103 extinction - OUTLINE: EXTINCTION • 1. EXTINCTION...

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Unformatted text preview: OUTLINE: EXTINCTION • 1. EXTINCTION RATES. • 2. DIFFICULT TO STUDY. • 3. GENERAL CAUSES OF EXTINCTION. • 4. EXAMPLE. Suggested reading: Primack, R. 2008. Primer of conservation biology. Sinauer Associates. Parejko, K. 2003. Pliny the Elder & first recorded extinction. Conservation Biology 17:925-927. DEFINITIONS • GLOBAL EXTINCTION – PERMANENT LOSS THROUGHOUT RANGE. • LOCAL EXTINCTION - LOSS FROM A REGION, BUT NOT EVERYWHERE Gray wolves are not globally endangered. EXTINCTION RATES • HISTORICAL RATES (FROM FOSSIL RECORD): • ______________________________. • CURRENT RATES (FROM HABITAT AREA LOSS): • ______________________________. EXTINCTION RATES • THIS SUGGESTS: • CURRENT EXTINCTION RATES ARE ABOUT ________ HIGHER THAN HISTORIC RATES. • BIG NUMBER PROBLEM: ___________ _________________________________ _ WHY IS EXTINCTION HARD TO STUDY? • EXAMPLE: PASSENGER PIGEON SECOND EXAMPLE: • GREAT AUK • Coastal species related to puffins • Flightless • Used by fishermen for fresh food. ESTIMATING EXTINCTION...
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This note was uploaded on 02/26/2012 for the course FNR 103 taught by Professor Staff during the Fall '08 term at Purdue University.

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103 extinction - OUTLINE: EXTINCTION • 1. EXTINCTION...

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