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Effects of re-oxygenation and bioturbation by the polychaete Marenzelleria arctia on phosphorus, iron and manganese dynamics in Baltic Sea sediments
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
Stockholm Univ, Sweden.
Stockholm Univ, Sweden; Stockholm Univ, Sweden.
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2018 (English)In: Boreal environment research, ISSN 1239-6095, E-ISSN 1797-2469, Vol. 23, p. 15-28Article in journal (Refereed) Published
Abstract [en]

Sediments underlying hypoxic or anoxic water bodies constitute a net source of phosphorus to the bottom water. This source has the potential to enhance eutrophication. Benthic fluxes of dissolved phosphorus, iron and manganese were measured from hypoxic, normoxic, and normoxic bioturbated by the invasive polychaete Marenzelleria arctia sediment in a mesocosm experiment. The highest benthic phosphorus efflux was detected in mesocosms with the hypoxic treatment. Normoxic, bioturbated sediments led to weaker retention of phosphorus compared to oxic, defaunated sediments. Both iron and manganese fluxes increased under bioturbated conditions compared to defaunated sediments. This study shows that re-oxygenation of previously anoxic coastal sediments enhance phosphorus retention in the sediments. Colonisation by M. arctia induce strong mobilisation of iron and manganese due to its intense bioirrigation, which facilitates organic matter degradation and decreases the phosphorus retention by metal oxides in sediment.

Place, publisher, year, edition, pages
FINNISH ENVIRONMENT INST , 2018. Vol. 23, p. 15-28
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:liu:diva-154853ISI: 000458689100002OAI: oai:DiVA.org:liu-154853DiVA, id: diva2:1293679
Note

Funding Agencies|Swedish EPA "BOX project"; FORMAS projects; Stockholm University; S.U. Baltic Sea Centre

Available from: 2019-03-05 Created: 2019-03-05 Last updated: 2019-03-14Bibliographically approved

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Danielsson, ÅsaRahm, LarsShakeri Yekta, SepehrReyier, Henrik
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Tema Environmental ChangeFaculty of Arts and SciencesDepartment of Water and Environmental Studies
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CiteExportLink to record
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