Seasonal variation in the trophic structure of food webs in coastal waters of Jiangsu Province based on stable isotope techniques

Lu Ya’nan; Zhang Rui; Zhang Hu; Zhang Shuo; Gao Shike

doi:10.12284/hyxb2022040

Volume 44 Issue 2

Feb. 2022

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Lu Ya’nan，Zhang Rui，Zhang Hu, et al. Seasonal variation in the trophic structure of food webs in coastal waters of Jiangsu Province based on stable isotope techniques[J]. Haiyang Xuebao，2022, 44(2)：1–10 doi: 10.12284/hyxb2022040

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Seasonal variation in the trophic structure of food webs in coastal waters of Jiangsu Province based on stable isotope techniques

doi: 10.12284/hyxb2022040

Lu Ya’nan^1
,,
Zhang Rui¹,
Zhang Hu²,
Zhang Shuo^{1, 3
,
,},
Gao Shike^{1
,
,}

1.
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
2.
Jiangsu Marine Fisheries Research Institute, Nantong 226007, China
3.
Joint Laboratory for Monitoring and Conservation of Aquatic Living Resources in the Yangtze Estuary, Shanghai 200922, China

Received Date: 2021-07-14
Rev Recd Date: 2021-10-24
Publish Date: 2022-02-28

Abstract

Abstract

In this study, we used stable isotope technology to analyze different species (fish, crustaceans, cephalopods, benthos, etc.) collected in spring, summer and autumn in the coastal waters of Jiangsu Province. We used SIBER model to calculate the trophic niche of consumers, and calculated the quantitative indicators of six metrics in different seasons. The results showed that there were no significant differences in δ¹³C and nitrogen δ¹⁵N values among three seasons (p>0.05). In spring, the δ¹³C values ranged from −24.47‰ to −14.50‰, the δ¹⁵N values ranged from 6.86‰ to (14.98±0.49)‰, and the trophic level ranged from 1.52 to 4.28±0.17. In summer, the δ¹³C values ranged from −19.86‰ to −14.44‰, the δ¹⁵N values ranged from 5.79‰ to (12.54±3.50)‰, and the trophic level ranged from 1.25 to 3.52. In autumn, the δ¹³C values ranged from (−22.17±4.90)‰ to (−14.21±0.36)‰, the δ¹⁵N values ranged from 6.30‰ to (14.60±0.51)‰, and the trophic level ranged from 1.34 to 4.15±0.14. The structure of food web was stable in each season, and the trophic niche of some species overlaps in different degrees. In addition, the food sources are more extensive, and the trophic level and community diversity are higher in spring, the food sources of consumers are more abundant, but the degree of trophic niche differentiation is lower in summer, while in autumn, the structure of food web is relatively simple, but the distribution of trophic niche is wider.
- stable isotopes,
- coastal waters of Jiangsu Province,
- trophic structure,
- trophic niche,
- seasonal variation

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References(35)

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