[bobthepanda]

The Canaries have 32% of the economy based on tourism, and a good chunk of that depends on the local ecology (scuba, nice beaches, etc.)

If you want to see what a tourism place looks like when you destroy its ecology, you only need look at the abandoned areas around the Salton Sea.

[palmfacehn]

The Salton Sea in its current iteration was created by the failure of an irrigation canal. Before that there was no Salton Sea as we know it or tourist area.

[bobthepanda]

Sure, but that’s beside the point of the question, which is “how do we know salinifying an area enough to kill species is bad”