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Photos: ten beloved species threatened by global warming
Jeremy Hance
mongabay.com
December 14, 2009


The International Union for the Conservation of Nature (IUCN) has released a list of ten species that are likely to be among the hardest hit by climate change, including beloved species such as the leatherback sea turtle, the koala, the emperor penguin, the clownfish, and the beluga whale. The timing of the list coincides with the negotiations by world leaders at the UN Climate Change Conference to come up with an international agreement to combat climate change.

"Humans are not the only ones whose fate is at stake here in Copenhagen – some of our favourite species are also taking the fall for our CO2 emissions," report co-author Wendy Foden said in a press release. "This report should act as a wake-up call to governments to make real commitments to cut CO2 emissions if we are to avoid a drastically changed natural world. We simply don’t have the time for drawn-out political wrangling. We need strong commitments and we need them now."

The report also highlights the plight of the staghorn coral, salmon, ringed seal, arctic fox, and the quiver tree. The report doesn't include the polar bear since most people are already aware of the threat climate change poses to the world's largest bear.


The ringed-seal. Photo by: Kit M. Kovacs and Christian Lydersen.
Much like the polar bear, the ringed seal is threatened by ice melt in the Arctic. Ringed seals require ice for breeding and rearing young. In the spring they need at least six weeks of stable ice in the spring to milk their newborn cubs.

Below the ice, beluga whales are seen as indirectly threatened by warmer seas. A warmer Arctic is likely to bring more humans and more ships which will negatively impact the beluga whale through noise, pollution, and collisions with ships. Global warming could also bring the beluga whale in greater contact with its natural hunter, the killer whale. Beluga whales are currently listed as Near Threatened by the IUCN Red List.

Also in the Arctic, climate change is putting pressure on Arctic fox. With warming temperatures the fox's tundra habitat is being invaded by new plants, eventually the tundra could be replaced by boreal forests, putting the Arctic fox in direct competition with its larger cousin, the red fox, with drastic consequence, since there is evidence of the red fox killing both young and adult Arctic foxes.

On the other end of the world, in the frigid Antarctic, emperor penguins are threatened by the loss of stable sea ice platforms for young chicks and moulting adults. A rise in 2 degrees Celsius would likely impact 40 percent of emperor penguin's total population. Conservationists also fear that the penguin's food source, Antarctic krill, will be diminished by warmer temperatures.


The clownfish. Photo courtesy of the IUCN.
North of the Antarctic, on the endemic-rich continent of Australia, koalas are also suffering from the heat. Rising CO2 levels have caused Eucalyptus leaves, the koala's only food, to decline in nutrients. Increased incidences of bushfires and droughts are also likely to hurt koala populations.

Ocean species are hardly immune from climate change. Corals, such as staghorn corals, are particularly susceptible. Rising temperatures are known to cause a phenomenon of coral bleaching, which can lead to increased propensity incidence of disease and even mass-mortality in coral reefs. In addition, ocean acidification, caused by higher concentrations of CO2 in the ocean, can weaken coral skeletons.

Bright orange with white-stripes, the ocean's famous clownfish are threatened by the widespread coral reef decline. Dependent on the sea-anemones which are found in biodiversity-rich coral reefs, clownfish would likely not survive in a world without anemones. In addition, ocean acidification has been shown to upset clownfish's ability to navigate, especially among juveniles.


The Arctic fox. Photo by: Örvar Atli Þorgeirsson.
The world's largest marine turtle is also threatened by climate change. Since the leatherback marine turtle's sex is determined by the temperature of the sand in which their mothers' lay the eggs, warmer temperatures are likely to increase the number of male leatherback turtles, upsetting the natural balance. Rising sea levels may also wash away important—and increasingly rare—nesting beach for the turtle. The leatherback is already listed as Critically Endangered by the IUCN Red List.

Salmon's ability to move from the ocean to freshwater rivers en masse has made them sensitive to even small environmental changes, let alone massive habitat upheaval from global warming. Warmer temperatures in the ocean and in freshwater ecosystems may upset the important timing of the salmon's migration, as well, warm freshwater can act as a barrier to migrating salmon, forcing them to migrate further and expend more energy. Less snow in the winter may also decrease the flow of important salmon rivers.

Even desert species are feeling the heat. Although the quiver tree inhabits some of the Africa's driest and hottest habitats, it is threatened by increasing drought. This large, slow-growing tree is undergoing sever drought-stress in parts of its range. Conservationists fear that the trees in the drought zones will not be able to migrate to other ranges, leaving remaining populations genetically deficient.

"Ordinary people are not powerless to stop these tragic losses," Simon Stuart, Chair of IUCN’s Species Survival Commission, said in a press release. "They can cut down on their own CO2 emissions and voice their support for strong action by their Governments to change the dire climate prognosis we are currently facing."




Beluga whale. Photo by: Bill Liao.




Adult emperor penguin feeding chick. Photo by: Ty Hurley.




Leatherback sea turtle. Photo by: Brian J. Hutchinson.




Salmon. Photo by: Anita Scharf.




Koala. Photo by: Daniele Sartori.




Staghorn coral thicket. Photo by: L. De Vantier.




Quiver tree. Photo by: Wendy Foden.







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Jeremy Hance
mongabay.com (December 14, 2009). Photos: ten beloved species threatened by global warming. http://news.mongabay.com/2009/1214-hance_ten.html



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