Lecture17BILD

Lecture17BILD - Conservation Why conserve biodiversity?...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Conservation • Why conserve biodiversity? • Levels of biodiversity • Threats to biodiversity • Conservation science: application of our understanding of biological systems • Conservation Science integrates the following fields to conserve biological diversity at all levels Ecology Evolutionary biology Physiology Molecular biology Genetics Behavioral ecology Lets not forget economics, political science, urban and rural planning, etc. Why conserve?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Benefits of Species and Genetic Diversity • Many pharmaceuticals – Contain substances originally derived from plants Figure 55.4 This periwinkle from Madagascar is the source of a cancer treatment • Gila monster saliva contains a compound that binds to insulin receptors, making them more sensitive to insulin • This compound was the inspiration for exenatide, now approved for treatment of type II diabetes. Dr. John Eng DNA polymerase from the bacteria Thermus aquaticus from Yellowstone • Helped spawn the biotech industry • Is used every day in research laboratories for medical and other discoveries
Background image of page 2
3 (a) The sea star Pisaster ochraceous feeds preferential y on mussels but wil consume other invertebrates. With Pisaster (control) Without Pisaster (experimental) Number of species present 0 5 10 15 20 1963 ´64 ´65 ´66 ´67 ´68 ´69 ´70 ´71 ´72 ´73 (b) When Pisaster was removed from an intertidal zone, mussels eventual y took over the rock face and eliminated most other invertebrates and algae. In a control area from which Pisaster was not removed, there was lit le change in species diversity. Key Species • Without them, community may collapse The lesser long-nosed bat pollinates the cardon cactus, a dominant feature of the landscape of Baja California and parts of Sonora Ecosystem Services
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 • Ecosystem services include – Purification of air and water – Detoxification and decomposition of wastes – Cycling of nutrients – Moderation of weather extremes – Pollination – And many others • We get these services for free. Should we charge for their removal? • How do we place a value on such services, such that we can place a cost on their destruction? Biophilia • Love for biology (can you feel the love or do you just want this quarter to end?) • Humans have developed in close contact with biological diversity • Its loss and homogenization will be, for humans, akin to losing art and music and cultural diversity from the human experience • However, biophilia may eventually motivate a realignment of our environmental priorities Three Levels of Biodiversity – Genetic diversity – Species diversity – Ecosystem diversity Genetic diversity in a vole population Species diversity in a coastal redwood ecosystem Community and ecosystem diversity across the landscape of an entire region Figure 55.2
Background image of page 4
5 Four Major Threats to Biodiversity • Most species loss can be traced to four major threats – Habitat destruction – Introduced species
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/12/2011 for the course BILD 3 taught by Professor Wills during the Fall '07 term at UCSD.

Page1 / 19

Lecture17BILD - Conservation Why conserve biodiversity?...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online