Tribune Co. has announced it will cut between 100 and 150 jobs at its Los Angeles Times newspaper operation.

The cuts come as part of a larger downsizing at the Chicago-based media company. All together, management plans to cut 400 to 500 jobs, or 2 percent of the corporate work force, through layoffs, voluntary buyouts, and attrition, according to a story today in the Times. The job reductions will occur before the end of March.

The newspaper industry continues to struggle with decreasing circulation and advertising revenues, and Tribune will make all its cutbacks at its nine newspapers. In contrast, the broadcast half of the business including Los Angeles station KTLA-TV (Channel 5) will not be affected.

The latest round of cuts comes less than a month after James O’Shea, the paper’s editor since November of 2006, stepped down as head of the paper due to opposition to Tribune’s plans to make deeper budget and job cuts.

The Times has lost about 20 percent of its circulation in the last eight years, and its newsroom payroll has dropped 25 percent.