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About the HIMOM project (running from 2002-2005) Jacco Kromkamp and Rodney Forster at NIOO-CEME

About the HIMOM project (running from 2002-2005) Jacco Kromkamp and Rodney Forster at NIOO-CEME We are developing a system of Hierarchical Monitoring Methods for use in European estuaries

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About the HIMOM project (running from 2002-2005) Jacco Kromkamp and Rodney Forster at NIOO-CEME

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  1. About the HIMOM project (running from 2002-2005) • Jacco Kromkamp and Rodney Forster at NIOO-CEME • We are developing a system of Hierarchical Monitoring Methods for use in European estuaries • This toolkit includes calibrated methods for measuring sediment properties such as microalgal biomass and photosynthesis • We are using remote sensing to estimate primary production of estuaries around the North Sea • We work together with DIVPROD to quantify ecosystem function and microphytobenthic activity on intertidal flats of the Westerschelde estuary • A model has been developed to provide accurate estimates of daily primary productivity at each of the DIVPROD collection sites

  2. A detailed sediment optical model lies behind the primary production calculations Benthic chlorophyll concentration in upper 1 cm up to 10 000 mg m-3 Highest natural phytoplankton concentrations 250 mg m-3 Forster & Kromkamp 2004

  3. 3) Chl-depth 4) Irradiance-depth 1) PAR / SST - time High resolution primary production model (1) Light and temperature at the sediment surface (2) Vertical profile of microalgae chlorophyll with depth (3) Vertical profile of irradiance in the first 1mm of the sediment (4) Site-specific photosynthetic parameters are measured in the lab during each sampling event

  4. 09-2003 sampling Photosynthetic rates are integrated over depth and time ΣtΣz P to obtain daily gross primary production (units: g C m-2 d-1)

  5. Daily primary production per unit biomass shows a linear relationship with light availability MPB phytoplankton Light use efficiency of MPB is higher than that of phytoplankton

  6. CASI chlorophyll distribution of the Molenplaat

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