Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
47
datasets available to search
ShareScore release 0.7.1
Dataset results
47 results for “Brown algae”
Supplementary data to "Changing microbial activities during low salinity acclimation in the brown alga Ectocarpus subulatus"
<p>This data set contains supplementary data related to the paper: “Insights into the potential for mutualistic and harmful host–microbe interactions affecting brown alga freshwater acclimation”: https://onlinelibrary.wiley.com/doi/10.1111/mec.16766</p> <p>Metagenome.zip:<br>This archive contains the reconstructed genomes of the different bacterial bins. The ".gbk" file was used for the reconstruction of metabolic networks. The ".fsa" and ".gff" files were used for "read mapping".</p> <p>Metabolic_networks.zip:<br>This archive contains all bacterial networks in the "padmet" format (see Aite et al. 2018). Furthermore, there is one file containing all gene-reaction associations (for all bins).</p> <p>Expression_data.zip:<br>This file contains algal gene expression data, bacterial gene expression data (number of reads mapping to each feature in each sample), and, lastly, the summarized bacterial expression per metabolic reaction. </p>
FIG. 4. — A, B in New data on the morphology, reproduction and distribution of a freshwater brown alga Porterinema fluviatile (Porter) Waern (Phaeophyceae)
FIG. 4. — A, B, Protoplast division into several parts in apical filament cells resulting in the formation of aplanospores; C, nonmotile aplanospores; D, new thalli developing from aplanospores. Scale bars: 10 µm.
FIG. 2. — A in New data on the morphology, reproduction and distribution of a freshwater brown alga Porterinema fluviatile (Porter) Waern (Phaeophyceae)
FIG. 2. — A, Young filaments composed from elongated vegetative cells with an anastomosis (+) between their filaments. Filament with elongated vegetative cells in the transformation process (+); B, young filaments composed from elongated vegetative cells with plastids; C, D, first phase of the transformation of elongated vegetative cells to inflated vegetative cells. Scale bars: 10 µm.
FIG. 1 in New data on the morphology, reproduction and distribution of a freshwater brown alga Porterinema fluviatile (Porter) Waern (Phaeophyceae)
FIG. 1. — Study area map. Location of the karst limnocrene Mlava Spring and cross section through the siphonal channel.
FIG. 3. — A, B in New data on the morphology, reproduction and distribution of a freshwater brown alga Porterinema fluviatile (Porter) Waern (Phaeophyceae)
FIG. 3. — A, B, Newly formed inflated vegetative cells (ic) with thick walls and a large number of lipid droplets (ld), formation of the approximately oval dark cells (dc) with thick walls, elongated axial cells (eac) of filaments, gradually narrowing to the top; C, D, developing intercalary plurilocular sporangia; E, intercalary plurilocular sporangia on the pedicels. Scale bars: 10 µm.
Linked collectors and determiners for: Brown University - Algae.
Natural history specimen data linked to collectors and determiners held within, "Brown University - Algae". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/ce2eee4e-7f64-4042-a3af-9bcae68dfeda">https://bionomia.net/dataset/ce2eee4e-7f64-4042-a3af-9bcae68dfeda</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/ce2eee4e-7f64-4042-a3af-9bcae68dfeda">https://gbif.org/dataset/ce2eee4e-7f64-4042-a3af-9bcae68dfeda</a>. Formatted as a Frictionless Data package.
Data from: A late Pleistocene marine glacial refugium in the south-west of Hainan Island, China: Phylogeographical insights from the brown alga Sargassum polycystum
Aim: Hainan Island, southern China, is characterized by rich diversity and endemism of marine organisms, yet the underpinning mechanisms and processes contributing to speciation and diversification are poorly understood. Here, the brown alga Sargassum polycystum is used as a model to identify putative marine glacial refugia and explore biogeographical patterns driven by climate change in the late Pleistocene ice ages. Location: South-East Asia. Methods: Mitochondrial cox1 and cox3 and nuclear internal transcribed spacer-2 (ITS2) were obtained from 310, 325 and 313 individuals of S. polycystum (23 localities), respectively. Phylogenetic trees (maximum likelihood and Bayesian inference) and haplotype/ribotype networks were constructed to elucidate phylogeographical patterns. Analysis of molecular variance (AMOVA), neutrality tests (Tajima's D and Fu & Li's D*), current (θπ) and historical (θw) genetic diversities and extended Bayesian skyline plots (EBSP) were used to estimate historical demography. Results: The populations from the south-west of Hainan Island harboured much higher genetic diversity and unique endemism in comparison with other populations in the distribution range. Sargassum polycystum experienced relatively long-term stable population size followed by a continued period of demographic expansion in the late Pleistocene. Main conclusions: Our phylogeographical evidence revealed the existence of a previously unidentified marine refugium specific to S. polycystum in the south-west of Hainan Island, China (the Central Depression of the Yinggehai Basin), along with a possible secondary refugium around the Bali Island, Indonesia. These biogeographical findings provide important insights regarding speciation, adaptation and evolution of marine organisms in South-East Asia and the conservation of unique biodiversity under climate change.
