Interactions between microbial degradation of sedimentary organic matter and lake hydrodynamics in shallow water bodies: insights from Lake Sarbsko (northern Poland)
TLDR
In this article, the authors demonstrate spatial and seasonal changes in the pathways of microbial decomposition of organic matter within the surface sediments of Lake Sarbsko, a coastal water body located on the middle Polish-Baltic coast.Abstract:
In this paper we demonstrate spatial and seasonal changes in the pathways of microbial decomposition of organic matter within the surface sediments of Lake Sarbsko, a coastal water body located on the middle Polish-Baltic coast. We studied lake waters and bottom sediments at 11 sampling stations throughout the basin and in different seasons between November 2007 and September 2008. It was established that, in this very productive and shallow lake, microbial activity increases in warmer seasons and ceases during winter. In spring, bacterial activity is fuelled by increased influx of highly reactive planktonic organic matter, which is decomposed via methanogenesis, reduction of NO3 -, SO4 2-, and Fe and Mn oxides. On the other hand, during summer, oxidation processes (mainly oxidation of CH4) tend to predominate. The change from reduction to oxidation is attributed to wind-induced vertical mixing of Lake Sarbsko waters and resuspension of bottom deposits. Degradation of sedimentary organic matter in Lake Sarbsko results in appreciable changes in the pH and the concentrations of red-ox sensitive ions in pore waters, but it has little effect on the chemistry of bottom and surface waters. However, release of PO4 3- from the sediments might be a source of this nutrient in the lake. Internal loading of phosphates in Lake Sarbsko occurs under both oxic/mildly reducing and anoxic conditions.read more
Citations
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Composition and origin of organic matter in surface sediments of Lake Sarbsko: A highly eutrophic and shallow coastal lake (northern Poland)
Michał Woszczyk,Achim Bechtel,Reinhard Gratzer,Maciej J. Kotarba,Mikołaj Kokociński,Jens Fiebig,Roman Cieśliński +6 more
TL;DR: In this paper, an organic geochemical study of surface sediments of Lake Sarbsko, a shallow coastal lake on the middle Polish Baltic coast, was carried out to provide evidence concerning the origin of the organic matter and its compositional diversity in surface deposits of this very productive, highly dynamic water body.
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A 700‐year record on the effects of climate and human impact on the southern cape coast inferred from lake sediments of eilandvlei, wilderness embayment, south africa
Bastian Reinwarth,Sarah Franz,Jussi Baade,Torsten Haberzettl,Thomas Kasper,Gerhard Daut,Jörg Helmschrot,Kelly L Kirsten,Lynne J. Quick,Michael E. Meadows,Roland Mäusbacher +10 more
TL;DR: In this article, a lake sediment record spanning approximately the last 670 years from Eilandvlei, a brackish coastal lake situated mid-way between Cape Town and Port Elizabeth is presented.
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A reconstruction of the palaeohydrological conditions of a flood‐plain: a multi‐proxy study from the Grabia River valley mire, central Poland
Dominik Pawłowski,Grzegorz Kowalewski,Krystyna Milecka,Mateusz Płóciennik,Michał Woszczyk,Tomasz Zieliński,Daniel Okupny,Wojciech Włodarski,Jacek Forysiak +8 more
TL;DR: In this article, the authors investigated the Grabia River valley mire in central Poland to reconstruct its palaeoenvironmental conditions from the Younger Dryas to the present and identified phases of high flood intensity and high groundwater level that correlate with regional and supra-regional climatic events.
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Paleogeography of the environment in north-eastern Poland recorded in an Eemian sedimentary basin, based on the example of the Jałówka site
Joanna Rychel,Mirosław T. Karasiewicz,Iwona Krześlak,Leszek Marks,Bożena Noryśkiewicz,Barbara Woronko +5 more
TL;DR: In this article, a 35 cm monolith of sediments was collected from the excavation pit, where the sediments were deposited beneath 4 m thick mineral sediments, and the results of physical and geochemical analysis clearly corresponded with climatic changes determined by palynological analysis.
Journal ArticleDOI
Application of multivariate analysis to determine spatial and temporal changes in water quality after new channel construction in the Chilika Lagoon
Ji Yoon Kim,Krupasindhu Bhatta,Gurdeep Rastogi,Pradipta R. Muduli,Yuno Do,Dong-Kyun Kim,Ajit K. Pattnaik,Gea-Jae Joo +7 more
TL;DR: In this paper, the authors investigated the relationship between water quality variables in a restored lagoon, and temporal and spatial changes at each recovery stage after lagoon restoration, and found that salinity was the dominant factor for the Chilika Lagoon and had maximal component loading in the principal component analysis.
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