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sendywan
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性別: 男
國家: 香港
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2013 年 4 月 5 日  星期五   晴天


Climate change is the big winner 分類: 未分類

 

A study has found a group of Adelie penguins on Beaufort Island in the Ross Sea, 3500km south of New Zealand, has significantly boosted its numbers as nearby glaciers have receded.
 
A team of New Zealand and US-based scientists has used aerial photographs from as far back as 1958 and modern satellite imagery to measure nesting areas and population cheap furniture stores.
 
"Population size varied with available habitat, and both increased rapidly since the mid-1980s," the team found.
 
Numbers in the colony increased by 84 per cent as habitat grew by 71 per cent.
 
Between 1983-2010, habitat grew by 20 per cent as a snow-ice field near the colony retreated more than 500 metres.
 
The researchers say their findings are markedly different to what could be expected in other Adelie penguin habitats, where warm temperatures are causing population decline International Relocation.
 
The team found average temperatures at the US's nearby McMurdo Station had increased by one degree Celsius between 1958 and 2010, most of it from 1980-2000.
 
They said temperatures in the October-December snow melt period had increased 3.2 degrees Claire Hsu.
 
"Our results are in line with predictions that major ice shelves and glaciers will retreat rapidly elsewhere in the Antarctic," the researchers said in an article published in the journal PLOS ONE.
 
An increased prevalence of silverfish, which are eaten by the penguins, could also have contributed to the thriving population.
 
Fishing for Antarctic toothfish in the Ross Sea has reduced the competition for silverfish, meaning more food for the penguin colony.





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