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163 results for “protist”
Dataset and codes for: Partitioning the apparent temperature sensitivity between autotrophic and heterotrophic protists
<p>Conventional <span>analyses suggest the metabolism of heterotrophs is thermally more sensitive than that of autotrophs, implying that warming leads to pronounced trophodynamic imbalances. However, these analyses inappropriately combine within- and across-taxa trends. We present a novel mathematic framework to separate these, revealing that the higher temperature sensitivity of heterotrophs is mainly caused by within-taxa responses which account for 92% of the difference between autotrophic and heterotrophic protists. This dataset contains both the datasets and R codes of per capita growth rates of autotrophic and heterotrophic protists as well as heterotrophic bacteria and insects.</span></p>
Data from: Higher spatial than seasonal beta diversity of soil protists along elevation gradients
<p>This data package contain the data and R script to reproduce the analyses of the paper from Bruni <em>et al.</em> (in press).</p> <p>It contains:</p> <ul> <li><strong>protist_spatiotemporal_turnover_site_parameters.xlsx</strong>: the list of sites used in this study with their (label, location, geography coordinates, habitat, ENA project and sample accessions) and soil abiotic parameters. Abbreviations and units are as follows: Res_hum, residual humidity [%]; Org_mat, soil organic matter [%]; C_org, organic carbon [mg ∙ g-1]; N_org, organic nitrogen [mg ∙ g-1]; P_bio, bioavailable phosphate [mg ∙ g-1]; C_N_ratio, carbon org. / nitrogen org. ratio; N_P_ratio: nitrogen org. / phosphorus bioavailable ratio.</li> <li><strong>protist_spatiotemporal_turnover_data.RData</strong>: dataset in rda format (R core team, 2024) containing the ASV read's abundance per site matrix (object "mat"), the ASV taxonomic assignments (object "taxo"), the ASV sequences (object "asv") and the CRU-TS monthly climatic data corresponding to the sampled site's location and dates (object "cruts").</li> <li><strong>protist_spatiotemporal_turnover_analyses.R</strong>: R script to reproduce all analyses and figures of Bruni <em>et al.</em> (in press)</li> </ul> <p> </p> <p>References:</p> <p>Bruni, E. P., Lorite, J., Peñas, J., Mulot, M., Fournier, B., Vittoz, P., Mitchell, E. A. D., & Lentendu, G. (2024). Higher spatial than seasonal beta diversity of soil protists along elevation gradients. Frontiers of Biogeography, 17, 1–17. DOI:<a href="https://doi.org/10.21425/fob.17.132637">10.21425/fob.17.132637</a></p> <div> <div>R Core Team. (2024). <em>R: a language and environment for statistical computing</em> (4.2.2) R Foundation for Statistical Computing. <a href="https://www.r-project.org/">https://www.r-project.org/</a></div> </div>
Fig. 3 in Molecular and Morphological Snapshot Characterisation of the Protist Communities in Contrasting Alpine Glacier Forefields
Fig. 3. Rarefaction analysis derived from the clone libraries of the vegetated transects of Tiefen forefield and Wildstrubel forefield. Dashed lines correspond to 95% confidence intervals.
Fig. 2 in Molecular and Morphological Snapshot Characterisation of the Protist Communities in Contrasting Alpine Glacier Forefields
Fig. 2. Relative abundances (in percentage) of ciliate-related sequences detected in the 18S rRNA gene clone libraries from the vegetated transects of the (a) Tiefen forefield and (b) Wildstrubel forefield. Species names are based on BLAST comparison of the sequences with the NCBI database (first similarity with a known taxonomic group).
Fig. 1 in Molecular and Morphological Snapshot Characterisation of the Protist Communities in Contrasting Alpine Glacier Forefields
Fig. 1. Location of the two sampled forefields of the (a) Tiefen glacier and (b) Wildstrubel glacier. Dots indicate sampling spots (white: unvegetated transects; black: vegetated transects).
Fig. 1 in Actinomycin D as an Epimutagen in Protists
Fig. 1. Examples of inherited instability of traits in amoeba clones grown from mononuclear halves of a diheterokarionic cell (from: Yudin 1967, modified). A – resistance of amoebae to methionine (0.15 M, 18–20 h); B – resistance of amoebae to ethanol (7%, 5 min). Abscissa: number of amoebae survived of 50 cells taken in each test (in %); ordinate: number of tests that showed a given survival rate. L, B, and C – amoebae strains; n, nucleus; c, cytoplasm.
