Sulphate reduction in oxic and sub-oxic North-East Atlantic sediments

N. S. Battersby; S. J. Malcolm; C. M. Brown; S. O. Stanley

Sulphate reduction in oxic and sub-oxic North-East Atlantic sediments

N. S. Battersby, S. J. Malcolm, C. M. Brown, S. O. Stanley

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Abstract

Oxic and sub-oxic N.-E. Atlantic sediments were examined for sulphate-reducing activity. Oxygen and/or nitrate reduction are probably the dominant mineralisation processes in the abyssal plain sediment studied. A low rate of sulphate reduction (0.1 nmol SO^2-₄ /ml/day) was recorded in the surface 5 cm of the continental slope sediment, together with the presence of a range of sulphate-reducing bacteria (SRB). A higher activity of sulphate reduction (2.2 nmol SO^2-₄ /ml/day) occurred in the continental shelf sediment which led to a small decrease in pore water sulphate and an increase in titration alkalinity. This sediment contained approx. 10²-10³ acetate, lactate and propionate oxidising SRB/ml. No low-M_r organic acids were detected in these sediments. However, amendment with 75 µM acetate stimulated sulphate-reducing activity in the shelf sediment. © 1985.

Original language	English
Pages (from-to)	225-228
Number of pages	4
Journal	FEMS Microbiology Letters
Volume	31
Issue number	4
Publication status	Published - Aug 1985

Keywords

low-M r organic acids
Malin Shelf
Porcupine Abyssal Plain
Rockall Trough
sulphate-reducing bacteria
titration alkalinity

Cite this

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title = "Sulphate reduction in oxic and sub-oxic North-East Atlantic sediments",

abstract = "Oxic and sub-oxic N.-E. Atlantic sediments were examined for sulphate-reducing activity. Oxygen and/or nitrate reduction are probably the dominant mineralisation processes in the abyssal plain sediment studied. A low rate of sulphate reduction (0.1 nmol SO2-4 /ml/day) was recorded in the surface 5 cm of the continental slope sediment, together with the presence of a range of sulphate-reducing bacteria (SRB). A higher activity of sulphate reduction (2.2 nmol SO2-4 /ml/day) occurred in the continental shelf sediment which led to a small decrease in pore water sulphate and an increase in titration alkalinity. This sediment contained approx. 102-103 acetate, lactate and propionate oxidising SRB/ml. No low-Mr organic acids were detected in these sediments. However, amendment with 75 µM acetate stimulated sulphate-reducing activity in the shelf sediment. {\textcopyright} 1985.",

keywords = "low-M r organic acids, Malin Shelf, Porcupine Abyssal Plain, Rockall Trough, sulphate-reducing bacteria, titration alkalinity",

author = "Battersby, {N. S.} and Malcolm, {S. J.} and Brown, {C. M.} and Stanley, {S. O.}",

year = "1985",

month = aug,

language = "English",

volume = "31",

pages = "225--228",

journal = "FEMS Microbiology Letters",

issn = "0378-1097",

publisher = "Wiley-Blackwell",

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TY - JOUR

T1 - Sulphate reduction in oxic and sub-oxic North-East Atlantic sediments

AU - Battersby, N. S.

AU - Malcolm, S. J.

AU - Brown, C. M.

AU - Stanley, S. O.

PY - 1985/8

Y1 - 1985/8

N2 - Oxic and sub-oxic N.-E. Atlantic sediments were examined for sulphate-reducing activity. Oxygen and/or nitrate reduction are probably the dominant mineralisation processes in the abyssal plain sediment studied. A low rate of sulphate reduction (0.1 nmol SO2-4 /ml/day) was recorded in the surface 5 cm of the continental slope sediment, together with the presence of a range of sulphate-reducing bacteria (SRB). A higher activity of sulphate reduction (2.2 nmol SO2-4 /ml/day) occurred in the continental shelf sediment which led to a small decrease in pore water sulphate and an increase in titration alkalinity. This sediment contained approx. 102-103 acetate, lactate and propionate oxidising SRB/ml. No low-Mr organic acids were detected in these sediments. However, amendment with 75 µM acetate stimulated sulphate-reducing activity in the shelf sediment. © 1985.

AB - Oxic and sub-oxic N.-E. Atlantic sediments were examined for sulphate-reducing activity. Oxygen and/or nitrate reduction are probably the dominant mineralisation processes in the abyssal plain sediment studied. A low rate of sulphate reduction (0.1 nmol SO2-4 /ml/day) was recorded in the surface 5 cm of the continental slope sediment, together with the presence of a range of sulphate-reducing bacteria (SRB). A higher activity of sulphate reduction (2.2 nmol SO2-4 /ml/day) occurred in the continental shelf sediment which led to a small decrease in pore water sulphate and an increase in titration alkalinity. This sediment contained approx. 102-103 acetate, lactate and propionate oxidising SRB/ml. No low-Mr organic acids were detected in these sediments. However, amendment with 75 µM acetate stimulated sulphate-reducing activity in the shelf sediment. © 1985.

KW - low-M r organic acids

KW - Malin Shelf

KW - Porcupine Abyssal Plain

KW - Rockall Trough

KW - sulphate-reducing bacteria

KW - titration alkalinity

UR - http://www.scopus.com/inward/record.url?scp=0001169760&partnerID=8YFLogxK

M3 - Article

SN - 0378-1097

VL - 31

SP - 225

EP - 228

JO - FEMS Microbiology Letters

JF - FEMS Microbiology Letters

IS - 4

ER -

Sulphate reduction in oxic and sub-oxic North-East Atlantic sediments

Abstract

Keywords

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