Linking Arenicola marina irrigation behaviour to oxygen transport and dynamics in sandy sediments

Karen Timmermann, Gary Thomas Banta, Ronnie N. Glud

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Udgivelsesdato: nov.
OriginalsprogEngelsk
TidsskriftJournal of Marine Research
Vol/bind64
Udgave nummer6
Sider (fra-til)915-938
Antal sider24
ISSN0022-2402
DOI
StatusUdgivet - 2006

Emneord

  • sandorm
  • ilt dynamik

Citer dette

@article{dc0221f0c0c111dbbab2000ea68e967b,
title = "Linking Arenicola marina irrigation behaviour to oxygen transport and dynamics in sandy sediments",
abstract = "In this study we examine how the irrigation behavior of the common lugworm Arenicola marina affects the distribution, transport and dynamics of oxygen in sediments using microelectrodes, planar optodes and diagenetic modeling. The irrigation pattern was characterized by a regular recurring periods of active irrigation lasting approximately 15 min separated by a 15 min rest period. The mean pumping rate during irrigation was 52 ml h-1. Oxygen dynamics and distribution around the tail shaft was closely related to irrigation pattern but independent of pumping rate. During irrigation the oxygen concentration in the burrow was high (80{\%} air saturation) and oxygen was detected at distances up to 0.7 mm from the burrow wall. Volume specific oxygen consumption rates calculated from measured oxygen profiles were up to 4 times higher for sediments surrounding worm burrows as compared to surface sediments. Model results indicated that oxygen consumption also was higher in the feeding pocket/funnel compared to the activity in surface sediments. An oxygen budget revealed that 49{\%} of the oxygen pumped into the burrow during lugworm irrigation was consumed by the worm itself while 23{\%} supported the diffusive mediated oxygen uptake of the burrow wall. Approximately 28{\%} of the oxygen was consumed by the feeding pocket/funnel characterized by advective porewater transport. Model simulations indicated that oxygen injected into the sediment was usually consumed in a very narrow zone around the feeding pocket and only in rare situations with very high pumping rates (>200 ml h-1) and/or a narrow feeding funnel (<5 cm2) was oxygen advected back to the overlying water.",
keywords = "sandorm, ilt dynamik, lugworm, bioturbation, oxygen dynamics, sediment",
author = "Karen Timmermann and Banta, {Gary Thomas} and Glud, {Ronnie N.}",
year = "2006",
doi = "10.1357/002224006779698378",
language = "English",
volume = "64",
pages = "915--938",
journal = "Journal of Marine Research",
issn = "0022-2402",
publisher = "Sears Foundation for Marine Research",
number = "6",

}

Linking Arenicola marina irrigation behaviour to oxygen transport and dynamics in sandy sediments. / Timmermann, Karen; Banta, Gary Thomas; Glud, Ronnie N.

I: Journal of Marine Research, Bind 64, Nr. 6, 2006, s. 915-938.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Linking Arenicola marina irrigation behaviour to oxygen transport and dynamics in sandy sediments

AU - Timmermann, Karen

AU - Banta, Gary Thomas

AU - Glud, Ronnie N.

PY - 2006

Y1 - 2006

N2 - In this study we examine how the irrigation behavior of the common lugworm Arenicola marina affects the distribution, transport and dynamics of oxygen in sediments using microelectrodes, planar optodes and diagenetic modeling. The irrigation pattern was characterized by a regular recurring periods of active irrigation lasting approximately 15 min separated by a 15 min rest period. The mean pumping rate during irrigation was 52 ml h-1. Oxygen dynamics and distribution around the tail shaft was closely related to irrigation pattern but independent of pumping rate. During irrigation the oxygen concentration in the burrow was high (80% air saturation) and oxygen was detected at distances up to 0.7 mm from the burrow wall. Volume specific oxygen consumption rates calculated from measured oxygen profiles were up to 4 times higher for sediments surrounding worm burrows as compared to surface sediments. Model results indicated that oxygen consumption also was higher in the feeding pocket/funnel compared to the activity in surface sediments. An oxygen budget revealed that 49% of the oxygen pumped into the burrow during lugworm irrigation was consumed by the worm itself while 23% supported the diffusive mediated oxygen uptake of the burrow wall. Approximately 28% of the oxygen was consumed by the feeding pocket/funnel characterized by advective porewater transport. Model simulations indicated that oxygen injected into the sediment was usually consumed in a very narrow zone around the feeding pocket and only in rare situations with very high pumping rates (>200 ml h-1) and/or a narrow feeding funnel (<5 cm2) was oxygen advected back to the overlying water.

AB - In this study we examine how the irrigation behavior of the common lugworm Arenicola marina affects the distribution, transport and dynamics of oxygen in sediments using microelectrodes, planar optodes and diagenetic modeling. The irrigation pattern was characterized by a regular recurring periods of active irrigation lasting approximately 15 min separated by a 15 min rest period. The mean pumping rate during irrigation was 52 ml h-1. Oxygen dynamics and distribution around the tail shaft was closely related to irrigation pattern but independent of pumping rate. During irrigation the oxygen concentration in the burrow was high (80% air saturation) and oxygen was detected at distances up to 0.7 mm from the burrow wall. Volume specific oxygen consumption rates calculated from measured oxygen profiles were up to 4 times higher for sediments surrounding worm burrows as compared to surface sediments. Model results indicated that oxygen consumption also was higher in the feeding pocket/funnel compared to the activity in surface sediments. An oxygen budget revealed that 49% of the oxygen pumped into the burrow during lugworm irrigation was consumed by the worm itself while 23% supported the diffusive mediated oxygen uptake of the burrow wall. Approximately 28% of the oxygen was consumed by the feeding pocket/funnel characterized by advective porewater transport. Model simulations indicated that oxygen injected into the sediment was usually consumed in a very narrow zone around the feeding pocket and only in rare situations with very high pumping rates (>200 ml h-1) and/or a narrow feeding funnel (<5 cm2) was oxygen advected back to the overlying water.

KW - sandorm

KW - ilt dynamik

KW - lugworm

KW - bioturbation

KW - oxygen dynamics

KW - sediment

U2 - 10.1357/002224006779698378

DO - 10.1357/002224006779698378

M3 - Journal article

VL - 64

SP - 915

EP - 938

JO - Journal of Marine Research

JF - Journal of Marine Research

SN - 0022-2402

IS - 6

ER -