UNCP BIO 4320 - Overexploitation, Exotic Species, and Disease

Unformatted text preview:

1 Ch4b: Overexploitation, Exotic Species, and Disease Species may be threatened even when habitat is intact Overexploitation is driven by globalization & technology Exotic species & diseases are widespread I. Overexploitation A. What is it? 1. overharvesting species 2. threatens endangered vertebrates B. Humans are ecologically efficient predators 1. traditional societies 2. globalization of markets 3. pets, décor, ornamentals 4. technology C. Particularly evident in oceans 1. many animals killed as “bycatch” 2. maximum sustainable yields may be unrealistic 3. overfished marine organisms 1946 – 1974 -- 1986 – D. Solutions? 1. regulations & CITES 2. national parks & nature reserves 3. link conservation & local economies. II. Exotic species A. Introduced accidentally or deliberately 1. desirable traits 2. repeat offenders: 3. most introductions are not successful 4. few exotics will harm their new environ. B. Introduction facilitated by2 1. loss of density-dependent factors 2. human altered environ. 3. “weedy” traits C. Impacts on native biota? 1. competition 2. predation 3. environmental degradation D. Endangered species in foreign lands E. Natives may become pests F. Few places free of exotics G. Islands are particularly vulnerable III. Spread of disease via A. Crowding B. Poor health from malnourishment C. Contact with domestic animals D. Human travel E. Global climate


View Full Document

UNCP BIO 4320 - Overexploitation, Exotic Species, and Disease

Download Overexploitation, Exotic Species, and Disease
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Overexploitation, Exotic Species, and Disease and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Overexploitation, Exotic Species, and Disease 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?