Preliminary study on the food web and potential carbon sources of main consumers in Zhongjieshan Islands sea area in Zhoushan, Zhejiang

Yang Fan; Yin Rui; Fan Jiangtao; Jiang Rijin; Xiao Yi; Wang Jing; Xu Hanxiang; Liu Mingzhi

doi:10.12284/hyxb2023056

Volume 45 Issue 1

Jan. 2023

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Yang Fan，Yin Rui，Fan Jiangtao, et al. Preliminary study on the food web and potential carbon sources of main consumers in Zhongjieshan Islands sea area in Zhoushan, Zhejiang[J]. Haiyang Xuebao，2023, 45(1)：25–37 doi: 10.12284/hyxb2023056

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Preliminary study on the food web and potential carbon sources of main consumers in Zhongjieshan Islands sea area in Zhoushan, Zhejiang

doi: 10.12284/hyxb2023056

Yang Fan^{1, 2
,},
Yin Rui²,
Fan Jiangtao³,
Jiang Rijin^{2
,
,},
Xiao Yi^{1, 2},
Wang Jing^{1, 2},
Xu Hanxiang^{1, 2},
Liu Mingzhi^{1, 2}

1.
Marine and Fishery Institute, Zhejiang Ocean University, Zhoushan 316021, China
2.
Key Laboratory of Sustainable Utilization of Technology Research for Fisheries Resources of Zhejiang Province, Scientific Observation and Experimental Station of Fishery Resources of Key Fishing Grounds, Ministry of Agriculture and Rural Affairs, Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, China
3.
South China Sea Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China

Received Date: 2022-09-09
Rev Recd Date: 2022-11-03

Available Online: 2022-11-08

Publish Date: 2023-01-09

Abstract

Abstract

In order to understand the characteristics of food web structure in Zhongjieshan Islands, consumer samples of fish, shrimp and crabs, cephalopods, shellfish and zooplankton were collected from Zhongjieshan Islands in July 2020. Based on the carbon and nitrogen stable isotope techniques, the contributions of the four potential carbon sources (macroalgae, phytoplankton, suspended particulate organic matter (POM) and substrate organic matter (SOM)) to consumers, as well as the food web structure and nutritional relationship of the Zhongjieshan Islands were analyzed. The results revealed that the δ¹³C values of carbon sources ranged from −22.93‰ to −9.73‰, and the δ¹⁵N values ranged from 1.72‰ to 7.68‰. The δ¹³C values of consumers ranged from −21.95‰ to −12.55‰, and the δ¹⁵N values of consumers ranged from 4.13‰ to 12.92‰. One-way analysis of variance showed that there were significant differences in carbon and nitrogen stable isotopes among different carbon sources and different groups of consumers (p<0.01). SIBER model was used to analyze the trophic structure indexes of the regional ecosystem of Zhongjieshan Islands. Compared with the research results of other sea areas, it was found that the level of food source diversity (CR), trophic level length (NR) and total niche area (TA) were relatively high. SIAR model was used to calculate the carbon source contribution rate. The results showed that phytoplankton and POM were important carbon sources, with an average contribution rate of 29.63% and 28.72%. The maximum contribution rate of phytoplankton to zooplankton was 80.58%, and the maximum contribution rate of POM to fish was 79.74%; the maximum contribution rate of SOM to shrimp and crab was 49.94%; the carbon source contribution of macroalgae to consumers was the lowest, with an average of 18.37%. The mean trophic level range of the main consumers in Zhongjieshan Islands was 1.58 to 3.63, and the trophic level was 3. The average trophic level from big to small was as follows of cephalopods (3.09), fish (3.00), shrimps and crabs (2.70), shellfish (1.82). The consumers in the waters of Zhongjieshan Islands were mainly low and intermediate carnivores, and there were few omnivores and high carnivores. This study initially constructed the ecosystem food web of Zhongjieshan Islands, which provided reference data for understanding the trophic structure in this area, and also provided theoretical information for further study of the ecosystem.
- Zhongjieshan Islands,
- food web,
- potential carbon sources,
- trophic level

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References(45)

References

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