Feeding of dominant zooplankton in Prydz Bay, Antarctica, during austral spring/summer: food availability and species responses
Feeding of dominant zooplankton in Prydz Bay, Antarctica, during austral spring/summer: food availability and species responses
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南极洲普里兹湾主要浮游动物的摄食，在南方春/夏季：食物供应和物种反应
DOI：
10.1007/s00300-013-1387-4
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发表时间：
2013-08
期刊：
影响因子：
1.7
通讯作者：
He, Qing
中科院分区：
文献类型：
--
作者：
Li, Chaolun;Sun, Song;Zhang, Cuixia;He, Qing
关于浮游动物物种的食物和捕食的信息对于增进对南大洋浮游动物群落动态的了解至关重要。通过孵化实验研究了南极普里兹湾浅海、坡地和海洋区的优势浮游动物物种在2009/2010年春夏季节的摄食情况，以确定优势桡足类和磷虾对不同摄食环境的反应。结果表明，在摄食和过滤主要的桡足类和磷虾方面存在明显的空间和时间差异。在春末，尖吻金龟活动不活跃，摄食率仅为1.30gC/μ/d。初夏，IS21站正在进行硅藻水华，显示出海藻生物量的最高值。和Fragilariaspp。日摄食率较高的有结晶柔鱼、尖吻真甲藻、革氏次殖吸虫和黄毛虫。相比之下，在微型浮游生物生物量较低的斜坡和海洋地区，桡足类主要吃纤毛虫(<；20μGC/L)。夏末，浅海海域的微型浮游生物主要由纳米级的伪硝藻组成。纤毛虫，GC/L.C.小于10μ，在浅海地区孵化，主要捕食纤毛虫。浮游植物总生物量较低(~lt；5μ，GC/L)，以假小球藻为主。在Fram Bank以北的坡地，孵化的桡足类的日摄食率低于2.5gC/μ。我们的结果清楚地表明，桡足类和磷虾有灵活的摄食策略，以应对普里兹湾在时间和空间上变化的食物供应。与此同时，纤毛虫似乎是浮游动物的重要碳源，特别是在食物浓度较低的地区。
Information on the food and predation of zooplankton species is essential for an improved understanding of zooplankton community dynamics of the Southern Ocean. Feeding of dominant zooplankton species at locations across the neritic, slope and oceanic regions of Prydz Bay, Antarctica, was investigated with incubation experiments during austral spring/summer of 2009/2010 to identify the response of dominant copepods and krill to different feeding environments. Results showed distinct spatial and temporal variations in ingestion and filtration of predominant copepods and krill. In late spring,Calanoides acutuswas inactive and the ingestion rate was only 1.30 μgC/ind/day. During early summer, a diatom bloom was in progress at station IS21, showing a peak biomass ofThalassiosiraspp. andFragilariaspp. Daily ingestion rates ofEuphausia crystallorophias,C. acutus,Metridia gerlacheiandCtenocalanus citerwere relatively high. By contrast, copepod ate predominantly ciliates in slope and oceanic regions where microplankton biomass were lower (<20 μgC/L). During late summer, microplankton of neritic regions, mainly composed of nano-sizedPseudo-nitzschiaspp. and ciliates, was less than 10 μgC/L.C. acutusincubated in neritic regions mainly ate ciliates. The total microplankton biomass was lower (<5 μgC/L) and predominated byPseudo-nitzschiaspp. in slope regions north of Fram Bank, and daily ingestion rates of incubated copepods were less than 2.5 μgC/ind. Our results clearly demonstrated that copepods and krill had flexible feeding strategies to cope with temporally and spatially changing food availability in Prydz Bay. Meanwhile, ciliates appeared to represent an important carbon source for zooplankton, especially in regions with lower food concentrations.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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DOI：
10.1016/j.dsr2.2004.08.004
发表时间：
2004-08
影响因子：
3
作者：
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通讯作者：
Se-Jong Ju;H. Harvey