Detection of parameteres influencing isotopic composition in kelps


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Cornelia.Buchholz [ at ] awi.de

Abstract

Kelp derived detritus is a potential food item at the base level of marine food webs. A good knowledge of the factors that influence stable isotope composition in kelps is essential for reliable food web models: The variation of stable isotope composition was analysed in three kelp species growing in Kongsfjorden, Svalbard. The parameters considered were depth, age, and algal anatomy: Between 15 and 2.5 m depth, towards higher photo fluence rate, Alaria esculenta was gradually enriched in δ13C while δ15N did not change. 2&3-year-old algae had significantly higher δ15N values in their blades than 5&6-year-old ones. A two factor analysis did not show any interactive effects between depth and age class. A. esculenta as well as Saccharina latissima and Laminaria digitata exhibited enrichment in heavy carbon isotopes in the blades.



Item Type
Conference (Poster)
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Not peer-reviewed
Publication Status
Published
Event Details
17. Tagung der Sektion Phykologie in der Deutschen Botansichen Gesellschaft, 11 Mar 2018 - 14 Mar 2018, Berchtesgarden, Haus der Berge.
Eprint ID
46831
Cite as
Buchholz, C. , Lebreton, B. , Bartsch, I. and Wiencke, C. (2018): Detection of parameteres influencing isotopic composition in kelps , 17. Tagung der Sektion Phykologie in der Deutschen Botansichen Gesellschaft, Berchtesgarden, Haus der Berge, 11 March 2018 - 14 March 2018 .


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