首页
登录
职称英语
Life has never been easy for just-hatched Magellanic penguins, but climate c
Life has never been easy for just-hatched Magellanic penguins, but climate c
游客
2023-08-15
21
管理
问题
Life has never been easy for just-hatched Magellanic penguins, but climate change is making it worse, according to a decades-long study of the largest breeding colony of the birds. The chicks are already vulnerable to predation and starvation. Now, the study at Punta Tombo, Argentina, found that intense storms and warmer temperatures are increasingly taking a toll.
Climate scientists say more extreme weather, including wetter storms and more prolonged periods of heat and cold, is one impact of a climate that is changing because of emissions of greenhouse gases in the atmosphere. While monitoring the penguin colony, Dr. Boersma, a University of Washington scientist, and her colleagues also documented regional temperature changes and increases in the number of days with heavy rains. The study is one of the first to show a direct impact of climate change on seabirds. Most studies have looked at how warming temperatures affect animals indirectly, by altering predation patterns or food supplies. William J. Sydeman, senior scientist at the Farallon Institute in California, who was not involved in the research, said the study linked changes in climate, which occur on a scale of decades, to the daily scale of life in the colony.
The colony at Punta Tombo, in a temperate and relatively dry region about midway along Argentina’s coast, is home to about 200 000 breeding pairs of the penguins, which are about 15 inches tall. Dr. Boersma has been working there since 1982, with long-term support from the Wildlife Conservation Society. For this study, the researchers compiled data on nearly 3 500 chicks that they meticulously tracked by checking nests once or twice a day throughout the six-month breeding season, which starts in September. Typically, nearly two-thirds of hatchlings at the colony do not survive to leave the nest. In most years, the researchers found, starvation and predation—by other seabirds and small animals—caused the majority of the deaths. But they found that heavy storms killed birds in 13 of the 28 years of the study. In two years, storms were responsible for most of the deaths. Extreme heat killed more hatchlings as well, although the effect was less pronounced. Like other young birds, penguin hatchlings can die from hypothermia(体温过低)if their down gets wet. The birds are most vulnerable from about a week after hatching—before that they are largely protected by a parent—to about six weeks, when they develop waterproof plumage(全身羽毛). Since 1987, the number of breeding pairs in the colony has declined 24 percent, Dr. Boersma said. It is difficult to calculate how much of that decline can be attributed to storms and rain, she said. Dr. Boersma said the increasing frequency of heavy storms was most likely directly affecting other seabird species that were breeding in the region. [br] Why does Dr. Boersma choose the Punta Tombo region?
选项
A、Because she has worked there for a long time.
B、Because the climate there is usually mild and dry.
C、Because many breeding pairs of Magellanic penguins live there.
D、Because it is a base for scientists to study penguins.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2929674.html
相关试题推荐
[originaltext]In2014,theUnitedNationsreleasedaseriesofclimaterepo
[originaltext]In2014,theUnitedNationsreleasedaseriesofclimaterepo
Lifehasneverbeeneasyforjust-hatchedMagellanicpenguins,butclimatec
Lifehasneverbeeneasyforjust-hatchedMagellanicpenguins,butclimatec
[originaltext]Goodmorning,I’mPeteMusto.Ourtopictodayisonclimatec
[originaltext]Goodmorning,I’mPeteMusto.Ourtopictodayisonclimatec
Climatechangemaybereal,butit’sstillnoteasybeinggreen
Climatechangemaybereal,butit’sstillnoteasybeinggreen
Climatechangemaybereal,butit’sstillnoteasybeinggreen
Climatechangemaybereal,butit’sstillnoteasybeinggreen
随机试题
Duringtheholidays,theconcertenjoyshuge(popular)______despitethehightick
Forthispart,youareallowed30minutestowriteashortessay.Youshouldsta
WhenJulesVernewroteJourneytotheCenteroftheEarthin1864,therewer
[originaltext]W:Hi,Mathew,congratulations!ImetProf.Greenthismorningan
下列概念中错误的是()。A.闭环控制系统的精度通常比开环系统高 B.开环系统不
甲亢的中医证型肝火旺盛证所选用的方药是A.逍遥散 B.龙胆泻肝汤 C.天王补
下列关于资本资产定价模型的说法错误的是()。A.资本资产定价模型(CAPM)以
温里剂中最多与温里散寒药配伍的是A.补气药B.理气药C.养阴药D.活血药E.补血
在()人员录用策略中,应聘者必须在每种测试中都达到一定水平,方能通过。A:补偿式
( )能够引起测评结果的误差。A.晕轮效应 B.感情效应 C.参评人员训练
最新回复
(
0
)