Marine meiofauna, carbon and nitrogen mineralization in sandy and soft sediments of Disko Bay, West Greenland

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Marine meiofauna, carbon and nitrogen mineralization in sandy and soft sediments of Disko Bay, West Greenland. / Rysgaard, S.; Christensen, P.B.; Sørensen, Martin Vinther; Funch, P.; Berg, P.

In: Aquatic Microbial Ecology, Vol. 21, No. 1, 2000, p. 59-71.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Rysgaard, S, Christensen, PB, Sørensen, MV, Funch, P & Berg, P 2000, 'Marine meiofauna, carbon and nitrogen mineralization in sandy and soft sediments of Disko Bay, West Greenland', Aquatic Microbial Ecology, vol. 21, no. 1, pp. 59-71.

APA

Rysgaard, S., Christensen, P. B., Sørensen, M. V., Funch, P., & Berg, P. (2000). Marine meiofauna, carbon and nitrogen mineralization in sandy and soft sediments of Disko Bay, West Greenland. Aquatic Microbial Ecology, 21(1), 59-71.

CBE

Rysgaard S, Christensen PB, Sørensen MV, Funch P, Berg P. 2000. Marine meiofauna, carbon and nitrogen mineralization in sandy and soft sediments of Disko Bay, West Greenland. Aquatic Microbial Ecology. 21(1):59-71.

MLA

Vancouver

Rysgaard S, Christensen PB, Sørensen MV, Funch P, Berg P. Marine meiofauna, carbon and nitrogen mineralization in sandy and soft sediments of Disko Bay, West Greenland. Aquatic Microbial Ecology. 2000;21(1):59-71.

Author

Rysgaard, S. ; Christensen, P.B. ; Sørensen, Martin Vinther ; Funch, P. ; Berg, P. / Marine meiofauna, carbon and nitrogen mineralization in sandy and soft sediments of Disko Bay, West Greenland. In: Aquatic Microbial Ecology. 2000 ; Vol. 21, No. 1. pp. 59-71.

Bibtex

@article{df9222b0374d11df9806000ea68e967b,
title = "Marine meiofauna, carbon and nitrogen mineralization in sandy and soft sediments of Disko Bay, West Greenland",
abstract = "Organic carbon mineralization was studied in a shallow-water (4 m), sandy sediment and 2 comparatively deep-water (150 and 300 m), soft sediments in Disko Bay, West Greenland. Benthic microalgae inhabiting the shallow-water locality significantly affected diurnal O-2 conditions within the surface layers of the sediment. Algal photosynthetic activity and nitrogen uptake reduced nitrogen effluxes and denitrification rates. Sulfate reduction was the most important pathway for carbon mineralization in the sediments of the shallow-water station. In contrast, high bottom-water NO3- concentrations and a relatively deep O-2 penetration into the sediment at the deep-water stations ensured high denitrification activity, particularly as a result of an efficient coupling between nitrification and denitrification. Denitrification accounted for up to 33 {\%} of total carbon mineralization in the deep-water sediment and was, together with organotrophic O-2 respiration, the most important pathway for carbon mineralization within these sediments. The obtained process rates were comparable to mineralization rates from much warmer localities, suggesting that benthic mineralization in arctic marine environments is regulated primarily by the availability of organic matter and not by temperature. The shallow-water sediment contained a larger meiofauna population than the deep-water muddy sediments. Crustacean nauplia dominated the upper 9 mm while nematodes dominated below. A typical interstitial fauna of species belonging to Platyhelminthes, Rotifera, Gastrotricha, and Protodriloidae (Polychaeta) occurred only at the sandy locality, whereas Kinorhyncha, Foraminifera, and Cumacea (Crustacea) occurred only at the muddy stations. The larger number of meiofauna individuals at the sandy locality may in part be explained by higher food availability, as living diatoms served as food for the meiofauna. Based on interpretation of the vertical O-2 concentration profiles compared with intact-core Oz flux measurements, it was shown that the bioturbation coefficient was approximately 3 times higher in the sandy sediment, corresponding to the 3 times higher number of meiofauna found in the upper 2 cm of this sediment. Thus, meiofauna increased the transport of solutes as compared to molecular diffusion by a factor of 1.5 to 3.1, thereby stimulating microbial mineralization",
keywords = "Bioturbation, Arktis, Meiofauna, Rundorme, Krebsdyr, Fladorme, Hjuldyr, Bioturbation, Arctic, Meiofauna, Nematoder, Crustacea, flatworms, Rotifera, microbial mineralization",
author = "S. Rysgaard and P.B. Christensen and S{\o}rensen, {Martin Vinther} and P. Funch and P. Berg",
year = "2000",
language = "English",
volume = "21",
pages = "59--71",
journal = "Aquatic Microbial Ecology",
issn = "0948-3055",
publisher = "Inter-Research",
number = "1",

}

RIS

TY - JOUR

T1 - Marine meiofauna, carbon and nitrogen mineralization in sandy and soft sediments of Disko Bay, West Greenland

AU - Rysgaard, S.

