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Temporala och spatiala trender i föreslagna baslinjeorganismer för implementering av stabila isotoper i miljögiftsövervakningen
Executive, Universitet, Stockholms universitet, SU, Stockholms universitet, institutionen för ekologi, miljö och botanik.
Executive, Naturhistoriska riksmuseet, NRM.
Executive, Naturhistoriska riksmuseet, NRM.
Executive, Naturhistoriska riksmuseet, NRM.
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2019 (Swedish)Report (Other academic)Alternative title
: Long-term changes in stable carbon and nitrogen isotopes in Blue mussels from Kvädöfjärden, Baltic Proper (1981-2017), and spatial comparisons of the isotope composition in Blue mussel and the Baltic clam from 13 stations along the Swedish coast (2015-2017) (English)
Abstract [en]

The report summarises the long-term changes in the stable isotope composition of Blue mussels (Mytilus edulis) from Kvädöfjärden (1981-2017) and the spatial variation in the isotope composition in Blue mussels and the Baltic clam, Limecola balthica (syn. Macoma balthica), from 14 stations throughout the Baltic Proper (coast and offshore stations) and the west coast of Sweden.

Time series and the spatial variability of analysed isotopes in Blue mussels and the Baltic clam are presented.

The δ13C values were rather stable over time and the year-to-year variation corresponds well to observations in the Askö area, suggesting the two reference stations are rather similar regarding ultimate carbon sources. However, the pattern for δ15N increased over time in Kvädöfjärden (although not during the last 25 years). The difference in δ15N between years in Kvädöfjärden was sometimes equivalent to one trophic level (i.e. a trophic shift of 3.4 per mill).

Spatial comparisons of the isotope composition in mussels revealed large differences (equivalent to the trophic shift) among stations and between species, highlighting the need for site-specific isotope baselines when normalizing contaminant data to a specific trophic position according to the WFD (Water Framework Directive).

Place, publisher, year, edition, pages
Stockholm: Stockholms Universitet , 2019. , p. 10
Keywords [sv]
Kvädöfjärden, Kas-Ängsfjärden, Långvinds-Skärsåfjärden, Gaviksfjärden, Norrbyn (Örefjärden), Östergarnsholm, Simpnäsklubb, Dragviksfjärden, Högby Fyr, Utlängan, Abbekås, Landskrona, Kullen, Glommen, stabila isotoper, kol, kväve, tidstrender, spatiala trender, blåmussla, östersjömussla, baslinje
National Category
Environmental Sciences
Research subject
Finance, National; Miljöövervakning, Coast and sea; Environmental Objectives, A Non-Toxic Environment
Identifiers
URN: urn:nbn:se:naturvardsverket:diva-8106OAI: oai:DiVA.org:naturvardsverket-8106DiVA, id: diva2:1313150
Available from: 2019-05-02 Created: 2019-05-02 Last updated: 2019-05-02

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Stockholms universitet, institutionen för ekologi, miljö och botanikNaturhistoriska riksmuseet, NRM
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