A relationship between accumulation of heavy metals and microbiological parameters in the surface microlayer and subsurface water of a coastal Baltic lake

Hydrobiologia ◽  
2015 ◽  
Vol 762 (1) ◽  
pp. 65-80 ◽  
Author(s):  
Józef Piotr Antonowicz ◽  
Zbigniew Mudryk ◽  
Marta Zdanowicz
Keyword(s):  
Heavy Metals ◽  
Subsurface Water ◽  
Surface Microlayer ◽  
Microbiological Parameters

scholarly journals Spatio-temporal variation in number and production of neustonic and planktonic bacteria inhabiting polluted estuarine harbour channel

2021 ◽  
Vol 203 (9) ◽  
pp. 5547-5559
Author(s):  
Piotr Perliński ◽  
Zbigniew J. Mudryk ◽  
Marta Zdanowicz ◽  
Łukasz Kubera
Keyword(s):  
Seasonal Variation ◽  
Secondary Production ◽  
Seasonal Cycle ◽  
Subsurface Water ◽  
Surface Microlayer ◽  
Water Basin ◽  
Planktonic Bacteria ◽  
Microbiological Parameters ◽  
Spatio Temporal ◽  
Number Of Bacteria

AbstractThe aim of this paper was to determine the abundance and secondary production by bacteria inhabiting the surface microlayer and subsurface water in a specific water basin, i.e., polluted estuarine harbour channel. In a 3-year seasonal cycle, the total number of bacteria and their biomass were higher in the surface microlayer (SML) 7.57 × 108cells dm−3 and 15.86 µg C dm−3 than in the subsurface water (SSW) 4.25 × 108cells dm−3 and 9.11 µg C dm−3 of the studied channel. The opposite relationship was noted in the level of the secondary production (SML—37.16 μg C dm−3 h−1, SSW—60.26 μg C dm−3 h−1) in this water basin. According to the analysed microbiological parameters, the total number of bacteria and secondary production varied along the horizontal profile in the water of the studied channel. The total number of bacteria and their secondary production showed the seasonal variation as well.

Sampling and analysis of the air-water interface with SEM and EDS of microlayers

1989 ◽  
Vol 47 ◽  
pp. 1004-1005
Author(s):  
Randall W. Smith ◽  
John Dash
Keyword(s):  
Heavy Metals ◽  
Surface Microlayer ◽  
Surface Films ◽  
Water Interface ◽  
Physical Processes ◽  
Infrared Spectroscopic Analysis ◽  
Eds Analysis ◽  
Air Water Interface ◽  
Significant Area ◽  
Bulk Chemical

The structure of the air-water interface forms a boundary layer that involves biological ,chemical geological and physical processes in its formation. Freshwater and sea surface microlayers form at the air-water interface and include a diverse assemblage of organic matter, detritus, microorganisms, plankton and heavy metals. The sampling of microlayers and the examination of components is presently a significant area of study because of the input of anthropogenic materials and their accumulation at the air-water interface. The neustonic organisms present in this environment may be sensitive to the toxic components of these inputs. Hardy reports that over 20 different methods have been developed for sampling of microlayers, primarily for bulk chemical analysis. We report here the examination of microlayer films for the documentation of structure and composition.Baier and Gucinski reported the use of Langmuir-Blogett films obtained on germanium prisms for infrared spectroscopic analysis (IR-ATR) of components. The sampling of microlayers has been done by collecting fi1ms on glass plates and teflon drums, We found that microlayers could be collected on 11 mm glass cover slips by pulling a Langmuir-Blogett film from a surface microlayer. Comparative collections were made on methylcel1ulose filter pads. The films could be air-dried or preserved in Lugol's Iodine Several slicks or surface films were sampled in September, 1987 in Chesapeake Bay, Maryland and in August, 1988 in Sequim Bay, Washington, For glass coverslips the films were air-dried, mounted on SEM pegs, ringed with colloidal silver, and sputter coated with Au-Pd, The Langmuir-Blogett film technique maintained the structure of the microlayer intact for examination, SEM observation and EDS analysis were then used to determine organisms and relative concentrations of heavy metals, using a Link AN 10000 EDS system with an ISI SS40 SEM unit. Typical heavy microlayer films are shown in Figure 3.

Comparison of the water quality of the surface microlayer and subsurface water in the Guangzhou segment of the Pearl River, China

2014 ◽  
Vol 24 (3) ◽  
pp. 475-491 ◽  
Author(s):  
Qing Liu ◽  
Xiaojuan Hu ◽  
Jiangluan Jiang ◽  
Junyi Zhang ◽  
Zhihui Wu ◽  
...  
Keyword(s):  
Water Quality ◽  
Subsurface Water ◽  
Pearl River ◽  
Surface Microlayer ◽  
The Pearl River

Microbiological and chemical enrichment of freshwater-surface microlayers relative to the bulk-subsurface water

1974 ◽  
Vol 20 (7) ◽  
pp. 1051-1057 ◽  
Author(s):  
Roger F. Hatcher ◽  
Bruce C. Parker
Keyword(s):  
Ammonium Nitrate ◽  
Subsurface Water ◽  
Surface Microlayer ◽  
Ecological Functions ◽  
Chemical Enrichment

Concentrations of bacteria, fungi, ammonium, nitrate, nitrite, orthophosphate, sulfate, and certain metals were enriched in freshwater-surface microlayer samples relative to the bulk-subsurface water. Results differed markedly depending on which of three methods for surface-microlayer collection was used. This report suggests that the biologically and chemically rich freshwater-surface microlayers contribute to ecological functions and interactions between subsurface water and the atmosphere not heretofore investigated in freshwater.

