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
55
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
Womendonotusuallygettothetopinpolitics,buttherehavebeenafewnotab
WhydidtheIMFexpectJapantowitnessarealGDPdeclineof25percent?[br]
()被列为芭蕾史上“第一部无情节芭蕾”。A.《天鹅之死》 B.《仙女们》 C
阳明经头痛的特征是A.前额连眉棱骨痛 B.头两侧太阳穴处痛 C.后头部连项痛
粒红比值减低最常见的疾病是A.化脓性感染B.溶血性贫血C.类白血病反应D.慢性粒
发包方将农村土地发包给( )承包,应当事先经本集体经济组织成员的村民会议2/3
某多层刚性方案砖砌体教学楼,其局部平面如图所示。墙体厚度均为240mm,轴线均居
以下属于德育工作的新形式的是() A.创办业余党校B.建立德育基地
病人自觉大脑突然涌现出大量不自主的、杂乱无章的、不属于自己思想的陌生内容,此症状
下列不属于幼儿急疹特点的是 A.病原为柯萨奇病毒 B.潜伏期7?14天,平
最新回复
(
0
)