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  Benthic community responses to pulses in pelagic food supply: North Pacific Subtropical Gyre

Smith, K. L., Baldwin, R. J., Karl, D. M., & Boetius, A. (2002). Benthic community responses to pulses in pelagic food supply: North Pacific Subtropical Gyre. Deep-Sea Research Part I-Oceanographic Research Papers, 49(6), 971-990.

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Boetius2.pdf (Publisher version), 457KB
 
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 Creators:
Smith, K. L., Author
Baldwin, R. J., Author
Karl, D. M., Author
Boetius, A.1, Author              
Affiliations:
1HGF MPG Joint Research Group for Deep Sea Ecology & Technology, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481702              

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Free keywords: benthic community; abyssal zone; North Pacific Ocean; carbon cycling
 Abstract: Time-series measurements of particulate organic carbon (POC) and particulate nitrogen (PN) fluxes, sediment community composition, and sediment community oxygen consumption (SCOC) were made at the Hawaii Ocean Time-series station (Sta. ALOHA, 4730 m depth) between December 1997 and January 1999. POC and PN fluxes, estimated from sediment trap collections made at 4000 m depth (730 m above bottom), peaked in late August and early September 1998. SCOC was measured in situ using a free vehicle grab respirometer that also recovered sediments for chemical and biological analyses on six cruises during the 1- year study. Surface sediment organic carbon, total nitrogen and phaeopigments significantly increased in September, corresponding to the pulses in particulate matter fluxes. Bacterial abundance in the surface sediment was highest in September with a subsurface high in November. Sediment macrofauna were numerically dominated by agglutinating Foraminifera fragments with highest density in September. Metazoan abundance, dominated by nematodes was also highest in September. SCOC significantly increased from a low in February to a high in September. POC and PN fluxes at 730 m above bottom were significantly correlated with SCOC with a lag time of less than or equal to 14 days, linking pelagic food supply with benthic processes in the oligotrophic North Pacific gyre. The annual supply of POC into the abyss compared to the estimated annual demand by the sediment community (POC:SCOC) indicates that only 65% of the food demand is met by the supply of organic carbon. (C) 2002 Elsevier Science Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2002-06
 Publication Status: Published in print
 Pages: 20
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 13855
ISI: 000177020200002
 Degree: -

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Title: Deep-Sea Research Part I-Oceanographic Research Papers
  Other : Deep-Sea Res. Part I-Oceanogr. Res. Pap.
Source Genre: Journal
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Publ. Info: Oxford [England] : Pergamon
Pages: - Volume / Issue: 49 (6) Sequence Number: - Start / End Page: 971 - 990 Identifier: ISSN: 0967-0637
CoNE: https://pure.mpg.de/cone/journals/resource/954928546256