Benthic food web structure of Xiaoqing River Estuary adjacent sea area revealed by carbon and nitrogen stable isotope analysis

Zhang Chuanxin; Chen Jing; Ji Yinglu; Chen Linlin; Li Haihui; Wang Quanchao; Li Baoquan; Xing Ronglian

doi:10.12284/hyxb2022016

Volume 44 Issue 1

Jan. 2022

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Zhang Chuanxin，Chen Jing，Ji Yinglu, et al. Benthic food web structure of Xiaoqing River Estuary adjacent sea area revealed by carbon and nitrogen stable isotope analysis[J]. Haiyang Xuebao，2022, 44(1)：89–100 doi: 10.12284/hyxb2022016

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Benthic food web structure of Xiaoqing River Estuary adjacent sea area revealed by carbon and nitrogen stable isotope analysis

doi: 10.12284/hyxb2022016

1.
College of Life Sciences, Yantai University, Yantai 264005, China
2.
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
3.
North China Sea Marine Forecasting Center, State Oceanic Administration, Qingdao 266061, China
4.
Shouguang Marine Fishery Development Center, Shouguang 262700, China

Received Date: 2021-07-07
Rev Recd Date: 2021-09-04

Available Online: 2021-09-27

Publish Date: 2022-01-14

Abstract

Abstract

To examine the benthos food web structure in the Xiaoqing River Estuary adjacent sea area, four potential food sources, including sediment organic matter (SOM), suspended particulate organic matter (POM), zooplankton and phytoplankton, and 35 aquatic organisms are collected in October 2020. Carbon and nitrogen stable isotope technique and Bayesian mixing model (MixSIAR) are used to analyze the food web structure and the trophic relationship of benthos. The results show that the δ¹³C and δ¹⁵N values of potential food sources varies from −25.56‰ to −17.91‰ and 2.43‰ to 10.33‰, respectively. Moreover, the δ¹³C and δ¹⁵N values of benthos varies from −23.48‰ to −18.31‰ and 8.79‰ to 18.01‰, respectively. The trophic levels of the main consumers rang from 1.65 (Arcuatula senhousia) to 3.54 (Ctenotrypauchen chinensis). Trophic relationship analysis showes that there are two main energy transfer pathways in the Xiaoqing River Estuary adjacent sea area. One is the planktonic food chain with plankton as the major energy source, in which bivalves (except Solen brevissimus), small shrimps, and polychaetes are the main primary consumers. The other is the benthic food chain with SOM as the major energy source, in which Solen brevissimus and gastropods are the main primary consumers. On the whole, there is a certain degree of niche overlap and fierce competition among species in the Xiaoqing River Estuary adjacent sea area.
- Xiaoqing River Estuary adjacent sea area,
- food web structure,
- trophic level,
- stable isotope,
- food source,
- nutritional niche

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