Ecosystem structure in the Haizhou Bay and adjacent waters based on Ecopath model

Ren Xiaoming; Liu Yang; Xu Binduo; Zhang Chongliang; Ren Yiping; Cheng Yuan; Xue Ying

doi:10.3969/j.issn.0253-4193.2020.06.012

Volume 42 Issue 6

Nov. 2020

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Ren Xiaoming，Liu Yang，Xu Binduo, et al. Ecosystem structure in the Haizhou Bay and adjacent waters based on Ecopath model[J]. Haiyang Xuebao，2020, 42(6)：101–109 doi: 10.3969/j.issn.0253-4193.2020.06.012

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Ecosystem structure in the Haizhou Bay and adjacent waters based on Ecopath model

doi: 10.3969/j.issn.0253-4193.2020.06.012

1.
Fisheries College, Ocean University of China, Qingdao 266003, China
2.
Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine science and Technology (Qingdao), Qingdao 266237, China
3.
School of Information, Qingdao Technical College, Qingdao 266555, China
4.
Offshore (Dalian) Ecological Development Co. Ltd., Dalian 116023, China

Received Date: 2019-07-17
Rev Recd Date: 2019-10-10

Available Online: 2020-11-18

Publish Date: 2020-06-25

Abstract

Abstract

Based on the data obtained from bottom trawl investigation in the Haizhou Bay and adjacent waters in 2018, a mass-balance model for the Haizhou Bay ecosystem was constructed by Ecopath with Ecosim software, consisting of 26 functional groups. Using Ecopath model, we evaluated the trophic structure, trophic impact relationship and ecosystem characters of the Haizhou Bay to provide a theoretical basis for the implementation of ecosystem-based fisheries management. The result showed that in this ecosystem trophic levels of functional groups varied from 1.00 to 4.19, and the range of fish trophic level was wide, ranging from 3.22 to 4.19. Phytoplankton and molluscs were in important nutritional positions in the ecosystem facing with the pressure from both the primary producers and predators. The evaluation of the ecosystem structure and function showed that the total primary production/total respiration (TPP/TR) was 7.096, total primary production /total biomass (TPP/B) was 56.866, the connectance index (CI) and system omnivory index (SOI) were 0.429 and 0.204, indicating that the Haizhou Bay ecosystem was in an immature, unstable state and was susceptible to external disturbances. Through the study of the Haizhou Bay and its adjacent waters ecosystem model, we analyzed the nutrient structure and phylogenetic status of the sea area, which would provide a theoretical basis for the sustainable utilization and scientific management of fishery resources in the Haizhou Bay.
- Haizhou Bay,
- Ecopath model,
- trophic structure,
- ecosystem character,
- functional group

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