[新聞] 南極冰層下 英攝影隊拍到3公尺長巨蟲뜠… - X檔案
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By Ina
at 2009-12-01T18:36
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Table of Contents
※ [本文轉錄自 Gossiping 看板]
作者: dl123 (NYDJ) 看板: Gossiping
標題: [新聞] 南極冰層下 英攝影隊拍到3公尺長巨蟲搶食死海豹
時間: Tue Dec 1 17:32:45 2009
英國一支攝影隊在南極厚厚的冰層下拍攝到大量五顏六色的海星和3公尺長的巨型蟲,正
聚在一起瘋狂地爭吃一隻沉入海底的死海豹。
大陸新華網報導,在南極麥克默多海峽冰冷的海水裡,這麼多食物也許10年才能遇到一
次,這些畫面是潛水員為自然歷史系列節目《生命(Life)》拍攝的。攝影師在冰上鑿出一
個小洞,把一部延時攝像機送到海床上,拍攝到許許多多巨蟲、海星和海膽正在瘋狂蠶食
一隻死海豹。
紐形動物類(Nemertine worms),又叫鞋帶或者絲帶蟲,屬於紐形動物門,一些種類屬食
腐動物,但是大部分都是非常貪婪的掠食動物,它們利用從口腔射出的長長的鼻狀物捕食
,根據種類不同,它們的鼻狀物可能有毒或可以分泌粘性液體,在南極這種海蟲經常以蚌
類和甲殼動物為食,它們也跟海星聚集在一起,食用海豹的排泄物。
在為《生命》系列節目拍攝的這個海底場景中,大量無脊椎動物蜂擁聚集到一隻沈入海底
的死海豹身上,開始瘋狂享用美餐。海豹屍體沉到海底的情況,也許每10年才能遇到一次
,紐形蟲可以利用鼻狀物在海豹的皮膚上鑽洞,這樣它們和樹虱(woodlice)等其他海生等
足目動物就能鑽到海豹體內進食。
海星的進食速度更慢一些,它們在吃東西時要把胃從空腔裡吐出來,再把胃抵在海豹的皮
膚上,利用分泌的消化液分解海豹的組織,海膽也趕來希望能分一杯羹。跟巨蟲一樣,它
們也是五顏六色。這些生物不僅有時會用外殼偽裝自己,而且壽命可達40年。由於南極水
溫很低,生活在冰層下的很多生物生長十分緩慢,不過它們的壽命很長,而且體積可以長
到很大。
蟹類等其他更加普遍的食肉動物在溫帶和熱帶海洋的海床上佔據著統治地位,然而化石記
錄顯示,大約在3500萬年前,這些動物在南極水域消失,此時這裏的溫度正在慢慢降低。
現在南極既沒有龍蝦,也沒有螃蟹,也很少有鯊魚和鷂魚等。一些非常奇特的動物潛伏在
那裏,其中包括海膽、海星、巨蟲和巨大的水下蜘蛛蟹,這種蟹的直徑可以生長到30公分
,壽命可達幾十年。
去年研究人員警告說,全球繼續升溫會給這些獨特的海洋生命帶來威脅。過去50年間,南
極周圍的海表溫度上升了攝氏1到2度,升溫速度超過全球平均升溫速度的兩倍,這將促使
蟹遷入該水域,接著是鯊魚等,它們會大量消滅當地生物。
如果真發生了這樣的事情,南極海底的這些統治者將不再是行動緩慢的軟體無脊椎動物,
科學家認為,這種情況跟他們在以甲殼類食肉動物的進化為主的遠古海洋看到的情景非常
類似。
http://www.nownews.com/2009/12/01/91-2540405.htm
--
作者: dl123 (NYDJ) 看板: Gossiping
標題: [新聞] 南極冰層下 英攝影隊拍到3公尺長巨蟲搶食死海豹
時間: Tue Dec 1 17:32:45 2009
英國一支攝影隊在南極厚厚的冰層下拍攝到大量五顏六色的海星和3公尺長的巨型蟲,正
聚在一起瘋狂地爭吃一隻沉入海底的死海豹。
大陸新華網報導,在南極麥克默多海峽冰冷的海水裡,這麼多食物也許10年才能遇到一
次,這些畫面是潛水員為自然歷史系列節目《生命(Life)》拍攝的。攝影師在冰上鑿出一
個小洞,把一部延時攝像機送到海床上,拍攝到許許多多巨蟲、海星和海膽正在瘋狂蠶食
一隻死海豹。
紐形動物類(Nemertine worms),又叫鞋帶或者絲帶蟲,屬於紐形動物門,一些種類屬食
腐動物,但是大部分都是非常貪婪的掠食動物,它們利用從口腔射出的長長的鼻狀物捕食
,根據種類不同,它們的鼻狀物可能有毒或可以分泌粘性液體,在南極這種海蟲經常以蚌
類和甲殼動物為食,它們也跟海星聚集在一起,食用海豹的排泄物。
在為《生命》系列節目拍攝的這個海底場景中,大量無脊椎動物蜂擁聚集到一隻沈入海底
的死海豹身上,開始瘋狂享用美餐。海豹屍體沉到海底的情況,也許每10年才能遇到一次
,紐形蟲可以利用鼻狀物在海豹的皮膚上鑽洞,這樣它們和樹虱(woodlice)等其他海生等
足目動物就能鑽到海豹體內進食。
海星的進食速度更慢一些,它們在吃東西時要把胃從空腔裡吐出來,再把胃抵在海豹的皮
膚上,利用分泌的消化液分解海豹的組織,海膽也趕來希望能分一杯羹。跟巨蟲一樣,它
們也是五顏六色。這些生物不僅有時會用外殼偽裝自己,而且壽命可達40年。由於南極水
溫很低,生活在冰層下的很多生物生長十分緩慢,不過它們的壽命很長,而且體積可以長
到很大。
蟹類等其他更加普遍的食肉動物在溫帶和熱帶海洋的海床上佔據著統治地位,然而化石記
