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Klimaat & Natuur

Primary productivity - momenteel alleen beschikbaar in het Engels     auteurs     19 juli 2016




  • Climate change has led and will lead to changes in the species composition of flora and fauna and thus the properties of the Wadden Sea, such as its carrying capacity for fish and birds
  • The basis of an ecosystem’s carrying capacity is formed by primary production, the process in which microscopic algae use the energy of sunlight for the formation of biomass from CO2, water and nutrients
  • In order to determine the long-term impacts of climate change on primary production, one should, in addition to measuring biomass and production of microalgae in the water and on the tidal flat sediment, also measure the controlling factors for the development of microalgae
  • At present, NIOZ performs long-term field observations on primary production and biomass of pelagic algae at 1 station in the western Wadden Sea, whilst RWS is measuring biomass of pelagic microalgae at 6 stations in the Wadden Sea, including 2 stations in the Ems estuary
  • Several (but not all) driving factors of the biomass and productivity of pelagic and benthic microalgae are measured at more stations in the Wadden Sea
  • Production and biomass of benthic microalgae and grazing pressure by zooplankton are not monitored and cannot currently be derived from existing measurements
  • The optimal design for a monitoring network for the estimation of primary productivity of pelagic and benthic microalgae in marine coastal waters is a combination of field measurements, automatic sampling devices and satellite-derived information