| DOI: | 10.1111/gcb.14546
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| Scopus记录号: | 2-s2.0-85059695105
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| 论文题名: | Stratification, nitrogen fixation, and cyanobacterial bloom stage regulate the planktonic food web structure |
| 作者: | Loick-Wilde N.; Fernández-Urruzola I.; Eglite E.; Liskow I.; Nausch M.; Schulz-Bull D.; Wodarg D.; Wasmund N.; Mohrholz V.
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| 刊名: | Global Change Biology
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| ISSN: | 13541013
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| 出版年: | 2019
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| 卷: | 25, 期:3 | | 起始页码: | 794
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| 结束页码: | 810
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| 语种: | 英语
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| 英文关键词: | amino acids
; Baltic Sea
; bloom stage
; cyanobacteria
; food web structure
; mesozooplankton
; N 2 fixation
; stable nitrogen isotopes
; stratification
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| Scopus关键词: | Cyanobacteria
; Dinophyceae
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| 英文摘要: | Changes in the complexity of planktonic food webs may be expected in future aquatic systems due to increases in sea surface temperature and an enhanced stratification of the water column. Under these conditions, the growth of unpalatable, filamentous, N 2 -fixing cyanobacterial blooms, and their effect on planktonic food webs will become increasingly important. The planktonic food web structure in aquatic ecosystems at times of filamentous cyanobacterial blooms is currently unresolved, with discordant lines of evidence suggesting that herbivores dominate the mesozooplankton or that mesozooplankton organisms are mainly carnivorous. Here, we use a set of proxies derived from amino acid nitrogen stable isotopes from two mesozooplankton size fractions to identify changes in the nitrogen source and the planktonic food web structure across different microplankton communities. A transition from herbivory to carnivory in mesozooplankton between more eutrophic, near-coastal sites and more oligotrophic, offshore sites was accompanied by an increasing diversity of microplankton communities with aging filamentous cyanobacterial blooms. Our analyses of 124 biotic and abiotic variables using multivariate statistics confirmed salinity as a major driver for the biomass distribution of non-N 2 -fixing microplankton species such as dinoflagellates. However, we provide strong evidence that stratification, N 2 fixation, and the stage of the cyanobacterial blooms regulated much of the microplankton diversity and the mean trophic position and size of the metabolic nitrogen pool in mesozooplankton. Our empirical, macroscale data set consistently unifies contrasting results of the dominant feeding mode in mesozooplankton during blooms of unpalatable, filamentous, N 2 -fixing cyanobacteria by identifying the at times important role of heterotrophic microbial food webs. Thus, carnivory, rather than herbivory, dominates in mesozooplankton during aging and decaying cyanobacterial blooms with hitherto uncharacterized consequences for the biogeochemical functions of mesozooplankton. © 2019 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/117484
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Loick-Wilde N.,Fernández-Urruzola I.,Eglite E.,et al. Stratification, nitrogen fixation, and cyanobacterial bloom stage regulate the planktonic food web structure[J]. Global Change Biology,2019-01-01,25(3)
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