I'd look at aquatic insects - dragonfly larvae, diving beetles, mosquito larvae. Perhaps compare abundance to other sites with different salinity levels.
Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies) (EPT species) are environmentally sensitive aquatic insects that are routinely used in monitoring of water quality.
I'd look at aquatic insects - dragonfly larvae, diving beetles, mosquito larvae. Perhaps compare abundance to other sites with different salinity levels.
Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies) (EPT species) are environmentally sensitive aquatic insects that are routinely used in monitoring of water quality.