Iron–Manganese Concretions Sustaining Microbial Life in the Baltic Sea: The Structure of the Bacterial Community and Enrichments in Metal-Oxidizing Conditions

Yli-Hemminki, Pirjo; Jørgensen, Kirsten S.; Lehtoranta, Jouni

doi:10.1080/01490451.2013.819050

Cited by 30 publications

(28 citation statements)

References 58 publications

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“…Similarly, modern-day, deep-sea, Fe-Mn granules are believed to be structured by a host of bacteria living inside and outside granules, comprising both metal oxidisers and reducers (Blothe et al, 2015;Yli-Hemminki et al, 2014). Based on the association of granules in the Biwabik (Fig.…”

Section: Biological Activity In Granules Preserved As Microbialitesmentioning

confidence: 99%

Organic remains in late Palaeoproterozoic granular iron formations and implications for the origin of granules

Dodd

Papineau

She

et al. 2018

Precambrian Research

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Toward the end of the Palaeoproterozoic era, over 10 9 billion tonnes of banded (BIF) and granules. Combined with systematically 13 C-depleted carbonate, these diagenetic mineral assemblages point to the oxidative decay of OM as a major process involved in the formation of granules. Spheroidal equidistant haematite laminations surround some granules and contain apatite associated with carbonate, OM, and ferric-ferrous silicates, and oxides that further suggest these structures were not shaped by wave-action along sediment-water interfaces, but rather by chemical wave fronts and biomineralisation. Our results demonstrate that the formation mechanisms of GIF also involve microbial activity and chemically-oscillating reactions. As such, granules have excellent potential to be considered as promising biosignatures for studying Precambrian biogeochemistry, as well as astrobiology.

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Section: Biological Activity In Granules Preserved As Microbialitesmentioning

confidence: 99%

Organic remains in late Palaeoproterozoic granular iron formations and implications for the origin of granules

Dodd

Papineau

She

et al. 2018

Precambrian Research

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“…The bacterial community composition was investigated by constructing a clone library of 16S ribosomal RNA (rRNA) genes in the extracted DNA pool (Yli-Hemminki et al, 2014). One clone library was constructed from each groundwater well, each consisting of 100 clones.…”

Section: Microbial Community In Groundwatermentioning

confidence: 99%

Bioremediation strategies for removal of residual atrazine in the boreal groundwater zone

Nousiainen

Björklöf

Sagarkar

et al. 2015

Appl Microbiol Biotechnol

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Strategies for bioremediation of atrazine, a pesticide commonly polluting groundwater in low concentrations, were studied in two boreal nonagricultural soils. Atrazine was not mineralized in soil without bioremediation treatments. In biostimulation treatment with molasses, up to 52% of atrazine was mineralized at 10 °C, even though the degradation gene copy numbers did not increase. Incubations with radioactively labeled atrazine followed by microautoradiographic analysis revealed that bioremediation strategies increased the relative proportion of active degraders from 0.3 up to 1.9% of the total bacterial count. These results indicate that atrazine degradation might not solely be facilitated by atzA/trzN-atzB genes. In combined biostimulation treatment using citrate or molasses and augmentation with Pseudomonas citronellolis ADP or Arthrobacter aurescens strain TC1, up to 76% of atrazine was mineralized at 30 °C, and the atrazine degradation gene numbers increased up to 10(7) copies g(-1) soil. Clone libraries from passive samplers in groundwater monitoring wells revealed the presence of phylogenetic groups formerly shown to include atrazine degraders, and the presence of atrazine degradation genes atzA and atzB. These results show that the mineralization of low concentrations of atrazine in the groundwater zone at low temperatures is possible by bioremediation treatments.

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“…Mineral precipitates found on the surface of soft bottom seafloors are ubiquitous in the world's oceans. Formed through a combination of biogeochemical processes, mineral concretions hold high concentrations of iron, manganese, phosphorus, copper, cobalt, and rare earth elements (Yli-Hemminki et al, 2014;Kuhn et al, 2017). Mineral precipitates come in many shapes and sizes, and according to their shape, they may be referred to in many terms.…”

Section: Introductionmentioning

confidence: 99%

“…They are formed through chemical reactions driven by differences in redox potential, creating alternating layers of Fe and Mn (Axelsson et al, 2002;Gasparatos et al, 2005). Concretion formation is further driven by microbial reduction, and the diverse bacterial communities associated with concretions affect both their growth and dissolution (Zhang et al, 2002;Yli-Hemminki et al, 2014). As a result of their complex formation mechanisms, the distribution and abundance of mineral concretions on the seafloor is heterogeneous, and they are found in variable shapes and sizes, ranging from < 2 mm buckshot concretions to crusts of >1 m. They are present in a variety of geological settings, and their growth rates vary, depending on environmental conditions, from 0.003 to 0.3 mm a −1 (Zhamoida et al, 2007;Grigoriev et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Extensive Coverage of Marine Mineral Concretions Revealed in Shallow Shelf Sea Areas

et al. 2019

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Ferromanganese (FeMn) concretions are mineral precipitates found on soft sediment seafloors both in the deep sea and coastal sea areas. These mineral deposits potentially form a three-dimensional habitat for marine organisms, and contain minerals targeted by an emerging seabed mining industry. While FeMn concretions are known to occur abundantly in coastal sea areas, specific information on their spatial distribution and significance for marine ecosystems is lacking. Here, we examine the distribution of FeMn concretions in Finnish marine areas. Drawing on an extensive dataset of 140,000 sites visited by the Finnish Inventory Programme for the Underwater Marine Environment (VELMU), we examine the occurrence of FeMn concretions from seabed mapping, and use spatial modeling techniques to estimate the potential coverage of FeMn concretions. Using seafloor characteristics and hydrographical conditions as predictor variables, we demonstrate that the extent of seafloors covered by concretions in the northern Baltic Sea is larger than anticipated, as concretions were found at ∼7000 sites, and were projected to occur on over 11% of the Finnish sea areas. These results provide new insights into seafloor complexity in coastal sea areas, and further enable examining the ecological role and resource potential of seabed mineral concretions.

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Iron–Manganese Concretions Sustaining Microbial Life in the Baltic Sea: The Structure of the Bacterial Community and Enrichments in Metal-Oxidizing Conditions

Cited by 30 publications

References 58 publications

Organic remains in late Palaeoproterozoic granular iron formations and implications for the origin of granules

Organic remains in late Palaeoproterozoic granular iron formations and implications for the origin of granules

Bioremediation strategies for removal of residual atrazine in the boreal groundwater zone

Extensive Coverage of Marine Mineral Concretions Revealed in Shallow Shelf Sea Areas

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