Data from: A late Pleistocene marine glacial refugium in the south-west of Hainan Island, China: Phylogeographical insights from the brown alga Sargassum polycystum
Open the record for dataset details and reuse information.
Towards deciphering dynamic changes and evolutionary mechanisms involved in the adaptation to low salinities in Ectocarpus (brown algae) - test dataset
<p><strong>Objectives :</strong></p> <p>Examine salinity tolerance and adaptations to low salinities in a freshwater strain of Ectocarpuson physiological and molecular levels.</p> <p><strong>Cohort :</strong></p> <p>Two clonal strains of Ectocarpus sp. (Ectocarpales, Phaeophyceae), the genome-sequenced marine strain (MS) (accession CCAP 1310/4, origin San Juan de Marcona, Peru) and a freshwater strain (FWS, accession CCAP 1310/196, origin Hopkins River Falls, Victoria, Australia) were used.</p> <p><strong>Mass spectrometer :</strong></p> <p><br> Gas chromatography-mass spectrometry (GC-MS) as described by Ritteret al.(2008) : samples were analysed with a Hewlett-Packard 5873 Mass Selective Detector interfaced to a Hewlett-Packard 6890 Series+ gas chromatograph (Agilent, Les Ullis, France).</p>
FucoSan: Extraction of fucoidans from different brown algae species using different methods and their chemical and biological characterization
<p>This is a dataset extracted from the database of the Interreg project “FucoSan – Health from the sea” which includes information on the used algae species, the extraction of fucoidans as well as their chemical and pharmacological characterization.</p> <p>Macroalgae represent a vast source of renewable raw materials for research, development and application. An example of current high interest are fucoidans from brown algae. These fucose-containing sulfated polysaccharides exhibit a multitude of bioactivities offering attractive options for applications in medicine and cosmetics. The composition and chemical structure of fucoidans and thus their bioactivities may, however, largely vary depending on the algae species, extraction procedure and many other factors. Therefore, much research is still needed in the range from the algal source up to the targeted development of fucoidans optimized for respective applications. Since 2017, this is the topic of the Danish-German project Interreg project “FucoSan – health from the Sea” involving 11 partners with different expertise. Here, the current state of the fucoidan series produced and explored within the project is presented including information on the used algae species and batches, the extraction, purification and fractionation of the fucoidans as well as their chemical and pharmacological characterization. Based on their basic pharmacological activities, fucoidans are then selected and further tested in advanced experiments for specific applications in medicine and cosmetics.</p>
Figure 1 in Interactive effects of temperature and light on reattachment success in the brown alga Fucus radicans
Figure 1: A schematic description of the experimental setting. The experiment consisted of four such units equipped with a heater, a cooler and a water pump. Each jar (cylinder) represents a pseudoreplicate (n = 8) for a true replicate (n = 3). A tile with four fragments was placed in each jar (the small embedded figure).
Figure 2 in Interactive effects of temperature and light on reattachment success in the brown alga Fucus radicans
Figure 2: Fucus radicans. Percentage (±standard error) of re-attached fragments after 7 weeks cultivation in four different treatment combinations. The x-axis indicates the temperature treatment (4°C or 14°C) while the gray and white bars indicate the low (ca. 33 µmol m−2 s−1, 6 h:18 h light:dark regime) and high light level (ca. 100 µmol m−2 s−1, 16 h:8 h light:dark regime) treatments, respectively. n = 3 (with eight pseudoreplicates each) for each treatment combination.
