Particle size, light scattering and composition of suspended particulate matter in the North Atlantic

In order to clarify the origin and behavior of suspended particulate matter (SPM) in a tidal river, variation of SPM in a tidal river was investigated with regard to its size and constituents. SPM was separated into three groups according to size. Change of contents of titanium and organic substances of each group of SPM was examined. SPM which was discharged by run-off was transported with decomposition and sedimentation in a tidal river. Concentration of SPM with a particle size greater than 0.45 μm increased due to resuspension in a tidal river. Origin of SPM with a size of less than 0.45 μm at upstream areas was from natural soil and most of such SPM which had been transported settled near a river mouth. It was determined from examination of the CN ratio and the ratio of the number of attached bacteria to free bacteria that SPM with a size greater than 1.0 μm at upstream areas was decomposing intensively. At the downstream areas, SPM with a size of less than 0.45 μm came from the sea. SPM with particle size greater than 1.0 μm consisted of plankton and substances which were decomposed sufficiently while flowing.

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Elementary composition of suspended particulate matter in the North Sea

Netherlands Journal of Sea Research ◽

10.1016/0077-7579(88)90026-9 ◽

1988 ◽

Vol 22 (3) ◽

pp. 219-236 ◽

Cited By ~ 38

Author(s):

R.F. Nolting ◽

D. Eisma

Keyword(s):

Particulate Matter ◽

North Sea ◽

Suspended Particulate Matter ◽

Elementary Composition ◽

The North ◽

Suspended Particulate ◽

The North Sea

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Effects of Water Particles in the Jinjiang River Estuary on the Physiological and Biochemical Characteristics of Microcystit Flos-Aquae

10.21203/rs.3.rs-557128/v1 ◽

2021 ◽

Author(s):

Yiting Nan ◽

Peiyong Guo ◽

Hui Xing ◽

Sijia Chen ◽

Bo Hu ◽

...

Keyword(s):

Particle Size ◽

Particulate Matter ◽

Protein Content ◽

Suspended Particulate Matter ◽

Soluble Protein ◽

Suspended Particles ◽

Dose Effect ◽

Soluble Protein Content ◽

Sod Activity ◽

Suspended Particulate

Abstract The effects of different concentrations (100,150,200,250 mg/L) and different particle sizes (0–75µm, 75–120µm, 120–150µm, 150–500µm) on soluble protein content, SOD and CAT activity, MDA content, chlorophyll a content and photosynthetic parameters of Microcystis flos-aquae were studied, the mechanism of the effect of suspended particulate matter on the physiology and biochemistry of Microcystis flos-aquae was discussed. The results showed that the soluble protein content of Microcystis flos-aquae did not change obviously after being stressed by suspended particles of different concentration/diameter. The SOD activity of Microcystis flos-aquae increased at first and then decreased with the increase of the concentration of suspended particulate matter. The SOD activity of Microcystis flos-aquae reached 28.03 U/mL when the concentration of suspended particulate matter was 100 mg/L. The CAT activity of Microcystis flos-aquae increased with the increase of the concentration of suspended particles, and reached the maximum value of 12.45 U/mgprot in the concentration group of 250 mg/L, showing a certain dose-effect. The effect of small particle size on SOD, CAT and MDA of Microcystis flos-aquae was more significant than that of large particle size. The larger the concentration and the smaller the particle size, the stronger the attenuation of light and the lower the content of chlorophyll a. Both Fv/Fm and Fv/F0 of Microcystis flos-aquae increased at first and then decreased under different concentration/size of suspended particles. The relative electron transfer rate gradually returned to the normal level with the passage of time. There was no significant difference in α value between treatment group and control group, ETRmax and Ik decreased.

