A Field Guide to Clean Drinking Water by Joe Vogel

Author:Joe Vogel
Language: eng
Format: epub, pdf
Publisher: The Experiment
Published: 2019-08-21T16:00:00+00:00

Indicator species

Since we need to assess water quality quickly and safely independent of location, we will examine some fairly stenecious animals that occur globally, are easy to identify, and are also typical for a particular water quality. While water ecologists may spend hours standing knee-deep in water with their nets, catching and identifying everything they can, we will take a more pragmatic approach.

For our purposes, the presence of a large number of individuals from one indicator group typical for good water quality will be sufficient evidence. If we can’t find any, it may mean that the water quality is not good enough for those animals (or that you didn’t look hard enough). We therefore have to lower our water quality assessment to the next level at which we found a few indicator species. The presence of a species representing poor water quality, however, does not necessarily mean that the water quality is poor, as long as there are numerous animals from a species indicating better quality.

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