Seasonal variations in fish community structure in the Laizhou Bay and Yellow River Estuary

Pengfei, 孙鹏飞 Sun; Xiujuan, 单秀娟 Shan; Wu, Qiang; Yunlong, 陈云龙 Chen; Xianshi, 金显仕 Jin

doi:10.5846/stxb201303060354

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Fish abundance and biomass were highest in autumn and lowest in spring and the composition of species varied significantly in different seasons. The same distribution of fish occurred in the Yellow River Estuary, which is also a temperate estuary [17]. Tropical and subtropical estuaries have higher species richness than temperate systems [18].…”

Section: Seasonal and Spatial Variations In Fish Assemblagesmentioning

confidence: 66%

Seasonal and Spatial Variations in Fish Assemblage in the Yangtze Estuary and Adjacent Waters and Their Relationship with Environmental Factors

Chen

Ren

Liu

et al. 2022

JMSE

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In this work, we identified the seasonal and spatial variations in fish assemblages and their relation to environmental variables in the Yangtze Estuary and adjacent waters. A total of 61 fish species in 32 families were identified over four seasons; of these, 12 species were dominant and Harpadon nehereus was the most dominant species. Fish varied in abundance, biomass, and species composition in different seasons; both biomass and abundance were highest in autumn and lowest in spring. Fish can be spatially divided into high-salinity assemblages and low-salinity assemblages. The spatial variation in fish assemblages was caused by the selectivity and adaptability of species for the environmental conditions of the estuary and the seasonal variation in fish assemblage structure likely resulted from migrations of dominant taxa associated with fish spawning and foraging behavior as well as the environment. The results of CCA analysis showed that temperature, depth, salinity, dissolved oxygen, and chlorophyll were the major factors affecting the fish assemblage differences throughout the seasons. Of these, temperature drove the seasonal variation in assemblage structure, while salinity significantly affected the spatial distribution of assemblages. This paper revealed the relationship between the seasonal and spatial distribution patterns of the fish assemblage and environmental factors and the results could provide a scientific basis for the management and sustainable utilization of fishery resources in the Yangtze Estuary and adjacent waters.

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Section: Seasonal and Spatial Variations In Fish Assemblagesmentioning

confidence: 66%

Seasonal and Spatial Variations in Fish Assemblage in the Yangtze Estuary and Adjacent Waters and Their Relationship with Environmental Factors

Chen

Ren

Liu

et al. 2022

JMSE

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show abstract

“…On the northern shore, the number of nodes(S), effective links(L) and links per unit of species abundance (D) were higher than that in non-flood season (Table 3, Figure 9). Affected by diluted water spreading and artificial freshwater fish enhancement and releasing, nekton communities had tendency of accumulations in estuary, increasing the diversity of fish species (Sun et al, 2014). At the same time, the number of energy pathways among species increased, and the contribution of various food sources tended to be homogenized, which made the structure of food web more complex.…”

Section: Response Of Food Web Energy Flow Structure To Environmental ...mentioning

confidence: 99%

Runoff from upstream changes the structure and energy flow of food web in estuary

Zhao

Liu

et al. 2023

Front. Mar. Sci.

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IntroductionSediment and nutrients flow into estuary with runoff, and then influence the estuary ecosystem. Much work has been done for investigating the response of water quality and species group (eg. phytoplankton or zooplankton) to the runoff from upstream, while few research has been taken to evaluate the response of the whole ecosystem.MethodsFood webs of different seasons and regions were established based on stable isotope analysis and Bayesian mixing model. The influences of upstream runoff and sediment transport on the estuarine food webs were analyzed.ResultsFood web in estuary had highly spatial-temporal variability. The stable isotope values of organisms were higher on the northern shore than that on the southern shore. The area with high-turbidity freshwater inflow nurtured more terrestrial- organic- matter (TOM) relying species. And the contribution of TOM to food web was higher in flood season than that in non-flood season. The trophic levels of major consumers in the non-flood season were generally higher than that in the flood season. Significant differences in the average TP of species between two shores appeared during the non-flood season (P < 0.05). Expect for the C value, all of the topological indexes of food webs on the northern shore were higher than those on the southern shore, and they were higher in the flood period.DiscussionThe input and diffusion of sediment and nutrients carried by runoff led to the changes in the dietary structure of estuarine organisms and the decrease in trophic levels of major consumers. At the same time, flow pulse with high sediment also aggravated the spatial differences of the structure of food webs. The higher contribution of TOM to consumers increased the link density of food web on the southern shore, making it a more robust system. However, the high diversity of food sources and aquatic species made the food web more complex on the northern shore.

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Seasonal variations in fish community structure in the Laizhou Bay and Yellow River Estuary

Cited by 2 publications

References 2 publications

Seasonal and Spatial Variations in Fish Assemblage in the Yangtze Estuary and Adjacent Waters and Their Relationship with Environmental Factors

Seasonal and Spatial Variations in Fish Assemblage in the Yangtze Estuary and Adjacent Waters and Their Relationship with Environmental Factors

Runoff from upstream changes the structure and energy flow of food web in estuary

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