1 / 7

4.2.6 Case histories of Species and Natural Area

4.2.6 Case histories of Species and Natural Area. Wood Bison as an example of an endangered species whose conservation status has been improved by intervention. Wood Bison (WB):. 1800's: 60,000,000 total and 168,000 wood bison (WB) 1889 : 800 total and 550 WB

fawn
Télécharger la présentation

4.2.6 Case histories of Species and Natural Area

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 4.2.6 Case histories of Species and Natural Area

  2. Wood Bison as an example of an endangered species whose conservation status has been improved by intervention.

  3. Wood Bison (WB): • 1800's: 60,000,000 total and 168,000 wood bison (WB) • 1889 : 800 total and 550 WB • due to hunting (meat and hide) and disease? • First protective laws 1877-93 • 1925/28- 6673 diseased plains buffalo (PB) sent to WBNP (Wood Bison National Park) (1922) • infected WB and compromised their genetic integrity • ie PB X WB; the concern? Are there any "pure" WB • 1959/63- discovery of "pure" WB in WBNP • 37 WB are the ancestors of all "pure" WB • 1975-WB Recovery Programme • 1977-International Commercial Trade Prohibited under CITES (Convention on International Trade of Endangered Species) • 1979- classified as "endangered" by COSEWIC (Committee on the Status of Endangered Wildlife in Canada) • 1983- WBNP made a World Heritage Site by UNESCO • 1988- downgraded to "threatened" • 1990- Northern Diseased Bison Environmental Assessment Panel

  4. Threats- • 1. Disease-bovine tuberculosis/anthrax/bovine viral diarrhea • 2. Habitat Loss- advancement of agriculture/logging/ roads/ urbanization • 3. Genetic Diversity-are there pure WB left? Hybridization with PB. • Even if pure they came from only 37 individuals ie bottleneck effect. Therefore the dilemma between maintaining genetic integrity and increasing gene pool. • Predation: wolves and poachers • Domestication- further hybridization with PB and cattle-does not promote genetic integrity • Red Tape- prov. and fed. Gov't-env./resources/ agriculture • 1st Nations/ Interest Groups(Greenpeace) / Industries-logging/agriculture/tourism • International Agencies-UNESCO, WWF • Money required to study and protect WB

  5. Biological Significance of a Natural Area • Eg. Wood Bison National Park (WBNP)-1922 • -1983 WHS by UNESCO • location: Boundary between Alberta and Northwest territories. Wilderness area of Northern Boreal Plains- • Vegetation- white spruce/black spruce/prairie grasses species/sphagnum moss/meadows • Conservation value-WB/ whooping crane • Threats- contamination of "pure" WB by PB and cattle

  6. extermination of all bison to eliminate disease and start with fresh bison • drying up of delta due to Bennett Dam and climate • water quality of Peace River affected by pulp and paper mills upstream of park • changing water levels affect nesting sites of whooping crane • native land claims

More Related