Trophic diversity of the bloom-forming jellyfish community in the coastal waters of China assessed by stable isotope analysis.

IF 5.3 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Marine pollution bulletin Pub Date : 2025-01-01 Epub Date: 2024-11-27 DOI:10.1016/j.marpolbul.2024.117330
Pengpeng Wang, Fang Zhang, Dongjie Guo, Xupeng Chi, Song Feng, Song Sun
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引用次数: 0

Abstract

A growing realization indicates that the trophic ecology of jellyfish is more diverse than once thought, yet a holistic view reflecting the trophic structure and trophodynamics in bloom-forming jellyfish community remains rare. Based on stable isotope δ13C and δ15N analysis, we estimated the trophic characteristics of common blooms jellyfish Nemopilema nomurai, Cyanea spp., Aurelia coerulea and Aequorea spp. in the coastal waters of China (CWC). Our data indicated that most of the isotopic niche space in the overall planktonic food web was occupied by the bloom-forming jellyfish community. The large spectrum of isotopic niche highlights the diverse ecological roles and potentially broad trophic relevance of these jellyfish in the food web. The substantial trophic diversity of these jellyfish resulted from the various trophic positions occupied by different taxa, complicated niche differentiation and overlap patterns, inconsistent size-based trophic variation, and spatial and temporal variation patterns. Isotopic niche comparisons indicated the presence of niche differentiation, reflecting the difference and individual-specific characteristic in resource exploitation and feeding preference among different jellyfish. Additionally, the inconsistent size-based trophic variation among groups derived from an increase in trophic level with size for Cyanea spp., A. coerulea and Aequorea spp. medusae to no change for N. nomurai medusae, which suggests the complexity in size-related trophic shift patterns within the jellyfish group. Additional diversity also arose from variation in the spatiotemporal structuring of jellyfish trophic ecology, which might be caused by the occurrence of trophic heterogeneity at the base of the planktonic food web. In conclusion, our study characterized the trophic structures of the bloom-forming jellyfish community in the CWC, and revealed their trophic diversity resulting from interspecific, intraspecific (ontogenetic), and spatiotemporal variation. These results hold strong potential to further improve the understanding of the trophic ecology and functional roles of the jellyfish community. Furthermore, this study provides a systematic and valuable isotopic data set, spanning from the food web baseline to zooplanktonic organisms and jellyfish community, against which compare with trophic investigations in future in planktonic food web of the CWC.

利用稳定同位素分析评估中国沿海水域水华形成水母群落的营养多样性。
越来越多的研究表明,水母的营养生态比以往认为的更加多样化,然而反映水华形成水母群落营养结构和营养动力学的整体观点仍然罕见。基于稳定同位素δ13C和δ15N分析,我们估计了中国近岸海域常见水华水母Nemopilema nomurai、Cyanea spp.、Aurelia coerulea和Aequorea spp.的营养特征。我们的数据表明,在整个浮游食物网中,大部分同位素生态位空间都被藻华形成水母群落所占据。大量的同位素生态位突显了这些水母在食物网中的不同生态作用和潜在的广泛营养相关性。不同类群占据不同的营养位置、复杂的生态位分化和重叠模式、大小不一致的营养变异以及时空变异模式导致了这些水母的营养多样性。同位素生态位比较表明存在生态位分化,反映了不同水母在资源利用和摄食偏好方面的差异和个体特异性。此外,各组间基于体型的营养级变化不一致,从鲤形目、A. coerulea和Aequorea spp. Medusae的营养级随体型增加而增加,到N. nomurai Medusae的营养级没有变化,这表明水母组内与体型相关的营养级转移模式很复杂。水母营养生态时空结构的变化也产生了额外的多样性,这可能是浮游食物网底部出现营养异质性造成的。总之,我们的研究描述了 CWC 水华形成水母群落的营养结构,并揭示了种间、种内(本体)和时空变异导致的营养多样性。这些结果极有可能进一步提高人们对水母群落营养生态学和功能作用的认识。此外,这项研究还提供了一个从食物网基线到浮游生物和水母群落的系统而有价值的同位素数据集,可与今后对中国西部水域浮游食物网的营养调查进行比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Marine pollution bulletin
Marine pollution bulletin 环境科学-海洋与淡水生物学
CiteScore
10.20
自引率
15.50%
发文量
1077
审稿时长
68 days
期刊介绍: Marine Pollution Bulletin is concerned with the rational use of maritime and marine resources in estuaries, the seas and oceans, as well as with documenting marine pollution and introducing new forms of measurement and analysis. A wide range of topics are discussed as news, comment, reviews and research reports, not only on effluent disposal and pollution control, but also on the management, economic aspects and protection of the marine environment in general.
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