3.
DOHA (AFP) - The destruction of natural habitats in Europe is wiping out butterfly, beetle and dragonfly species across the region, the updated European "Red List" of endangered species showed Tuesday.
Scientists examining Europe's 435 butterfly species found that the populations of one in three species are falling and nine percent are already threatened with extinction.
"For example, the Madeiran large white butterfly is seriously endangered, having not been seen on Madeira for at least 20 years," International Union for the Conservation of Nature (IUCN) said.
"Most butterflies at risk are in southern Europe," said Annabelle Cuttelod, coordinator of the European Red List at IUCN.
"Their main threat is habitat loss, most often caused by changes in agricultural practices. Climate change, forest fires and the expansion of tourism make the situation even worse."
Cutting trees has led to a decrease in the population of some beetle species that depend on decaying (腐烂的) wood. Known as saproxylic beetles(食腐甲虫), they play an important role in ecosystems by recycling nutrients.
Some 11percent or 46species of them are at risk of being lost from the region, while seven percent are threatened with extinction worldwide.
"The main long-term threats to saproxylic beetles are habitat loss due to logging and the decrease in the number of mature trees," said the IUCN.
For dragonflies, it is the overuse of freshwater resources that is causing these species to drop in numbers. Five percent of dragonfly species are threatened with global extinction, while some 11 percent are considered to be threatened within Europe.
"Increasingly hot and dry summers combined with overuse of water for drinking and agriculture are causing the dragonflies' wetland habitats to dry up," said the IUCN.
(1) What is true for Europe's butterfly species? ______
A. The populations of more than 435 butterfly species are shrinking.
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B. About 40butterfly species in Europe are in danger of dying out.
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C. Eastern Europe is in more danger of losing the butterfly species.
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D. The Madeiran large white butterfly has been living on Madeira for more than 20years.
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(2) What is the main cause of habitat loss of butterflies in Europe? ______
A. Climate change.
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B. Changes in agricultural practices.
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C. Environmental pollution.
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D. The expansion of tourism.
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(3) How many species of beetles feeding on decaying wood are threatened with extinction worldwide? ______
A. About 7.
| B. About 11.
| C. About 15.
| D. About 29.
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(4) The main threat facing the dragonflies is ______ .
A. the lack of fresh water resources
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B. the decreased number of mature trees
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C. agricultural practices
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D. the hot and dry weather
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(5) We may learn from the passage that ______ .
A. European "Red List" has nothing to do with IUCN.
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B. dragonfly species are well protected in other parts of the world
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C. wildlife is generally well protected in Europe
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D. the disappearance of natural habitats is largely due to human activities |