这种鱼以浮游生物为主食。
最早的有性繁殖生物是自由漂浮的浮游生物。
The first organisms that reproduced sexually were free-floating plankton.
海洋中浮游植物的数量在变化。
浮游植物的类型正在发生变化。
浮游植物是生长在海里的微小植物。
Phytoplankton are microscopic plants that grow in the ocean.
但浮游植物易受海洋变暖趋势的影响。
But phytoplankton are vulnerable to the ocean's warming trend.
浮游植物很容易受到海洋变暖趋势的影响。
有些地区虽然富含氮化合物，但浮游生物却很少。
Some areas, though rich in these nitrogen compounds, have few plankton.
然而，浮游植物只在铁含量足够高的地表水中繁殖。
However, phytoplankton flourish only in surface waters where iron levels are sufficiently high.
这种现象的核心是被称为浮游植物的微小海洋微生物。
At the heart of the phenomenon lie tiny marine microorganisms called phytoplankton.
根据浮游植物的种类和浓度，海洋颜色有从绿色到蓝色不等。
Ocean colour varies from green to blue, depending on the type and concentration of phytoplankton.
该模型预测，目前只有少量浮游植物的蓝色区域可能会变得更蓝。
The model projects that currently blue areas with little phytoplankton could become even bluer.
海洋沉积物中浮游生物的这种变化标志着白垩纪和第三纪的分界线。
This change in plankton found in marine deposits is what marks the boundary between the Cretaceous and the Tertiary.
这些营养物质会对海星产生影响，因为它们会增加浮游植物的生长。
These nutrients have an effect on the starfish, because they cause an increase in the growth of phytoplankton.
海马常用尾巴将自己固定在水草或珊瑚枝上，以过往的浮游动物为食。
Anchoring themselves to blades of grass or fingers of coral with their tails, seahorses spend their time feeding on zooplankton.
这本书有许多海洋动物的彩色照片，从浮游生物到小丑鱼乃至逆戟鲸。
This book has large color photographs of sea animals, from plankton to clownfish to orcas.
科学家利用海洋颜色的变化来估计叶绿素含量以及海洋浮游植物的生物量。
Scientists use these changes in ocean color to estimate chlorophyll concentration and the biomass of phytoplankton in the ocean.
这些地区的铁含量特别低，海洋学家推测，铁的缺乏阻碍了浮游生物的繁殖。
These areas have particularly low concentrations of iron, and oceanographers hypothesize that this shortage of iron prevents plankton from thriving.
但在某些水域，如北极水域，气候变暖将使浮游植物的生存条件变得更加恶劣。
But in some waters, such as those of the Arctic, a warming will make conditions worse for phytoplankton.
在世界上所有的海洋，包括北冰洋，尾海鞘都是出没在浮游植物密度最大的水域表面。
Found in all the oceans of the world, including the Arctic Ocean, appendicularians tend to remain near the water's surface where the density of phytoplankton is greatest.
然而，尽管当地铁浓度立即提高，在一个这样的区域实验释放铁化合物却没有产生大量的浮游生物。
However, an experimental release of iron compounds into one such area failed to produce a thriving plankton population, even though local iron concentrations increased immediately.
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