Temporal dietary shift in jellyfish revealed by stable isotope analysis

Javidpour, Jamileh; Cipriano Maack, Ashlie N.; Mittermayr, Agnes; Dierking, Jan

Temporal dietary shift in jellyfish revealed by stable isotope analysis

dc.contributor.author	Javidpour, Jamileh
dc.contributor.author	Cipriano Maack, Ashlie N.
dc.contributor.author	Mittermayr, Agnes
dc.contributor.author	Dierking, Jan
dc.contributor.funder	Deutsche Forschungsgemeinschaft	en
dc.contributor.funder	European Commission	en
dc.contributor.funder	Bundesministerium für Bildung und Forschung	en
dc.date.accessioned	2019-10-25T11:38:22Z
dc.date.available	2019-10-25T11:38:22Z
dc.date.issued	2016-04-22
dc.description.abstract	A temporal change in the stable isotope (SI) composition of jellyfish in the Kiel Fjord, Western Baltic Sea, was documented by analyzing δ13C, δ15N and δ34S 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 δ13C, a decrease of ~4 ‰ in δ15N and sharp decline of ~7 ‰ in δ34S. 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 δ34S, 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 δ34S 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.	en
dc.description.sponsorship	Deutsche Forschungsgemeinschaft (DFG, JA2008/1-1); European Commission and the Bundesministerium für Bildung und Forschung (Cluster of Excellence “The Future Ocean” and the BONUS project BIO-C3Grant No. 03F0682A)	en
dc.description.status	Peer reviewed	en
dc.description.version	Published Version	en
dc.format.mimetype	application/pdf	en
dc.identifier.articleid	112	en
dc.identifier.citation	Javidpour, J., Cipriano-Maack, A. N., Mittermayr, A. and Dierking, J. (2016) ‘Temporal dietary shift in jellyfish revealed by stable isotope analysis’, Marine Biology, 163, 112 (9pp). doi: 10.1007/s00227-016-2892-0	en
dc.identifier.doi	10.1007/s00227-016-2892-0	en
dc.identifier.eissn	1432-1793
dc.identifier.endpage	9	en
dc.identifier.issn	0025-3162
dc.identifier.journaltitle	Marine Biology	en
dc.identifier.startpage	1	en
dc.identifier.uri	https://hdl.handle.net/10468/8863
dc.identifier.volume	163	en
dc.language.iso	en	en
dc.publisher	Springer Nature Switzerland AG	en
dc.rights	© 2016, the Authors. Open Access. This 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.	en
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	en
dc.subject	Stable isotope	en
dc.subject	Generalized additive model	en
dc.subject	Trophic ecology	en
dc.subject	Potential food source	en
dc.subject	Trophic enrichment factor	en
dc.title	Temporal dietary shift in jellyfish revealed by stable isotope analysis	en
dc.type	Article (peer-reviewed)	en