Seasonal hydromedusan feeding patterns in an Eastern Boundary Current show consistent predation on primary consumers
Seasonal hydromedusan feeding patterns in an Eastern Boundary Current show consistent predation on primary consumers
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东部边界洋流的季节性水生水母进食模式显示出对主要消费者的持续捕食
DOI:
10.1093/plankt/fbab059
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发表时间:
2021
影响因子:
2.1
通讯作者:
Sutherland, Kelly R
中科院分区:
文献类型:
--
作者:
Corrales-Ugalde, Marco;Sponaugle, Su;Cowen, Robert K;Sutherland, Kelly R
Cnidarian jellyfish can be dominant players in the food webs of highly productive Eastern Boundary Currents (EBC). However, the trophic role of inconspicuous hydromedusae in EBCs has traditionally been overlooked. We collected mesozooplankton from five stations along two cross-shelf transects in the Northern California Current (NCC) during winter and summer of 2018–2019. We analyzed gut contents of 11 hydromedusan species and the prey community to (i) determine prey resource use by hydromedusae and (ii) determine temporal shifts in the trophic niche of hydromedusae, focusing on the two most collected species (Clytia gregariaandEutonina indicans). Hydromedusae in the NCC fed mostly on copepods, appendicularians and invertebrate larvae. Nonmetric multidimensional scaling of hydromedusan diets showed seasonal shifts in prey resource driven by the abundantC. gregaria, which fed mostly on copepod eggs during winter and fed mostly on appendicularians and copepods during summer. Prey selectivity for copepod eggs increased during winter forC. gregariaandE. indicans. Intriguingly, theoretical ingestion rates show that both species acquire similar amounts of carbon during upwelling and nonupwelling conditions. Hydromedusae’s consistent presence and predation impact across seasons may lead to significant effects in carbon and energy transfer through the NCC food web.
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影响因子:
3
作者:
L. Postel;H. Fock;W. Hagen
通讯作者:
W. Hagen
DOI:
--
发表时间:
1979
期刊:
影响因子:
--
作者:
W. Peterson;Charles B. Miller;A. Hutchinson
通讯作者:
A. Hutchinson
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
M. Canino;G. C. Grant
通讯作者:
G. C. Grant
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
S. Pearre
通讯作者:
S. Pearre
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
K. Fukami;U. Simidu;N. Taga
通讯作者:
N. Taga