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dc.date.accessioned2013-03-12T09:03:56Z
dc.date.available2013-03-12T09:03:56Z
dc.date.issued2009en_US
dc.date.submitted2009-06-22en_US
dc.identifier.citationRotstigen, Anniken Birkelund. Benthic foraminifera as a proxy for natural versus anthropogenic environmental change in the German Bight, North Sea. Masteroppgave, University of Oslo, 2009en_US
dc.identifier.urihttp://hdl.handle.net/10852/12544
dc.description.abstractThe Helgoland mud area in the German Bight is one of few sediment depocenters in the North Sea. It is therefore a suitable site to study long-term effects of anthropogenic pollution and/or natural environmental change. The high sedimentation rate in the area provides a high resolution for historical reconstructions. A five meter long core from the Helgoland mud area in the German Bight, North Sea, covering approximately the last 1000 years was investigated for benthic foraminifera. A pre- anthropogenic fauna, dominated by Nonion cf. depressulum, existed in the interval prior to the 19th century. It was intercepted by opportunistic species in periods with extremer conditions caused by lower or higher salinity levels. These opportunistic assemblages were found to be dominated by either Ammonia tepida or Elphidium excavatum. Since the beginning of the 19th century the fauna, indicating anthropogenic changes in river- runoff and nutrient fluxes, is dominated by Elphidium excavatum. During these last 200 years a much higher percentage of abnormal test deformation and indications for eutrophication caused by increasing organic matter content were found.eng
dc.language.isoengen_US
dc.subjectmikropaleontologi bentiske foraminifera antropogene miljøforandringer Nordsjøen Tyskebuktaen_US
dc.titleBenthic foraminifera as a proxy for natural versus anthropogenic environmental change in the German Bight, North Sea : A record over the last 1000 yearsen_US
dc.typeMaster thesisen_US
dc.date.updated2009-07-08en_US
dc.creator.authorRotstigen, Anniken Birkelunden_US
dc.subject.nsiVDP::450en_US
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Rotstigen, Anniken Birkelund&rft.title=Benthic foraminifera as a proxy for natural versus anthropogenic environmental change in the German Bight, North Sea&rft.inst=University of Oslo&rft.date=2009&rft.degree=Masteroppgaveen_US
dc.identifier.urnURN:NBN:no-22143en_US
dc.type.documentMasteroppgaveen_US
dc.identifier.duo92985en_US
dc.contributor.supervisorGerhard Schmiedl (University of Hamburg), Elisabeth Alve (UiO)en_US
dc.identifier.bibsys092775810en_US
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/12544/1/msc-ABRotstigen_elektronisk.pdf


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