Download presentation
Presentation is loading. Please wait.
Published byRoman Garfield Modified over 3 years ago
1
Biodiversity C-6-3
2
Biodiversity - the sum of all genetically based org. in the biosphere
3
Other types of diversity ~ Ecosystem diversity - includes habitats, communities, and processes ~ Species diversity - # of dif. species in biosphere ~ Genetic diversity - all dif. forms of genetic info for all life forms on the planet!
4
Benefits * food * medicine - pain killers, antibiotics, heart drugs, anticancer drugs etc. * industrial products
5
Threats to biodiversity Human impact is #1
6
Threats to biodiversity 1.) Habitat alteration * land development splits habitats and destroys others *this makes the species that live there more fragile and open to harm from further change
7
Threats to biodiversity 2.) Demand for wildlife products * hunting has made some species extinct! * fur, meat, body parts thought to have medicinal qualities * most endangered species are now protected from hunting - but poaching continues to be huge problem
8
Threats to biodiversity 3.) Pollution - major factor is toxic compound accumulation - Biological magnification - fig. 6-16
9
Threats to biodiversity 4.) Invasive species - non-native species that reproduce rapidly due to lack of predators. ~ often overcrowd native species and overtake the habitat thus destroying or changing the ecosystem ex: zebra mussles - in Lake Erie - have pushed some species to near extinction!
10
Conservation Strategies *captive breeding programs at zoos *set aside land to protect certain ecosystems - parks/reserves * limiting hunting and fishing to certain seasons * imposing stricter laws against pollution and mining for natural resources
Similar presentations
© 2018 SlidePlayer.com Inc.
All rights reserved.
Convert doc file to ppt online Ppt on data collection methods in nursing Ppt on microsoft sharepoint 2010 Ppt on limits and continuity of several variables Ppt on synthesis and degradation of purines and pyrimidines are Ppt on synthesis and degradation of purines and pyrimidines dna Ppt on lower bound theory Ppt on multi sectoral approach on ncds Ppt on paper tablet pc Ppt on labour cost accounting