10_Biodiversity1 - Announcements: Feb 20, 2012 Exam next...

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Exam next Wednesday (Feb 29) Announcements: Feb 20, 2012
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Biodiversity 1 and 2 Lecture Objectives: 1. Be introduced to the diversity of life on Earth 2. Understand the mechanisms of diversity loss 3. DeFne and give examples of how nature inspires science
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What is biological diversity? l the variety and variability among living organisms and the ecological complexes in which they occur z U.S. OfFce of Technology Assessment (1987)
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Scales or types of biological diversity: Genetic diversity - Amount of genetic variation within or among populations of a given species. Species diversity - The number of species in a given community. Community level diversity - Variation in species assemblages based on variation in habitat within an ecosystem type. Ecosystem level diversity - Variation in ecosystems across a landscape or region. What is biological diversity?
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Rarity: A species that is either very uncommon throughout its range, or its range is very small. Endemism: An endemic species occurs no where else. Most common on islands.
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Species are groups of interbreeding organisms. Biological Species Concept (E. Mayr) What is a species?
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Taxonomy : the study of types of organisms and their relationships. Linnaeus (1707-1778) originator of modern scientiFc classiFcation of plants and animals ClassiFcation ranked according to - similarity - common ancestry
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Scientifc Classifcation Kingdom K ing P hillip C an O rder F ried G reen S nails Phylum Class Order Family Genus Species Aves Chordata Animalia Haliaeetus leucocephalus Falconi±ormes Accipitridae
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The Kingdoms of Life Plants Animals Fungi Protists Bacteria Archaebacteria Organisms are classi±ed into groups based on how they make a living
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Bacteria Archaebacteria Prokaryotes: do not have membrane bound nucleus nor other organelles, are unicellular. The Kingdoms of Life Organisms are classiFed into groups based on how they make a living
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Animals Fungi Protists Eukaryotes: have membrane bound nucleus and other organelles, can be multicellular or unicellular. The Kingdoms of Life
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10_Biodiversity1 - Announcements: Feb 20, 2012 Exam next...

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