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.
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.
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.
食物链的任何短缺都很可能导致整个生态系统不稳定，也许会形成新的食物链，只由一个或两个物种支配，如水母。
Any shortening of the food chain is likely to destabilise entire ecosystems, possibly leading to new ones in which just one or two species, such as jellyfish, predominate.
植物是各类动物的食源，外来者蔓延的威胁抑制它们生长，生态系统食物链的稳定性日渐堪忧。
The spread threatens to smother vegetation that is a source of food for a variety of animals, raising concerns about the stability of the ecosystem's food chain.
位于食物链顶端的王企鹅为保证南极生态环境的健康做出了很大的贡献。
Sitting near the top of the food chain, the king penguins are useful markers for the health of the rest of the Antarctic ecosystem.
为海洋生态系统提供架构的的食物链，是难以监测和不断变化的。
The thing that provides structure in open-water ecosystems is the food-web, which is hard to observe and malleable.
“考虑到食物链基础长达一个世纪的减少所带来的潜在影响，这非常令人不安，”研究报告的主要作者，海洋生态学家Daniel博伊斯说。
"It's very disturbing to think about the potential implications of a century-long decline of the base of the food chain," said lead author Daniel Boyce, a Marine ecologist.
自1990年代起，科学家和区域性管理机构就已经开始了数据收集工作，通过对“食物链等级”上不同种群间的生态平衡变化进行定量研究。
Since the late 1990s, scientists and regional management organisations have used catch data to measure changes in the balance of species across so-called "trophic levels."
在大自然中，就是因为有着各式各样的微生物，发挥着不同的效用，透过生物食物链的机制才能使得我们的生态系统维持平衡。
In nature, there exists many types of microbes and each plays a role in balancing our entire ecosystem through the activity of the biological food web.
森林“病害”是森林生态系统中生物之间食物链关系的一种自然现象。
Forest disease is a kind of natural phenomenon between living things in food chain.
在更大的尺度上，食物链与生态系统则相当于物种所构成的网络。
On a larger scale, food webs and ecosystems can be represented as networks of species.
为了证明本文设计的模型的现实可行性，文章将电子废弃物回收产业链模型与生态系统中的食物链模型进行了对比。
In order to prove that this model is practical and workable, the thesis compared the recovery chain model of electronic waste with food chain in ecosystem.
足够的垃圾倾倒入水中，最终破坏了食物链和原因(理论上)生态系统的崩溃。
Enough junk dumped into the water eventually destroys the food chain and causes (theoretically) ecosystem collapse.
它以生态系统中能量多级利用和物质循环再生为基本原理，按照这一原理，就可以合理设计食物链。
It takes advantages of the basic ecosystem principle of multi-level energy exploitation and substance recycling to reasonably design food chains.
食物链是生态系统的重要组成部分和存在形式。
Food chains are the primary components and existing form of ecosystem.
该模型采用比较典型的草原生态系统中的食物链作为建模对象。
The modeling object is the food chain in grassland ecosystem which is a representative one.
即使一个国家的农业生态系统以其一望无际的小麦而闻名，但从小型农场到大型发电厂，食物链中的所有因素都需要共存。
Even in the agricultural ecosystem of a country renowned for endless fields of wheat, there is a coexistence of all elements of the food chain, from small farms to large power plants.
小型哺乳动物和土壤动物是陆地生态系统食物链中重要环节，在生物指示研究中具有十分重要的作用。
Small mammals and soil animals are key links of trophic chains in terrestrial eco-systems, and play very important roles in bio-indicative studies.
研究结果证明，施肥对茶园生态系统的整个食物链产生深刻的影响。
This study demonstrated that short-term fertilizer application affected the entire food chain in the tea plantation ecosystem. 6.
研究结果证明，施肥对茶园生态系统的整个食物链产生深刻的影响。
This study demonstrated that short-term fertilizer application affected the entire food chain in the tea plantation ecosystem. 6.
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