There a number of threats. We know, for example, that ice is land-like eight months of year. There are recognized transportation routes between communities for harvesting and the ability to get out on the land to do harvesting, going from community to community. For important areas, such as where there are walrus haul-outs or ice floe edges where seals are pupping, if icebreaking or disturbances were taking place at particular times of the year, it would have a negative impact.
On June 6th, 2017. See this statement in context.