Figure 4 in Population Dynamics of Amoeboid Protists in a Tropical Desert: Seasonal Changes and Effects of Vegetation and Soil Conditions
Figure 4. Relationship between amoeboid protist richness and soil parameters during the wet season in three microhabitats by CCA: PL: Pr. laevigata, PP: Pa. praecox, and BS: bare soil. The names and abbreviations of the amoeboid protist species can be found in table 3.
Figure 2 in Population Dynamics of Amoeboid Protists in a Tropical Desert: Seasonal Changes and Effects of Vegetation and Soil Conditions
Figure 2. Cumulative richness plots of amoeboid protists present under Pr. laevigata (PL), Pa. praecox (PP) and bare soil (BS) during dry and wet seasons at 0–30 cm. a) eruptive pseudopods, and b) acanthopodial pseudopods. ND: not determined.
Figure 1 in Population Dynamics of Amoeboid Protists in a Tropical Desert: Seasonal Changes and Effects of Vegetation and Soil Conditions
Figure 1. Study area, showing vegetation patches in the desert of Tehuacán, Puebla, Mexico. In addition, the analyzed microhabitats are shown: Pr. laevigata, Pa. praecox and bare soil.
Fig. 2 in Gamma Radiation Tolerance and Protein Carbonylation Caused by Irradiation of Resting Cysts in the Free-living Ciliated Protist Colpoda cucullus
Fig. 2. Analysis of proteins (Left panel) and protein carbonylation by ECL (Right panel) from non-irradiated and 4000 Gy irradiated cells. The samples in the lanes were from non-irradiated cells (NonIR), 4000 Gy irradiated cells (IR), and cells incubated for 12 h after 4000 Gy irradiation (IR incubated). The protein bands and ECL signals were measured and are shown in parentheses for each lane relative to the Non-IR sample.
Fig. 4 in Gamma Radiation Tolerance and Protein Carbonylation Caused by Irradiation of Resting Cysts in the Free-living Ciliated Protist Colpoda cucullus
Fig. 4. Relative viability of Colpoda vegetative cells, wet cysts, and dry cysts after gamma radiation doses of 0 (non-irradiated), 500, 1000, 2000, 3000, and 4000 Gy. The column heights and attached bars are the means and standard errors, respectively, of six measurements at each dose. Double asterisks indicate a significant difference at p <0.01 (Mann-Whitney U test).
Fig. 3 in Gamma Radiation Tolerance and Protein Carbonylation Caused by Irradiation of Resting Cysts in the Free-living Ciliated Protist Colpoda cucullus
Fig. 3. Excystment of Colpoda dry cysts, after gamma irradiation at 0 (non-irradiated), 500, 1000, 2000, 3000, and 4000 Gy, as a function of time after induction of excystment. The points and bars mark the means and standard errors, respectively, of six measurements at each dose. The excystment mean ± SE at 3, 6, 24, and 96 h after the induction of excystment is shown in (a), (b), (c), and (d), respectively. The column heights and attached bars in (a) to (d) are the means and standard errors, respectively, of six measurements at each dose. Asterisks and double asterisks indicate a significant difference at p <0.05 and p <0.01, respectively (Mann-Whitney U test).
Fig. 1 in Gamma Radiation Tolerance and Protein Carbonylation Caused by Irradiation of Resting Cysts in the Free-living Ciliated Protist Colpoda cucullus
Fig. 1. Excystment of Colpoda wet cysts, after gamma irradiation at 0 (non-irradiated), 500, 1000, 2000, 3000, and 4000 Gy, as a function of time after the induction of excystment. The points and bars mark the means and standard errors, respectively, of six measurements at each dose. The excystment mean ± SE at 3, 6, 9, and 36 h after induction of excystment is shown in (a), (b), (c), and (d), respectively. The column heights and attached bars in (a) to (d) are the means and standard errors, respectively, of six measurements. Asterisks and double asterisks indicate a significant difference at p <0.05 and p <0.01, respectively (Mann-Whitney U test).