錄顯示,大約在3500萬年前,這些動物在南極水域消失,此時這裏的溫度正在慢慢降低。
現在南極既沒有龍蝦,也沒有螃蟹,也很少有鯊魚和鷂魚等。一些非常奇特的動物潛伏在
那裏,其中包括海膽、海星、巨蟲和巨大的水下蜘蛛蟹,這種蟹的直徑可以生長到30公分
,壽命可達幾十年。
去年研究人員警告說,全球繼續升溫會給這些獨特的海洋生命帶來威脅。過去50年間,南
極周圍的海表溫度上升了攝氏1到2度,升溫速度超過全球平均升溫速度的兩倍,這將促使
蟹遷入該水域,接著是鯊魚等,它們會大量消滅當地生物。
如果真發生了這樣的事情,南極海底的這些統治者將不再是行動緩慢的軟體無脊椎動物,
科學家認為,這種情況跟他們在以甲殼類食肉動物的進化為主的遠古海洋看到的情景非常
類似。
http://www.nownews.com/2009/12/01/91-2540405.htm
--
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at 2010-01-30T23:05
at 2010-01-30T23:05
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By Puput
at 2010-02-01T03:59
at 2010-02-01T03:59
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By Steve
at 2010-02-02T08:52
at 2010-02-02T08:52
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By Megan
at 2010-02-03T13:46
at 2010-02-03T13:46
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By Selena
at 2010-02-04T18:39
at 2010-02-04T18:39
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By Freda
at 2010-02-05T23:32
at 2010-02-05T23:32
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By Sandy
at 2010-02-07T04:26
at 2010-02-07T04:26
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By Doris
at 2010-02-08T09:19
at 2010-02-08T09:19
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By Gary
at 2010-02-09T14:12
at 2010-02-09T14:12
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By Hazel
at 2010-02-10T19:06
at 2010-02-10T19:06
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By Rae
at 2010-02-11T23:59
at 2010-02-11T23:59
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By Andy
at 2010-02-13T04:53
at 2010-02-13T04:53
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By William
at 2010-02-14T09:46
at 2010-02-14T09:46
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By Hamiltion
at 2010-02-15T14:39
at 2010-02-15T14:39
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By Anonymous
at 2010-02-16T19:33
at 2010-02-16T19:33
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By Ula
at 2010-02-18T00:26
at 2010-02-18T00:26
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By Liam
at 2010-02-19T05:19
at 2010-02-19T05:19
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