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Updated: Jan 15, 2026

Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology
Published on: November 5, 2014
Variational microeukaryotic community diversity through wide-bound Antarctic water masses
Jiyuan Wan1, Furong Cao1, Wangxinze Shu1
1College of Marine Life Sciences, and Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, 266003, China.
Abstract:
The Southern Ocean, with its unique environmental characteristics, has shaped special microeukaryotic communities. However, little is known about the community compositions, interactions, and community assembly processes of the microeukaryotic communities in the Southern Ocean. To explore these doubts, a total of 208 samples were analyzed from four different water layers (surface, deep chlorophyll maximum, oxygen minimum zone, and bottom) in the Cosmonaut Sea and the adjacent waters of Antarctic Peninsula. The α-diversity of the microeukaryotic communities in the lower-middle (oxygen minimum zone and bottom) waters is higher than upper-middle (surface and deep chlorophyll maximum). Depth, dissolved oxygen and salinity are momentous factors influencing the differences in microeukaryotic communities among different water layers. Remarkably, the co-occurrence network analysis reveals that the microeukaryotes in the lower-middle waters of the two seas were more complex in composition, stronger in interaction and more stable in community. In addition, the analysis of phylogenetic component pointed to stochastic processes as the primary driver of the assembly of Antarctic microeukaryotic communities. This study provides valuable insights into the diversity and assembly mechanisms of microeukaryotes under complex hydrological conditions in Southern Ocean.
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