One of the things gaining much attention in recent memory is water temperature. With brook trout and Atlantic salmon, which are cold water fish, the temperature is such that many of the pools are in critical states. There's now a mechanism where at critical thresholds we have pool closures throughout the watershed, even during the fishing season. That has been a very significant and noteworthy change from the years where it wasn't as bad, the rivers being shallower. With the increase of forestry practices, with the greater input of warmer water into the system, water temperatures are our major problem.
On September 29th, 2016. See this statement in context.