Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes
It is manifest in the study of dysoxic sediments from the geological record that infaunal burrowing is considered so severely limited by the lack of dissolved oxygen as to be nonexistent. Although the effects of megafauna and macrofauna on sedimentary and geochemical processes are well known, the ef...
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2001
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ftuglasgow:oai:eprints.gla.ac.uk:121691 2023-05-15T14:04:48+02:00 Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes Pike, Jennifer Bernhard, Joan M. Moreton, Steven G. Butler, Ian B. 2001-10 http://eprints.gla.ac.uk/121691/ http://geology.gsapubs.org/content/29/10/923.abstract unknown Geological Society of America Pike, J., Bernhard, J. M., Moreton, S. G. <http://eprints.gla.ac.uk/view/author/11570.html> and Butler, I. B. (2001) Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes. Geology <http://eprints.gla.ac.uk/view/journal_volume/Geology.html>, 29(10), p. 923. Articles PeerReviewed 2001 ftuglasgow 2020-01-10T01:09:42Z It is manifest in the study of dysoxic sediments from the geological record that infaunal burrowing is considered so severely limited by the lack of dissolved oxygen as to be nonexistent. Although the effects of megafauna and macrofauna on sedimentary and geochemical processes are well known, the effects of meiofauna are largely ignored. Here we document abundant meiofauna in the recent severely dysoxic, laminated sediments from the Santa Barbara basin, California margin, and also microcavities and microtunnels in laminated deglacial sediments from Palmer Deep, west Antarctic Peninsula, that we interpret to be open, relict nematode burrows. Santa Barbara basin box-core subcores were sieved to quantify metazoan abundance, and others were embedded with resin for examination of meiofaunal life positions using confocal microscopy. Metazoan densities in the surface centimeters of sediment range from 80.7 to 117.9 cm−3, and nematode populations, together with their abundant burrows, remain quite high to at least 3 cm. Scanning electron microscope analysis of fractured surfaces in Palmer Deep sediments revealed that the rigid diatom ooze framework aids the preservation of ∼50 μm diameter open nematode burrows. These structures were observed to at least 40 m below the seafloor surface. This is the first description of a nematode-produced open burrow network preserved in the geological record. Optical microscopy of resin-embedded thin sections revealed widespread sediment redistribution without significant lamina disruption. The implications of abundant nematode burrows in surface sediments, and their preservation in the geological record, are wide ranging for both modern and ancient dysoxic marine environments, including for determining early sediment fabric production, geochemical processes, and diagenetic reactions in the oxic and suboxic zones. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula University of Glasgow: Enlighten - Publications Antarctic Antarctic Peninsula Burrows ENVELOPE(163.650,163.650,-74.300,-74.300) Palmer Deep ENVELOPE(-64.400,-64.400,-64.950,-64.950) |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
description |
It is manifest in the study of dysoxic sediments from the geological record that infaunal burrowing is considered so severely limited by the lack of dissolved oxygen as to be nonexistent. Although the effects of megafauna and macrofauna on sedimentary and geochemical processes are well known, the effects of meiofauna are largely ignored. Here we document abundant meiofauna in the recent severely dysoxic, laminated sediments from the Santa Barbara basin, California margin, and also microcavities and microtunnels in laminated deglacial sediments from Palmer Deep, west Antarctic Peninsula, that we interpret to be open, relict nematode burrows. Santa Barbara basin box-core subcores were sieved to quantify metazoan abundance, and others were embedded with resin for examination of meiofaunal life positions using confocal microscopy. Metazoan densities in the surface centimeters of sediment range from 80.7 to 117.9 cm−3, and nematode populations, together with their abundant burrows, remain quite high to at least 3 cm. Scanning electron microscope analysis of fractured surfaces in Palmer Deep sediments revealed that the rigid diatom ooze framework aids the preservation of ∼50 μm diameter open nematode burrows. These structures were observed to at least 40 m below the seafloor surface. This is the first description of a nematode-produced open burrow network preserved in the geological record. Optical microscopy of resin-embedded thin sections revealed widespread sediment redistribution without significant lamina disruption. The implications of abundant nematode burrows in surface sediments, and their preservation in the geological record, are wide ranging for both modern and ancient dysoxic marine environments, including for determining early sediment fabric production, geochemical processes, and diagenetic reactions in the oxic and suboxic zones. |
format |
Article in Journal/Newspaper |
author |
Pike, Jennifer Bernhard, Joan M. Moreton, Steven G. Butler, Ian B. |
spellingShingle |
Pike, Jennifer Bernhard, Joan M. Moreton, Steven G. Butler, Ian B. Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes |
author_facet |
Pike, Jennifer Bernhard, Joan M. Moreton, Steven G. Butler, Ian B. |
author_sort |
Pike, Jennifer |
title |
Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes |
title_short |
Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes |
title_full |
Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes |
title_fullStr |
Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes |
title_full_unstemmed |
Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes |
title_sort |
microbioirrigation of marine sediments in dysoxic environments: implications for early sediment fabric formation and diagenetic processes |
publisher |
Geological Society of America |
publishDate |
2001 |
url |
http://eprints.gla.ac.uk/121691/ http://geology.gsapubs.org/content/29/10/923.abstract |
long_lat |
ENVELOPE(163.650,163.650,-74.300,-74.300) ENVELOPE(-64.400,-64.400,-64.950,-64.950) |
geographic |
Antarctic Antarctic Peninsula Burrows Palmer Deep |
geographic_facet |
Antarctic Antarctic Peninsula Burrows Palmer Deep |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
Pike, J., Bernhard, J. M., Moreton, S. G. <http://eprints.gla.ac.uk/view/author/11570.html> and Butler, I. B. (2001) Microbioirrigation of marine sediments in dysoxic environments: Implications for early sediment fabric formation and diagenetic processes. Geology <http://eprints.gla.ac.uk/view/journal_volume/Geology.html>, 29(10), p. 923. |
_version_ |
1766276134279839744 |