雅思阅读模拟练习题一篇_雅思英语阅读

雅思阅读模拟练习题一篇

　　Each park or reserve is an ecosystem, he says, and the larger reserves, such as those in Canada, may have several types of ecological subsystems within it. There are reserves which are half the size of Western Europe, so it doesnt make sense to talk about them as if they were all the same, or as if the microclimates within them were uniform. Woodward outlines some of the dangers posed by climatic change to parks in the northern Americas, for example.

　　If climatic change is severe, and in particular if the change is happening as quickly as it is at the moment, then the boundaries of the park no longer make much sense. A park that was designated as a protected area 90 years ago may suffer such change in its climate that the nature of it changes too. It will no longer contain the animal and plant life that it did. So the area which once protected, say, a species of reindeer or a type of scenery, will have changed. In effect, you lose the thing you were trying to protect. This effect has already been seen in Canada, where parks which once contained glaciers have seen the glaciers melted by global warming.

　　Jennie Lindstrom, Chief Executive Officer of H2O, the charity which campaigns on an international level on behalf of mainland Europes protected wetland and wilderness areas, is even more pessimistic. In a letter to Science Now, she has asserted that up to 70% of such areas are already experiencing such significant change ... in climate that the distribution patterns. of flora and fauna are changing, and that all areas will eventually be affected. She estimates that the most profound change is occurring in the northernmost parks in areas such as Finland, Greenland, Iceland and northern Russia, but adds that there is no place which will not suffer the effects of global warming. What we are seeing is a massive change in the environment - and that means the extinction of whole species, as well as visual and structural changes which means that areas like the Camargue may literally look totally different in 50 or 60 years time.