How do the plants and animals of Douglas Creek survive together?

Bugs in Douglas creek are important because they give animals food like fish, and frogs. If you want to know if your water in Douglas creek is good than you scrape off rocks and see if you can find these bugs. Then that means that your water is very clean because these bugs are very picky about were they live. Now I will list the picky bugs Mayflys, Stoneflys, Dobsonflys, and, Caddisflys. Canopies are good for giving shade to the creek so the sun doesn’t keep beating on the water so much making the water to hot this is important to the fish because fish need to live in a certain amount of temperature so they can live. So if the fish live in water that is to cold for them then they will die and if the fish live in water that is to hot then they will die so that is why they need a certain temperature of water. Human change the creek by throwing their garbage on the ground and they also leave their camping gear junk, going to the bathroom, and leavening the toilet paper on the ground.