Insects are fairly low down (on) the food chain.

在食物链中，昆虫是相当低的一级生物。

The whole food chain is affected by the overuse of chemicals in agriculture.

整个食物链因农业中过度使用化学制品而受到影响。

This poses a threat to agriculture and the food chain, and consequently to human health.

这会对农业和食物链造成威胁，由此而危及人的健康。

The effect was to disrupt the food chain, starving many animals and those that preyed on them.

后果是打断食物链，使许多动物和捕食它们的动物饿死。

What about their food chain?

他们的食物链怎么样？