Epilithic and aerophilic diatoms in the artificial environment of Kungsträdgården metro station, Stockholm, Sweden

Ivarsson, Lena Norbäck; Ivarsson, Magnus; Lundberg, Johannes; Sallstedt, Therese; Rydin, Catarina

doi:10.5038/1827-806x.42.3.12

Cited by 18 publications

(12 citation statements)

References 28 publications

(17 reference statements)

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“…The Kungsträdgården metro station belongs to the line 10 and 11 of the Stockholm metro system and was opened in 1977. The station is constructed in ‘Stockholm granite’ whose approximate age is 1.8 Ga [ 48 ], and is located at a depth of 34 m below ground and 29.3 m below sea level [ 45 ]. The exits are located about 150 meters from the Baltic Sea ( Fig 1 ), which influences the composition of the platform microbiota [ 45 ].…”

Section: Methodsmentioning

confidence: 99%

“…Due to the unusual environmental conditions such as naked rock walls, running meteoritic water and artificial light, the station is hosting a unique ecosystem on the platform walls far from being investigated and understood. The most prominent are active fungal and diatom communities, both involved in carbonate mineralisation, speleothem formation and destruction [ 45 , 46 ].…”

Section: Introductionmentioning

confidence: 99%

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From the Tunnels into the Treetops: New Lineages of Black Yeasts from Biofilm in the Stockholm Metro System and Their Relatives among Ant-Associated Fungi in the Chaetothyriales

et al. 2016

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Rock-inhabiting fungi harbour species-rich, poorly differentiated, extremophilic taxa of polyphyletic origin. Their closest relatives are often well-known species from various biotopes with significant pathogenic potential. Speleothems represent a unique rock-dwelling habitat, whose mycobiota are largely unexplored. Isolation of fungi from speleothem biofilm covering bare granite walls in the Kungsträdgården metro station in Stockholm yielded axenic cultures of two distinct black yeast morphotypes. Phylogenetic analyses of DNA sequences from six nuclear loci, ITS, nuc18S and nuc28S rDNA, rpb1, rpb2 and β-tubulin, support their placement in the Chaetothyriales (Ascomycota). They are described as a new genus Bacillicladium with the type species B. lobatum, and a new species Bradymyces graniticola. Bacillicladium is distantly related to the known five chaetothyrialean families and is unique in the Chaetothyriales by variable morphology showing hyphal, meristematic and yeast-like growth in vitro. The nearest relatives of Bacillicladium are recruited among fungi isolated from cardboard-like construction material produced by arboricolous non-attine ants. Their sister relationship is weakly supported by the Maximum likelihood analysis, but strongly supported by Bayesian inference. The genus Bradymyces is placed amidst members of the Trichomeriaceae and is ecologically undefined; it includes an opportunistic animal pathogen while two other species inhabit rock surfaces. ITS rDNA sequences of three species accepted in Bradymyces and other undescribed species and environmental samples were subjected to phylogenetic analysis and in-depth comparative analysis of ITS1 and ITS2 secondary structures in order to study their intraspecific variability. Compensatory base change criterion in the ITS2 secondary structure supported delimitation of species in Bradymyces, which manifest a limited number of phenotypic features useful for species recognition. The role of fungi in the speleothem biofilm and relationships of Bacillicladium and Bradymyces with other members of the Chaetothyriales are discussed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

From the Tunnels into the Treetops: New Lineages of Black Yeasts from Biofilm in the Stockholm Metro System and Their Relatives among Ant-Associated Fungi in the Chaetothyriales

et al. 2016

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“…Impact of cave tourism (artificial light) is altering the natural light gradient in cave ecosystems, which may have important repercussions on the composition of cyanobacteria communities inside the caves, and that is why, lampenflora can be regarded as invasive [35]. Tourists entering limestone caves are responsible for transferring cyanobacteria spores [36], leading to unintentional biological pollution and favoring, at the same time, the colonization of other cave microorganisms [37]. As a consequence, the alteration of the natural environmental conditions in caves may also modify the cyanobacteria communities.…”

Section: Ecology Of Cyanobacteria In Cavesmentioning

confidence: 99%

Diversity of Cyanobacteria on Limestone Caves

Czerwik-Marcinkowska¹,

Massalski²

2018

Cyanobacteria

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The caves are the biodiversity centers for different types of microorganisms, especially for cyanobacteria. They are also present in almost all extreme environments, and their importance in terrestrial ecosystems is greater because of the decreased competition from vascular plants. Cyanobacteria occurring on rocks are epilithic (colonizing the substrate surface), hypolithic (growing under pebbles and small stones), and endolithic (present in an upper layer of rock). There are three limiting factors for cyanobacteria growing in caves: light or its lack, high humidity, and constant temperature. In caves, one can find not only the cosmopolitan cavernicolous species but also rare taxa. Light, transmission, and scanning electron microscopy (SEM), laboratory cultures, as well as molecular phylogenetic studies are important tools in the study of cave cyanobacteria.

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“…In recent years, a study on the diversity of diatom assemblages in few anthropogenically modified streams has been conducted on the territory of Rzeszów City (Noga et al 2013b(Noga et al , 2016c. The current algological studies on the diversity of diatoms in artificial environments are limited and focused on the species growing on the walls of various buildings (Norbäck Ivarsson et al 2013, Noga et al 2016a).…”

Section: Introductionmentioning

confidence: 99%

Diversity in Anthropogenic Environment – Permanent Puddle as a Place for Development of Diatoms

Rybak¹,

Noga²,

Poradowska³

2019

J. Ecol. Eng.

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Specific conditions in urban areas favour large species richness, these are also places prone to the anthropogenic pressure. As a result, many studies on aquatic habitats in urban ecosystems have been carried out. The aim of this study was to investigate the diversity of diatom assemblages developing in artificial environment in relation to water chemical parameters. The study was performed on a small water outflow in south-eastern Poland, which started in the storm sewage. The water at the studied sites was characterized by alkaline pH and low content of nutrients. The values of other chemical parameters were highly variable, depending on the research season. A total of 113 taxa were identified in five research seasons; most of them prefer circumneutral and fertile habitats, with a high content of biogens and are tolerant to water pollutions. Aerophytic and terrestrial taxa were observed in the analyzed materials in high diversity.

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Epilithic and aerophilic diatoms in the artificial environment of Kungsträdgården metro station, Stockholm, Sweden

Cited by 18 publications

References 28 publications

From the Tunnels into the Treetops: New Lineages of Black Yeasts from Biofilm in the Stockholm Metro System and Their Relatives among Ant-Associated Fungi in the Chaetothyriales

From the Tunnels into the Treetops: New Lineages of Black Yeasts from Biofilm in the Stockholm Metro System and Their Relatives among Ant-Associated Fungi in the Chaetothyriales

Diversity of Cyanobacteria on Limestone Caves

Diversity in Anthropogenic Environment – Permanent Puddle as a Place for Development of Diatoms

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