Little is known about how multiple factors including land-based inputs and ocean currents affect the spatiotemporal distribution of the mycoplankton in coastal regions. To explore the seasonal changes of mycoplanktonic communities and potential environmental drivers, we collected water samples from the Yellow Sea, used here as a model for subtropical sea habitats, in different seasons over two years. Compared with winter and spring, summer exhibited higher levels of fungal richness and community heterogeneity in the water column. The seasonal shifts in mycoplankton diversity and community composition were mainly ascribed to freshwater inputs, the Cold Water Mass and invasion of the Yellow Sea Warm Current. Among the physicochemical variables tested, temperature was the primary determinant of fungal diversity and showed contrasting influences on fungal richness in the surface and bottom waters during summer. In addition, we provide evidence for the community similarity and dissolved nutrients of different water bodies to highlight the potential origin of the Cold Water Mass. Our findings bring new understanding on the factors determining the dynamics of mycoplankton communities by modelling the influence of physicochemical variables and tracking the geographical distribution of certain fungal taxa.

中文翻译：

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黄海浮游真菌的季节性动态反映了河流输入和水文条件的综合影响

关于包括陆基输入和洋流在内的多种因素如何影响沿海地区浮游真菌的时空分布知之甚少。为了探索浮游植物群落的季节性变化和潜在的环境驱动因素，我们从黄海收集了两年多不同季节的水样，用作亚热带海洋栖息地的模型。与冬季和春季相比，夏季在水体中表现出更高水平的真菌丰富度和群落异质性。浮游植物多样性和群落组成的季节性变化主要归因于淡水输入、冷水团和黄海暖流的入侵。在测试的理化变量中，温度是真菌多样性的主要决定因素，并且在夏季对地表水和底水的真菌丰富度有不同的影响。此外，我们为不同水体的群落相似性和溶解养分提供了证据，以突出冷水团的潜在来源。我们的研究结果通过对物理化学变量的影响进行建模，为决定浮游真菌群落动态的因素带来了新的理解。跟踪某些真菌类群的地理分布。