Grain-size composition of the suspended particulate matter in the marginal filter of the Severnaya Dvina River

Кравчишина, М. Д.; Lisitzyn, A. P.

doi:10.1134/s0001437011010097

Cited by 14 publications

(7 citation statements)

References 12 publications

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“…The distribution of particulate matter and C P in the mixing zone of the riverine and marine waters is characterized by a drastic decrease in the river → sea direction. POC content decreased by a factor of 2-8 under the water mixing and the POC fraction in particulate matter increased (to 5.5% at stations 5 and 6), which represents qualitative changes in PM composition at the geochemical barrier [3]. The C P supply to the waters of the Cai River estuary resulting from the processes of primary production is minor, as shown by the pronounced decrease of chl a concentration (to 0.8 mg/m 3 at station 6, Table 1).…”

Section: Resultsmentioning

confidence: 91%

“…The GF/F filters were dried in a desiccator at 60°C. To collect the particulate matter and to deter mine its mass concentration mg/L, the membrane nuclear filters of 47 mm diameter and 0.45 μm pore size were used [3]. Bottom sediments were collected with a sampler; after the lithological description, the samples were dried in a desiccator at 60°C [7,8].…”

Section: Methodsmentioning

confidence: 99%

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Dissolved, particulate, and sedimentary organic matter in the Cai River basin (Nha Trang Bay of the South China Sea)

et al. 2015

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The data were obtained on the content of organic carbon in the water, particulate matter, and bot tom sediments of the Cai River and its tributaries (the basin of Nha Trang Bay). The surface waters of the con sidered basin contained OM mainly in a dissolved form (DOC/POC = 3). The fraction of C org in particulate matter amounted to 4.9% on average. Based on the analysis of n alkanes in bottom sediments, three OM types-autochthonous, mixed, and mainly terrigenous genesis-were distinguished. These types are alter nated in series in the lengthwise profile of the river. All the OM types are in close relation to the peculiarities of sedimentation and hydrodynamics of the waters in the treated aquatic area. The geochemical indices (Pr/Ph, , and CPI values) represent the influence of oxidative conditions on OM formation and the intense microbiological transformation of its autochthonous component.

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Section: Resultsmentioning

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Dissolved, particulate, and sedimentary organic matter in the Cai River basin (Nha Trang Bay of the South China Sea)

et al. 2015

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“…Lithogenic silica (coming from the weathering of minerals such as clays, silts and sand) can also represent a large fraction of the total silicon in rivers (Huang et al ., 2019). The particle size from such processes is however in the micrometer scale (Kravchishina et al ., 2011; Le Meur et al ., 2016), much larger than the particles detected here (Castellón et al ., 2013). Additionally, Río Buenavista was transparent and devoid of apparent particulate material.…”

Section: Discussionmentioning

confidence: 99%

Out of the blue: the independent activity of sulfur-oxidizers and diatoms mediate the sudden color shift of a tropical river

Arce-Rodríguez

Libby

Castellón

et al. 2022

Preprint

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Rio Celeste ("Sky-Blue River") is a river located in the Tenorio National Park (Costa Rica) that has become an important hotspot for eco-tourism due to its striking sky-blue color. A previous study suggested that this color is not caused by dissolved chemical species, but by precipitation of light-scattering aluminosilicate particles at the mixing point of two colorless streams, the acidic Quebrada Agria and the neutral Rio Buenavista. We now present microbiological information on Rio Celeste and its two tributaries, as well as a more detailed characterization of the particles that occur at the mixing point. Our results overturn the previous belief that the light scattering particles are formed by the aggregation of smaller particles coming from Rio Buenavista, and rather point to chemical formation of hydroxyaluminosilicate colloids with Quebrada Agria as the main contributor to the phenomenon, with Rio Buenavista acting as a secondary source of silica to the reaction. We also show how the sky-blue color of Rio Celeste arises from the tight interaction between chemical and biological processes. Sulfur-oxidizing bacteria generate an acidic environment in Quebrada Agria, which in turn cause dissolution and mobilization of aluminum and other metals, while in Rio Buenavista the growth of diatoms transforms dissolved silicon into colloidal biogenic forms. The local interaction between these two well-known biological activities gives rise to the unique Rio Celeste phenomenon, in what constitutes a textbook example of emergent behavior in environmental microbiology.

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“…Particles do not pass the full mechanical (according to specific weight) and biological separation in the water body. The high content of pelitic fraction clearly marks the pathways of transformed river waters of the Northern Dvina (Kravchishina and Lisitzin 2011).…”

Section: Grain Size Distributionmentioning

confidence: 96%

“…The content of terrigenous particles decreases with distance from the river mouths, although remains quite high (Kravchishina and Lisitzin 2011). Comparison of the SPM concentrations by volume (0.5-5 mm 3 /L) with the amount of phytoplankton (0.12-3.65 mm 3 /L) has shown the following fractions of phytoplankton in the SPM in different regions of the sea: 27% in the vertex of Dvina Bay, 40% in the basin, and 65% in Kandalaksha Bay (Ilyash et al 2011).…”

Section: Biogenic Particles and Ommentioning

confidence: 98%

Suspended particulate matter in the White Sea: the results of long-term interdisciplinary research

et al. 2015

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The spatial and temporal variations in SPM concentration in the White Sea, Russia, are directly (mineral particles from the water basin) or indirectly ("blossom" of diatoms due to supply of nutrients) caused by river runoff. Interannual variations in SPM concentration for the White Sea are low and do not exceed 18% (2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010); hence, they are statistically insignificant.

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Grain-size composition of the suspended particulate matter in the marginal filter of the Severnaya Dvina River

Cited by 14 publications

References 12 publications

Dissolved, particulate, and sedimentary organic matter in the Cai River basin (Nha Trang Bay of the South China Sea)

Dissolved, particulate, and sedimentary organic matter in the Cai River basin (Nha Trang Bay of the South China Sea)

Out of the blue: the independent activity of sulfur-oxidizers and diatoms mediate the sudden color shift of a tropical river

Suspended particulate matter in the White Sea: the results of long-term interdisciplinary research

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