极夜时北冰洋中的动物并不睡觉
文章来源:未知 文章作者:enread 发布时间:2015-09-28 07:11 字体: [ ]  进入论坛
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You might expect that little happens in the Arctic Ocean during the cold and dark winter. But that just isn't so, according to researchers who have sampled the activities of many different species during three consecutive1 winters in Kongsfjorden, Svalbard. Their findings are published in the Cell Press journal Current Biology on September 24. "This once and for all changes the way we think of marine2 ecosystems4 during the polar night," says Jørgen Berge of UiT The Arctic University of Norway and the University Centre in Svalbard.
 
"The dark polar night is not a period without any biological activity [as had been assumed]. Concealed5 behind the curtain of darkness is a world of activity, beauty, and ecosystem3 importance."
 
Berge says the researchers were inspired to look more closely at what happens during the polar night based on a chance encounter they had on a small boat in the middle of a Svalbard fjord.
 
"Above us was a starry6, winter night and below us were countless7 blue-green 'stars' in the deep" produced by bioluminescent organisms, Berge says. "The beauty of it was stunning8, and the fact that so many organisms were producing light was a strong indication that the system was not in a resting mode."
 
He decided9 then and there to do a large-scale survey and ecosystem study of the polar night in one of the Svalbard fjords during three consecutive winters. Instead of an ecosystem that had entered a resting state, the researchers say they found a system buzzing with biological activity. In fact, the diversity and reproductive activity of some species was actually greater during the winter than at other times of the year.
 
The researchers found, for instance, that copepods and other zooplankton were actively10 reproducing as filter-feeding Iceland scallops kept right on growing. Baited traps with time-lapse cameras revealed an abundant and active community of shallow-water scavengers, including whelks, amphipods, and crabs11.


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1 consecutive DpPz0     
adj.连续的,联贯的,始终一贯的
参考例句:
  • It has rained for four consecutive days.已连续下了四天雨。
  • The policy of our Party is consecutive.我党的政策始终如一。
2 marine 77Izo     
adj.海的;海生的;航海的;海事的;n.水兵
参考例句:
  • Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
  • When the war broke out,he volunteered for the Marine Corps.战争爆发时,他自愿参加了海军陆战队。
3 ecosystem Wq4xz     
n.生态系统
参考例句:
  • This destroyed the ecosystem of the island.这样破坏了岛上的生态系统。
  • We all have an interest in maintaining the integrity of the ecosystem.维持生态系统的完整是我们共同的利益。
4 ecosystems 94cb0e40a815bea1157ac8aab9a5380d     
n.生态系统( ecosystem的名词复数 )
参考例句:
  • There are highly sensitive and delicately balanced ecosystems in the forest. 森林里有高度敏感、灵敏平衡的各种生态系统。 来自《简明英汉词典》
  • Madagascar's ecosystems range from rainforest to semi-desert. 马达加斯加生态系统类型多样,从雨林到半荒漠等不一而足。 来自辞典例句
5 concealed 0v3zxG     
a.隐藏的,隐蔽的
参考例句:
  • The paintings were concealed beneath a thick layer of plaster. 那些画被隐藏在厚厚的灰泥层下面。
  • I think he had a gun concealed about his person. 我认为他当时身上藏有一支枪。
6 starry VhWzfP     
adj.星光照耀的, 闪亮的
参考例句:
  • He looked at the starry heavens.他瞧着布满星星的天空。
  • I like the starry winter sky.我喜欢这满天星斗的冬夜。
7 countless 7vqz9L     
adj.无数的,多得不计其数的
参考例句:
  • In the war countless innocent people lost their lives.在这场战争中无数无辜的人丧失了性命。
  • I've told you countless times.我已经告诉你无数遍了。
8 stunning NhGzDh     
adj.极好的;使人晕倒的
参考例句:
  • His plays are distinguished only by their stunning mediocrity.他的戏剧与众不同之处就是平凡得出奇。
  • The finished effect was absolutely stunning.完工后的效果非常美。
9 decided lvqzZd     
adj.决定了的,坚决的;明显的,明确的
参考例句:
  • This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
  • There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
10 actively lzezni     
adv.积极地,勤奋地
参考例句:
  • During this period all the students were actively participating.在这节课中所有的学生都积极参加。
  • We are actively intervening to settle a quarrel.我们正在积极调解争执。
11 crabs a26cc3db05581d7cfc36d59943c77523     
n.蟹( crab的名词复数 );阴虱寄生病;蟹肉v.捕蟹( crab的第三人称单数 )
参考例句:
  • As we walked along the seashore we saw lots of tiny crabs. 我们在海岸上散步时看到很多小蟹。 来自《简明英汉词典》
  • The fish and crabs scavenge for decaying tissue. 鱼和蟹搜寻腐烂的组织为食。 来自《简明英汉词典》
TAG标签: night polar species
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