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Tuesday, August 4, 2020 | History

2 edition of Microbial diversity in Baltic Sea sediments found in the catalog.

Microbial diversity in Baltic Sea sediments

Anna Edlund

Microbial diversity in Baltic Sea sediments

by Anna Edlund

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  • 6 Currently reading

Published by Swedish University of Agricultural Sciences in Uppsala .
Written in English

    Subjects:
  • Marine bacteria -- Baltic Sea.,
  • Archaebacteria -- Baltic Sea.,
  • Bacterial diversity -- Baltic Sea.

  • Edition Notes

    StatementAnna Edlund.
    SeriesActa Universitatis Agriculturae Sueciae -- 2007:26.
    The Physical Object
    Pagination1 v. (various pagings) :
    ID Numbers
    Open LibraryOL16147811M

      Metagenomes from deep Baltic Sea sediments reveal how past and present environmental conditions determine microbial community . from similar Baltic Sea sediment samples produced few long contigs necessary for metagenomic binning (10). We combined single-cell amplified genomics with tran-scriptomics, environmental metabolomics, and targeted enzyme activity assays to build a case for the strategies used by each of the uncultured microbial lineages in situ. RESULTS AND.

    The diversity and metabolic pathways of microorganisms linked to Fe cycling in marine sediments are still poorly understood. Marine microorganisms in general are difficult to isolate and those that have been successfully isolated may not represent the main endogenous population. Various culture-independent techniques have been applied to characterize marine microbial communities, but only. The Wadden Sea, located on the southern shores of the North Sea, is a highly productive tidal flat ecosystem. It is characterized by a high nutrient input from the land as well as from the open sea. This nutrient supply stimulates intense benthic primary production, fuelling microbial activities in the upper sediment layers.

    Novel lineages of bacteria were obtained by sequencing 16S rRNA genes from different red-ox depths and sampling stations indicating that bacterial diversity in Baltic Sea sediments is largely unexplored. Place, publisher, year, edition, pages Uppsala: Sveriges Lantbruksuniversitet, , p. 36 Series. of deposited matter, such as marine sediments. For example, the Baltic Sea’s deepest point, important information about the microbial diversity in a wide range of habitats globally.


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Microbial diversity in Baltic Sea sediments by Anna Edlund Download PDF EPUB FB2

Comparison between hadal water and sediment microbial communities. The relationship between microbial communities in bottom sediments and the overlying deep-sea waters has been rarely investigated in hadal environments. Cell density was two orders of magnitude larger in surface sediments than in hadal water (Fig.

3).Cited by:   Microbial communities can influence the fate of contaminants and nutrients. However, insight into the microbial ecology of the Caspian Sea significantly lags behind other marine systems.

Here we describe microbial biomass, diversity and composition in sediments collected from three sampling stations in the Caspian by:   The phylum Actinobacteria has been reported to be common or even abundant in deep marine sediments, however, knowledge about the diversity, distribution, and function of actinobacteria is limited.

In this study, actinobacterial diversity in the deep sea along the Southwest Indian Ridge (SWIR) was investigated using both 16S rRNA gene pyrosequencing and culture-based by:   1.

Introduction. Marine sediments are the largest global reservoir of methane (Kvenvolden,Valentine, ), and significant levels of methane are produced each year (75– Tg year −1) by biogenic and thermogenic processes (Thauer et al., ).The methane produced is dissolved in sediment pore water and can be transformed or trapped in methane hydrates, while a Cited by: The disappearance of NPs from the sediments by microbial degradation demonstrated a half‐life of 43–71 days.

NP contamination resulted in decreased sediment microbial diversity. A decrease in Microbial diversity in Baltic Sea sediments book the Shannon diversity index and Pielou evenness index together with an increase in Simpson's dominance index were common change patterns observed.

Microbial cells buried in subseafloor sediments comprise a substantial portion of Earth’s biosphere and control global biogeochemical cycles; however, the rate at which they use energy (i.e., power) is virtually unknown. Here, we quantify organic matter degradation and calculate the power utilization of microbial cells throughout Earth’s Quaternary-age subseafloor sediments.

Petter Thureborn, Andrea Franzetti, Daniel Lundin, Sara Sjöling, Reconstructing ecosystem functions of the active microbial community of the Baltic Sea oxygen depleted sediments, PeerJ, /peerj, 4, (e), (). Globally, marine sediments are a vast repository of organic matter, which is degraded through various microbial pathways, including polymer hydrolysis and monomer fermentation.

