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
2024-04-08
2
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] According to Dr. Boersma’s study,______.
选项
A、most chicks died before leaving the nest
B、the climate of the colony is getting better for chicks
C、the storm is the most dangerous enemy for chicks
D、it’s difficult to link extreme heat to the death of chicks
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3545936.html
相关试题推荐
[originaltext]Goodmorning,I’mPeteMusto.Ourtopictodayisonclimatec
[originaltext]Goodmorning,I’mPeteMusto.Ourtopictodayisonclimatec
Somefishseemtobecapableofadaptingrapidlytoclimatechange.Infact,
Somefishseemtobecapableofadaptingrapidlytoclimatechange.Infact,
Somefishseemtobecapableofadaptingrapidlytoclimatechange.Infact,
Somefishseemtobecapableofadaptingrapidlytoclimatechange.Infact,
[originaltext]In2014,theUnitedNationsreleasedaseriesofclimaterepo
Lifehasneverbeeneasyforjust-hatchedMagellanicpenguins,butclimatec
[originaltext]Goodmorning,I’mPeteMusto.Ourtopictodayisonclimatec
[originaltext]Goodmorning,I’mPeteMusto.Ourtopictodayisonclimatec
随机试题
Insportthesexesareseparate.Womenandmendonotrunorswiminthesam
Modemcowboyseemtobegivingupthebandanna(印花大手帕)handkerchief;yetthe
PassageThree(1)Givenallthathashappenedonsomanycampusesover
Paintinghasbeencontinuouslypracticedbyhumansforsome20,000years.T
MostChinesepeoplewenttoworkbybikewithinliving_____.(2012-72)A、mindB、kn
垄断竞争市场的特点是()。A.较多的卖者和买者 B.存在产品差别 C.同时
具有翼板,能同时扩大上下牙弓的活动矫治器是A.螺旋器分裂基托矫治器 B.Cto
下列交易或事项产生的现金流量中,不属于投资活动产生的现金流量的是()。A、为购建
产妇产房内待产,护士讲解正常的脐带结构是A.1条动脉,2条静脉 B.2条动脉,
单位负责人是单位对外提供财务会计报告的责任主体,必须保证对外提供的财务会计报告的
最新回复
(
0
)