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Temporal dietary shift in jellyfish revealed by stable isotope analysis

A temporal change in the stable isotope (SI) composition of jellyfish in the Kiel Fjord, Western Baltic Sea, was documented by analyzing δ(13)C, δ(15)N and δ(34)S of bell tissue of Aurelia aurita and Cyanea capillata in the period between June and October 2011. A strong and significant temporal chan...

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Autores principales: Javidpour, Jamileh, Cipriano-Maack, Ashlie N., Mittermayr, Agnes, Dierking, Jan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4841851/
https://www.ncbi.nlm.nih.gov/pubmed/27194816
http://dx.doi.org/10.1007/s00227-016-2892-0
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author Javidpour, Jamileh
Cipriano-Maack, Ashlie N.
Mittermayr, Agnes
Dierking, Jan
author_facet Javidpour, Jamileh
Cipriano-Maack, Ashlie N.
Mittermayr, Agnes
Dierking, Jan
author_sort Javidpour, Jamileh
collection PubMed
description A temporal change in the stable isotope (SI) composition of jellyfish in the Kiel Fjord, Western Baltic Sea, was documented by analyzing δ(13)C, δ(15)N and δ(34)S of bell tissue of Aurelia aurita and Cyanea capillata in the period between June and October 2011. A strong and significant temporal change in all SI values of A. aurita was found, including an increase of ~3 ‰ in δ(13)C, a decrease of ~4 ‰ in δ(15)N and sharp decline of ~7 ‰ in δ(34)S. While knowledge gaps in jellyfish isotope ecology, in particular the lack of reliable trophic enrichment factors, call for a conservative interpretation of our data, observed changes in particular in δ(34)S, as indicated by means of a MixSIR mixing model, would be consistent with a temporal dietary shift in A. aurita from mesozooplankton (>150 µm) to microplankton and small re-suspended particles (0.8–20 µm) from the benthos. Presence of a hitherto unidentified food source not included in the model could also contribute to the shift. During the 2-month occurrence of C. capillata, its isotope composition remained stable and was consistent with a mainly mesozooplanktonic diet. Mixing model output, mainly driven by δ(34)S values, indicated a lower proportion of A. aurita in the diet of C. capillata than previously reported, and thus to a potentially lesser importance of intraguild predation among jellyfish in the Kiel Fjord. Overall, our results clearly highlighted the potential for substantial intraspecific isotopic seasonal variation in jellyfish, which should be taken into account in future feeding ecology studies on this group. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00227-016-2892-0) contains supplementary material, which is available to authorized users.
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spelling pubmed-48418512016-05-16 Temporal dietary shift in jellyfish revealed by stable isotope analysis Javidpour, Jamileh Cipriano-Maack, Ashlie N. Mittermayr, Agnes Dierking, Jan Mar Biol Original Paper A temporal change in the stable isotope (SI) composition of jellyfish in the Kiel Fjord, Western Baltic Sea, was documented by analyzing δ(13)C, δ(15)N and δ(34)S of bell tissue of Aurelia aurita and Cyanea capillata in the period between June and October 2011. A strong and significant temporal change in all SI values of A. aurita was found, including an increase of ~3 ‰ in δ(13)C, a decrease of ~4 ‰ in δ(15)N and sharp decline of ~7 ‰ in δ(34)S. While knowledge gaps in jellyfish isotope ecology, in particular the lack of reliable trophic enrichment factors, call for a conservative interpretation of our data, observed changes in particular in δ(34)S, as indicated by means of a MixSIR mixing model, would be consistent with a temporal dietary shift in A. aurita from mesozooplankton (>150 µm) to microplankton and small re-suspended particles (0.8–20 µm) from the benthos. Presence of a hitherto unidentified food source not included in the model could also contribute to the shift. During the 2-month occurrence of C. capillata, its isotope composition remained stable and was consistent with a mainly mesozooplanktonic diet. Mixing model output, mainly driven by δ(34)S values, indicated a lower proportion of A. aurita in the diet of C. capillata than previously reported, and thus to a potentially lesser importance of intraguild predation among jellyfish in the Kiel Fjord. Overall, our results clearly highlighted the potential for substantial intraspecific isotopic seasonal variation in jellyfish, which should be taken into account in future feeding ecology studies on this group. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00227-016-2892-0) contains supplementary material, which is available to authorized users. Springer Berlin Heidelberg 2016-04-22 2016 /pmc/articles/PMC4841851/ /pubmed/27194816 http://dx.doi.org/10.1007/s00227-016-2892-0 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Original Paper
Javidpour, Jamileh
Cipriano-Maack, Ashlie N.
Mittermayr, Agnes
Dierking, Jan
Temporal dietary shift in jellyfish revealed by stable isotope analysis
title Temporal dietary shift in jellyfish revealed by stable isotope analysis
title_full Temporal dietary shift in jellyfish revealed by stable isotope analysis
title_fullStr Temporal dietary shift in jellyfish revealed by stable isotope analysis
title_full_unstemmed Temporal dietary shift in jellyfish revealed by stable isotope analysis
title_short Temporal dietary shift in jellyfish revealed by stable isotope analysis
title_sort temporal dietary shift in jellyfish revealed by stable isotope analysis
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4841851/
https://www.ncbi.nlm.nih.gov/pubmed/27194816
http://dx.doi.org/10.1007/s00227-016-2892-0
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