Variations in nano- and pico-eukaryotic phytoplankton assemblages in the Qinhuangdao green-tide area

Zhang, Weiqian; Han, Hongbin; Qiu, Limei; Liu, Chao; Zhang, Qingchun; Zhou, Guizhong

doi:10.1007/s00343-022-2198-7

Cited by 2 publications

(1 citation statement)

References 64 publications

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“…Research on the combination of green tide algae and micro-and nano-phytoplankton suggests that dissolved organic nitrogen (DON) and dissolved organic phosphorus (DOP) will promote biodiversity and the growth of micro-and nanophytoplankton, and that low levels of dissolved inorganic phosphorus (DIP) will inhibit growth. In a sea environment with a suitable temperature and high concentrations of dissolved organic nitrogen (DON) and N/P, the outbreak of green tide algae will accelerate the transformation of the micro-and nanophytoplankton community from dominant diatom species to dominant dinoflagellate species (Zhang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

A numerical study on the responses of coastal water quality to river runoff after heavy rainfall in the case of a complex coastline with two artificial islands

Wang

Feng²,

Zhang³

et al. 2023

Front. Mar. Sci.

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Heavy rainfall causes large volumes of freshwater and nutrient salts to flow from rivers into the sea. This leads to major changes in the ecological environment of estuarine waters in a short period of time. The responses of the estuarine hydro-environment become more complex with the concentrated construction of artificial structures, which is a major cause of marine ecological disasters. This paper considers the Tang Estuary in Qinhuangdao, where artificial structures (e.g., ports, artificial islands, and bridges) are concentrated, as a prototype with the weak tidal dynamic environment. A nested prototype of hydrodynamics and water quality was established using a Delft3D model, with coupled waves and flows. The model was used to simulate the spatial and ephemeral characteristics of the short-term responses of ecological environmental factors, such as dissolved inorganic nitrogen (DIN), nitrate-nitrogen (i.e., NO3-N), ammonium-nitrogen (NH4-N), and orthophosphate (i.e., PO4-P), to an episode of heavy rainfall in August 2022. The results showed that concentrations of DIN and NO3-N in the source areas remain high after the flooding process. The concentration recovered to normal values approximately 5.5 days after the flooding process. In contrast, NH4-N and PO4-P showed a response with ephemeral correspondence with the flooding process, and concentration recovery took only approximately 1 day. This paper proposes two short-term response modes of pollutant diffusion, which provide help in exploring the role of hydro-environmental changes in offshore algal hazards and the effect of permeable buildings on pollutant dispersion. This additionally provides possibilities with the forecasting of red tide and green tide, and for their prevention in the future.

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Section: Introductionmentioning

confidence: 99%

A numerical study on the responses of coastal water quality to river runoff after heavy rainfall in the case of a complex coastline with two artificial islands

Wang

Feng²,

Zhang³

et al. 2023

Front. Mar. Sci.

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Distribution, community structure and assembly patterns of phytoplankton in the northern South China Sea

Zou,

Xiao,

et al. 2024

Front. Microbiol.

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A cruise was conducted in the summer of 2023 from the Pearl River Estuary (PRE) to the adjacent waters of the Xisha Islands in the northern South China Sea (NSCS) to investigate the distribution, community structure, and assembly patterns of eukaryotic and prokaryotic phytoplankton using high-throughput sequencing (HTS) and microscopic observation. Dinophyta were the most abundant phylum in the eukaryotic phytoplankton community based on HTS, accounting for 92.17% of the total amplicon sequence variants (ASVs). Syndiniales was the most abundant order among eukaryotic phytoplankton, whereas Prochlorococcus was the most abundant genus within cyanobacteria. The alpha diversity showed the lowest values in the PRE area and decreased gradually with depth, while cyanobacteria exhibited higher alpha diversity indices in the PRE and at depths ranging from 75 m to 750 m. The morphological results were different from the data based on HTS. Diatoms (37 species) dominated the phytoplankton community, with an average abundance of 3.01 × 104 cells L−1, but only six species of dinoflagellate were observed. Spearman correlation analysis and redundancy analysis (RDA) showed that the distribution and community structure of phytoplankton were largely influenced by geographical location and environmental parameters in the NSCS. The neutral community model (NCM) and null model indicated that deterministic processes played a significant role in the assembly of eukaryotic phytoplankton, with heterogeneous selection and homogeneous selection accounting for 47.27 and 29.95%, respectively. However, stochastic processes (over 60%) dominated the assembly of cyanobacteria and undominated processes accounted for 63.44%. In summary, the formation of eukaryotic phytoplankton was mainly influenced by environmental factors and geographic location, but the assembly of cyanobacteria was shaped by both stochastic processes, which accounted for over 60%, and environmental selection in the NSCS.

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Variations in nano- and pico-eukaryotic phytoplankton assemblages in the Qinhuangdao green-tide area

Cited by 2 publications

References 64 publications

A numerical study on the responses of coastal water quality to river runoff after heavy rainfall in the case of a complex coastline with two artificial islands

A numerical study on the responses of coastal water quality to river runoff after heavy rainfall in the case of a complex coastline with two artificial islands

Distribution, community structure and assembly patterns of phytoplankton in the northern South China Sea

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