期刊
SCIENTIFIC REPORTS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep22633
关键词
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资金
- National Science Foundation [0826659, 1235169]
- Austrian Science Fund (FWF) [I486-B09, P23234-B11]
- European Research Council under the European Community [268595]
- Austrian Science Fund (FWF) [Z 194] Funding Source: researchfish
- Directorate For Geosciences
- Division Of Ocean Sciences [1235169] Funding Source: National Science Foundation
- Division Of Ocean Sciences
- Directorate For Geosciences [0826659] Funding Source: National Science Foundation
- Austrian Science Fund (FWF) [Z194] Funding Source: Austrian Science Fund (FWF)
Particles are the major vector for the transfer of carbon from the upper ocean to the deep sea. However, little is known about their abundance, composition and role at depths greater than 2000 m. We present the first number-size spectrum of bathy-and abyssopelagic particles to a depth of 5500 m based on surveys performed with a custom-made holographic microscope. The particle spectrum was unusual in that particles of several millimetres in length were almost 100 times more abundant than expected from the number spectrum of smaller particles, thereby meeting the definition of dragon kings. Marine snow particles overwhelmingly contributed to the total particle volume (95-98%). Approximately 1/3 of the particles in the dragon-king size domain contained large amounts of transparent exopolymers with little ballast, which likely either make them neutrally buoyant or cause them to sink slowly. Dragon-king particles thus provide large volumes of unique microenvironments that may help to explain discrepancies in deep-sea biogeochemical budgets.
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