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Adelie penguin population sees rapid decline: Scientists_我的网站

一 |     By Liu Xinyu    (ECNS) – With the recent surge in popularity of the "503 Geocentric Roaming Loop" in Fuling District of Chongqing, the 816 Project Scenic Area -- the world's largest man-made cave structure -- has drawn a large number of domestic and overseas tourists, with its attractions enhanced by sound, light and electrical technologies.        Construction of the 816 Project began in 1966. More than 60,000 builders participated in the project. The total excavated area exceeds 104,000 square meters. The cave complex contains 18 large caverns and more than 130 tunnels, branch caves and vertical shafts. The main cavern, standing 79.6 meters high with 12 floors, is entirely hidden inside the mountain and is known as the "world's largest man-made cave."        The lighting system uses LED projection and laser mapping technology to enhance the technological atmosphere while preserving the original appearance of the project, allowing visitors to experience the mystery of this "underground Great Wall."        Stepping into the cave, visitors are greeted by a visual spectacle where light and shadow intertwine with the industrial texture of the space. Giant projection screens on the rock walls display futuristic cyberpunk imagery. In the core areas, shifting lights create a futuristic atmosphere.        In recent years, local authorities have leveraged the site's unique historical and spatial resources through preservation, utilization and integration of culture and tourism, bringing this underground nuclear facility into the public eye and attracting a growing number of visitors from across the country and around the world.                    。    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。

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