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Cited by 425

The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.

Bacterial vs. zooplankton control of sinking particle flux in the ocean's twilight zone

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Steinberg, Deborah K., Van Mooy, Benjamin A. S., Buesseler, Ken O., Boyd, Philip W., Kobari, Toru, Karl, David M.·2008·Limnology and Oceanography

Abstract

The downward flux of particulate organic carbon (POC) decreases significantly in the oceanÂs mesopelagic or ‘twilight’ zone due both to abiotic processes and metabolism by resident biota. Bacteria and zooplankton solubilize and consume POC to support their metabolism, but the relative importance of bacteria vs. zooplankton in the consumption of sinking particles in the twilight zone is unknown. We compared losses of sinking POC, using differences in export flux measured by neutrally buoyant sediment traps at a range of depths, with bacteria and zooplankton metabolic requirements at the Hawaii Ocean Time‐series station ALOHA in the subtropical Pacific and the Japanese times‐series site K2 in the subarctic Pacific. Integrated (150‐1,000 m) mesopelagic bacterial C demand exceeded that of zooplankton by up to 3‐fold at ALOHA, while bacteria and zooplankton required relatively equal amounts of POC at K2. However, sinking POC flux was inadequate to meet metabolic demands at either site. Mesopelagic bacterial C demand was 3‐ to 4‐fold (ALOHA), and 10‐fold (K2) greater than the loss of sinking POC flux, while zooplankton C demand was 1‐ to 2‐fold (ALOHA), and 3‐ to 9‐fold (K2) greater (using our ‘middle’ estimate conversion factors to calculate C demand). Assuming the particle flux estimates are accurate, we posit that this additional C demand must be met by diel vertical migration of zooplankton feeding at the surface and by carnivory at depth—with both processes ultimately supplying organic C to mesopelagic bacteria. These pathways need to be incorporated into biogeochemical models that predict global C sequestration in the deep sea.

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Metadata

Authors
Steinberg, D. K., Van Mooy, B. A. S., Buesseler, K. O., Boyd, P. W., Kobari, T., & Karl, D. M.
Venue
Limnology and Oceanography
Publisher
Wiley
Published
2008-07
Volume
53
Issue
4
Pages
1327-1338
ISSN
  • 0024-3590 (ISSN-L)
  • 1939-5590
OpenAlex
W2129988190
Cited by
425
References
25
FWCI
13.97
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Bacterial vs. zooplankton control of sinking particle flux in the ocean's twilight zone. https://app.cochat.ai/papers/10.4319/lo.2008.53.4.1327
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Steinberg, D. K., Van Mooy, B. A. S., Buesseler, K. O., Boyd, P. W., Kobari, T., & Karl, D. M. (2008). Bacterial vs. zooplankton control of sinking particle flux in the ocean's twilight zone. Limnology and Oceanography. https://doi.org/10.4319/lo.2008.53.4.1327

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