Unveiling vertical migration patterns of the mesopelagic fish Ceratoscopelus warmingii in cold seep ecosystems: A trophic niche perspective
文献类型： 外文期刊
作者： Xie, Hongyu 1 ; Cai, Yancong 1 ; Li, Chunhou 1 ; Sun, Jinhui 3 ; Kong, Xiaolan 1 ; Wang, Teng 1 ; Xiao, Yayuan 1 ; Jiang, Yane 1 ; Song, Xiaoyu 1 ; Liu, Yong 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploita, Observat & Res Field Stn Pearl River Estuary Ecosy, Guangzhou 510300, Peoples R China
2.Sanya Trop Fisheries Res Inst, Key Lab Efficient Utilizat & Proc Marine Fishery R, Sci Observat & Res Stn Xisha Isl Reef Fishery Ecos, Sanya 572018, Peoples R China
3.Tian Jin Agr Univ, Coll Fisheries, Tianjin, Peoples R China
关键词： Ceratoscopelus warmingii; Trophic niche; Stable isotopes; Vertical migration; Cold Seep ecosystem
期刊名称：ECOLOGICAL INDICATORS （ 影响因子：7.4； 五年影响因子：7.2 ）
ISSN： 1470-160X
年卷期： 2024 年 166 卷
页码：
收录情况： SCI
摘要： Ceratoscopelus warmingii, a common mesopelagic fish in cold seep ecosystems, plays a crucial role in transferring energy and materials between different water layers, thereby influencing deep-sea carbon cycling and storage. In August 2023, we collected samples from four depths (75 m, 400 m, 500 m, and 600 m) in cold seep waters to analyze the trophic niche characteristics of C. warmingii using stable isotope techniques. The results indicated significant differences in S13C 13 C and S15N 15 N values among the water layers, with mean S13C 13 C and S15N 15 N values of-19.85 %o+0.33 %o and 8.41 %o+0.62 %o, respectively. Indicators of trophic structure showed distinct vertical differentiation, with the width of the trophic niche decreasing as depth increased. At 75 m and 400 m, the consistency of CR and NR indicators and high trophic niche overlap indicated similar food sources, confirming vertical migration behavior. In contrast, at 500 m, the MNND and SDNND values suggested a more stable trophic structure, while at 600 m, changes in feeding sources pointed to a distinct population. The Standard Ellipse Area of Overlap (SEAc) was highest between 75 m and 400 m, while the divergence of trophic ecological niches at 600 m, with different food sources, suggests that cold seep ecosystems at this depth provide a relatively stable trophic structure for C. warmingii and support the formation of an independent population. In cold seep ecosystems, C. warmingii employs adaptive trophic strategies to optimize survival under varying habitat conditions at different depths. This vertical trophic differentiation reduces intraspecific competition and enhances population stability in deep-sea habitats. This study enhances our understanding of the trophic niche and vertical migration of C. warmingii in cold seep ecosystems, significantly contributing to our knowledge of biodiversity, energy flow, and material cycling in these unique environments.
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