The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments:preliminary results from two sites in the bathyal north-east Atlantic
Megafaunal burrows were detected in boxcores from two sites in the bathyal north-east Atlantic. Burrow contents were analysed to assess their significance to sediment radiotracer profiles and organic composition. At 1100 m depth, burrow openings up to 3 cm diameter occurred at a density of approxima...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2005
|
Subjects: | |
Online Access: | https://pure.uhi.ac.uk/en/publications/c16efe6f-5088-4cf7-b64e-474287c47a48 https://doi.org/10.1016/j.dsr.2004.09.006 |
id |
ftuhipublicatio:oai:pure.atira.dk:publications/c16efe6f-5088-4cf7-b64e-474287c47a48 |
---|---|
record_format |
openpolar |
spelling |
ftuhipublicatio:oai:pure.atira.dk:publications/c16efe6f-5088-4cf7-b64e-474287c47a48 2024-02-04T10:03:01+01:00 The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments:preliminary results from two sites in the bathyal north-east Atlantic Hughes, David Brown, L Cook, G T Cowie, G Gage, John D Good, E Kennedy, H MacKenzie, A B Papadimitriou, S Shimmield, Graham B Thomson, J Williams, M 2005 https://pure.uhi.ac.uk/en/publications/c16efe6f-5088-4cf7-b64e-474287c47a48 https://doi.org/10.1016/j.dsr.2004.09.006 eng eng info:eu-repo/semantics/restrictedAccess Hughes , D , Brown , L , Cook , G T , Cowie , G , Gage , J D , Good , E , Kennedy , H , MacKenzie , A B , Papadimitriou , S , Shimmield , G B , Thomson , J & Williams , M 2005 , ' The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments : preliminary results from two sites in the bathyal north-east Atlantic ' , DEEP-SEA RES PT II , no. 2 , pp. 1-13 . https://doi.org/10.1016/j.dsr.2004.09.006 FLOOR CONTINENTAL-SLOPE LEBENSSPUREN STEREOBALANUS-CANADENSIS SPENGEL CAROLINA SLOPE Oceanography TRANSPORT PB-210 CENTRAL EQUATORIAL PACIFIC MIXING RATES BIOTURBATION article 2005 ftuhipublicatio https://doi.org/10.1016/j.dsr.2004.09.006 2024-01-11T23:20:49Z Megafaunal burrows were detected in boxcores from two sites in the bathyal north-east Atlantic. Burrow contents were analysed to assess their significance to sediment radiotracer profiles and organic composition. At 1100 m depth, burrow openings up to 3 cm diameter occurred at a density of approximately 5 m(-2). Burrows at 12-18 cm sediment depth extending horizontally for up to 35 cm and linked to the surface by vertical shafts were provisionally attributed to echiuran worms, although no occupants were found in situ. In one example the horizontal burrow section was filled with green slurry, for which scanning electron microscopy, Pb-210(excess) and organic content all indicated a phytodetrital origin. At 1920 m depth no large burrow openings were found in five boxcores examined, but large subsurface biogenic structures were present. Galleries at 15-26 cm depth were traced horizontally for up to 30 cm, but contained no occupants or filling. Extended linear bands of faecal pellets were found in three boxcores at 13-17 cm. depth. Excess Pb-210 content indicated that most of these structures resulted from surface deposit feeding. Faecal pellet bands may partially explain the occurrence of subsurface peaks detected in profiles of Pb-210(excess) at this site. Results suggest that 'caching' of phytodetritus and subsurface deposition of faeces are two mechanisms for the rapid, deep burial of relatively fresh organic matter, but the significance of these processes to sediment geochemistry cannot be quantified without much information on the distribution, identity and abundance of burrowing megafauna in the deep sea. (C) 2004 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper North East Atlantic University of the Highlands and Islands: Research Database of UHI Burrows ENVELOPE(163.650,163.650,-74.300,-74.300) Pacific Deep Sea Research Part I: Oceanographic Research Papers 52 1 1 13 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
FLOOR CONTINENTAL-SLOPE LEBENSSPUREN STEREOBALANUS-CANADENSIS SPENGEL CAROLINA SLOPE Oceanography TRANSPORT PB-210 CENTRAL EQUATORIAL PACIFIC MIXING RATES BIOTURBATION |
spellingShingle |
