Ch55 part2 - Chapter 55 Conservation Biology and...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

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

Unformatted text preview: Chapter 55 Conservation Biology and Restoration Ecology Another distinguishing feature of Conservation Biology is its time scale Practitioners attach more weight to the long-range viability of whole systems and species, including their evolutionary potential Conservation Biology differs from other biological sciences in one important way Its often a crisis discipline i.e., one often has to act before knowing all the facts thus, a mixture of science and art. Conservation Biologists view their main task as providing the intellectual and technological tools that will anticipate, prevent, minimize, and repair ecological damage Multidisciplinary approaches. Many of the ideas, techniques and methods come from a broad range of biological fields including ecology, biogeography, systematics, genetics, evolution, epidemiology, forestry, fisheries, wildlife biology, agronomy, and veterinary science Also incorporates social science disciplines such as resource economics and policy, ethnobiology, and environmental ethics When did conservation biology emerge as a science? Conservation biology only emerged as a distinct professional enterprise with its own practices, cultures, and social institutions in the 1980s. It is possible not only to place and date, but even to time, its emergence as an organized discipline: at about 5 p.m. (EST), 8 May 1985, in Ann Arbor, Michigan, at the end of the Second Conference on Conservation Biology. What do conservation biologist do? Conservation Biology The primary goal of Conservation Biology is the active protection of biological diversity or biodiversity . Scientists have described and formally named about 1.8 million species of organisms. Species estimates varies : 1.8 million to high as 200 million. Why do we need to conserve? Over the past few hundred years, humans have increased the species extinction rate by as much as 1,000 times more than the typical rate over the planets history. Greatest episode of mass extinctions since the loss of the dinosaurs 65 million years ago Contemporary extinction rates 1000-10,000 times higher than the rate expected without human influence (Wilson1989). The biodiversity crisis Earths biodiversity The Earth is home to a tremendous biological diversity, or biodiversity, as a result of more than 3 billion years of evolution. wild life The Three Levels of Biodiversity Biodiversity has three main components 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 Mutation and sexual recombination produce the variation that makes evolution possible Genetic Diversity (Chapter 23.1) Basics on genetics Each gene appears at a certain location on a certain chromosome, and there are two copies of the gene....
View Full Document

This note was uploaded on 10/21/2009 for the course BIOL 6C taught by Professor Sundram during the Spring '09 term at DeAnza College.

Page1 / 59

Ch55 part2 - Chapter 55 Conservation Biology and...

This preview shows document pages 1 - 12. Sign up to view the full document.

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