Contribution by different marine bacterial communities to particulate beam attenuation

A. Montes Hugo Martin; Hugh Ducklow; Oscar Schofield

doi:10.3354/meps07883

Contribution by different marine bacterial communities to particulate beam attenuation

A. Montes Hugo Martin, Hugh Ducklow, Oscar Schofield

SEBS-Marine & Coastal Sciences

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Contribution of heterotrophic marine bacteria (HB) to the particulate beam attenuation coefficient (cp) was estimated as a function of latitude in diverse marine regions. Calculations were based on surface measurements (0 to 20 m depth) of bacterial abundance and biovolume, physiooptical empirical relationships, and light scattering models. Relative contribution of spherical HB to cp (cHB/cp) was commonly below 10%, and slightly increased (̃3%) when bacterial shape was assumed to be cylindrical. HB accounted for a larger fraction of cp magnitude at lower latitudes because of the greater abundance of bacteria. HB explained about a third of cp spatial variability in Antarctic (Antarctic Polar Front, Ross Sea) and non-polar (equatorial Pacific Ocean, Arabian Sea) oceanic regions.

Original language	English (US)
Pages (from-to)	13-22
Number of pages	10
Journal	Marine Ecology Progress Series
Volume	379
DOIs	https://doi.org/10.3354/meps07883
State	Published - May 25 2009

All Science Journal Classification (ASJC) codes

Ecology, Evolution, Behavior and Systematics
Aquatic Science
Ecology

Keywords

Heterotrophic marine bacteria
Light scattering
Mie theory
Particulate beam attenuation coefficient
Polar environments

Access to Document

10.3354/meps07883

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title = "Contribution by different marine bacterial communities to particulate beam attenuation",

abstract = "Contribution of heterotrophic marine bacteria (HB) to the particulate beam attenuation coefficient (cp) was estimated as a function of latitude in diverse marine regions. Calculations were based on surface measurements (0 to 20 m depth) of bacterial abundance and biovolume, physiooptical empirical relationships, and light scattering models. Relative contribution of spherical HB to cp (cHB/cp) was commonly below 10%, and slightly increased {\~(}3%) when bacterial shape was assumed to be cylindrical. HB accounted for a larger fraction of cp magnitude at lower latitudes because of the greater abundance of bacteria. HB explained about a third of cp spatial variability in Antarctic (Antarctic Polar Front, Ross Sea) and non-polar (equatorial Pacific Ocean, Arabian Sea) oceanic regions.",

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T1 - Contribution by different marine bacterial communities to particulate beam attenuation

AU - Martin, A. Montes Hugo

AU - Ducklow, Hugh

AU - Schofield, Oscar

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N2 - Contribution of heterotrophic marine bacteria (HB) to the particulate beam attenuation coefficient (cp) was estimated as a function of latitude in diverse marine regions. Calculations were based on surface measurements (0 to 20 m depth) of bacterial abundance and biovolume, physiooptical empirical relationships, and light scattering models. Relative contribution of spherical HB to cp (cHB/cp) was commonly below 10%, and slightly increased (̃3%) when bacterial shape was assumed to be cylindrical. HB accounted for a larger fraction of cp magnitude at lower latitudes because of the greater abundance of bacteria. HB explained about a third of cp spatial variability in Antarctic (Antarctic Polar Front, Ross Sea) and non-polar (equatorial Pacific Ocean, Arabian Sea) oceanic regions.

AB - Contribution of heterotrophic marine bacteria (HB) to the particulate beam attenuation coefficient (cp) was estimated as a function of latitude in diverse marine regions. Calculations were based on surface measurements (0 to 20 m depth) of bacterial abundance and biovolume, physiooptical empirical relationships, and light scattering models. Relative contribution of spherical HB to cp (cHB/cp) was commonly below 10%, and slightly increased (̃3%) when bacterial shape was assumed to be cylindrical. HB accounted for a larger fraction of cp magnitude at lower latitudes because of the greater abundance of bacteria. HB explained about a third of cp spatial variability in Antarctic (Antarctic Polar Front, Ross Sea) and non-polar (equatorial Pacific Ocean, Arabian Sea) oceanic regions.

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KW - Mie theory

KW - Particulate beam attenuation coefficient

KW - Polar environments

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