultivation of new varieties of Corn-North America, Wheat-Africa, Rice-India 4. Value biodiversity because we enjoy green spaces and undisturbed land. Ex. Ecoturism- a form of tourism that supports conservation and sustainable development of ecolologically unique area-Tours of the Grand Canyon

10 Information Check  Explain four ways in which biodiversity is important to ecosystems and humans  1.  2.  3.  4.

11 Biodiversity Lab Owl Pellet Dissection  In teams of 2 you are going to examine Barn Owl Pellets-the expelled undigested portions of consumed animals, that owls have consumed.  This activity is to help you understand the dependence relationships of organisms in ecosystems.  You will match the bones of the consumed animals against a chart to identify what the owl ate and then answer the questions on the handout. Glue the bones to the chart, place any unmatched bones in your plastic bag.

12 Homework-Due 4-20 and 4-21  A. Create a concept map using the main ideas and the key terms from the PowerPoint and information from each section from chapter 10 section 1. Due 4-20  B. Create a food chain with a producer, primary, secondary and tertiary consumer then predict what the consequences will be to the chain and ecosystem if one of the links is removed. Due 4-21  C. Prepare an argument to convince someone that they should care about biodiversity-Due 4-24

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