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英格兰改善水质显成效 各郡均有水獭重现

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小编摘要:日前在英格兰肯特郡发现两只水獭。自此水獭这种曾濒临灭绝的动物已经在英格兰所有县市显露踪迹。这一景象的出现和当地水质的改善不无关系。

导读:日前在英格兰肯特郡发现两只水獭。自此水獭这种曾濒临灭绝的动物已经在英格兰所有县市显露踪迹。这一景象的出现和当地水质的改善不无关系。

由于有毒农药的使用曾危害水獭的健康并减少了水獭所赖以生存的鱼类的数量,七十年代水獭数量一度急剧下降,几近灭绝。环保部门表示,水獭的重现表明英格兰的水质改善工作已经成效显著,目前英格兰的水质已经达到了20年来的最好状态,使得许多水生动植物在工业革命后第一次回归到这里的河流中来。

英格兰东南部水质的恢复相对较慢,曾有环境专家预计肯特郡十年内还是不会有水獭出现。这次两只水獭的现身是对英格兰环保部门付出努力的极大褒奖。 

Two otters have been seen in Kent, signalling their return to every English county following efforts to save them from extinction.

Kent was the only county found without otters in a survey of rivers across England carried out by the Environment Agency (EA) last year.

Since then at least two otters have been spotted, with holts on the Medway and Eden rivers, the EA said.

A survey on the Ribble in Lancashire showed a 44% increase since 2008.

Otter numbers fell as a result of toxic pesticides, which damaged their health and reduced their supplies of fish. They had almost disappeared from England by the 1970s.

'Great success'

Improvements in water quality, along with legal protection, has helped their recovery.

"The recovery of otters from near-extinction shows how far we've come in controlling pollution and improving water quality," said the EA's national conservation manager, Alastair Driver.

"Rivers in England are the healthiest for over 20 years and otters, salmon and other wildlife are returning to many rivers for the first time since the Industrial Revolution.

"The fact that otters are now returning to Kent is the final piece in the jigsaw for otter recovery in England and is a symbol of great success for everybody involved in otter conservation."

The otter survey of England, which examined 3,327 river sites between July 2009 and March 2010, showed the number of places with evidence of otter life had increased tenfold in 30 years.

But recovery was slowest in the South East, with conservationists predicting otters may not be resident in Kent for another 10 years.

Their return was also a "fantastic reward" for efforts by the agency to improve water quality, said Mr Driver.

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2011-08-18 15:26 编辑:claudiaenglish
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