Figs. A-D in Three newly recorded heterotrophic euglenids (Protist), Entosiphon oblongum, Euglena longa and Keelungia pulex from South Korea
Figs. A-D: Entosiphon oblongum (KF030). A: General appearance of cell 1, showing ventral view. B: Dorsal view of cell 1. C: Ventral view of cell 2. D: Dorsal view of cell 3; Arrowheads show grooves. E-G: Euglena longa (KF072). E: General appearance of cell 1. F: Cell 2, showing CV. G: Cell 3 showing FR. Arrow heads show paramylum granules. H-J: Keelungia pulex (KM080). H: Cell 1 and cell 2. I: General appearance of gliding cell 3. J: Cell 4 showing dorsal view and ridge (arrow head). FS: feeding siphon, AF: anterior flagellum, PF: posterior flagellum, FR: flagellar reservoir, F: flagellum, CV: contractile vacuole, IA: ingestion apparatus. All micrographs are DIC (differential interference contrast) images. Scale bar: 10 μm in (J).
Fig. 2 in New Korean records of two amoeboid protozoa (Protist); Vannella bursella and Pseudoparamoeba sp.
Fig. 2. Pseudoparamoeba sp, isolate KM045. Locomotive forms of two different cells. (a)(l) Cell 1. (m)(r) Cell 2. Nucleus (N), food vacuole (FV). All micrographs are DIC images with the exceptions of (j)(l) and (q)(r) (phase contrast images). Scale bar in (r) = 10 μm for all images.
Fig. 1 in New Korean records of two amoeboid protozoa (Protist); Vannella bursella and Pseudoparamoeba sp.
Fig. 1. Vannella bursella, isolate KM054, Locomotive forms of seven different cells. (a)(c) Cell 1, (c) note pseudopodia drawn from posterior end of cell. (d) Cell 2. (e) Cell 3. (f)(h) Cell 4. (i) Cells 5 & 6. (j)(l) Cell 7. Nucleus (N), food vacuole (FV). All micrographs are DIC (differential interference contrast) images with the exceptions of (d) and (h) (phase contrast images). Scale bar in (l) = 10 μm for all images.
Figure 1 in Soil protist life matters!
Figure 1. An illustration of the morphological diversity of protists including naked amoebae (the well-known aquatic model species Amoeba proteus, the omnivorous Arachnula impatiens and the network-forming Arboramoeba reticulata), the semi-naked amoeba Cochliopodium vestitum (the shell is covering the amoeba only from above), fruiting bodies of slime moulds (Didymium and Dicyostelium sp), the flagellates Viridiraptor invadens (inside an algal cell) and Thaumatomonas sp. as well as a range of testate amoebae that build shells from various materials.
Fig. 4 in Structure of Organic Spines in the Rhizarian Protist Belonocystis tubistella Rainer, 1968, and a Description of Belonocystis quadrangularis n. sp. (Cercozoa, Insertae Sedis)
Fig. 4. Measurements of cell diameter (excluding spine-scale investitures) in 50 specimens of Belonocystis tubistella and B. quadrangularis.
Figure 2 in Four New Records of Ciliated Protists from Lakshadweep, India
Figure 2. Photomicrograph of live (A, B) and protargol impregnated (C, D) specimens of Oxytricha quadricirrata Indian population. A, B. Specimen showing the body shape (A), cortical granules and position of contractile vacuole (B). C, D. Specimens showing ciliature on the ventral (C) and dorsal surface. AZM - Adoral Zone Membranelles; DK1 - Dorsal Kinety 1; DM - Dorsomarginal row; LM - Left Marginal cirral row; CV - Contractile Vacuole. Scale bars: 25 μm.
Figure 1 in Four New Records of Ciliated Protists from Lakshadweep, India
Figure 1. Photomicrographs of live (A, B) and protargol impregnated (C-G) specimens of Rigidohymena quadrinucleata Indian population. A, B. Specimens showing the body shape and position of contractile vacuole. C. Specimen showing ciliature on the ventral surface. D, F. Specimen showing dorsal kineties and caudal cirri (D). E. Details of the oral apparatus, showing distinct Cyrtohymena-like buccal field. G. Arrangement of four macronuclear nodules. AZM, adoral zone membranelles; DK1, dorsal kinety 1; DM, dorsomarginal kinety; E - Endoral; FC - Frontal Cirri; LM - Left Marginal cirral row; Ma - Macronuclear nodules; P - Paroral; RM - Right Marginal row; TC - Transverse Cirri. Scale bars: 50 μm (A, B), 30 μm (C-F).
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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)
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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.