AU - Christensen, P.B.

AU - Sørensen, Martin Vinther

AU - Funch, P.

AU - Berg, P.

PY - 2000

Y1 - 2000

N2 - Organic carbon mineralization was studied in a shallow-water (4 m), sandy sediment and 2 comparatively deep-water (150 and 300 m), soft sediments in Disko Bay, West Greenland. Benthic microalgae inhabiting the shallow-water locality significantly affected diurnal O-2 conditions within the surface layers of the sediment. Algal photosynthetic activity and nitrogen uptake reduced nitrogen effluxes and denitrification rates. Sulfate reduction was the most important pathway for carbon mineralization in the sediments of the shallow-water station. In contrast, high bottom-water NO3- concentrations and a relatively deep O-2 penetration into the sediment at the deep-water stations ensured high denitrification activity, particularly as a result of an efficient coupling between nitrification and denitrification. Denitrification accounted for up to 33 % of total carbon mineralization in the deep-water sediment and was, together with organotrophic O-2 respiration, the most important pathway for carbon mineralization within these sediments. The obtained process rates were comparable to mineralization rates from much warmer localities, suggesting that benthic mineralization in arctic marine environments is regulated primarily by the availability of organic matter and not by temperature. The shallow-water sediment contained a larger meiofauna population than the deep-water muddy sediments. Crustacean nauplia dominated the upper 9 mm while nematodes dominated below. A typical interstitial fauna of species belonging to Platyhelminthes, Rotifera, Gastrotricha, and Protodriloidae (Polychaeta) occurred only at the sandy locality, whereas Kinorhyncha, Foraminifera, and Cumacea (Crustacea) occurred only at the muddy stations. The larger number of meiofauna individuals at the sandy locality may in part be explained by higher food availability, as living diatoms served as food for the meiofauna. Based on interpretation of the vertical O-2 concentration profiles compared with intact-core Oz flux measurements, it was shown that the bioturbation coefficient was approximately 3 times higher in the sandy sediment, corresponding to the 3 times higher number of meiofauna found in the upper 2 cm of this sediment. Thus, meiofauna increased the transport of solutes as compared to molecular diffusion by a factor of 1.5 to 3.1, thereby stimulating microbial mineralization

AB - Organic carbon mineralization was studied in a shallow-water (4 m), sandy sediment and 2 comparatively deep-water (150 and 300 m), soft sediments in Disko Bay, West Greenland. Benthic microalgae inhabiting the shallow-water locality significantly affected diurnal O-2 conditions within the surface layers of the sediment. Algal photosynthetic activity and nitrogen uptake reduced nitrogen effluxes and denitrification rates. Sulfate reduction was the most important pathway for carbon mineralization in the sediments of the shallow-water station. In contrast, high bottom-water NO3- concentrations and a relatively deep O-2 penetration into the sediment at the deep-water stations ensured high denitrification activity, particularly as a result of an efficient coupling between nitrification and denitrification. Denitrification accounted for up to 33 % of total carbon mineralization in the deep-water sediment and was, together with organotrophic O-2 respiration, the most important pathway for carbon mineralization within these sediments. The obtained process rates were comparable to mineralization rates from much warmer localities, suggesting that benthic mineralization in arctic marine environments is regulated primarily by the availability of organic matter and not by temperature. The shallow-water sediment contained a larger meiofauna population than the deep-water muddy sediments. Crustacean nauplia dominated the upper 9 mm while nematodes dominated below. A typical interstitial fauna of species belonging to Platyhelminthes, Rotifera, Gastrotricha, and Protodriloidae (Polychaeta) occurred only at the sandy locality, whereas Kinorhyncha, Foraminifera, and Cumacea (Crustacea) occurred only at the muddy stations. The larger number of meiofauna individuals at the sandy locality may in part be explained by higher food availability, as living diatoms served as food for the meiofauna. Based on interpretation of the vertical O-2 concentration profiles compared with intact-core Oz flux measurements, it was shown that the bioturbation coefficient was approximately 3 times higher in the sandy sediment, corresponding to the 3 times higher number of meiofauna found in the upper 2 cm of this sediment. Thus, meiofauna increased the transport of solutes as compared to molecular diffusion by a factor of 1.5 to 3.1, thereby stimulating microbial mineralization

KW - Bioturbation

KW - Arktis

KW - Meiofauna

KW - Rundorme

KW - Krebsdyr

KW - Fladorme

KW - Hjuldyr

KW - Bioturbation

KW - Arctic

KW - Meiofauna

KW - Nematoder

KW - Crustacea

KW - flatworms

KW - Rotifera

KW - microbial mineralization

M3 - Journal article

VL - 21

SP - 59

EP - 71

JO - Aquatic Microbial Ecology

JF - Aquatic Microbial Ecology

SN - 0948-3055

IS - 1

ER -