FLOOR CONTINENTAL-SLOPE LEBENSSPUREN STEREOBALANUS-CANADENSIS SPENGEL CAROLINA SLOPE Oceanography TRANSPORT PB-210 CENTRAL EQUATORIAL PACIFIC MIXING RATES BIOTURBATION Hughes, David Brown, L Cook, G T Cowie, G Gage, John D Good, E Kennedy, H MacKenzie, A B Papadimitriou, S Shimmield, Graham B Thomson, J Williams, M The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments:preliminary results from two sites in the bathyal north-east Atlantic |
topic_facet |
FLOOR CONTINENTAL-SLOPE LEBENSSPUREN STEREOBALANUS-CANADENSIS SPENGEL CAROLINA SLOPE Oceanography TRANSPORT PB-210 CENTRAL EQUATORIAL PACIFIC MIXING RATES BIOTURBATION |
description |
Megafaunal burrows were detected in boxcores from two sites in the bathyal north-east Atlantic. Burrow contents were analysed to assess their significance to sediment radiotracer profiles and organic composition. At 1100 m depth, burrow openings up to 3 cm diameter occurred at a density of approximately 5 m(-2). Burrows at 12-18 cm sediment depth extending horizontally for up to 35 cm and linked to the surface by vertical shafts were provisionally attributed to echiuran worms, although no occupants were found in situ. In one example the horizontal burrow section was filled with green slurry, for which scanning electron microscopy, Pb-210(excess) and organic content all indicated a phytodetrital origin. At 1920 m depth no large burrow openings were found in five boxcores examined, but large subsurface biogenic structures were present. Galleries at 15-26 cm depth were traced horizontally for up to 30 cm, but contained no occupants or filling. Extended linear bands of faecal pellets were found in three boxcores at 13-17 cm. depth. Excess Pb-210 content indicated that most of these structures resulted from surface deposit feeding. Faecal pellet bands may partially explain the occurrence of subsurface peaks detected in profiles of Pb-210(excess) at this site. Results suggest that 'caching' of phytodetritus and subsurface deposition of faeces are two mechanisms for the rapid, deep burial of relatively fresh organic matter, but the significance of these processes to sediment geochemistry cannot be quantified without much information on the distribution, identity and abundance of burrowing megafauna in the deep sea. (C) 2004 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Hughes, David Brown, L Cook, G T Cowie, G Gage, John D Good, E Kennedy, H MacKenzie, A B Papadimitriou, S Shimmield, Graham B Thomson, J Williams, M |
author_facet |
Hughes, David Brown, L Cook, G T Cowie, G Gage, John D Good, E Kennedy, H MacKenzie, A B Papadimitriou, S Shimmield, Graham B Thomson, J Williams, M |
author_sort |
Hughes, David |
title |
The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments:preliminary results from two sites in the bathyal north-east Atlantic |
title_short |
The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments:preliminary results from two sites in the bathyal north-east Atlantic |
title_full |
The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments:preliminary results from two sites in the bathyal north-east Atlantic |
title_fullStr |
The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments:preliminary results from two sites in the bathyal north-east Atlantic |
title_full_unstemmed |
The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments:preliminary results from two sites in the bathyal north-east Atlantic |
title_sort |
effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments:preliminary results from two sites in the bathyal north-east atlantic |
publishDate |
2005 |
url |
https://pure.uhi.ac.uk/en/publications/c16efe6f-5088-4cf7-b64e-474287c47a48 https://doi.org/10.1016/j.dsr.2004.09.006 |
long_lat |
ENVELOPE(163.650,163.650,-74.300,-74.300) |
geographic |
Burrows Pacific |
geographic_facet |
Burrows Pacific |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Hughes , D , Brown , L , Cook , G T , Cowie , G , Gage , J D , Good , E , Kennedy , H , MacKenzie , A B , Papadimitriou , S , Shimmield , G B , Thomson , J & Williams , M 2005 , ' The effect of megafaunal burrows on radiotracer profiles and organic composition in deep-sea sediments : preliminary results from two sites in the bathyal north-east Atlantic ' , DEEP-SEA RES PT II , no. 2 , pp. 1-13 . https://doi.org/10.1016/j.dsr.2004.09.006 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr.2004.09.006 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
52 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
13 |
_version_ |
1789970151349682176 |