鱼类正在以塑料微粒为食，以为这是浮游生物或者其它食物，于是塑料就进入了海洋中的食物链。
The fish are consuming small particles of plastic thinking it is plankton or other food then the plastic enters the food chain of the ocean.
在海洋生态系统中，鲨鱼处于食物链的顶端。
Sharks are at the top of the food chain in the ocean's ecosystem.
食物链等级体系中的高等级物种平均捕获率(而捕获正在并将持续进行)处于持续上升态势之中——按照所谓食物链等级理论，这应当意味着海洋生态系统的健康平衡发生了变化。
The average trophic level of what is being caught is rising — and this in principle should indicate improving ecosystem health.
浮游植物的产量是食物链的基础，海洋中的所有生物都有赖于此。
Phytoplankton productivity is the base of the food web, and all life in the sea depends on it.
由于浮游生物是整个海洋食物链的基础，所以南大西洋在海洋生态系统中起着重要作用。
Because plankton are the base of the Marine food chain, the South Atlantic Ocean supports a rich Marine ecosystem.
丹尼尔·西格曼：海藻生长过程中需要氮，而海藻本身为海洋食物链中的其他生物提供养分。
Daniel Sigman: Algae require nitrogen to grow, and their bodies, in turn, fuel the rest of the ocean food web.
这些海藻是海洋中绝大多数食物链的基础：一些小动物吃海藻，大些的动物又吃了小动物。
These algae are the basis of most food chains in the sea-being eaten by tiny animals that are, in turn, eaten by larger ones.
绝大部分生物都是食物链中的一部分，它是以地球内部特殊部位缓慢渗出的甲烷为第一营养级，而这些气体经常在海洋底部出现。
Most, but not all. Some creatures are part of food chains that begin with methane gas which seeps from the Earth's interior in particular places, frequently at the bottom of the sea.
例如，过多的光照会减缓海洋中某些特定种类海藻的生长速度，这些海藻为大型生物体提供食物，他们的缺乏将会导致食物链的混乱。
For instance, more sunlight can slow the growth of certain species of ocean algae that provide food for larger organisms-and whose absence can have reverberations up the food chain.
例如，过多的光照会减缓海洋中某些特定种类海藻的生长速度，这些海藻为大型生物体提供食物，他们的缺乏将会导致食物链的混乱。
For instance, more sunlight can slow the growth of certain species of ocean algae that provide food for larger organisms-and whose absence can have reverberations up the food chain.
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