Chapter 38 pt 1

Chapter 38 pt 1 - 0 Chapter 38 Conservation Biology We are...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 38 0 We are now living through a biodiversity crisis A rapid decrease in Earth’s great variety of organisms 6 th mass extinction event in Earth’s history Conservation Biology
Background image of page 1

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

View Full DocumentRight Arrow Icon
Biodiversity is the variety that exists in living organisms Conservation biology Area of science that studies ways to counter the biodiversity crisis Preserve species Protect habitats and ecosystems Reverse habitat loss
Background image of page 2
Human activities alter the processes that an ecosystem depends on Trophic structure Energy flow Chemical cycling Natural disturbances These alterations push species towards extinction By the end of the century it is estimated that over half of all currently living plant and animal species will be extinct
Background image of page 3

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

View Full DocumentRight Arrow Icon
Biodiversity is vital to human welfare Provides food, clothing, shelter, oxygen, medicines, and ecosystem services 25% of all prescriptions are plant based Rosy periwinkle treats cancer Rosy periwinkle is native to Madagascar 8000 species of flowering plants many not studied yet Madagascar has lost 80% of its forests and 50% of its native species!
Background image of page 4
Three levels of biodiversity Genetic diversity Essential for evolution and adaptation to the environment Species diversity Ecosystem diversity Most of biodiversity focuses on species diversity Endangered species In danger of extinction throughout all or a significant portion of it’s range Threatened species Species likely to become endangered in the foreseeable future
Background image of page 5

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

View Full DocumentRight Arrow Icon
Human activities Threaten diversity at all levels Percentage of animals either extinct
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/30/2010 for the course BIOS 101 taught by Professor Plantz during the Spring '08 term at UNL.

Page1 / 25

Chapter 38 pt 1 - 0 Chapter 38 Conservation Biology We are...

This preview shows document pages 1 - 7. Sign up to view the full document.

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