We know pharmaceuticals are a problem for aquatic organisms and water systems.

我们都知道到药物对于水生生物和供水系统来说都是问题。

For comparison, the researchers also measured mercury concentrations in other aquatic organisms.

研究人员为了进行比较，还测量了其他水生生物中的汞浓度。

Algae is an informal term for a large, diverse group of aquatic organisms that have the ability to conduct photosynthesis.

藻类是一个非正式的术语，指的是大量多样的水生生物，它们可以进行光合作用。