Influence of allochthonous dissolved organic matter on pelagic basal production in a northerly estuary

Show simple item record Andersson, A. Brugel, S. Paczkowska, J. Rowe, O.F. Figueroa, D. Kratzer, S. Legrand, C. 2018-04-25T15:12:01Z 2018-04-25T15:12:01Z 2018-05-01
dc.identifier.citation Andersson , A , Brugel , S , Paczkowska , J , Rowe , O F , Figueroa , D , Kratzer , S & Legrand , C 2018 , ' Influence of allochthonous dissolved organic matter on pelagic basal production in a northerly estuary ' , Estuarine, Coastal and Shelf Science , vol. 204 , pp. 225-235 .
dc.identifier.other PURE: 100638216
dc.identifier.other PURE UUID: 8f4b1e66-43f6-4ede-ab25-ec8bf092a899
dc.identifier.other RIS: urn:D977A5BE32EF2A0550296EBF4A4BE2A3
dc.identifier.other Scopus: 85043270673
dc.identifier.other WOS: 000429757300020
dc.description.abstract Phytoplankton and heterotrophic bacteria are key groups at the base of aquatic food webs. In estuaries receiving riverine water with a high content of coloured allochthonous dissolved organic matter (ADOM), phytoplankton primary production may be reduced, while bacterial production is favoured. We tested this hypothesis by performing a field study in a northerly estuary receiving nutrient-poor, ADOM-rich riverine water, and analyzing results using multivariate statistics. Throughout the productive season, and especially during the spring river flush, the production and growth rate of heterotrophic bacteria were stimulated by the riverine inflow of dissolved organic carbon (DOC). In contrast, primary production and photosynthetic efficiency (i.e. phytoplankton growth rate) were negatively affected by DOC. Primary production related positively to phosphorus, which is the limiting nutrient in the area. In the upper estuary where DOC concentrations were the highest, the heterotrophic bacterial production constituted almost 100% of the basal production (sum of primary and bacterial production) during spring, while during summer the primary and bacterial production were approximately equal. Our study shows that riverine DOC had a strong negative influence on coastal phytoplankton production, likely due to light attenuation. On the other hand DOC showed a positive influence on bacterial production since it represents a supplementary food source. Thus, in boreal regions where climate change will cause increased river inflow to coastal waters, the balance between phytoplankton and bacterial production is likely to be changed, favouring bacteria. The pelagic food web structure and overall productivity will in turn be altered. (C) 2018 The Authors. Published by Elsevier Ltd. en
dc.format.extent 11
dc.language.iso eng
dc.relation.ispartof Estuarine, Coastal and Shelf Science
dc.rights cc_by_nc_nd
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 1172 Environmental sciences
dc.subject Primary and bacterial production
dc.subject Coastal areas
dc.subject Estuary
dc.subject Allochthonous dissolved organic matter
dc.subject Northern Baltic Sea
dc.subject CARBON
dc.subject FOOD-WEB
dc.subject BALTIC SEA
dc.title Influence of allochthonous dissolved organic matter on pelagic basal production in a northerly estuary en
dc.type Article
dc.contributor.organization Sari Timonen / Research Group
dc.contributor.organization Department of Food and Nutrition
dc.description.reviewstatus Peer reviewed
dc.relation.issn 0272-7714
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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