Maybe, maybe not. In fisheries highly dependent on introduced species it could be worrisome.
I spent yesterday afternoon on a highly flood impacted stewardship creek. On this ck last yr I averaged almost 30 brook trout per trip, yesterday I caught 9. If I punt the rainbows caught, last yr I averaged 3-4 cutthroat per trip. Yesterday I caught 7 cutthroat and zero r'bows. It's all conjecture based on one 4 hr trip on one ck by a loudmouthed redneck but it appears the introduced species may have taken a *hit kicking.
If anyone thinks this flood is an unusual occurrence for Southern Alberta, y'all better think again. Yesterday I looked at a 15 foot fresh cut creek bank that was 2' of silt over 2' of gravel over 2' of silt over and over down to where I was standing. Only one thing does that, repeated bigassed floods.