Oct 21 (Reuters) - Australia's South32 on Monday posted a sharp decline in first-quarter manganese output as its Australia operations for the commodity recorded nil production amid an ongoing recovery plan post a cyclone in March.

The world's biggest producer of manganese logged 597,000 wet metric tons (wmt) of the steel additive for the quarter ended Sept. 30, down from 1.5 million wmt from a year earlier.

That compares with a Visible Alpha consensus estimate of about 527,900 wmt.

(Reporting by Shivangi Lahiri & Sherin Sunny in Bengaluru; Editing by Lisa Shumaker)

((Sherin.Sunny@thomsonreuters.com;))