English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Pore-water advection and solute fluxes in permeable marine sediments (II): Benthic respiration at three sandy sites with different permeabilities (German Bight, North Sea)

Janssen, F., Huettel, M., & Witte, U. (2005). Pore-water advection and solute fluxes in permeable marine sediments (II): Benthic respiration at three sandy sites with different permeabilities (German Bight, North Sea). Limnology and Oceanography, 50(3), 779-792.

Item is

Files

show Files
hide Files
:
Janssen5.pdf (Publisher version), 343KB
Name:
Janssen5.pdf
Description:
-
OA-Status:
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Janssen, F.1, Author           
Huettel, M.2, Author           
Witte, U.2, Author           
Affiliations:
1HGF MPG Joint Research Group for Deep Sea Ecology & Technology, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481702              
2Flux Group, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481701              

Content

show
hide
Free keywords: -
 Abstract: This contribution presents total oxygen uptake (TOU) rates and nutrient fluxes of organically poor permeable shelf sands of the German Bight. Measurements have been made in situ with the novel autonomous benthic chamber system Sandy under controlled conditions of advective pore‐water exchange. Average oxygen consumption rates of 31.3 ± 18.2 mmol m−2 d−1 measured in this study were relatively high as compared with rates reported from shelf sediments with much higher organic contents. TOU of highly permeable medium and coarse grained sands was substantially enhanced in the presence of advection. This indicates that advective oxygen supply contributed significantly to respiration in these sediments and that advection has to be considered when assessing oxygen consumption and organic matter mineralization in shelf areas. In fine‐grained, less permeable sands, no effect of advection could be measured. A lower advective oxygen supply in these sediments is in agreement with a release of ammonium instead of nitrate and a shallower oxygen penetration depth. Scaled up to the entire German Bight, the results imply that in 40% of the area an effect of advection on benthic oxygen uptake and other advectionrelated processes can be largely excluded, while in the remaining 60% significant pore‐water advection potentially takes place. However, because permeabilities of the sediments investigated in this study were widely spaced, a significant effect on oxygen supply was only verified for highly permeable sands that are likely to cover approximately 3% of the area.

Details

show
hide
Language(s): eng - English
 Dates: 2005-05-16
 Publication Status: Issued
 Pages: 14
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 249959
ISI: 000229243700004
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Limnology and Oceanography
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Waco, Tex., etc. : American Society of Limnology and Oceanography.
Pages: - Volume / Issue: 50 (3) Sequence Number: - Start / End Page: 779 - 792 Identifier: ISSN: 0024-3590
CoNE: https://pure.mpg.de/cone/journals/resource/954925421091