Bacteria in Weathered Basaltic Glass, Iceland

Cockell, Charles S.; Olsson, Karen M.; Knowles, Felicity; Kelly, Laura C.; Herrera, Aude; Þorsteinsson, Þorsteinn; Marteinsson, V.

doi:10.1080/01490450903061101

Cited by 72 publications

(62 citation statements)

References 62 publications

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“…In contrast, representatives of Bacteroidetes, Actinobacteria, and Proteobacteria were significantly enriched in our study for all mineral types considered. Notably, these taxa have been repeatedly detected on mineral or rock surfaces such as granite, volcanic basaltic glass, marine basalts, or pure particles of apatite (33,(46)(47)(48), indicating that they may be adapted to colonize and inhabit rock and mineral surfaces in terrestrial and aquatic ecosystems.…”

Section: Discussionmentioning

confidence: 99%

Mineral Types and Tree Species Determine the Functional and Taxonomic Structures of Forest Soil Bacterial Communities

Colin

Nicolitch

Turpault³

et al. 2017

Appl Environ Microbiol

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Although minerals represent important soil constituents, their impact on the diversity and structure of soil microbial communities remains poorly documented. In this study, pure mineral particles with various chemistries (i.e., obsidian, apatite, and calcite) were considered. Each mineral type was conditioned in mesh bags and incubated in soil below different tree stands (beech, coppice with standards, and Corsican pine) for 2.5 years to determine the relative impacts of mineralogy and mineral weatherability on the taxonomic and functional diversities of mineral-associated bacterial communities. After this incubation period, the minerals and the surrounding bulk soil were collected to determine mass loss and to perform soil analyses, enzymatic assays, and cultivation-dependent and -independent analyses. Notably, our 16S rRNA gene pyrosequencing analyses revealed that after the 2.5-year incubation period, the mineral-associated bacterial communities strongly differed from those of the surrounding bulk soil for all tree stands considered. When focusing only on minerals, our analyses showed that the bacterial communities associated with calcite, the less recalcitrant mineral type, significantly differed from those that colonized obsidian and apatite minerals. The cultivation-dependent analysis revealed significantly higher abundances of effective mineral-weathering bacteria on the most recalcitrant minerals (i.e., apatite and obsidian). Together, our data showed an enrichment of Betaproteobacteria and effective mineral-weathering bacteria related to the Burkholderia and Collimonas genera on the minerals, suggesting a key role for these taxa in mineral weathering and nutrient cycling in nutrient-poor forest ecosystems.IMPORTANCE Forests are usually developed on nutrient-poor and rocky soils, while nutrient-rich soils have been dedicated to agriculture. In this context, nutrient recycling and nutrient access are key processes in such environments. Deciphering how soil mineralogy influences the diversity, structure, and function of soil bacterial communities in relation to the soil conditions is crucial to better understanding the relative role of the soil bacterial communities in nutrient cycling and plant nutrition in nutrient-poor environments. The present study determined in detail the diversity and structure of bacterial communities associated with different mineral types incubated for 2.5 years in the soil under different tree species using cultivationdependent and -independent analyses. Our data showed an enrichment of specific bacterial taxa on the minerals, specifically on the most weathered minerals, suggesting that they play key roles in mineral weathering and nutrient cycling in nutrientpoor forest ecosystems.KEYWORDS mineral chemistry, bacterial communities, forest soil, mesh bags, mineral weatherability

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Section: Discussionmentioning

confidence: 99%

Mineral Types and Tree Species Determine the Functional and Taxonomic Structures of Forest Soil Bacterial Communities

Colin

Nicolitch

Turpault³

et al. 2017

Appl Environ Microbiol

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“…monoxide as a C and energy source (Dunfield and King, 2004;King and Weber, 2008) or by growing heterotrophically using trace amounts of organic carbon (Cockell et al, 2009;Wu et al, 2007). Studies on the microbiota of volcanic terrains have only emerged within the past few years, revealing that such habitats are capable of harbouring significant microbial diversity, despite their extreme nature (GomezAlvarez et al, 2007;Kelly et al, 2010).…”

Section: Marteinsson Et Al: Microbial Colonization In Diverse Surmentioning

confidence: 99%

Microbial colonization in diverse surface soil types in Surtsey and diversity analysis of its subsurface microbiota

et al. 2015

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Abstract. Colonization of life on Surtsey has been observed systematically since the formation of the island 50 years ago. Although the first colonisers were prokaryotes, such as bacteria and blue-green algae, most studies have been focused on the settlement of plants and animals but less on microbial succession. To explore microbial colonization in diverse soils and the influence of associated vegetation and birds on numbers of environmental bacteria, we collected 45 samples from different soil types on the surface of the island. Total viable bacterial counts were performed with the plate count method at 22, 30 and 37 • C for all soil samples, and the amount of organic matter and nitrogen (N) was measured. Selected samples were also tested for coliforms, faecal coliforms and aerobic and anaerobic bacteria. The subsurface biosphere was investigated by collecting liquid subsurface samples from a 181 m borehole with a special sampler. Diversity analysis of uncultivated biota in samples was performed by 16S rRNA gene sequences analysis and cultivation. Correlation was observed between nutrient deficits and the number of microorganisms in surface soil samples. The lowest number of bacteria (1 × 10 4

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“…Basalt is mineralrich and the rock surface is usually porous enough to provide a good support for bacterial colonization (McMahon et al 2013). Rich bacterial communities have been found living in basalt on Earth (Cockell et al 2009;Templeton et al 2009;Kelly et al 2011). Furthermore, interactions between heterotrophic bacteria and basaltic substrates are known to occur and have been studied and measured previously (e.g.…”

Section: Substrate To Be Studiedmentioning

confidence: 99%

BioRock: new experiments and hardware to investigate microbe–mineral interactions in space

Loudon

Nicholson

Finster

et al. 2017

International Journal of Astrobiology

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In this paper, we describe the development of an International Space Station experiment, BioRock. The purpose of this experiment is to investigate biofilm formation and microbe-mineral interactions in space. The latter research has application in areas as diverse as regolith amelioration and extraterrestrial mining. We describe the design of a prototype biomining reactor for use in space experimentation and investigations on in situ Resource Use and we describe the results of pre-flight tests.

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Bacteria in Weathered Basaltic Glass, Iceland

Cited by 72 publications

References 62 publications

Mineral Types and Tree Species Determine the Functional and Taxonomic Structures of Forest Soil Bacterial Communities

Mineral Types and Tree Species Determine the Functional and Taxonomic Structures of Forest Soil Bacterial Communities

Microbial colonization in diverse surface soil types in Surtsey and diversity analysis of its subsurface microbiota

BioRock: new experiments and hardware to investigate microbe–mineral interactions in space

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