Instantaneous Effects of Sediment Resuspension on Inorganic and Organic Benthic Nutrient Fluxes at a Shallow Water Coastal Site in the Gulf of Finland, Baltic Sea

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dc.contributor.author Niemisto, Juha
dc.contributor.author Lund-Hansen, Lars Chresten
dc.date.accessioned 2019-12-09T12:54:02Z
dc.date.available 2019-12-09T12:54:02Z
dc.date.issued 2019-12
dc.identifier.citation Niemisto , J & Lund-Hansen , L C 2019 , ' Instantaneous Effects of Sediment Resuspension on Inorganic and Organic Benthic Nutrient Fluxes at a Shallow Water Coastal Site in the Gulf of Finland, Baltic Sea ' , Estuaries and Coasts , vol. 42 , no. 8 , pp. 2054-2071 . https://doi.org/10.1007/s12237-019-00648-5
dc.identifier.other PURE: 128806107
dc.identifier.other PURE UUID: 8efc277f-2245-4b92-adbd-be13304fbef6
dc.identifier.other WOS: 000497274900006
dc.identifier.other ORCID: /0000-0003-3516-5596/work/66032893
dc.identifier.uri http://hdl.handle.net/10138/308012
dc.description.abstract Climate change is leading to harsher resuspension events in shallow coastal environments influencing benthic nutrient fluxes. However, we lack information on the quantitative connection between these fluxes and the physical forces. Two identical experiments that were carried out both in May and August provided novel knowledge on the instantaneous effects of resuspension with known intensity on the benthic dissolved inorganic (phosphate: DIP, ammonium: NH4+, nitrite+nitrate: NOx, silicate, DSi) and organic nutrient (phosphorus: DOP, nitrogen: DON, carbon: DOC) fluxes in the shallow soft bottoms of the archipelago of Gulf of Finland (GoF), Baltic Sea. Resuspension treatments, as 2 times the critical shear stress, induced effluxes of one to two orders of magnitude higher than the diffusive fluxes from the studied oxic bottoms. The presence of oxygen resulted in newly formed iron oxyhydroxides and the subsequent precipitation/adsorption of the redox-dependent nutrients (DIP, DSi, organic nutrients) affecting their fluxes. Resuspension-induced NH4+ and NOx fluxes were associated with the organic content of sediments showing the highest values at the organic rich sites. NH4+ showed the strongest responses to resuspension treatments in August, but NOx at the time of high oxygen concentrations in near-bottom water in May. Foreseen increases in the frequency and intensity of resuspension events due to climate change will most likely enhance the internal nutrient loading of the studied coastal areas. The fluxes presented here, connected to known current velocities, can be utilized in modeling work and to assess and predict the internal nutrient loading following climate change. en
dc.format.extent 18
dc.language.iso eng
dc.relation.ispartof Estuaries and Coasts
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Sediment resuspension
dc.subject Benthic flux
dc.subject Inorganic and organic nutrients
dc.subject Critical shear stress
dc.subject CONTINENTAL-MARGIN
dc.subject EARLY DIAGENESIS
dc.subject CLIMATE-CHANGE
dc.subject PORE-WATER
dc.subject CARBON
dc.subject OXYGEN
dc.subject PHOSPHORUS
dc.subject TRANSPORT
dc.subject MATTER
dc.subject BIOTURBATION
dc.subject 1172 Environmental sciences
dc.title Instantaneous Effects of Sediment Resuspension on Inorganic and Organic Benthic Nutrient Fluxes at a Shallow Water Coastal Site in the Gulf of Finland, Baltic Sea en
dc.type Article
dc.contributor.organization Tvärminne Zoological Station
dc.contributor.organization Ecosystems and Environment Research Programme
dc.contributor.organization Lake Ecosystem Dynamics
dc.contributor.organization Faculty of Biological and Environmental Sciences
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1007/s12237-019-00648-5
dc.relation.issn 1559-2723
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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