Volume 17 Issue 5
Sep.  2021
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Huijuan WANG, Wenbo ZHANG, Honghui HUANG, Shannan XU, Huaxue LIU. Trophic structure of fishery organism assemblage in Daya Bay based on carbon and nitrogen stable isotope analysis[J]. South China Fisheries Science, 2021, 17(5): 101-109. DOI: 10.12131/20210005
Citation: Huijuan WANG, Wenbo ZHANG, Honghui HUANG, Shannan XU, Huaxue LIU. Trophic structure of fishery organism assemblage in Daya Bay based on carbon and nitrogen stable isotope analysis[J]. South China Fisheries Science, 2021, 17(5): 101-109. DOI: 10.12131/20210005
shu

Trophic structure of fishery organism assemblage in Daya Bay based on carbon and nitrogen stable isotope analysis

  • 1.

    South China Institute of Environmental Science, Ministry of Ecology and Environment, Guangzhou 510530, China

  • 2.

    Guangdong Provincial Academy of Environmental Science, Guangzhou 510045, China

  • 3.

    South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, Guangzhou 510300, China

More Information
  • Received Date: January 04, 2021
  • Revised Date: March 23, 2021
  • Accepted Date: April 25, 2021
  • Available Online: May 07, 2021
    Graphical Abstract
    • Abstract
  • According to the biological survey of bottom trawl fishery conducted in Daya Bay in the summer of 2017 and the winter of 2018, we analyzed the basic characteristics of the stable isotope of carbon and nitrogen (δ13C and δ15N) in fishery organisms by using δ13C and δ15N techniques. In addition, we constructed a continuous trophic level spectrum, and discussed the differences in the nutritional structure of fishery organisms in different seasons. The results show that the range of (δ13C and δ15N) of main fishery species in Daya Bay were −19.66‰−15.19‰ [Average: (−17.26±0.86)‰] and 11.63‰−16.01‰ [Average: (13.59±0.96)‰], respectively. We used the average δ15N of small zooplankton as a reference to construct the trophic level spectrum of fishery organisms, and found that the trophic level of fishery organisms in Daya Bay ranged from 2.99 to 4.28. The trophic level of fish had the widest span and a more complex diet. We calculated seven quantitative community indices of trophic structure of macrobenthos by using the SIBER model, and found that some organisms shared the preys, and there was a phenomenon of niche overlap. In addition, the community nutrition redundancy in summer was lower than that in winter.
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    • References (36)
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