1. Tidal marshes and biogenic silica recycling at the land-sea interface
- Author
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Eric Struyf, Patrick Meire, Stefan Van Damme, Jack J. Middelburg, Henricus T. S. Boschker, K. Bal, Britta Gribsholt, Armel Dausse, University of Antwerp (UA), Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO), Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), NIOO-KNAW Netherlands Institute of Ecology, NIOO-KNAW, Université de Rennes (UR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Briand, Valerie, Ecosystems Studies, and Marine Microbiology
- Subjects
0106 biological sciences ,Marsh ,010504 meteorology & atmospheric sciences ,Dissolved silica ,Aquatic Science ,Biogenic silica ,Marshes ,Oceanography ,01 natural sciences ,12. Responsible consumption ,Water balance ,Belgium, Zeeschelde ,Ecosystem ,14. Life underwater ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,0105 earth and related environmental sciences ,Hydrology ,geography ,geography.geographical_feature_category ,Tidal marshes ,010604 marine biology & hydrobiology ,Estuary ,[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment ,6. Clean water ,13. Climate action ,Brackish marsh ,Salt marsh ,Biogenic deposits ,Environmental science - Abstract
We studied the seasonal exchange of biogenic silica and dissolved silica between a freshwater and a saltwater tidal marsh and the nearby coastal waters. From both tidal marshes export of dissolved Si (DSi) was observed, while concurrently biogenic Si (BSi) was imported along with suspended solids. The export of DSi was highest (23.4 % and 123.8 % in the freshwater and saltwater marsh respectively) in summer when dissolved Si concentrations were low in the nearby coastal waters. Combined data from both marshes suggested a logarithmic decrease in DSi export with increasing DSi concentrations in the inundating waters. BSi import was observed year round in the freshwater marsh, but only in summer in the saltwater marsh. The results show that dissolved silica recycling from tidal marshes, both freshwater and saltwater, contributes significantly to estuarine Si availability in summer and provide new insight in the link between tidal marshes and secondary production in nearby coastal waters.
- Published
- 2006