College of Marine Life Sciences, Ocean University of China, Qingdao, China.
State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.
Mol Ecol. 2021 Jul;30(14):3624-3637. doi: 10.1111/mec.15986. Epub 2021 Jun 8.
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.
目前对于包括陆源输入和海流在内的多种因素如何影响沿海地区的浮游真菌的时空分布还知之甚少。为了探索浮游真菌群落的季节性变化及其潜在的环境驱动因素，我们在两年的不同季节从黄海采集水样，这里将黄海作为亚热带海洋生境的模型。与冬季和春季相比，夏季水柱中真菌丰富度和群落异质性水平更高。浮游真菌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。在所测试的理化变量中，温度是真菌多样性的主要决定因素，并且在夏季对表层和底层水中真菌丰富度的影响相反。此外，我们还提供了不同水体的群落相似性和溶解养分的证据，以突出冷水团的潜在来源。我们的研究结果通过模拟理化变量的影响和跟踪某些真菌类群的地理分布，为确定浮游真菌群落动态的因素提供了新的认识。
