首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Protecting just 42 sites across Asia, ranging from temperate forests to tropical grasslands, could be key to the survival of one
Protecting just 42 sites across Asia, ranging from temperate forests to tropical grasslands, could be key to the survival of one
admin
2013-07-20
49
问题
Protecting just 42 sites across Asia, ranging from temperate forests to tropical grasslands, could be key to the survival of one of the world’s most symbolic and feared, wild cats—the tiger.
That radical proposal, published online in the journal Public Library of Science-. Biology, represents a scaling-back of ambition and what one of the paper’s authors calls "ruthless priority setting". "It’s forcing hard decisions," said Simon Stuart, co-author of the paper, who chairs the species survival commission at the International Union for Conservation of Nature. For animals that are worth considerable sums, he added, "there’s no way you can protect them across an entire landscape, because the costs are too high".
John Robinson, executive vice president for conservation and science at the Wildlife Conservation Society, said researchers experienced "a real shock" when they determined what was needed to keep the species going. The majority of about 1 000 breeding females are found in India, Russia and Indonesia. None remain in Cambodia, China, DPRK and Vietnam. "Unless we protect those core populations, within a few short years we could lose tigers altogether," said Robinson, another of the paper’s co-authors.
Over the past couple of decades, environmentalists have focused on preserving large, ecologically rich landscapes to ensure that a wide range of plant and animal species can thrive over the long term. But for a number of highly endangered species, scientists now say, governments and nonprofit organizations must target their efforts more narrowly if they want to ensure that these populations remain viable.
In the case of the tiger, three factors—habitat loss, the overhunting of its prey and poaching (偷猎)— have caused its number to drop from more than 10 000 in the 1980s to fewer than 3 500 today. It is said that tiger parts are so prized in Eastern medicine that a dead one can sell for $ 1 500 to $ 3 500 before its eyes are sold as a cure for some complicated diseases and are converted into a soup for the body, and its bones are ground into powder to treat some diseases like typhoid (伤寒). Researchers have determined that tigers occupy less than 7 percent of their historic range. In addition to poaching, Asia’s rapid economic development—including road and dam construction—has eroded tiger habitat.
Robinson and others advocate a two-step process that focuses on monitoring and protecting tigers in the 42 source sites and a longer-term effort to preserve the large landscapes tigers need to hunt and wander.
The number of tigers has decreased since the 1980s due to the overhunting of its prey,______.
选项
答案
habitat loss and poaching
解析
信息明示题。本题考查自从20世纪80年代以来老虎数量锐减的原因。根据定位句可知,三大因素导致了这一结果,其中包括栖息地的丧失、对老虎猎物的过度捕猎以及偷猎。题干中的The auraber of…decreased是对原文中its humber to drop的同义转述。
转载请注明原文地址:https://kaotiyun.com/show/IKn7777K
0
大学英语六级
相关试题推荐
Parentsareoftenupsetwhentheirchildrenpraisethehomesoftheirfriendsandregarditasaslur(诽谤,中伤)ontheirowncooki
A、Unemployment.B、Familybreakup.C、Mentalproblems.D、Drinking.B女士问男士。在街上流浪的是哪些人,男士说,有失业的,有精神病患者,还有一些酒鬼。这些信息中没有“家庭破裂者”
A、Radiationfromtheterminal.B、Stressinworkinghours.C、Withoutadequateeye-drops.D、Lessorlittlemoistureintheeyes.D
A、Becausesomeimportedgoodscauseenvironmentaldamage.B、BecauseUKwastesalotofmoneyimportingfoodproducts.C、Because
OnDecember25,2000,manypeopleacrossNorthAmericareceivedarareChristmastreatwhenthemoonpassedinfrontofthesun
Itisoftenclaimedthatnuclearenergyissomethingwecannotdowithout.Weliveinaconsumersocietywherethereisanenorm
A、Ithasshownthataspirincanimprovesurvivalincoloncancerpatients.B、Ithasshownthatcoloncancerhadnotspreadtoot
Theyputontheirheadphones,drapeahoodovertheirheadanddriftoffintotheworldof"digitalhighs."VideospostedonYou
A、Themanwasusingadigitalcamera.B、Thewomanranoutoffilmwhenshetookpictures.C、Themandidn’ttakeanypictures.D、
Tomissomeanthat______(他宁愿上班迟到也不坐出租车).
随机试题
水肿属风水相搏者,最佳选方是
某建设项目由厂房、办公楼、宿舍等单项工程组成..其中属于单项工程综合概算中的内容是()。【2013年真题】
给水与污水处理厂试运转单机试车,一般空车试运行不少于()。
某工程项目进行隐蔽验收时,由于钢筋复检结果尚未出来,监理未同意隐蔽。建设单位要求赶工,责令施工单位进行了工程隐蔽。后钢筋复检结果不合格,工程需重新返工。对于损失的承担,说法正确的是()。
疯狂扩散的蓝藻起初并没有使人们感到(),往年正常情况下,它顶多影响太湖的一些景观,不会带来什么骚乱。雨季一来,这些小生物会被大量的雨水冲刷稀释,人们会渐渐()它,直到第二年的来临。还有一些农民把它们捞起来当肥料,()地称之为“海油”。
高尔基是苏联无产阶级伟大作家,被列宁称为“无产阶级艺术的最杰出代表”。下列各项中不属于其自传体三部曲的是()。
某食堂的售饭系统由一个后台数据库系统及若干个前台刷卡机组成,其基本功能具体描述如下:a、刷卡机的硬件组成中,除了必须的最小硬件系统外,还需要IC卡读写模块、8段LED组成的显示模块、键盘模块、蜂鸣器模块、RS一485通信模块等。b、客户
ClassificationofLodgingPlacesThetouristindustryhasitsownsystemtoclassifydifferenttypesoflodgingplaces.Five
TheWorldHealthOrganization(WHO)wassetupon7thApril1948,adatethatisnowcelebratedeveryyearasWorldHealthDay.T
Iprefersinging______drawing.
最新回复
(
0
)