18 - ENDANGERED SPECIES READINGS FREEMAN 2005 Chapter 54...

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ENDANGERED SPECIES READINGS: FREEMAN, 2005 Chapter 54 Pages 1272-1283
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EXTINCT AND ENDANGERED SPECIES Extinction is a process that has been going on since the origin of life on earth. Current concerns over the rate of extinction is that it has increased dramatically due to human activity. It is estimated that since 1600, about 2.1 % of the world’s mammal species and 1.3% of its bird species have gone extinct. Endangered species are those who’s numbers are small or rapidly declining but still have a chance of avoiding extinction if humans act.
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N. A. Extinctions in the Past Extinction is a natural process. The rate of occurrence prior to the present was largely related to climate change (glaciations). Recent rates largely due to human activities have increased the rate at least ten fold over the average for the past 25,000 years.
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EXTINCT AND ENDANGERED SPECIES TAXON EXTINCT (%) ENDANGERED (%) Mammals 85(2.1) 505 (11) Birds 113(1.3) 1,029(11) Reptiles 21(0.3) 167(3) Amphibians 2(0.1) 59(2) Fishes 23(0.1) 452(2) Invertebrates 98(0.01) N.A. Flowering Plants 384(0.2) 21,895(9)
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EXTINCT BIRD SPECIES A number of bird extinctions have occurred on islands where human populations grew rapidly and adopted modern forms of agriculture. New Zeeland and Hawaii have experienced a had a number of extinct bird species.
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Extinction of Passenger Pigeon One of the most abundant birds east of the Rocky Mountains, who’s populations may have ranged between 1 and 4 billion. Bred in large colonies; one egg laid per season. Last nesting birds in Great Lakes region in 1890’s. Last individuals shot in Babcock, WI in 1889 and Pike County, OH in 1900. Last survivor died at 1pm on 9-1-14 in Cincinnati Zoo. Stuffed Specimen
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Extinction of Dusky Seaside Sparrow A non-migratory subspecies of the seaside sparrow found in marshes of Merritt Island and along the St.
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