scholarly journals Estimating the effect of burrowing shrimp on deep-sea sediment community oxygen consumption

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3309 ◽  
Author(s):  
Daniel Leduc ◽  
Conrad A. Pilditch
Keyword(s):  
Oxygen Consumption ◽  
Oxygen Uptake ◽  
Continental Slope ◽  
Deep Sea ◽  
Sediment Cores ◽  
Chemical Oxidation ◽  
Community Respiration ◽  
Deep Sea Sediment ◽  
Benthic Respiration ◽  
Infaunal Community

Sediment community oxygen consumption (SCOC) is a proxy for organic matter processing and thus provides a useful proxy of benthic ecosystem function. Oxygen uptake in deep-sea sediments is mainly driven by bacteria, and the direct contribution of benthic macro- and mega-infauna respiration is thought to be relatively modest. However, the main contribution of infaunal organisms to benthic respiration, particularly large burrowing organisms, is likely to be indirect and mainly driven by processes such as feeding and bioturbation that stimulate bacterial metabolism and promote the chemical oxidation of reduced solutes. Here, we estimate the direct and indirect contributions of burrowing shrimp (Eucalastacus cf. torbeni) to sediment community oxygen consumption based on incubations of sediment cores from 490 m depth on the continental slope of New Zealand. Results indicate that the presence of one shrimp in the sediment is responsible for an oxygen uptake rate of about 40 µmol d−1, only 1% of which is estimated to be due to shrimp respiration. We estimate that the presence of ten burrowing shrimp m−2 of seabed would lead to an oxygen uptake comparable to current estimates of macro-infaunal community respiration on Chatham Rise based on allometric equations, and would increase total sediment community oxygen uptake by 14% compared to sediment without shrimp. Our findings suggest that oxygen consumption mediated by burrowing shrimp may be substantial in continental slope ecosystems.

Seasonal Changes in Oxygen Uptake by Settled Particulate Matter and Sediments in a Marine Bay

1978 ◽  
Vol 35 (12) ◽  
pp. 1621-1628 ◽  
Author(s):  
B. T. Hargrave
Keyword(s):  
Oxygen Consumption ◽  
Particulate Matter ◽  
Oxygen Uptake ◽  
Seasonal Changes ◽  
Sediment Cores ◽  
Late Summer ◽  
Sediment Traps ◽  
Chemical Oxidation ◽  
Organic Content ◽  
Carbon Equivalent

Oxygen consumption by material deposited in sediment traps suspended at different depths in a coastal marine bay was highest during summer. Seasonal changes in respiration (Formalin sensitive oxygen uptake) were significantly correlated with organic content and highest rates on a dry and organic weight basis occurred during summer. There was no consistent depth-related change in oxygen uptake but seasonal changes in respiration were significantly correlated over consecutive 10-m depth intervals between 20 and 60 m. Rates of respiration and chemical oxidation by undisturbed sediment cores from 60 m, which were maximum during late summer, were not related to seasonal changes in temperature or dissolved oxygen concentration. A 1–2-mo delay existed between the deposition of particulate matter with maximum rates of oxygen consumption and maximum oxygen uptake by bottom sediments. Similar seasonal changes and calculation of the carbon equivalent of sediment respiration, however, show that oxidation of settled organic matter is largely complete within the year of deposition. Key words: sedimentation, particulate matter, biological and chemical oxidation, marine sediments

scholarly journals Identification and correlation of distal tephra layers in deep-sea sediment cores, Scotia Sea, Antarctica

1998 ◽  
Vol 27 ◽  
pp. 285-289 ◽  
Author(s):  
S. G. Moreton ◽  
J. L. Smellie
Keyword(s):  
Deep Sea ◽  
Volcanic Ash ◽  
Sediment Cores ◽  
Quaternary Deposits ◽  
Deep Sea Sediment ◽  
Scotia Sea ◽  
Ash Layer ◽  
Tephra Layers ◽  
Major Oxide ◽  
Water Depths

Quaternary deposits in six sediment cores from the Scotia Sea, Antarctica, were examined for the presence of volcanic ash layers. The cores were recovered from water depths of 3369-4025 m. Altogether, 23 ash layers were found, 18 of which have been investigated by electron-probe microanalysis. Deception Island is identified as the source of all the ash layers analyzed. The upper ash layer in each core can be correlated across all six cores, over a distance of -100 km, on the basis of its unusual bimodal composition, major oxide geochemistry and stratigraphie position. Two other ash layers can also be correlated between several of the cores.

