The influence law of tidal flat benthic microalgae on sediment components

Yi Zhou; Heyue Zhang; Menghan Kang; Yuxian Gu; Hongyam Yang; Mingjie Gong; Zeng Zhou; Yanan Zhang

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Yi Zhou，Heyue Zhang，Menghan Kang, et al. The influence law of tidal flat benthic microalgae on sediment components[J]. Haiyang Xuebao，2025, 47(x)：1–12

Citation:

Yi Zhou，Heyue Zhang，Menghan Kang, et al. The influence law of tidal flat benthic microalgae on sediment components[J]. Haiyang Xuebao，2025, 47(x)：1–12

Citation:

Yi Zhou，Heyue Zhang，Menghan Kang, et al. The influence law of tidal flat benthic microalgae on sediment components[J]. Haiyang Xuebao，2025, 47(x)：1–12

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The influence law of tidal flat benthic microalgae on sediment components

1.
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
2.
Center for East Asian-Australasian Flyway, Beijing Forestry University, Beijing 100091, China
3.
Key Laboratory of Land Satellite Remote Sensing Application, Ministry of Natural Resources of China, Nanjing 210019, China
4.
Yancheng Wetland and World Natural Heritage Conservation and Management Center, Yancheng 224133, China

Received Date: 2024-12-27
Rev Recd Date: 2025-03-11

Available Online: 2025-04-23

Abstract

Abstract

There are complex interactions between the sediment components of silty-muddy tidal flats and benthic microalgae, which affect the stability of the tidal flat ecosystem and geomorphological evolution. In order to explore the influence law of benthic microalgae on sediment components, this study took the typical silty-muddy tidal flat in Tiaozini, Jiangsu Province as the research object. Through field observations and laboratory analyses, the temporal and spatial variations and the interrelationships between benthic microalgae and sediment components were revealed. The research results show that there are temporal and spatial differences in the biomass of benthic microalgae and the particle size distribution of sediments. The biomass of benthic microalgae in autumn and winter is higher than that in spring and summer, and it is distributed in the surface layer of 0−1 cm. The median particle size in spring and summer is larger than that in autumn and winter. The difference in hydrodynamic forces on both sides of tidal channels leads to the synchronous mutation phenomenon of the biomass of benthic microalgae and sediment components. The biomass of microalgae in the convex bank area is relatively high and the sediment particle size is smaller, while in the concave bank area, the erosion is intense and the biomass decreases. Environmental conditions (such as temperature and light) and the composition of microalgae communities jointly drive the temporal and spatial changes in the relationship between benthic microalgae and sediment components. In summer, the diverse microalgae communities enhance the biostabilization effect on various sediment components, while in winter, the dominant position of diatoms strengthens the selectivity for clay and fine silt.
- tidal flat,
- benthic microalgae,
- sediment components,
- biostabilization,
- temporal and spatial distribution

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References(55)

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