globalchange  > 全球变化的国际研究计划
DOI: 10.1002/ece3.5533
WOS记录号: WOS:000481365400001
论文题名:
Metabolism and foraging strategies of mid-latitude mesozooplankton during cyanobacterial blooms as revealed by fatty acids, amino acids, and their stable carbon isotopes
作者: Eglite, Elvita1; Graeve, Martin2; Dutz, Joerg1; Wodarg, Dirk3; Liskow, Iris1; Schulz-Bull, Detlef3; Loick-Wilde, Natalie1
通讯作者: Eglite, Elvita
刊名: ECOLOGY AND EVOLUTION
ISSN: 2045-7758
出版年: 2019
卷: 9, 期:17, 页码:9916-9934
语种: 英语
英文关键词: amino acids ; fatty acids ; food webs ; isoscapes ; stable carbon isotopes ; zooplankton
WOS关键词: RATIO MASS-SPECTROMETRY ; LIFE-CYCLE STRATEGIES ; COPEPOD TEMORA-LONGICORNIS ; BALTIC SEA ; CALANOID COPEPODS ; ORGANIC-MATTER ; CLIMATE-CHANGE ; BIOCHEMICAL-COMPOSITION ; TROPHIC RELATIONSHIPS ; REPRODUCTIVE SUCCESS
WOS学科分类: Ecology ; Evolutionary Biology
WOS研究方向: Environmental Sciences & Ecology ; Evolutionary Biology
英文摘要:

Increasing sea surface temperatures (SST) and blooms of lipid-poor, filamentous cyanobacteria can change mesozooplankton metabolism and foraging strategies in marine systems. Lipid shortage and imbalanced diet may challenge the build-up of energy pools of lipids and proteins, and access to essential fatty acids (FAs) and amino acids (AAs) by copepods. The impact of cyanobacterial blooms on individual energy pools was assessed for key species temperate Temora longicornis and boreal Pseudo-/Paracalanus spp. that dominated field mesozooplankton communities isolated by seasonal stratification in the central Baltic Sea during the hot and the cold summer. We looked at (a) total lipid and protein levels, (b) FA trophic markers and AA composition, and (c) compound-specific stable carbon isotopes (delta C-13) in bulk mesozooplankton and in a subset of parameters in particulate organic matter. Despite lipid-poor cyanobacterial blooms, the key species were largely able to cover both energy pools, yet a tendency of lipid reduction was observed in surface animals. Omni- and carnivory feeding modes, FA trophic makers, and delta C-13 patterns in essential compounds emphasized that cyanobacterial FAs and AAs have been incorporated into mesozooplankton mainly via feeding on mixo- and heterotrophic (dino-) flagellates and detrital complexes during summer. Foraging for essential highly unsaturated FAs from (dino-) flagellates may have caused night migration of Pseudo-/Paracalanus spp. from the deep subhalocline waters into the upper waters. Only in the hot summer (SST>19.0 degrees C) was T. longicornis submerged in the colder subthermocline water (similar to 4 degrees C). Thus, the continuous warming trend and simultaneous feeding can eventually lead to competition on the preferred diet by key copepod species below the thermocline in stratified systems. A comparison of delta C-13 patterns of essential AAs in surface mesozooplankton across sub-basins of low and high cyanobacterial biomasses revealed the potential of delta C-13-AA isoscapes for studies of commercial fish feeding trails across the Baltic Sea food webs.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/145549
Appears in Collections:全球变化的国际研究计划

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作者单位: 1.Leibniz Inst Balt Sea Res Warnemuende, Dept Biol Oceanog, Seestr 15, D-18119 Rostock, Germany
2.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Dept Marine Chem, Bremerhaven, Germany
3.Leibniz Inst Balt Sea Res Warnemuende, Dept Marine Chem, Rostock, Germany

Recommended Citation:
Eglite, Elvita,Graeve, Martin,Dutz, Joerg,et al. Metabolism and foraging strategies of mid-latitude mesozooplankton during cyanobacterial blooms as revealed by fatty acids, amino acids, and their stable carbon isotopes[J]. ECOLOGY AND EVOLUTION,2019-01-01,9(17):9916-9934
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