Endangered species (Aj)

Téma prezentace: Endangered species

Typ souboru: prezentace PPTX

Přidal(a): Sindy Paganiková



Popis materiálu:

Prezentace na otázku z angličtiny Endangered species. Věnuje se obecné charakteristice ohrožených druhů, jejich ochraně a popisu konkrétního ohroženého druhu (u maturity stačí popsat jeden).



}Endangered species

}Sindy Paganiková, IV. B

}Endangered species

}Considered to be at risk of extinction

◦There are so few left of their kind that
they could disappear from the planet altogether

}Threatened by this factors:

◦Loss of habitat



◦Climate change

}Declining population or a very limited range

}Many species going extinct before they have even been discovered

}Third of the world’s amphibians, a quarter of all mammals and one in eight birds are endangered

}Endangered species

}Cause for concern for us all

◦They add beauty and wonder to the natural world

◦Great global economic importance

◦A great diversity of species maintains the ecosystems necessary to our existence by helping to regulate our climate and by providing:

–clean air and water



–building and clothing materials

–fertile soils

}The ARKive project

◦through the emotive power of wildlife films and photos is working to help raise the public awareness of the world’s endangered species

}Conservation status

}Indicates how great the risk is of that species becoming extinct in the near future

}IUCN Red List of Threatened Species = the most global and comprehensive system

◦Determines the conservation status of each species – assessed according to:

–How many individuals there are

–Whether this number is in decline

}Conservation status

}à They are then placed on a scale in
one of the following categories:


◦Extinct in the Wild

◦Critically Endangered



◦Near Threatened

◦Least Concern

◦Data Deficient

}Vulnerable, Endangered and Critically Endangered are considered to be at risk of extinction

◦20 222 from nearly 60 000 species assessed so far

}Why are species

}Animals and plants face a large number of different threats – many of them are a direct result of human activity

◦Loss of habitat and habitat fragmentation

◦Hunting and poaching

◦Invasive species

◦Climate change


◦Collection / pet trade


}What is being done to help endangered species?


◦Protect the natural world and sustain biodiversity

–Carefully preserving and managing existing habitats

–Restoring areas which have been damaged or degraded

◦Conservation outside a species’ natural habitat

–Caring for an endangered animal in captivity (e. g. zoo)

–Preserving endangered plants – seed banks

}Habitat preservation

◦Creation of national parks and marine protected areas

}Habitat restoration

◦Managing the land, removing invasive species and reintroducing native species

}Ex-situ conservation

◦Many endangered species are bred in captivity to preserve their numbers – sometimes it is possible to reintroduce them to the wild

◦Plant species – cultivated in nurseries and preserved in seed banks

}What is being done to help endangered species?

}Anti-poaching measures

◦Guards to protect endangered species from poachers

}Wildlife corridors

◦Where habitats have been fragmented by separations (roads, urban areas, farmland etc.), populations become isolated

◦Wildlife corridors help to reconnect habitat fragments and maintain genetic diversity

}Laws and policies

◦Some endangered species are protected by law or trade in them is restricted

◦CITES (The Convention on International Trade in Endangered Species of Wild Fauna and Flora) = international agreement between governments à trade in wild animal and plant specimens does not threaten their survival

}Polar bear

Basic informations

}Body length: 2,5 m

}Height at withers: 1,5m

}Speed: Walking = 3 – 6,5 km/h; Sprinting = 40 km/h

}Age: 20 – 25 years (record – 34years)

}Intelligence: as smart as apes

}Extremely well developed sense of smell

}Food: Ringed seal, vegetation, geese, bird eggs, caribou (polar reindeer), whales, walruses, narwhals

}Polar bear


}Arctic Circle

}Canada (home to 60% of the polar bears)

}The U.S. (Alaska)



}Norway (the Svalbard archipelago)

}About 20,000 to 25,000 polar bears

}19 populations of polar bears (4 are declining, 5 are stable, 1 is increasing, 9 have insufficient data)

}Polar bear

Why are they endangered?

}The U.S listed them as a threatened species under the Endangered Species Act (May 2008)

}Climate changes – Sea ice losses in the Arctic from global warming – loss of habitat

◦They depend on sea ice for hunting, breeding, and in some cases, denning

}Inuit communities – hunting for meat and fur (warm cloths) – carefully regulated by a quota system

◦Unregulated hunting ended in 1973 with an international agreement among the polar bear nations

}Polar bear

Why are they endangered?


◦Black soot (settle on arctic snow and ice)

◦Chemicals discharge from ships and factories in ocean

◦Modern synthetic chemicals (polychlorinated biphenyl) – weak immune system à greater threat from parasites and disease; reproduction failure and malformed organs

}Polar bear

}Information resources

}Endangered species fact file [online]. [cit. 2015-11-02]. Dostupné z: http://www.arkive.org/endangered-species/

}Polar Bear Facts & Information [online]. [cit. 2015-11-02]. Dostupné z: http://www.polarbearsinternational.org/aboutpolarbears/essentials