English to Spanish Science Zoology environmental surveys

Hi everyone,

Here's a section from an environmental study that I am translating. This section deals with the study of macro-invertebrates to assess the health of the ecosystem. Various advantages of studying macroinvertabrates are listed, among them:

"They also live in contact with sediment where pollutants tend to concentrate, and *taxa and life form response* to pollutants are relatively well established".

Thanks in advance for your help and insight!

Best from Vegas,

Judy Jenner