This week the state announced a slate of new restrictions, including outright closures, for some of the top trout streams.

And a new coalition of businesses, fly fishing guides and environmentalists warned that the severe drought may not be a temporary problem and that the state’s fisheries could be nearing collapse.

The coalition, which includes Orvis, the fly fishing company, and the clothing manufacturer Patagonia, sent Gov. Greg Gianforte a letter Wednesday seeking the creation of a task force to address the decline of the fisheries.