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
52
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] The collection of the young penguins’ data______.
选项
A、occurs during the breeding season
B、is most important on days of extreme weather
C、is largely carried out by the Wildlife Conservation Society
D、is the most difficult part during the course of the study
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2929675.html
相关试题推荐
[originaltext]Goodmorning,I’mPeteMusto.Ourtopictodayisonclimatec
[originaltext]Goodmorning,I’mPeteMusto.Ourtopictodayisonclimatec
Somefishseemtobecapableofadaptingrapidlytoclimatechange.Infact,
[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
随机试题
[originaltext]W:Tim,weneedtodosomethingaboutSteve.M:What’stheprobl
Ofallthewebsites,onethathasattractedattentionrecentlyismyspace,
目前,我国饭店可利用的预订网络主要有()。A.全球分销系统 B.地方预订营
某公司的人员流动比较频繁,网络信息系统管理员为了减少频繁的授权变动,其访问控制模
参与转融通业务应当遵循的原则有()。 Ⅰ.平等 Ⅱ.自愿 Ⅲ.公平 Ⅳ.
T、B淋巴细胞分离不能用的方法是A.E花环沉降法B.自然沉降法C.尼龙毛柱分离法
赵某,男性,35岁。在一次活动后突然出现左腰部绞痛,相继出现肉眼血尿,左腰部有轻
()就是利用有关的信息资料对人的行为进行分析,从而推论其原因的过程。A.内因
面试热点:直播带货点燃经济增长新引擎 【热点背景】 直播带货显然成为
利用计算机的音乐功能将教材内容呈现给学生是多媒体技术在辅助教学中哪方面应用(
最新回复
(
0
)