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Different fractions of polyunsaturated aldehydes (PUAs) at the three sites: (A) averaged particulate PUA (pPUA of large-size phytoplankton) expressed as pmol from cells in 1 L at 5 m and deep chlorophyll maximum (DCM). (B) pPUA normalized by large-size phytoplankton cell abundance (fg PUA·cell−1) at 5 m and DCM; (C) averaged vertical dPUA (pM) at the three sites. C7: 2E,4E/Z-heptadienal; C8: 2E,4E/Z-octadienal; C10: 2E,4E/Z-decadienal; TPUA: total PUA.
