日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

WORLD> Global General
British scientists map Antarctic penguins from space
(Xinhua)
Updated: 2009-06-04 00:32

WASHINGTON-- Penguin poo (guano) stains, visible from space, have helped British scientists locate emperor penguin breeding colonies in Antarctica.

Related readings:
British scientists map Antarctic penguins from space First emperor penguin egg laid in China
British scientists map Antarctic penguins from space Scientists find new penguin 'extinct for 500 years'
British scientists map Antarctic penguins from space Penguin population plunge points to climate havoc
British scientists map Antarctic penguins from space Penguin puts on wetsuit to swim again

British scientists map Antarctic penguins from space Baby penguin born in Snow City

Knowing their location provides a baseline for monitoring their response to environmental change, according to a new study published this week in the US journal Global Ecology and Biogeography.

In the new study, scientists from British Antarctic Survey (BAS)describe how they used satellite images to survey the sea-ice around 90 percent of Antarctica's coast to search for emperor penguin colonies.

The survey identified a total of 38. Ten of those were new. Of the previously known colonies six had re-located and six were not found.

Because emperor penguins breed on sea-ice during the Antarctic winter little is known about their colonies.

Reddish brown patches of guano on the ice, visible in satellite images, provide a reliable indication of their location.

BAS mapping expert Peter Fretwell explains "We can't see actual penguins on the satellite maps because the resolution isn't good enough. But during the breeding season the birds stay at a colony for eight months. The ice gets pretty dirty and it's the guano stains that we can see."

Emperor penguins spend a large part of their lives at sea. During the Antarctic winter when temperatures drop to 50 Celsius degree below zero they return to their colonies to breed on sea-ice, but this is a time when it is most difficult for scientists to monitor them.

BAS Penguin ecologist Dr Phil Trathan says: "This is a very exciting development. Now we know exactly where the penguins are, the next step will be to count each colony so we can get a much better picture of population size.

Using satellite images combined with counts of penguin numbers puts us in a much better position to monitor future population changes over time."

This research builds on work by French scientists who extensively studied one colony and found the population was at significant risk from climate change. The six colonies not found in this study were at a similar latitude suggesting that emperor penguins may be at risk all around Antarctica.

 

主站蜘蛛池模板: 日韩免费一区二区三区 | 久久久久久久艹 | 午夜影院h| 国产原创 | 天堂成人在线观看 | 精品国自产在线观看 | 韩国一级黄色录像 | 伊人影院视频 | 一区二区三区在线观看 | 日韩中文字幕免费在线观看 | 少妇久久久久久久 | 午夜一区二区三区在线观看 | 成年免费视频黄网站在线观看 | 国产日韩一区二区 | 国产精品自拍网站 | 成人av网站在线观看 | 在线成人亚洲 | 中文字幕在线播放一区 | 欧美精品久久久久久久久老牛影院 | 国产综合图片 | 在线视频天堂 | 成人在线免费观看视频 | 仙踪林av | 亚洲a视频 | 操操操视频 | 鲁大师影院在线播放观看免费版中文 | 亚洲色图清纯唯美 | 能看的毛片 | 超碰1997| 男人的天堂视频网站 | 日韩欧美日本 | 久久精品国产精品亚洲精品色 | 日韩激情视频在线观看 | 欧美激情一区在线 | 精品视频久久 | 中文一区二区在线观看 | 日本高清视频一区二区 | 国产精品久久久久无码av | 午夜久久av | 日韩有码在线观看 | 在线观看免费黄色 |