Chapter 58 conservation biology
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Chapter 58 Conservation Biology. Biology 101 Tri-County Technical College Pendleton, SC. Human Impact. Accelerating pace of human-caused extinctions raises serious questions about future of biological diversity on Earth

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Chapter 58 Conservation Biology

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Chapter 58 conservation biology

Chapter 58 Conservation Biology

Biology 101

Tri-County Technical College

Pendleton, SC


Human impact

Human Impact

  • Accelerating pace of human-caused extinctions raises serious questions about future of biological diversity on Earth

  • Conservation biology is scientific study of how to preserve diversity of life

  • Estimated extinctions range from 10% to 50% by 2050

    • Hawaii, New Zealand, North America, Australia, and on and on


Extinctions

Extinctions

  • Over 50% of all medicines contain natural plant or animal product

  • Extinctions deprive us of opportunity to study ecological relationships among organisms

  • Aesthetic pleasure

  • Continents versus islands

  • Rare species versus common species


Most important factor

Most Important Factor

  • Habitat loss most important contributing factor to extinctions in U.S.

  • Traditional versus “sun-grown” coffee plantations

  • Introduced pests, predators, and competitors have eliminated many species

  • Overexploitation driven many to extinction

    • passenger pigeon; Steller’s sea lion


News not getting any better

News not getting any better…

  • Elephants and rhinoceroses

  • Orchids, parrots, reptiles, and tropical reef fishes

  • Loss of mutualists threaten some species

    • Plants and pollinators

  • Global warming threatens some species

  • > of only 1oC will shift temperature range 150 km north


Warning warning

Warning…warning

  • Estimates are for a 2-5 degree C shift

  • Care to move 300-750 km north?

  • New climates will appear and old climates will disappear

  • We can make a difference but we must choose NOW!!

  • Design recovery plans


Better to light a candle

Better to light a candle…

  • Captive propagation

  • Establishing parks and preserves

  • Restoring degraded ecosystems

  • Use less, reuse, recycle, and reclaim

  • Markets and conservation

  • Biodiversity from scientific, economic, and ethical point of view

    • We lose just one…any one…and we all suffer


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