Up 6.4 percent from last year; trade no longer a victim of backlog  Containerized trade is rebounding at the Port of Oakland after two months of decline. The Port said today that cargo volume in March increased 6.4 percent from a year ago. That’s a turnaround from a 31 percent decrease in January and February. “We’re moving in the right direction again,” said Port Maritime Director John Driscoll. “But we’ve still got plenty of work to do to make up for a slow start to the year.” Increased volume signals the likely end to trade slowdowns resulting from recent cargo backlogs at West Coast marine terminals. In February, only 35,923 import containers moved through Oakland. In March the figure jumped to 84,023. Oakland’s March imports increased 39 percent over 2014 totals. Exports declined 16 percent. The Port said exports decreased because of the strong U.S. dollar, which made American goods less affordable overseas. Exports were also constrained by vessels bypassing Oakland to recover time lost at congested Southern California ports. Those ships are now returning to Oakland, providing additional capacity for overseas cargo.