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Creation of High Resolution Suspended Particulate Matter Data in the North Sea From Sentinel-2 and Sentinel-3 Data

10.1109/igarss47720.2021.9554197 ◽

2021 ◽

Author(s):

A. Alvera-Azcarate ◽

A. Barth ◽

C. Troupin ◽

J.-M. Beckers ◽

D. Van Der Zande

Keyword(s):

Particulate Matter ◽

High Resolution ◽

North Sea ◽

Suspended Particulate Matter ◽

The North ◽

Suspended Particulate ◽

The North Sea ◽

Sentinel 2

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Association of Marine Archaea with the Digestive Tracts of Two Marine Fish Species

Applied and Environmental Microbiology ◽

10.1128/aem.64.8.2894-2898.1998 ◽

1998 ◽

Vol 64 (8) ◽

pp. 2894-2898 ◽

Cited By ~ 65

Author(s):

Marc J. E. C. van der Maarel ◽

Rebekka R. E. Artz ◽

René Haanstra ◽

Larry J. Forney

Keyword(s):

Particulate Matter ◽

North Sea ◽

Suspended Particulate Matter ◽

Archaeal Community ◽

Grey Mullet ◽

The North ◽

Suspended Particulate ◽

The North Sea ◽

Group Ii ◽

Marine Archaea

ABSTRACT Recent studies have shown that archaea which were always thought to live under strict anoxic or extreme environmental conditions are also present in cold, oxygenated seawater, soils, the digestive tract of a holothurian deep-sea-deposit feeder, and a marine sponge. In this study, we show, by using PCR-mediated screening in other marine eukaryotes, that marine archaea are also present in the digestive tracts of flounder and grey mullet, two fish species common in the North Sea, in fecal samples of flounder, and in suspended particulate matter of the North Sea water column. No marine archaea could be detected in the digestive tracts of mussels or the fecal pellets of a copepod species. The archaeal 16S ribosomal DNA clone libraries of feces of flounder and the contents of the digestive tracts of grey mullet and flounder were dominated by group II marine archaea. The marine archaeal clones derived from flounder and grey mullet digestive tracts and feces formed a distinct cluster within the group II marine archaea, with 76.7 to 89.8% similarity to previously described group II clones. Fingerprinting of the archaeal community of flounder digestive tract contents and feces by terminal restriction fragment length polymorphism of archaeal 16S rRNA genes after restriction withHhaI showed a dominant fragment at 249 bp, which is likely to be derived from group II marine archaea. Clones of marine archaea that were closely related to the fish-associated marine archaea clones were obtained from suspended particulate matter of the water column at two stations in the North Sea. Terminal restriction fragment length polymorphism fingerprinting of the archaeal community present in suspended particulate matter showed the same fragment pattern as was found for the archaeal community of the flounder digestive tract contents and feces. These data demonstrate that marine archaea are present in the digestive tracts and feces of very common marine fish. It is possible that the marine archaea associated with the digestive tracts of marine fish are liberated into the water column through the feces and subsequently contribute to the marine archaeal community of suspended particulate matter.

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Fatty Acids in Surface Particulate Matter From the North Atlantic

Journal of the Fisheries Research Board of Canada ◽

10.1139/f72-230 ◽

1972 ◽

Vol 29 (10) ◽

pp. 1482-1486 ◽

Cited By ~ 27

Author(s):

David M. Schultz ◽

James G. Quinn

Keyword(s):

Particulate Matter ◽

Fatty Acid ◽

North Atlantic ◽

Fatty Acid Distribution ◽

The North ◽

Polyunsaturated Acids ◽

Carbon Acids ◽

The North Atlantic ◽

Branched Chain ◽

Long Chain

The fatty acid composition of particulate matter from surface waters in the North Atlantic has been investigated. A high proportion is long-chain polyunsaturated acids, typical of a marine origin. The low relative abundance of iso and anteiso 15-carbon acids indicates little bacterial contribution to the particulate matter. This fatty acid distribution is in contrast to that found in estuarine particulate matter, which contains only trace amounts of the long-chain polyunsaturated acids and substantial quantities of branched chain acids.

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