期刊
SCIENCE
卷 323, 期 5917, 页码 1067-1070出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1167334
关键词
-
资金
- National Defense Science and Engineering Graduate Fellowship
- Department of Energy [W31-109-ENG38]
- NSF [OCE 0526241, OCE CAREER 0744641]
- MIT's Earth Systems Initiative
- Doherty Professorship
Thin layers of phytoplankton are important hotspots of ecological activity that are found in the coastal ocean, meters beneath the surface, and contain cell concentrations up to two orders of magnitude above ambient concentrations. Current interpretations of their formation favor abiotic processes, yet many phytoplankton species found in these layers are motile. We demonstrated that layers formed when the vertical migration of phytoplankton was disrupted by hydrodynamic shear. This mechanism, which we call gyrotactic trapping, can be responsible for the thin layers of phytoplankton commonly observed in the ocean. These results reveal that the coupling between active microorganism motility and ambient fluid motion can shape the macroscopic features of the marine ecological landscape.
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