Figure 5 in Influences of hydrozoan colonization on proteomic profiles of the brown alga Saccharina japonica
Figure 5: A close-up view of 2-dimensional electrophoresis gels showing the identified down-regulated proteins (indicated by arrows) altered by hydrozoan colonization. (A) Healthy tissues. (B) Hydrozoan-colonized tissues.
Figure 1 in Influences of hydrozoan colonization on proteomic profiles of the brown alga Saccharina japonica
Figure 1: Two-dimensional gel electrophoresis profiles of late-harvested Saccharina japonica. (A) Healthy tissues. (B) Hydrozoan-colonized tissues. The separated proteins were visualized by silver staining.
Figure 3 in Influences of hydrozoan colonization on proteomic profiles of the brown alga Saccharina japonica
Figure 3: A close-up view of 2-dimensional electrophoresis gels showing the identified up-regulated proteins (indicated by arrows) altered by hydrozoan colonization. (A) Healthy tissues. (B) Hydrozoan-colonized tissues.
Figure 4 in Influences of hydrozoan colonization on proteomic profiles of the brown alga Saccharina japonica
Figure 4: A close-up view of 2-dimensional electrophoresis gels showing the identified down-regulated proteins (indicated by arrows) found mostly in healthy tissues but rare in hydrozoancolonized tissues. (A) Healthy tissues. (B) Hydrozoan-colonized tissues.
Figure 2 in Influences of hydrozoan colonization on proteomic profiles of the brown alga Saccharina japonica
Figure 2: A close-up view of 2-dimensional electrophoresis gels showing the identified up-regulated proteins (indicated by arrows) found mostly in hydrozoan-colonized tissues but rare in healthy tissues. (A) Healthy tissues. (B) Hydrozoan-colonized tissues.
Data from: Increased evolutionary rates and conserved transcriptional response following allopolyploidisation in brown algae
Genome mergers between independently evolving lineages, via allopolyploidy, can potentially lead to instantaneous sympatric speciation. However, little is known about the consequences of allopolyploidy and the resultant "genome shock" on genome evolution and expression beyond the plant and fungal branches of the Tree of Life. The aim of this study was to compare substitution rates and gene expression patterns in two allopolyploid brown algae (Phaeophyceae, Heterokonta) and their progenitors in the genus Pelvetiopsis N.L. Gardner in the north-east Pacific, and to date their relationships. We used RNA-seq data and putative single-copy loci for phylogenomic, divergence and gene expression analyses. The multispecies coalescent placed the origin of allopolyploids in the late Pleistocene (0.35 – 0.05 Ma). Homoeologues displayed increased non-synonymous divergence compared with parental orthologues, consistent with relaxed selective constraint following allopolyploidization, including for genes with no evidence of pseudogenization or neo-functionalization. Patterns of homeologue-orthologue expression conservation and expression-level dominance were shared with both natural plant and fungal allopolyploids. Interestingly, gene expression also appeared partially linked to the gender of origin of homoeologues. Our results provide further support for common cross-Kingdom patterns of allopolyploid genome evolution and transcriptional responses, here in the evolutionarily distinct marine heterokont brown algae.
FIGURE 3 in A new species of Dactylopusioides (Copepoda: Harpacticoida: Thalestridae) infesting brown algae, and its life history
FIGURE 3. Dactylopusioides malleus sp. nov., male. (A) antennule; (B) P1; (C) Inner short spine on basis of P1 in male; (D) P2; (E) P5; (F) P6. Scales: A–B, D, E, 0.05 mm. C, 0.02 mm
FIGURE 1 in A new species of Dactylopusioides (Copepoda: Harpacticoida: Thalestridae) infesting brown algae, and its life history
FIGURE 1. Dactylopusioides malleus sp. nov., female. (A) whole animal, dorsal view; (B) rostrum; (C) antennule; (D) antenna; (E) genital field and P. 6, ventral view; (F) anal somite and caudal rami, ventral view; (G) mandible; (H) maxillule; (I) coxa of maxillule; (J) maxilla; (K) maxilliped. Scales: A, 0.01 mm; B–E; G–J, 0.02 mm; F, 0.05 mm.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.