Those bacteria snack on nutrients that float down from the surface—so-called marine snow.
这些细菌以从海面上落下被称为海洋雪的营养物为食。
单词 | Marine snow |
释义 |
Marine snow
原声例句
科学60秒 听力 2015年1月合集 Those bacteria snack on nutrients that float down from the surface—so-called marine snow. 这些细菌以从海面上落下被称为海洋雪的营养物为食。 科普小杂文 These particles we've seen raining down are marine snow. 我们看到的这些落下的粒子是海雪。 TED-Ed(视频版) What Forbes failed to take into account is something called marine snow, which sounds much nicer than it is. 当然,深海生物的发现证实了他是错的,福布斯没有考虑到的是一种叫海雪的东西。 VOA Standard 2015年10月合集 PELAGRA will suck ocean water with marine snow into containers and periodically bring them to the surface for detailed study. “PELAGRA ”将会收集海洋雪,并定期对它进行细致研究。 TED-Ed(视频版) Marine snow is basically organic matter, things like particles of dead algae, plants, and animals, drifting down into the depths and acting as food for deep-sea animals. 这种东西的名字听起来比它实质要美妙很多,海雪是一种有机物质,像死去的海藻或动植物的粒子沉入到深海中。 Scishow 精选系列 Some of it dies and trickles down through the ocean as so-called marine snow, a sort of perpetual rain of organic matter that falls to the seafloor. 有一些会死亡,然后会在海洋中向下移动,也就是所谓的海洋雪,就是有机物不断地像雪花一样飘落到海床。 VOA Standard 2015年10月合集 Marine snow is composed of dead phytoplankton which sort of clump together to form flakes and then they're heavy enough to sink down into the deep ocean. 海洋雪是由已死的浮游植物所组成,并形成类似碎片的聚集体,由于体积过大,它们能够到达深海。 科拉诺斯动画科普 With limited resources in the deep sea, many species feed on animal waste, called marine snow, that rains down from the shallows. 由于深海资源有限, 许多物种以动物排泄物为食,这些排泄物被称为海雪, 从浅水处降下。 开启地球探索之旅 The technical term for this is marine snow, since it mostly comprises microscopic or particulate sized debris, since most of upper reaches are indeed plankton or krill. 它的专业术语是海洋雪,因为它主要由微观或颗粒大小的碎片组成,因为大部分上游确实是浮游生物或磷虾。 202329 At deep--sea trenches, organisms have adapted to the immense pressures and rely on the 'marine snow'-- organic matter that drifts down from the ocean's surface-- for sustenance. 在深海海沟中,生物体已经适应了巨大的压力,并依靠“海洋雪”(从海洋表面漂流下来的有机物)来维持生计。 开启地球探索之旅 Sponges are common, and can grow to over a metre in diameter, as are starfish that scavenge upon the bottom for any marine snow that might have made it through all the ocean layers above. 海绵很常见, 直径可长到一米多,海星也是如此, 它们在海底寻找可能穿过上层海洋层的海雪。
中文百科
海洋雪在深海中,由有机物所组成的碎屑像雪花一样不断飘落,称作海洋雪。海洋雪主要由有机物碎屑所组成,起源于海洋上部透光层的有机物生产活动。 海洋雪的组成包括:已死或将死的动植物(浮游生物)、原生生物(如硅藻)、细菌、粪便颗粒、泥沙和尘土等。“雪花”(多成团或丝)是较小的颗粒被含多糖的黏性物质粘在一起形成的大的聚集体。这种多糖称作“透明胞外聚合物颗粒”(transparent exopolymer particles, TEPs),是由细菌或浮游生物产生的天然聚合物。随时间推移,这些聚集体直径可长到几厘米,需要几周时间才能飘到海底。
英语百科
Marine snow 海洋雪![]() In the deep ocean, marine snow is a continuous shower of mostly organic detritus falling from the upper layers of the water column. It is a significant means of exporting energy from the light-rich photic zone to the aphotic zone below. The term was first coined by the explorer William Beebe as he observed it from his bathysphere. As the origin of marine snow lies in activities within the productive photic zone, the prevalence of marine snow changes with seasonal fluctuations in photosynthetic activity and ocean currents. Marine snow can be an important food source for organisms living in the aphotic zone, particularly for organisms which live very deep in the water column. |
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