A large, fragmenting iceberg has fuelled a surge in phytoplankton abundance. The melting, splintering iceberg is introducing vital nutrients in the region. A large, fragmenting iceberg has fuelled a surge in phytoplankton abundance. The melting, splintering iceberg is introducing vital nutrients in the region. New Delhi: An iceberg designated as A-23A calved off from Antarctica over 40 years ago, and ha... [1973 chars]