The sources, abundances, and quality (i.e., labile or recalcitrant) of the organic matter and the composition of the microbial assemblages vary between sediments. Here, we examine new and previously published sediment. Snehit S Mhatre, Stefan Kaufmann, Ian P G Marshall, Stephen Obrochta, Thomas Andrèn, Bo Barker Jørgensen, Bente Aa Lomstein, Microbial biomass turnover times and clues to cellular protein repair in energy-limited deep Baltic Sea sediments, FEMS Microbiology Ecology, /femsec/fiz, 95, 6, ().

Two long-term potentially oil exposed Baltic Sea coastal sites near old oil refineries and harbours were compared to nearby less exposed sites in terms of bacterial, archaeal and fungal microbiomes and oil degradation potential.

The bacterial, archaeal and fungal diversities were similar in oil exposed and less exposed sampling sites based on bacterial and archaeal 16S rRNA gene and. The exploration of the deep biosphere continues to reveal a great diversity of microorganisms, many of which remain poorly understood.

This study provides a first look at the microbial community composition of the Costa Rica Margin sub-seafloor from two sites on the upper plate of the subduction zone, between the Cocos and Caribbean plates. Genetic diversity in the deep virosphere of the Baltic Sea was demonstrated by sequence analysis of the major capsid gene (g23) of T4-like myoviruses, one of the most abundant, ubiquitous, and.

IODP Expedition Baltic Sea Paleoenvironment. Compared to other deep marine sediments studied, these Baltic Sea sediments are young (Holocene in age), sulfate-depleted and organic matter rich.

These sediments represent an opportunity to characterize active microbial community function in a nutrient replete deep biosphere setting. Energy-starved microbes in deep marine sediments subsist at near-zero growth for thousands of years, yet the mechanisms for their subsistence are unknown because no model strains have been cultivated from most of these groups.

We investigated Baltic Sea sediments with single-cell genomics, metabolomics, metatranscriptomics, and enzyme assays to identify possible subsistence mechanisms.

This thesis focuses on microbial community structures and their functions in Baltic Sea sediments. First we investigated the distribution of archaea and bacteria in Baltic Sea sediments along a eutrophication gradient.

Community profile analysis of 16S rRNA genes using terminal restriction length polymorphism (T-RFLP) indicated that archaeal and bacterial communities were spatially heterogeneous. The majority of the seafloor is bioturbated by macrofauna and most organic carbon mineralization in marine sediments is performed by microorganisms inhabiting bioturbated sediment.

However, little is known about how sediment macrofauna influence the community structure of these microorganisms. We show that microbial community composition differs systematically between.

Introduction. Ocean sediments make up one of the largest biomes on earth, harboring an estimated 3 × 10 29 total microbial cells distributed in 3 × 10 8 km 3 of sediment with 8 × 10 7 km 3 of pore water (Kallmeyer et al., ; Amend and LaRowe, ).Deep-sea sediment microbial community composition is influenced by organic matter abundance and content (D’Hondt et al.

Microbial diversity in the abyssal sediments beneath the seafloor of 30, 94, and cm near the southern end of the Mariana Trench was analyzed in the Illumina HiSeq platform. Results show that the microbial populations were dominated by bacteria but merely no archaea were identified at the three depths.

In the bacterial community, Proteobacteria and Firmicutes dominated the total taxon. Abstract. Seven sediment samples have been examined, taken from different depths of the deep-sea in the range of m to m.

A total of 75 different 16S rDNA sequences ( clones) analyzed clustered into the Proteobacteria, Gram-positive bacteria, Cytophaga, Planctomyces, and Actinomycetes and many sequences were from microorganisms that showed no phylogenetic affiliation with known.

Currently, only a few studies have characterized the microbial communities in surface sediments of the Baltic and North Sea. Edlund et al. () performed a clone library study using bromodeoxyuridine (BrdU)-labelled DNA in surface sediments from Askö Island in the open Baltic Sea.

A key characteristic of eutrophication in coastal seas is the expansion of hypoxic bottom waters, often referred to as ‘dead zones’. One proposed remediation strategy for coastal dead zones in the Baltic Sea is to mix the water column using pump stations, circulating oxygenated water to the sea bottom.

Although microbial metabolism in the sediment surface is recognized as key in regulating.Microbial diversity in Baltic Sea sediments.

By Anna Edlund. Download PDF (2 MB) Abstract. This thesis focuses on microbial community structures and their functions in Baltic Sea sediments. First we investigated the distribution of archaea and bacteria in Baltic Sea sediments along a .Cultivation targeting fungi has been done using a sequential sediment samples obtained from the Baltic Sea, Landsort Deep site during the IODP expedition 6 culture media with different nutrition and salt concentration have been tried for the fungi cultivation.

50 isolates of fungi were obtained from the sediment samples.