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Fluxes and budgets of biogenic elements at the sediment-water interface of Marian Cove, King George Island

Published online by Cambridge University Press:  22 February 2011

JeonGhee Shim
Affiliation:
Marine Environment Research Division, National Fisheries Research and Development Institute, 408-1 Sirang-Ri, Gijang-Up, Gijang-Gun, Busan 619-705, Korea
Young Chul Kang*
Affiliation:
Division of Polar Biology & Ocean Sciences, Korea Polar Research Institute, KORDI, Songdo Techno Park, 7-50, Songdo-Dong, Yeonsu-Gu, Incheon PO Box 32, 406-840, Korea
Dong-Jin Kang
Affiliation:
Marine Instrument Service and Calibration Department, KORDI, PO Box 29, Ansan, Seoul 425-600, Korea
Myung Woo Han
Affiliation:
Department of Biological and Physical Sciences, Columbus State Community College, 550 East Spring Street, Columbus, OH 43215, USA
*
*Corresponding author: yckangster@gmail.com

Abstract

Fluxes of dissolved oxygen and nutrients and vertical fluxes of particulate organic elements were investigated in the subtidal benthic environment of Marian Cove, King George Island, Antarctica, using in situ benthic chambers and near-bottom sediment traps. Fluxes of dissolved oxygen, ammonium, phosphate, and silicate were comparable to those measured in temperate regions. Sediment oxygen consumption was a good indicator of organic respiration and elemental efflux at the benthic boundary layer of Marian Cove, with good positive correlations with ammonia (r2 = 0.67), phosphate (r2 = 0.57), and the C:N:P ratio (106:11.5:1.15) in the chamber water. A positive relationship (r2 = 0.58) between settling particulate organic carbon flux and chl a concentration suggests that water column biomass and production are direct sources of settling particles. According to element budgets in summer assessed using the fluxes, Jin and the sum of Jout and Jburial were 15.9 ± 8.1 and 22.6 ± 8.2 mmol m-2 d-1 for carbon, 2.02 ± 0.54 and 2.46 ± 0.82 mmol m-2 d-1 for nitrogen, 0.07 ± 0.03 and 0.23 ± 0.08 mmol m-2 d-1 for phosphorus, and 12.4 ± 2.7 and 13.5 ± 5.0 mmol m-2 d-1 for silicon, respectively. There was a broad balance between sediment organic input and remineralized output for carbon and nitrogen at the benthic boundary layer of Marian Cove.

Information

Type
Biological Sciences
Copyright
Copyright © Antarctic Science Ltd 2011

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