Interior Secretary Ryan Zinke has recommended cutbacks or other changes to nearly half the geographic national monuments he recently reviewed at the request of President Donald Trump, according to a report sent to the White House and reviewed by The Wall Street Journal.

The report recommends reducing the boundaries of the Bears Ears and Grand Staircase-Escalante preserves in Utah, and reopening hundreds of thousands of square miles of protected oceans in both the Pacific and Atlantic to commercial fishing—in actions numerous...