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Adelie penguin population sees rapid decline: Scientists_我的网站

A |     Canberra, Oct 12 (UNI) Australia's top Antarctic scientists have reported a rapid decline in a population of Adelie penguins.

According to research published by the Australian Antarctic Division (AAD) on Tuesday, a large Adelie population off the East Antarctic coast has declined by 43 per cent over the last decade.

Ecologists from the AAD, led by Louise Emmerson and Colin Southwell, surveyed 52 islands along the 100-km coastline.

They found the number of occupied nests fell from 176,622 to 99,946 in that period.
Their findings are contrary to other Adelie penguin populations in east Antarctica where numbers have been stable.

The most widespread penguin species, the Adelie is found along the entire Antarctic coast. Models had predicted the particular population observed by the AAD would continue to grow.

Researchers concluded a change in environmental conditions was the cause of the decline.

"We think this population decline was initially triggered by five years of extensive summer sea ice adjacent to the colony in the mid-2000s, which hampered access to the adults' foraging areas and saw virtually no chicks survive," Emmerson said in a media release.

"The frequency of these unfavorable breeding conditions subsequently remained high, and fledgling survival also began to decrease. These two processes together resulted in a more rapid population decline than would be expected if they had been acting in isolation."

She warned that the smaller the population becomes the harder it will be for individuals to survive.

"It may be that the old adage of safety in numbers is playing out for the fledglings in the vast and harsh Southern Ocean, although exactly why and how needs further investigation," Emmerson said.
UNI/XINHUA ING。

B |     最初的恢复工作是朝着改善太阳能和加热推进系统的方向进行的，以使温度恢复到工作极限以上。在为恢复行动做准备时，工作人员发现已经能够改善推进剂和其他关键系统的航天器热力条件，同时保持积极的发电量。Cislunar自主定位系统技术操作和导航实验（CAPSTONE）任务小组正在继续努力恢复航天器方向控制。

C | 这项工作包括收集来自航天器的信息，运行模拟，并完善恢复计划。CAPSTONE目前工作在正功率下，这意味着它从其太阳能电池板产生的电力比航天器系统使用的电力多，该航天器在通往月球的轨道上将可以继续保持稳定状态。

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Published on:11:32:10