Temporal dietary shift in jellyfish revealed by stable isotope analysis
Temporal dietary shift in jellyfish revealed by stable isotope analysis
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稳定同位素分析揭示水母饮食的暂时转变
DOI:
10.1007/s00227-016-2892-0
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发表时间:
2016
期刊:
影响因子:
2.4
通讯作者:
Jan Dierking
中科院分区:
文献类型:
--
作者:
Jamileh Javidpour;Ashlie N Cipriano;A Mittermayr;Jan Dierking
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 ofAurelia auritaandCyanea capillatain the period between June and October 2011. A strong and significant temporal change in all SI values ofA. auritawas 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 inA. auritafrom 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 ofC. 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 ofA. auritain the diet ofC. capillatathan 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.
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DOI:
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发表时间:
2008
期刊:
影响因子:
--
作者:
S. Jennings;T. A. Maxwell;M. Schratzberger;S. Milligan
通讯作者:
S. Milligan
DOI:
--
发表时间:
2008
期刊:
影响因子:
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作者:
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D. Thibault
DOI:
--
发表时间:
1994
期刊:
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作者:
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影响因子:
2.5
作者:
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Agnes Mittermayr;T. F. Hansen;U. Sommer
影响因子:
2.4
作者:
FitzGeorge-Balfour T
通讯作者:
FitzGeorge-Balfour T