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
Ants as a Barometer of Ecological Change At picnics, ants are pests. But they have their uses. In industries such as mining, far
Ants as a Barometer of Ecological Change At picnics, ants are pests. But they have their uses. In industries such as mining, far
admin
2009-06-15
39
问题
Ants as a Barometer of Ecological Change
At picnics, ants are pests. But they have their uses. In industries such as mining, farming and forestry, they can help gauge the health of the environment by just crawling around and being antsy.
It has been recognized for decades that ants--which are highly sensitive to ecological change--can provide a near-perfect barometer of the state of an ecosystem. Only certain species, for instance, will continue to thrive at a forest site that has been cleared of trees.
(46)And still others will move in and take up residence.
By looking at which species populate a deforested area, scientists can determine how "stressed" the land is.(47)Ants are used simply because they are so common and comprise so many species.
Where mine sites are being restored, for example, some ant species will recolonize the stripped land more quickly than others.(48)Australian mining company Capricorn Coal Management has been successfully using ant surveys for years to determine the rate of recovery of land that it is replanting near its German Creek mine in Queensland,
Ant surveys also have been used with mine-site recovery projects in Africa and Brazil, where warm climates encourage dense and diverse ant populations. "We found it worked extremely well there," says Jonathan Majer, a professor of environmental biology. Yet the surveys are perfectly suited to climates throughout Asia, he says, because ants are so common throughout the region. As Majer puts it: "That’s the great thing about ants."
Ant surveys are so highly-regarded as ecological indicators that governments worldwide accept their results when assessing the environmental impact of mining and tree harvesting.
(49)
Why not? Because many companies can’t afford the expense or the laboratory time needed to sift results for a comprehensive survey. The cost stems, also, from the scarcity of ant specialists.
(50)
A This allowed scientists to gauge the pace and progress of the ecological recovery.
B Yet in other businesses, such as fanning and property development, ant surveys aren’t used widely.
C Employing those people are expensive.
D They do this by sorting the ants, counting their numbers and comparing the results with those of earlier surveys.
E The evolution of ant species may have a strong impact on our ecosystem.
F Others will die out for lack of food.
选项
答案
A
解析
选项A中的ecological recovery与前面一句中的recolonize相呼应,提示选项A的句子是前面句子的后续句。
转载请注明原文地址:https://kaotiyun.com/show/bGGd777K
本试题收录于:
职称英语综合类基础题库职称英语分类
0
职称英语综合类基础
职称英语
相关试题推荐
ChangesinMuseumsMuseumshavechanged.Theyarenolongerplacesthatone“should”visit,theyareplacestoenjoyandl
ChangesinMuseumsMuseumshavechanged.Theyarenolongerplacesthatone“should”visit,theyareplacestoenjoyandl
AlaskaIn1868AmericanswelcomedAlaskaintotheUnionasthe49thstate,symbolizingachangeofattitudefromthatheldi
MollyBrownwaslabeled“unsinkable”aftershehelpedtoevacuatepassengersfromtheill-fatedshiptheTitanic.
StandardEnglishStandardEnglishisthevarietyofEnglishwhichisusuallyusedinprintandwhichisnormallytaughtin
StandardEnglishStandardEnglishisthevarietyofEnglishwhichisusuallyusedinprintandwhichisnormallytaughtin
TheGreatestShowonEarthTheOlympicGames(奥林匹克运动会)arethegreatestfestivalofsportintheworld.Everyfouryears,a
Theimmensechangeofthecityastonishedeverymemberoftheconference.
Accordingtothepassage,whichofthefollowingisthemostpollutingenergyresource?Accordingtothepassage,resourceslik
TheEnglishWeather"Othercountrieshaveaclimate;inEnglandwehaveweather".Thisstatement,often’madebyEnglishmento
随机试题
A.大补元气B.接续筋骨C.补益肺肾D.补脾养心E.补脾益肾
5%.NaOH溶液酒石酸盐
关于碘解磷定的叙述,正确的是()。
下列中、小型变压器的部件中,( )属于保护装置。
风险监察是证券交易风险防范的一个方面。()
对于有问题的家庭,家庭社会工作的核心目标是()
某电子产品销售公司拟在本年度内为下属的地区销售部招聘20名营销经理。公司人力资源部王经理,对新招聘来的大学生小章说:“这项重要任务就交给你了,你先提出一个招聘方案吧!”小章是刚从一所知名大学人力资源管理专业毕业的本科生,他欣然地接受了任务,一周以后,他设计
绩效考评指标体系的设计方法包括()
能否发现问题,与个体的_________、已有的_________等有关。
从“欣赏.评述”的美术教学角度,美术多角度认识包含哪儿个内容(至少三个)?
最新回复
(
0
)