Revision of the Psammothidium manguinii complex (Bacillariophyta) in the sub-Antarctic Region with the description of four new taxa

Vijver, Bart Van de

doi:10.5507/fot.2019.001

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…This let us suppose that G. fogedii has a wider distribution in tropical West Africa and the Congo basin, and will be reported from other localities when more studies will be carried out on diatoms from small acid rivers and streams in this part of tropical Africa. As no molecular information is available of Geissleria lubiluensis and G. fogedii to support that the morphological characteristics are genetically determined, we follow the trend currently existing in the description of new diatom species based only morphological characteristics (e.g., Kociolek et al 2015, Kulikovskiy et al 2012, Van de Vijver 2019, Wetzel et al 2019. The ecology of both new species is not well known as they were only observed sporadically in samples from small rivers and streams: Geissleria lubiluensis in the rivers Lubilu, Lokombe, Lotuli and Lukwaj in the Yangambi Biosphere Reserve, and G. fogedii in the river Suhin and one valve in the river Lubilu respectively.…”

Section: Discussionmentioning

confidence: 88%

Description of two new Geissleria species (Bacillariophyta) from Central and West tropical Africa

Cocquyt

2019

Phytotaxa

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During a recently started-up project in the Biosphere Reserve at Yangambi, DR Congo, an unknown Geissleria taxon was observed in a small tributary of the Congo River. This taxon is here described as new to science based on detailed light and scanning electron microscopy observations. Geissleria lubiluensis sp. nov. can be distinguished by the slightly tri-undulate valve margins and the very distinct annulus located at a distance of 3 striae from the apex. The comparison of this taxon with various other Geissleria taxa with resembling valve outline or with resembling annulus structure, led to the description of another new species: Geissleria fogedii sp. nov. reported by Foged from Ghana as Navicula paludosa. This taxon resembles very well Geissleria lubiluensis but differs in the distinct annulus located closer to the apex mostly at the distance of one stria, the broader valves and the denser striation.

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Section: Discussionmentioning

confidence: 88%

Description of two new Geissleria species (Bacillariophyta) from Central and West tropical Africa

Cocquyt

2019

Phytotaxa

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“…Planothidium and Psammothidium are the dominant genera. Both show an often-restricted biogeographical distribution in the (Sub) antarctic region (Van de Vijver et al 2002b;Zidarova et al 2016;Van de Vijver 2019). Psammothidium is often found in epilithic environments, which can be confirmed by their abundance in this group.…”

Section: Campbell Island Diatom Assemblagesmentioning

confidence: 93%

Taxonomic and biogeographical analysis of diatom assemblages from historic bryophyte samples from Campbell Island (sub-Antarctic)

Goeyers¹,

Vitt²,

Vijver³

2022

plecevo

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Background and aims – The past two decades, the non-marine diatom flora in the sub-Aantarctic region has been intensively revised. Historic collections provide excellent tools for answering taxonomic, community-related, and biogeographical questions. This study analysed the moss-inhabiting diatom flora from sub-Antarctic Campbell Island in samples collected in 1969–1970 and retrieved from the British Antarctic Survey herbarium (Cambridge, UK). With this study we attempt to expand our, till now sparse, knowledge on the moss-inhabiting diatom flora in the southern Pacific Ocean.Material and methods – In total, the diatom composition in 32 moss samples has been analysed using Light Microscopy (LM) and Scanning Electron Microscopy (SEM). A biogeographical analysis and community analysis of the Campbell Island diatom flora were conducted.Key results – Analysis of the Campbell Island diatom flora revealed the presence of 141 taxa belonging to 45 genera. The species composition in the dominant genera Planothidium, Humidophila, and Psammothidium, the presence of Epithemia, Rhopalodia, Cocconeis, uncommon in the sub-Antarctic region, and many unidentified taxa point to the uniqueness of the Campbell Island diatom flora. The biogeographical analysis showed an overall low similarity with the other sub-Antarctic and the Maritime Antarctic islands. Four different diatom assemblages were distinguished following the community analysis. Moisture level and habitat type seem to be the main factors shaping the Campbell Island diatom assemblages.Conclusion – The results of the Campbell Island diatom analysis highlight the importance of historic herbarium material. Since the examined flora is largely composed of unknown (presumably new) species, it is vital to analyse additional (historic) samples to complete the assessment of the moss diatom assemblages from Campbell Island.

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“…nov. and P. hodgsonii Van de Vijver et Verleyen sp. nov. from the Sub‐Antarctic region (Van de Vijver, 2019). Wetzel, Van de Vijver, Blanco, and Ector (2019) provided detailed morphological information on several cavum‐bearing Planothidium species, along with an analysis of historical material.…”

Section: Taxonomy and Systematicsmentioning

confidence: 99%

Substratum‐associated microbiota

Furey

Lee

Clemans

2020

Water Environment Research

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Highlights of new, interesting, and emerging research findings on substratum-associated microbiota covered from a survey of 2019 literature from primarily freshwaters provide insight into research trends of interest to the Water Environment Federation and others interested in benthic, aquatic environments. Coverage of topics on bottom-associated or attached algae and cyanobacteria, though not comprehensive, includes new methods, taxa new-to-science, nutrient dynamics, auto-and heterotrophic interactions, grazers, bioassessment, herbicides and other pollutants, metal contaminants, and nuisance, and bloom-forming and harmful algae. Coverage of bacteria, also not comprehensive, focuses on the ecology of benthic biofilms and microbial communities, along with the ecology of microbes like Caulobacter crescentus, Rhodobacter, and other freshwater microbial species. Bacterial topics covered also include metagenomics and metatranscriptomics, toxins and pollutants, bacterial pathogens and bacteriophages, and bacterial physiology. Readers may use this literature review to learn about or renew their interest in the recent advances and discoveries regarding substratum-associated microbiota. © 2020 Water Environment Federation • Practitioner points • This review of literature from 2019 on substratum-associated microbiota presents highlights of findings on algae, cyanobacteria, and bacteria from primarily freshwaters. • Coverage of algae and cyanobacteria includes findings on new methods, taxa new to science, nutrient dynamics, auto-and heterotrophic interactions, grazers, bioassessment, herbicides and other pollutants, metal contaminants, and nuisance, bloomforming and harmful algae. • Coverage of bacteria includes findings on ecology of benthic biofilms and microbial communities, the ecology of microbes, metagenomics and metatranscriptomics, toxins and pollutants, bacterial pathogens and bacteriophages, and bacterial physiology. • Highlights of new, noteworthy and emerging topics build on those from 2018 and will be of relevance to the Water Environment Federation and others interested in benthic, aquatic environments

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Revision of the Psammothidium manguinii complex (Bacillariophyta) in the sub-Antarctic Region with the description of four new taxa

Cited by 6 publications

References 22 publications

Description of two new Geissleria species (Bacillariophyta) from Central and West tropical Africa

Description of two new Geissleria species (Bacillariophyta) from Central and West tropical Africa

Taxonomic and biogeographical analysis of diatom assemblages from historic bryophyte samples from Campbell Island (sub-Antarctic)

Substratum‐associated microbiota

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