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
2015-08-26
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. "
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://kaotiyun.com/show/skXK777K
0
专业英语四级
相关试题推荐
HowmanypeoplediedinVirginiaTechshooting?
Whatisthenewestproblemfacingpeoplewhodrivetoschool?
Accordingtothepassage,beforetheagreementwasannouncedMonday,thetwosideshadbeenbargainingfor______days.
Accordingtothepassage,beforetheagreementwasannouncedMonday,thetwosideshadbeenbargainingfor______days.
Dozensofpeoplewerearrestedfor______racistpamphletstotheaudience.
Thesepeopleoncehadfameandfortune;now______islefttothemisutterpoverty.
Whenapsychologistdoesageneralexperimentaboutthehumanmind,heselectspeople______andasksthemquestions.
Peopletaking"doityourself"asawayoflifemaydothefollowingthingsEXCEPT
Whatisthefirstthingthatpeopleoughttodoinfaceofpollution,accordingtotheauthor?
随机试题
在黑盒测试方法中,设计测试用例的主要根据是()。
()除出现头昏、眼花、耳鸣等以外,还会出现昏厥或痉挛,体温超过40℃。
________的人民政府,可以根据法律和行政法规,制定规章。
关于辅助性T细胞被抗原活化,下述哪一项是正确的
公司分立以原公司法人资格是否消灭进行分类,可分为()。
下列关于楼地面工程量计算规则中叙述正确的是()。
造成设备无形磨损的原因有()。
壮族忌食()。
下列运算符不能重载为友元函数的是()。
数列按照1,2,2,3,3,3,4,4,4,4,5,…的规律一直排下去,whichofthefollowingisthe100thnumber?
最新回复
(
0
)