文章内容 英语听力练习 | 第一段：讲bamboo对生态中其他生物的重要性 第二段：现阶段我们对于bamboo的品种了解状况的限制，以及现在对bamboo的研究到了怎样的程度 第三段：bamboo在森林中所起的作用 第四段：bamboo的各种经济价值 第五段：讲bamboo受灭绝威胁主要是因为栖息地的破坏而非其他物种入侵carry是什么意思 model是什么意思第六段：提议重视bamboo，概述了一下bamboo的重要性 |
题型分布与答案参考 | 段落信息匹配题7，人名观点匹配4，简答题2 参考答案： 段落信息匹配 1.E an asssment of current limited extent of existing rearch about bamboo 2.D a comparison between bamboo and more fragile plants 眼影怎么画3.B details of the commercial application of bamboo 4.A a human development that is threatening the availability of bamboo 5.D a description of human activity that damaged large areas of bamboo 6.C examples of the approaches ud to study bamboo 7.B an explanation of how bamboo may help the survival of a range of plants 8-11待补充 简答题 12.问bamboo对生态的什么control起到很重要作用。soil erosion 13.问现在bamboo一个increasing trend是被用来做什么。paper （答案仅供参考） |
相关拓展 | Bamboo, a wonder plant The wonder plant with an uncertain future: more than a billion people rely on bamboo for either their shelter or income, while many endangered species depend on it for their survival. Despite its apparent abundance, a new report says that species of bamboo may be under rious threat. A Every year, during the rainy ason, the mountain gorillas of Central Africa migrate to the foothills and lower slopes of the Virunga Mountains to graze on bamboo. For the 650 0r so that remain in the wild, it’s a vital food source. Although there are at almost 150 types of plant, as well as various incts and other invertebrates, bamboo accounts for up t0 90 percent of their diet at this time of year. Without it, says Ian Redmond, chairman of the Ape Alliance, their chances of survival would be reduced significantly. Gorillas aren’t the only locals keen on bamboo. For the people who live clo to the Virungas, it’s a valuable and versatile raw material ud for building hous and making houhold items such as mats and baskets. But in the past 100 years or so, resources have come under increasing pressure as populations have exploded and large areas of bamboo forest have been cleared to make way for farms and commercial plantations. B Sadly, this isn’环雅官网t an isolated story. All over the world, the ranges of many bamboo species appear to be shrinking, endangering the people and animals that depend upon them. But despite bamboo’s importance, we know surprisingly little about it. A recent report published by the UN Environment Programme (UNEP) and the Inter-national Network for Bamboo and Rattan (INBAR) has revealed just how profound is our ignorance of global bamboo resources, particularly in relation to conrvation. There are almost l,600 recognized species of bamboo, but the report concentrated on the l,200 or so woody varieties distinguished by the strong stems, or culms, that most people associate with this versatile plant. Of the, only 38 ‘priority species’ identified for their commercial value have been the subject of any real scientific rearch, and this has focud mostly on matters relating to their viability as a commodity. This problem isn’t confined to bamboo. Compared to the work carried out on animals, the science of asssing the conrvation status of plants is still in its infancy. “People have only started looking hard at this during the past 10-15 years, and only now are they getting a handle on how to go about it systematically,” says Dr. Valerie Kapos, one of the report’s authors and a nior advir in forest ecology and conrvation to the UNEP. C Bamboo is a type of grass. It comes in a wide variety of forms, ranging in height from 30 centimetres to more than 40 metres. It is also the world’s fastest-growing woody plant; some species can grow more than a metre in a day. Bamboo’s ecological rote extends beyond providing food and habitat for animals. Bamboo tends to grow in stands made up of groups of individual plants that grow from root systems known as rhizomes. Its extensive rhizome systems, which tie in the top layers of the soil, are crucial in preventing soil erosion. And there is growing evidence that bamboo plays an important part in determining forest structure and dynamics. “Bamboo’s pattern of mass flowering and mass death leaves behind large areas of dry biomass that attract wildfire,” says Kapos. “When the burn, they create patches of open ground within the forest far bigger than would be left by a fallen tree.” Patchiness helps to prerve diversity becau certain plant species do better during the early stages of regeneration when there are gaps in the canopy. D However, bamboosophie moon’s most immediate significance lies in its economic value. Modern processing techniques mean that it can be ud in a variety of ways, for example, as flooring and laminates. One of the fastest growing bamboo products is paper-25 percent of paper produced in India is made from bamboo fiber, and in Brazil, 100,000 hectares of bamboo are grown for its production. Of cour, bamboocarat’s main function has always been in domestic applications, and as a locally traded commodity it’s worth about $4.5billion annually. Becau of its versatility, flexibility and strength (its tensile strength compares to that of some steel), it has traditionally been ud in construction. Today, more than one billion people worldwide live in bamboo hous. Bamboo is often the only readily available raw material for people in many developing countries, says Chris Stapleton, a rearch associate at the Royal Botanic Gardens. “Bamboo can be harvested from forest areas or grown quickly elwhere, and then converted simply without expensive machinery or facilities,” he says. “In this way, it contributes substantially to poverty alleviation and wealth creation.” E Given bamboo’s value in economic and ecological terms, the picture painted by the UNEP report is all the more worrying. But keen horticulturists will spot an apparent contradiction here. Tho who’ve followed the recent vogue for cultivating exotic species in their gardens will point out that if it isn’t kept in check, bamboo can cau real problems. “In a lot of places, the people who live with bamboo don’t perceive it as being endangered in any way,”bottom什么意思 says Kapos. “In fact, a lot of bamboo species are actually very invasive if they’ve been introduced.” So why are so many species endangered? There are two parate issues here, says Ray Townnd, vice president of the British Bamboo Society and arboretum manager at the Royal Botanic Gardens. “Some plants are threatened becau they can’t survive in the habitat-they aren’t strong enough or there aren’t enough of them, perhaps. But bamboo can take care of itlf-it is strong enough to survive if left alone. What is under threat is its habitat.” It is the physical disturbance that is the threat to bamboo, says Kapos. “When forest goes, it is converted into something el: there isn’t anywhere for forest plants such as bamboo to grow if you create a cattle pasture.” F Around the world, bamboo species are routinely protected as part of forest eco-systems in national parks and rerves, but there is next to nothing that protects bamboo in the wild for its own sake. However, some small steps are being taken to address this situation. The UNEP-INBAR report will help conrvationists to establish effective measures aimed at protecting valuable wild bamboo species. Towns end, too, es the UNEP report as an important step forward in promoting the cau of bamboo conrvation. “Until now, bamboo has been perceived as a cond-class plant. When you talk about places such as the Amazon, everyone always thinks about the hardwoods. Of cour the are significant, but there is a tendency to overlook the plants they are associated with, which are often bamboo species. In many ways, it is the most important plant known to man. I can’t think of another plant that is ud so much and is so commercially important in so many countries.” He believes that the most important first step is to get scientists into the field. “七年级上册英语期中考试卷We need to go out there, look at the plants and e how they survive and then u that information to conrve them for the future.” |
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