Again, to go back, section 35(1) sets out the conditions that prompt the minister to want the designation, so not every marine protected area would be created for the purpose of protecting its ecological integrity.
The definition of “ecological integrity” encompasses what you're saying in terms of it is an evolving condition so that the natural processes are understood to be evolving. To go back to the example of the Hecate Strait, as you say, there is nothing untouched by human activity, and if we start talking about ocean acidification, all bets are off on marine protected areas, but I'm going to stay away from ocean acidification for the moment and use the example of the Hecate Strait.
You have shipping. It's not disturbing the structures of the corals.