Prey size spectra and predator to prey size ratios of southern ocean salps
Prey size spectra and predator to prey size ratios of southern ocean salps
复制标题
南大洋樽海鞘的猎物尺寸谱和捕食者与猎物的尺寸比率
DOI:
10.1007/s00227-023-04187-3
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发表时间:
2023
期刊:
影响因子:
2.4
通讯作者:
Stukel, Michael R.
中科院分区:
文献类型:
--
作者:
Fender, Christian K.;Décima, Moira;Gutiérrez-Rodríguez, Andres;Selph, Karen E.;Yingling, Natalia;Stukel, Michael R.
Salp grazing is important in shaping planktonic food-web structure. However, little is known about the size ranges of their prey in the field or how grazing impacts size structure. This study investigated the feeding habits of seven different species of salps, representing a variety of sizes and life stages across subtropical and subantarctic waters east of New Zealand. Scanning electron microscopy was used to examine the gut contents of 58 salps, which were then compared to water column plankton communities characterized via epifluorescence microscopy, FlowCam, and flow cytometry. While most of the gut contents resembled ambient waters, substantial differences were found amongst some co-occurring species, such as increased retention of submicron bacteria amongst smaller salps likeThalia democratica. We found that even for those salps capable of feeding on bacteria efficiently, nanoplankton and small microplankton still made up the majority of gut biomass. Larger microplankton were rarer in the guts than in the water column, potentially suggesting an upper size-threshold in addition to the lower size-threshold that has been the focus of most previous work. Salp carbon-weighted predator to prey size ratios were variable, with the majority falling between 1000:1 and 10,000:1 depending largely on the size of the salp. Taken together our results indicate that despite being able to feed on submicron particles, picoplankton make up at most 26.4% (mean = 6.4%) of salp gut carbon and are relatively unimportant to the energetics of most salps in this region compared to nanoplankton such as small dinoflagellates and diatoms.
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影响因子:
4.5
作者:
Stukel, Michael R.;Décima, Moira;Selph, Karen E.;Gutiérrez‐Rodríguez, Andres
通讯作者:
Gutiérrez‐Rodríguez, Andres
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
P. Horn;T. Burrell;A. Connell;M. Dunn
通讯作者:
M. Dunn
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
M. M. Mullin
通讯作者:
M. M. Mullin
影响因子:
1.6
作者:
Katja Metfies;Anja Nicolaus;L. Von Harbou;U. Bathmann;I. Peeken
通讯作者:
I. Peeken
影响因子:
1.2
作者:
Q. Bone;C. Carré;K. Ryan
通讯作者:
K. Ryan