4.7 Article

Spatiotemporal variability in microphytobenthic primary production across bare intertidal flat, saltmarsh, and mangrove forest of Asia and Australia

期刊

MARINE POLLUTION BULLETIN
卷 151, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2019.110707

关键词

Primary productivity; Benthic microalgae; Halophytes; Coastal ecosystem; Tidal flat ecology; Asia

资金

  1. Korea Maritime Institutes (KMI)
  2. Ministry of Oceans and Fisheries of Korea (MOF) [20170325, 20170318]

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The ecological role of intertidal microphytobenthos (MPB) is increasingly recognized in coastal production systems. MPB primary production (PP) measured in coastal wetlands of Korea, Cambodia, and Australia confirmed large variability at the global scale. Surprisingly, MPB biomass in mangrove forests almost doubled those measured in nearby bare tidal flats. However, MPB productivity (P-b) in vegetated habitats was significantly reduced (by similar to 50%) compared to that on bare tidal flats. Extensive measurements of MPB biomass, PP, and P-b across 12 Korean tidal flats revealed large spatiotemporal variations, suggesting complex sediment-MPB coupled dynamics. The key factors included sediment type, tide, bed elevation, irradiation, temperature, and vegetation. Winter MPB blooms and the elevated P-b seem to be unique characteristics of the Korean intertidal flats. The present study provides the baseline data of MPB PPs in mudflat, saltmarsh, and mangrove habitats in the highly productive zones of the Western Indo-Pacific Rim.

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