Oil rises on signs recent low prices crimping U.S. output; but economic worries weigh

SEOUL (Reuters) - Oil markets rose on Monday on signs that the recent price plunge may start crimping supply from the United States, currently the world's biggest crude producer, though concerns about the global economy continued to weigh. International benchmark Brent crude futures had risen 30 cents, or 0.56 percent, to $54.12 a barrel by 0744 GMT, at one point climbing as far as $54.66.U.S. West Texas Intermediate (WTI) crude futures were up 15 cents, or 0.33 percent, at $45.74 a barrel...