Ch 55 - Chapter 55 Conservation Biology Levels of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 55 - Conservation Biology Levels of Biodiversity 0. Genetic Diversity 0. Are Chesapeake and Louisiana oysters the same? 1. Species Diversity 1. higher risk for aquatic species 2. 1/2 of diversity gone by 2100 2. Ecosystem Diversity 3. Rain forest area ~ Continental U.S., loosing area size of W. Virginia each year 4. Ecosystem services (diversity, air/water quality) valued at 33 trillion per year Major threats to Biodiversity 1) Habitat destruction 5. 93 % of coral reefs damaged 6. Habitat fragmentation 2) Introduced species 7. responsible for 40 % of extinctions since 1750 8. Kudzu, fire ants good examples 3) Over exploitation 9. African elephant 10.Atlantic cod 11.increased hunting makes population vulnerable 4) Disruption of food chains Figure 55.15 Amazon rain forest fragments Fragments decrease overall diversity Edge species increase, interior species decline Conservation Biology 0. Extinction vortex-- decreased numbers cause drift and inbreeding which further decrease numbers
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/02/2009 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

Page1 / 4

Ch 55 - Chapter 55 Conservation Biology Levels of...

This preview shows document pages 1 - 2. Sign up to view the full document.

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