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132 results for “Freshwater diatoms”
Three reference genomes for freshwater diatom ecology and evolution
<p>This repository contains the genome assemblies and gene models provided for "Three reference genomes for freshwater diatom ecology and evolution"</p> <p>Authors:</p> <p>Wade R. Roberts (email: wader [at] uark [dot] edu)</p> <p>Andrew J. Alverson (email: aja [at] uark [dot] edu)</p> <p> </p> <p>The Whole Genome Shotgun (WGS) projects are available from NCBI GenBank under accession JALLPB020000000 (C. tholiformis), JALLBG020000000 (D. pseudostelligera), and JALLAZ020000000 (P. triporus).<strong></strong></p> <p><br>The following files are included:</p> <p>Cyclostephanos tholiformis strain AJA228-03</p> <p> aja228-03.consensus.fasta</p> <p> aja228-03.consensus.gff3<br> <br> aja228-03.consensus.proteins.fasta</p> <p> aja228-03.consensus.combined_uniprot_annotation.csv</p> <p> aja228-03.consensus.panther_annotation.csv</p> <p> aja228-03.consensus.pfam_annotation.csv</p> <p> </p> <p>Discostella pseudostelligera strain AJA232-27</p> <p> aja232-27.consensus.fasta</p> <p> aja232-27.consensus.gff3<br> <br> aja232-27.consensus.proteins.fasta</p> <p> aja232-27.consensus.combined_uniprot_annotation.csv</p> <p> aja232-27.consensus.panther_annotation.csv</p> <p> aja232-27.consensus.pfam_annotation.csv</p> <p> </p> <p>Praestephanos triporus strain AJA276-08</p> <p> aja276-08.consensus.fasta</p> <p> aja276-08.consensus.gff3<br> <br> aja276-08.consensus.proteins.fasta</p> <p> aja276-08.consensus.combined_uniprot_annotation.csv</p> <p> aja276-08.consensus.panther_annotation.csv</p> <p> aja276-08.consensus.pfam_annotation.csv</p> <p> </p> <p>R code and phylogenetic tree to reproduce Figure 1 in the manuscript</p> <p> plot-figure-1.R</p> <p> busc.prot.concat.partition.rooted.tree</p> <p> </p>
Diatom biogeography in freshwaters – new insights from between-region comparisons and the role of unmeasured environmental factors
<p>Diatom biogeography has attracted increased attention especially over the past two decades. However, due to covariance between space and environment, diatom biogeographical studies suffer from the fundamental problem of reliably evaluating the relative roles of dispersal processes versus local environment in shaping diatom distributions. Using between-region comparisons, we investigate whether diatom community differences stem partly from dispersal effects or are purely driven by the local environment. The data used comprise diatom presence-absence records and associated environmental-variable data from streams in Iceland and in northern Fennoscandia (Finland and Norway), and from ponds and lakes in Italy and northern Fennoscandia. We found that between-region differences were larger for diatom community composition than for local environmental variables, perhaps suggesting that biogeographical factors such as dispersal limitation or dispersal history influenced diatom communities causing their spatial segregation. We further discuss methods for disentangling the roles of spatial and environmental effects in shaping diatom communities. Finally, we highlight the possible role of unmeasured environmental factors in diatom biogeographical research.</p>
FIGURES 2–23 in Encyonema bonapartei sp. nov.: a new freshwater diatom species (Cymbellales, Bacillariophyceae) in canals of Great East region (France)
FIGURES 2–23. Encyonema bonapartei LM valve views (type material from Sampigny). Scale bar = 10 μm.
FIGURE 1 in Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabela = Albemarle) from the Galapagos
FIGURE 1: The Galápagos Islands with diatom sampling site on Isabela (Albemarle) Island.
Data from: Next-generation sequencing to inventory taxonomic diversity in eukaryotic communities: a test for freshwater diatoms
Open the record for dataset details and reuse information.
Data from: Timing marine-freshwater transitions in the diatom order Thalassiosirales
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Diatom biogeography in freshwaters – new insights from between-region comparisons and the role of unmeasured environmental factors
Open the record for dataset details and reuse information.
The dynamic response to hypoosmotic stress reveals distinct stages of freshwater acclimation by a euryhaline diatom
GEO Series GSE206725. Cyclotella cryptica. 27 samples. Type: Expression profiling by high throughput sequencing.
Figure 1 from: Cocquyt C, Lokele Ndjombo E, Tutu Tsamemba S, Nshimba Seya wa Malale H (2019) Freshwater diatoms in the Democratic Republic of the Congo: a historical overview of the research and publications. PhytoKeys 136: 107-125. https://doi.org/10.3897/phytokeys.136.47386
Figure 1 Number of new diatom taxa (specific and infraspecific) described from DR Congo per decade.
FIGURES 16–23 in Pinnularia dongzhenensis sp. nov., a new freshwater diatom species (Bacillariophyceae) from Dongzhen Reservoir, Fujian Province, China
FIGURES 16–23. Pinnularia dongzhenensis sp. nov., SEM internal views of P. dongzhenensis sp. nov.. 16, 17. Entire valve. 18, 19. Central area; an intermissio is apparently lacking. 20, 21. View showing alveoli pattern. 22, 23. Valve apex showing typical helictoglossa. Scale bars = 10 μm (Figs 13, 17), 2 μm (Figs 18–23).
FIGURES 45–50 in Staurosirella paranaensis sp. nov., a new epiphytic freshwater diatom (Bacillariophyceae) from the Paraná River floodplain, Brazil, South America
FIGURES 45–50. SEM. Staurosirella paranaensis sp. nov. from type material. 45–50. Internal view. 47. Virgae doubly flared, internally, axial area and virgae are raised leaving the striae in depressions. 48–50. Volae branched and originated from the sides of the areolae projected towards the valve interior. Scale bars are identified in the SEM images.
FIGURES 1–35 in Planothidium africanum sp. nov., a new freshwater diatom (Bacillariophyta) species from Tanzania
FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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