Spatial and temporal patterns of mineralization rates and oxygen distribution in a permeable intertidal sand flat (Sylt, Germany)

Werner, Ursula, Billerbeck, Markus, Polerecky, Lubos, Franke, Ulrich, Huettel, Markus, van Beusekom, Justus E. E. and de Beer, Dirk (2006) Spatial and temporal patterns of mineralization rates and oxygen distribution in a permeable intertidal sand flat (Sylt, Germany). Limnology and Oceanography, 51 6: 2549-2563. doi:10.4319/lo.2006.51.6.2549

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Author Werner, Ursula
Billerbeck, Markus
Polerecky, Lubos
Franke, Ulrich
Huettel, Markus
van Beusekom, Justus E. E.
de Beer, Dirk
Title Spatial and temporal patterns of mineralization rates and oxygen distribution in a permeable intertidal sand flat (Sylt, Germany)
Journal name Limnology and Oceanography   Check publisher's open access policy
ISSN 0024-3590
1939-5590
Publication date 2006-11
Year available 2006
Sub-type Article (original research)
DOI 10.4319/lo.2006.51.6.2549
Open Access Status File (Publisher version)
Volume 51
Issue 6
Start page 2549
End page 2563
Total pages 15
Place of publication Waco, TX, United States
Publisher American Society of Limnology and Oceanography
Language eng
Subject 060205 Marine and Estuarine Ecology (incl. Marine Ichthyology)
Abstract Oxygen distribution and benthic mineralization rates were investigated in a permeable intertidal sand flat (permeability: 3.9 x 10-11 m2) in a transect from the low toward the high waterline. At all stations, oxygen penetrated several millimeters to centimeters into the sediments during inundation because of pore-water advection. The wave- and current-driven deep oxygen penetration caused high oxygen consumption rates (OCRs) and high aerobic mineralization rates at all stations. Because oxygen penetration was enhanced during inundation, 71–90% of the daily oxygen consumption took place in that period. OCRs and sulfate reduction rates (SRRs) changed with inundation time of the stations, emphasizing the importance of pore-water advection for benthic mineralization: OCRs were elevated at the lower flat in summer (lower flat 131–187; middle and upper flat 64–108 mmol C m-2 d-1). SRRs increased sharply from the high to the low waterline during all seasons (e.g., in summer: lower flat 18–40; middle flat 8.8–9.4, upper flat 0.5–4 mmol C m-2 d-1). A one-dimensional model of the advective organic matter supply to the sediment could only explain a fraction of the organic carbon required for benthic mineralization. This suggests that either transport of particles via the seawater is more efficient than the one-dimensional concept can explain or that additional carbon was supplied through other sources (e.g., benthic photosynthesis). Mineralization rates were higher in summer than in winter. Only in summer did sulfate reduction contribute >20% to total mineralization.
Keyword Limnology
Oceanography
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Advanced Water Management Centre Publications
 
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Created: Wed, 04 Feb 2009, 09:41:51 EST by Ms Karen Naughton on behalf of Advanced Water Management Centre