首页
登录
职称英语
According to a study published this week in the journal Ecology Letters, the
According to a study published this week in the journal Ecology Letters, the
游客
2023-11-04
45
管理
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. " [br] What is the influence of more pesticide use on birds?
选项
A、There is no place for birds to nest.
B、There is less food for birds.
C、Birds are poisoned and die out.
D、The eggs of birds can’t be hatched.
答案
B
解析
细节题。由题干中的more pesticide use定位至第三段第三句。该句指出,使用杀虫剂的增多使虫子的数量变少,鸟类靠捕食虫子为生,因此,鸟类的食物来源就得不到保障,故[B]为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3156387.html
相关试题推荐
Accordingtoarecentsurveyoncollegestudents’mentalwell-being,20perc
Accordingtoanumberofstudents,______isthemainfactorforearly-agesmokin
Accordingtoanumberofstudents,______isthemainfactorforearly-agesmokin
Accordingtoanumberofstudents,______isthemainfactorforearly-agesmokin
Bythe1980s,accordingtointernationalbutadmittedlyinconsistentdefinit
Bythe1980s,accordingtointernationalbutadmittedlyinconsistentdefinit
Bythe1980s,accordingtointernationalbutadmittedlyinconsistentdefinit
AccordingtotheAmericanfederalgovernment,residentsofHawaiihavethelonge
WhatisAustraliasufferingfromatpresentaccordingtothepassage?[br][ori
WhatisAustraliasufferingfromatpresentaccordingtothepassage?[br][ori
随机试题
InasurveyconductedbyresearchfirmHarrisInteractive,71%ofAmericans
[originaltext]Andfinallyintonight’snews,a9-year-oldboynamedJoe,to
1940年( )和1940年( )是美国关于共同基金的两部最重要的法律,不但
引起脑部病变的寄生虫是A.链状带绦虫成虫B.肥胖带绦虫成虫C.链状带绦虫囊尾蚴D
对某土试样测得以下物理力学性质指标:饱入度S1=100%,液限WL=37%,
()是指当有机体不能利用原有图式接受和解释新剌激时,其认知结构发生改变
对反向市场描述正确的是()。A.反向市场产生的原因是近期需求迫切或远期供给
若公司董事会作出的决议存在违反公司章程规定的内容,则可以对该决议提起撤销之诉的人
下列关于城市维护建设税税率的说法,正确的有()。A.某县城高尔夫球具制造厂受托
下列关于虚箭线的说法错误的是()。A.不消耗时间 B.不消耗资
最新回复
(
0
)