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

Content Provider	Springer Nature Link
Author	Antowicz, Józef Piotr Mudryk, Zbigniew Zdawicz, Marta
Copyright Year	2015
Abstract	The present study investigated the relationship between accumulations of heavy metals and the concentration of chlorophyll, as well as the number, secondary production and enzymatic activity of bacteria in the surface microlayer (SML) and subsurface waters of a coastal Baltic lake. Concentration of heavy metals was measured by mass spectrometry, chlorophyll by spectrophotometry, bacteria abundance by DAPI staining, secondary production by 3H-thymidine incorporation into DNA and enzymatic activities using fluorescence-labelled substrate methods. Concentrations of all the analysed heavy metals, chlorophyll, as well as the number of heterotrophic bacteria and the level of enzymatic activity were higher in the SML than in subsurface water. No differences in the total number of bacteria in both the studied layers were noted. The rate of secondary production of planktonic bacteria was found to be higher than that of neustonic bacteria. Seasonal variability was observed in the studied chemical and microbiological parameters. It was found that in SML heavy metal concentrations increased in relation to those in subsurface water. However, this did not reduce the level of chlorophyll, heterotrophic bacteria, or the enzymatic activity. In contrast, increased heavy metal concentrations in SML reduced total number of bacteria and the level of secondary productivity.
Starting Page	65
Ending Page	80
Page Count	16
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	762
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-06-07
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coastal lake Neuston Heavy metals Chlorophyll Bacteria Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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