Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland):opening a new window into early Phanerozoic benthic ecology
Widespread microbial mats and the absence of significant bioturbation resulted in a poorly developed mixed layer and extensive cohesive substrates during the Ediacaran-Cambrian transition. Large nonbiomineralized arthropod carapaces overprinted with trails, interconnected burrow systems, narrow-cali...
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2012
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Online Access: | https://curis.ku.dk/portal/da/publications/nonbiomineralized-carapaces-in-cambrian-seafloor-landscapes-sirius-passet-greenland(852bf61b-d8b8-4bec-909a-eda670f71083).html https://doi.org/10.1130/G32853.1 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/852bf61b-d8b8-4bec-909a-eda670f71083 2023-10-25T01:39:04+02:00 Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland):opening a new window into early Phanerozoic benthic ecology Mangano, M. Gabriela Bromley, Richard Granville Harper, David A. T. Nielsen, Arne Thorshøj Smith, M. Paul Vinther, Jakob 2012 https://curis.ku.dk/portal/da/publications/nonbiomineralized-carapaces-in-cambrian-seafloor-landscapes-sirius-passet-greenland(852bf61b-d8b8-4bec-909a-eda670f71083).html https://doi.org/10.1130/G32853.1 eng eng info:eu-repo/semantics/closedAccess Mangano , M G , Bromley , R G , Harper , D A T , Nielsen , A T , Smith , M P & Vinther , J 2012 , ' Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland) : opening a new window into early Phanerozoic benthic ecology ' , Geology , vol. 40 , no. 6 , pp. 519-522 . https://doi.org/10.1130/G32853.1 article 2012 ftcopenhagenunip https://doi.org/10.1130/G32853.1 2023-09-27T22:59:35Z Widespread microbial mats and the absence of significant bioturbation resulted in a poorly developed mixed layer and extensive cohesive substrates during the Ediacaran-Cambrian transition. Large nonbiomineralized arthropod carapaces overprinted with trails, interconnected burrow systems, narrow-caliber structures with dendritic terminations, and annulated burrows are abundant in the Early Cambrian Sirius Basset Lagerstatte (Greenland). Taphonomic controls were partially responsible for the pronounced association of these structures and carapaces, but ecologic conditions are envisioned as playing a significant role. Although some trace fossils (e.g., annulated structures) may be related to scavenging and/or deposit feeding, morphologic evidence suggests that this is not always the case. Interconnected burrow systems provide evidence for re-use of structures, suggesting grazing on or farming of bacteria. Sulfur bacteria were probably abundant in Cambrian sediments, requiring a source of sulfur or sulfide and limited quantities of oxygen. Anoxic sediment provided a source of hydrogen sulfide, whereas burrow outlets connected to the oxygenated sediment-water interface. Carcasses and molds of nonbiomineralized organisms may have acted as attractors, supporting a community of small invertebrates. Carapaces created a sharp boundary, further decreasing oxygen diffusion into the sediment. This steep oxygen gradient at the organic surface of the carapace promoted the growth of sulfur bacteria that could have served as the primary food for small macrofauna and meiofauna. Article in Journal/Newspaper Greenland University of Copenhagen: Research Burrows ENVELOPE(163.650,163.650,-74.300,-74.300) Greenland Sirius ENVELOPE(163.250,163.250,-84.133,-84.133) Geology 40 6 519 522 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Widespread microbial mats and the absence of significant bioturbation resulted in a poorly developed mixed layer and extensive cohesive substrates during the Ediacaran-Cambrian transition. Large nonbiomineralized arthropod carapaces overprinted with trails, interconnected burrow systems, narrow-caliber structures with dendritic terminations, and annulated burrows are abundant in the Early Cambrian Sirius Basset Lagerstatte (Greenland). Taphonomic controls were partially responsible for the pronounced association of these structures and carapaces, but ecologic conditions are envisioned as playing a significant role. Although some trace fossils (e.g., annulated structures) may be related to scavenging and/or deposit feeding, morphologic evidence suggests that this is not always the case. Interconnected burrow systems provide evidence for re-use of structures, suggesting grazing on or farming of bacteria. Sulfur bacteria were probably abundant in Cambrian sediments, requiring a source of sulfur or sulfide and limited quantities of oxygen. Anoxic sediment provided a source of hydrogen sulfide, whereas burrow outlets connected to the oxygenated sediment-water interface. Carcasses and molds of nonbiomineralized organisms may have acted as attractors, supporting a community of small invertebrates. Carapaces created a sharp boundary, further decreasing oxygen diffusion into the sediment. This steep oxygen gradient at the organic surface of the carapace promoted the growth of sulfur bacteria that could have served as the primary food for small macrofauna and meiofauna. |
format |
Article in Journal/Newspaper |
author |
Mangano, M. Gabriela Bromley, Richard Granville Harper, David A. T. Nielsen, Arne Thorshøj Smith, M. Paul Vinther, Jakob |
spellingShingle |
Mangano, M. Gabriela Bromley, Richard Granville Harper, David A. T. Nielsen, Arne Thorshøj Smith, M. Paul Vinther, Jakob Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland):opening a new window into early Phanerozoic benthic ecology |
author_facet |
Mangano, M. Gabriela Bromley, Richard Granville Harper, David A. T. Nielsen, Arne Thorshøj Smith, M. Paul Vinther, Jakob |
author_sort |
Mangano, M. Gabriela |
title |
Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland):opening a new window into early Phanerozoic benthic ecology |
title_short |
Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland):opening a new window into early Phanerozoic benthic ecology |
title_full |
Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland):opening a new window into early Phanerozoic benthic ecology |
title_fullStr |
Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland):opening a new window into early Phanerozoic benthic ecology |
title_full_unstemmed |
Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland):opening a new window into early Phanerozoic benthic ecology |
title_sort |
nonbiomineralized carapaces in cambrian seafloor landscapes (sirius passet, greenland):opening a new window into early phanerozoic benthic ecology |
publishDate |
2012 |
url |
https://curis.ku.dk/portal/da/publications/nonbiomineralized-carapaces-in-cambrian-seafloor-landscapes-sirius-passet-greenland(852bf61b-d8b8-4bec-909a-eda670f71083).html https://doi.org/10.1130/G32853.1 |
long_lat |
ENVELOPE(163.650,163.650,-74.300,-74.300) ENVELOPE(163.250,163.250,-84.133,-84.133) |
geographic |
Burrows Greenland Sirius |
geographic_facet |
Burrows Greenland Sirius |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Mangano , M G , Bromley , R G , Harper , D A T , Nielsen , A T , Smith , M P & Vinther , J 2012 , ' Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland) : opening a new window into early Phanerozoic benthic ecology ' , Geology , vol. 40 , no. 6 , pp. 519-522 . https://doi.org/10.1130/G32853.1 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1130/G32853.1 |
container_title |
Geology |
container_volume |
40 |
container_issue |
6 |
container_start_page |
519 |
op_container_end_page |
522 |
_version_ |
1780734250141614080 |