Direct in situ detection of cells in deep-sea sediment cores from the Peru Margin (ODP Leg 201, Site 1229)

Geobiology ◽  
2004 ◽  
Vol 2 (4) ◽  
pp. 217-223 ◽  
Author(s):  
L. MAUCLAIRE ◽  
K. ZEPP ◽  
P. MEISTER ◽  
J. MCKENZIE
Keyword(s):  
Deep Sea ◽  
Sediment Cores ◽  
Deep Sea Sediment ◽  
In Situ Detection

Initial Deep-Sea Sediment Deformation at the Base of the Washington Continental Slope: A Response to Subduction

Geology ◽  
1974 ◽  
Vol 2 (11) ◽  
pp. 561 ◽  
Author(s):  
Bobb Carson ◽  
Jennwei Yuan ◽  
Paul B. Myers ◽  
William D. Barnard
Keyword(s):  
Continental Slope ◽  
Deep Sea ◽  
Deep Sea Sediment ◽  
Sediment Deformation

scholarly journals Reconstructing 7000 years of North Atlantic hurricane variability using deep-sea sediment cores from the western Great Bahama Bank

2013 ◽  
Vol 28 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Michael R. Toomey ◽  
William B. Curry ◽  
Jeffrey P. Donnelly ◽  
Peter J. van Hengstum
Keyword(s):  
North Atlantic ◽  
Deep Sea ◽  
Sediment Cores ◽  
Deep Sea Sediment ◽  
Great Bahama Bank ◽  
Atlantic Hurricane

AMS-14C Ages Measured in Deep Sea Cores from the Southern Ocean: Implications for Sedimentation Rates during Isotope Stage 2

1989 ◽  
Vol 31 (2) ◽  
pp. 309-317 ◽  
Author(s):  
Edouard Bard ◽  
Laurent Labeyrie ◽  
Maurice Arnold ◽  
Monique Labracherie ◽  
Jean-Jacques Pichon ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Sedimentation Rate ◽  
Deep Sea ◽  
Sediment Cores ◽  
Sea Surface ◽  
Sedimentation Rates ◽  
Deep Sea Sediment ◽  
The Difference ◽  
The Last Glacial Maximum ◽  
The Last Glacial

Abstract14C dates obtained by accelerator mass spectrometry (AMS) on monospecific foraminiferal samples from two deep-sea sediment cores raised in the Indian sector of the Southern Ocean have been corrected for the difference in 14C composition between atmosphere and sea surface by using a reconstruction of the latitudinal 14C gradient which existed in the Southern Ocean prior to 1962. The corrected AMS-14C data show a reduced sedimentation rate in core MD 84-527 between 25,000 and 10,000 yr BP. For core MD 84-551 the available data suggest that the sedimentation rate was higher during the Holocene than during the glacial period. These changes in sedimentation rates may be attributed to an increased opal dissolution during the last glacial maximum.

scholarly journals Detection of Odor Compounds in Deep-sea Sediment Cores from Sagami Bay and Izu-Bonin Trench using Gas Chromatography-olfactometry (GC-O)

2020 ◽  
Vol 30 (0) ◽  
pp. 94-99
Author(s):  
Misato MATSUMOTO ◽  
Hidetaka NOMAKI ◽  
Shinsuke KAWAGUCCI ◽  
Yuki KOGA ◽  
Taiki HIGUCHI ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Deep Sea ◽  
Sediment Cores ◽  
Sagami Bay ◽  
Deep Sea Sediment ◽  
Gas Chromatography Olfactometry ◽  
Odor Compounds
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