Chlorinated Hydrocarbons in the Surface Microlayer and Subsurface Water of the Niagara River, 1985-86

1988 ◽  
Vol 23 (2) ◽  
pp. 292-300 ◽  
Author(s):  
R. James Maguire ◽  
Richard J. Tkacz
Keyword(s):  
Chlorinated Hydrocarbons ◽  
Lake Ontario ◽  
Subsurface Water ◽  
Surface Microlayer ◽  
Water Interface ◽  
Niagara River ◽  
Niagara Falls ◽  
Increased Risk ◽  
Air Water Interface ◽  
High Concentrations

Abstract The surface microlayer of the Niagara River at Niagara-on-the-Lake was sampled 34 times in 1985-86, and was shown to contain PCBs, chlorobenzenes and chlorinated hydrocarbons at concentrations generally up to 40 times greater than concentrations 1n subsurface water. Organisms which spend part or all of their lives at the air-water interface are thus likely to be at increased risk relative to subsurface water exposure. A small “spill” of PCBs 1n the river on July 29, 1986 was only detected in the surface micro-layer, and not in subsurface water. On this date, concentrations of PCBs in the surface microlayer were up to 6,400 times larger than concentrations in the subsurface water, and 1t appeared that the “spill” was downstream of Niagara Falls and the Whirlpool. Despite such high concentrations of chlorinated hydrocarbons in the surface microlayer, at no time during this study did the microlayer contribute significantly, relative to subsurface water, to the loading (i.e., amounts) of these chemicals from the Niagara River to Lake Ontario.

Measurement of heavy metal concentrations and microbiological parameters in the surface microlayer of a downtown pond

2017 ◽  
Vol 17 (4) ◽  
pp. 283-296 ◽  
Author(s):  
Józef Piotr Antonowicz ◽  
Zbigniew Jan Mudryk ◽  
Piotr Perliński ◽  
Jacek Kubiak
Keyword(s):  
Heavy Metal ◽  
Surface Microlayer ◽  
Metal Concentrations ◽  
Heavy Metal Concentrations ◽  
Microbiological Parameters

scholarly journals Microbial Biomass and Enzymatic Activity of the Surface Microlayer and Subsurface Water in Two Dystrophic Lakes

2017 ◽  
Vol 66 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Iwona Kostrzewska-Szlakowska ◽  
Bartosz Kiersztyn
Keyword(s):  
Microbial Biomass ◽  
Inorganic Nitrogen ◽  
Subsurface Water ◽  
Aminopeptidase Activity ◽  
Surface Microlayer ◽  
Humic Lakes ◽  
Organic Matter Concentration ◽  
Subsurface Waters ◽  
Nutrient Resources ◽  
Polyhumic Lake

Nutrient and organic matter concentration, microbial biomass and activities were studied at the surface microlayers (SML) and subsurface waters (SSW) in two small forest lakes of different water colour. The SML in polyhumic lake is more enriched with dissolved inorganic nitrogen (0.141 mg l–1) than that of oligohumic lake (0.124 mg l–1), the former also contains higher levels of total nitrogen (2.66 mg l–1). Higher activities of lipase (Vmax 2290 nmol l–1 h–1 in oligo- and 6098 in polyhumic) and glucosidase (Vmax 41 nmol l–1 h–1 in oligo- and 49 in polyhumic) were in the SMLs in both lakes. Phosphatase activity was higher in the oligohumic SML than in SSW (Vmax 632 vs. 339 nmol l–1 h–1) while in polyhumic lake was higher in SSW (Vmax 2258 nmol l–1 h–1 vs. 1908 nmol l–1 h–1). Aminopeptidase activity in the SSW in both lakes was higher than in SMLs (Vmax 2117 in oligo- and 1213 nmol l–1 h–1 in polyhumic). It seems that solar radiation does inhibit neuston microbial community as a whole because secondary production and the share of active bacteria in total bacteria number were higher in SSW. However, in the oligohumic lake the abundance of bacteria in the SML was always higher than in the SSW (4.07 vs. 2.69 × 106 cells ml–1) while in the polyhumic lake was roughly equal (4.48 vs. 4.33 × 106 cells ml–1) in both layers. Results may also suggest that surface communities are not supplemented by immigration from bulk communities. The SML of humic lakes may act as important sinks for allochthonous nutrient resources and may then generate considerable energy pools for microbial food webs.

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