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
45
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
Fromthetestimonyemergesaman______deviousandhonest,vulgarandgallant,
Dr.Jonescheckedthepatient’s______carefullybeforemakinghistreatment.A、s
Mostpeoplethinkofzoosassafeplacesforanimals,wherestrugglessucha
狭义的金融创新一般指()的创新。A.金融工具 B.金融产品 C.金
下列属于收费车道设备实测项目的有()。A.打印机 B.车道控制机 C.天棚
患男,30岁。发热1天,右下腹痛,拒按,大便3日未行,舌质红,舌苔黄,脉滑数。宜
排他性条款中被投资企业在与投资者进行谈判的同时()。A.可以和其他3家投资方接
母线并列或跨站合环操作时,分接两段母线上的消弧线圈不宜(____)。巡视$;$测
柏子养心丸中朱砂的含量占A.2.8% B.3.8% C.4.8% D.5.
女,30岁。自幼咳嗽咳痰,近日痰量多,痰白黏稠牵拉成丝难以咳出,提示可能病因A.
最新回复
(
0
)