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
According to a study published this week in the journal Ecology Letters, the quantity of birds in Europe has declined by more th
According to a study published this week in the journal Ecology Letters, the quantity of birds in Europe has declined by more th
admin
2016-03-10
58
问题
According to a study published this week in the journal Ecology Letters, the quantity of birds in Europe has declined by more than 20 percent in the past 30 years. While there were over 2.1 billion European birds in 1980, there are now around 1.6 billion, says study co-author Rich Inger, an ecologist at the University of Exeter in the United Kingdom.
Most of the decline—or 90 percent—is accounted for by a shrinking population in the 36 most common species, Inger tells Newsweek. For example, throughout the continent there are now 62 percent fewer house sparrows(a common species also found in North America)than there were when Margaret Thatcher became prime minister, a decline of about 150 million animals, he says. There were also drops in the numbers of such common species as skylarks(云雀), grey partridges(灰色鹧鸪)and starlings(椋鸟).
The decline is likely due in part to habitat loss and pesticide use. The amount of land used for agriculture in Europe has greatly increased since 1980, and there are fewer places for birds to nest and find food, Inger says. At the same time, pesticide use has gone up, knocking down the number of "pests" like insects that birds prey upon, he adds. "We don’t manage the environment in a way that’s good for birds," Inger says.
The study looked at an immense amount of data collected by thousands of "citizen scientists" over 30 years in most countries in Europe, in "an insightful departure from conventional approaches to reviewing bird monitoring data," said Michael Wunder, an ornithologist(鸟类学家)at the University of Colorado-Denver who wasn’t involved in the study. Wunder says the study clearly shows that "population sizes are most strongly affected by land use patterns" like farming. The measures used to protect rare species, like restrictions on hunting in certain areas, are not enough to prevent a decline in common birds, he adds.
If we want to protect birds in general, we need to change farming practices to provide more non-crop-laden land for birds, Inger says. Reducing pesticides would also help, as research has shown that areas with high pesticide use have fewer birds. "What we can do is start more environmentally friendly farming," Inger says. "We can leave wider margins on fields, get farmers to look after hedgerows(灌木篱墙), put up more bird boxes and provide places for birds to nest."
When doing environmentally friendly farming, farmers______.
选项
A、leave some space for birds
B、suffer from less harvest
C、provide food for birds
D、pick new types of crops
答案
A
解析
细节题。由题干中的environmentally friendly farming定位至最后一段。该段指出,当农民们采用保护环境的耕种模式时,他们会在地边留出更大的空地、确定灌木篱笆是否合适、安放鸟箱以及给鸟类留出筑巢的空间,也就是说,他们会给鸟类留出更多的空间,故[A]为答案。
转载请注明原文地址:https://kaotiyun.com/show/wBPK777K
0
专业英语四级
相关试题推荐
WhichofthefollowingitalicizedpartsisNOTanattributiveclause?
Whichofthefollowingsentencesdoesnotincludeanindependentgenitiveconstruction?
______somewhatambitiousaswellasnaive,theydecidedtoextendtheirgraduateeducationbyattendingaprestigiousuniversit
Interruption,moresurelythananythingelse,killsconversation.Thebestoftalkersinterrupt【C1】______inconversation.Howe
Interruption,moresurelythananythingelse,killsconversation.Thebestoftalkersinterrupt【C1】______inconversation.Howe
Anarmyspokesmanclaimsthemilitantsare______therun.
[A]brief[B]conclude[C]cumulative[D]descendants[E]Developed[F]Exotic[G]hazard[H]ingested[I]inhabitants[J]lingering[K]marine[L]n
[A]accidentally[B]aggression[C]ambitious[D]commuters[E]conflict[F]enhanced[G]estimates[H]facilities[I]nuisances[J]owners[K]pro
Thespokesmanmadeitevident______nocompromisewasyetinsight.
UnderstandingTypesofPoemsI.EpicpoemsA.Definition:—anarrativeconcentratingon【T1】andeventsthataresignificant【T1】_
随机试题
下列做法不正确的是()
麦芽、稻芽均具有的功效是____________;除治米面薯芋类积滞外,还皆可用治____________。
常规CT扫描采取俯卧位的是
亚硝酸中毒的特效解毒剂是
维生素C维生素E
A.吸入型糖皮质激素B.非甾体抗炎药B.β受体阻断剂D.短效β2受体激动剂E.白三烯受体阻断剂连续规律用药2日以上方能充分发挥作用的药品是()。
对现场建筑材料的堆放的一般要求有()。
依照英国伦敦保险协会的“协会货物条款”规定,保险公司对其基本险所承担的责任范围最大的是()。
按照我国《保险法》规定,人身保险合同中不可抗辩条款适用的情况是( )。
以下有关货币的时间价值的说法,正确的有( )。
最新回复
(
0
)