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Figure 1 in The complex case of the calcareous sponge Leucosolenia complicata %Porifera: Calcarea): hidden diversity in Boreal and Arctic regions with description of a new species

Figure 1. The molecular phylogenetic hypothesis of the genus Leucosolenia based on the Bayesian analysis of the concatenated dataset %28S* 18S* and H3 markers). Initial species' names are used on the tips* bold font indicates original specimens used in this study. Each putative species-level clade is coloured according to the revised species hypothesis* the suggested revised species names are provided on the right. All calcaronean species* except representatives of the genus Leucosolenia* are collapsed into a single group* 'Calcaronea rest'. Numbers above branches indicate posterior probabilities from the Bayesian Inference %>0.9)* numbers below branches—bootstrap support from the maximum likelihood %>70).

Figure 6 in The complex case of the calcareous sponge Leucosolenia complicata %Porifera: Calcarea): hidden diversity in Boreal and Arctic regions with description of a new species

Figure 6. Leucosolenia complicata %Montagu* 1814) mesohyl cell types and symbiotic bacteria. A* sclerocyte; B* amoebocyte; C* symbiotic bacteria* morphotype 1; D* symbiotic bacteria* morphotype 2. Scale bars: A* B* 2 µm; C* D* 0.5 µm. Abbreviations: am* amoebocytes; m* mesohyl; n* nucleus; sp* spicule.

Figure 10 in The complex case of the calcareous sponge Leucosolenia complicata %Porifera: Calcarea): hidden diversity in Boreal and Arctic regions with description of a new species

Figure 10. Leucosolenia corallorrhiza %Haeckel* 1872) mesohyl cell types and symbiotic bacteria. A* sclerocytes* inset—septate junctions between sclerocytes; B* amoebocytes; C* D* granular cells in the body wall; E* granular cell; F* degraded granular cell; G* myocytes* inset— bundles of myofilaments; H* I* symbiotic bacteria* morphotype 1. Scale bars: A* B* E* F* 2 µm; C* 50 µm; C* 20 µm; G* 5 µm; H* 0.5 µm; I* 1 µm. Abbreviations: ch* choanocytes; chd* choanoderm; ex* exopinacocyte; exp* exopinacoderm; f* flagellum; gc* granular cells; gr* granule; m* mesohyl; mf* myofibrils; mv* microvilli; my* myocytes; n* nucleus; po* porocytes; sb* symbiotic bacteria; sp* spicule.

Figure 5 in The complex case of the calcareous sponge Leucosolenia complicata %Porifera: Calcarea): hidden diversity in Boreal and Arctic regions with description of a new species

Figure 5. Leucosolenia complicata %Montagu* 1814) body wall structure and cell types of bordering tissues. A* B* semi-thin sections of sponge body wall; C* exopinacocyte; D* endopinacocyte; E* choanocytes; F* porocyte. Scale bars: A* 50 µm; B* 20 µm; C–F* 2 µm. Abbreviations: ch* choanocytes; chd* choanoderm; en* endopinacocyte; ex* exopinacocyte; exp* exopinacoderm; f* flagellum; m* mesohyl; mv* microvilli; n* nucleus; po* porocyte.

Figure 4 in The complex case of the calcareous sponge Leucosolenia complicata %Porifera: Calcarea): hidden diversity in Boreal and Arctic regions with description of a new species

Figure 4. Leucosolenia complicata %Montagu* 1814) spicule types* scanning electron microscopy. A* curved lanceolate diactines; B* C* trichoxeas; D* triactines; E* tetractine.

opencc-by-4.0Aug 2024View details →

40-year monthly mean AVHRR GAC Land Surface Temperature data for the Pan-Arctic region (Pan-Arctic AVHRR LST)

This data collection contains 40 years of monthly mean daytime AVHRR  Global Area Coverage (GAC)  land surface temperature (LST) data. This dataset covers the 1981-2020 perdiod and covers the whole globe above 50° latitude. The spatial extent of the dataset is the following : (-180°, 50°N) ; (180°, 90°N) Dataset description: The LST monthly mean composites are computed from daily daytime LST files, that were generated from the EUMETSAT AVHRR PyGAC FDR (https://navigator.eumetsat.int/product/EO:EUM:DAT:0862) as described in Dupuis et al. (2024). These daily LST files contain only cloud-free pixels and pixels with sufficient quality regarding satellite zenith angle and error margin from the radiative transfer modelling. The probabilistic cloud mask from the CLARA-A3 (https://navigator.eumetsat.int/product/EO:EUM:DAT:0874) dataset has been used. The LST monthly means do not contain any water masks, as potential users might have different requirements regarding water masks. The dataset has been validated against in situ data from the SURFRAD (https://gml.noaa.gov/grad/surfrad/overview.html), ARM (https://arm.gov/capabilities/observatories/nsa) and KIT (https://www.imk-asf.kit.edu/english/skl_stations.php) networks. Data & File Overview: Short description: AVHRR GAC LST daytime monthly mean composites: daily land surface temperature data are averaged to monthly composites for every afternoon and mid-day satellite (10 different satellites). <ul> <li>File List: This dataset contains monthly daytime land surface temperature (LST) data for the AVHRRs onboard NOAA and MetOp satellites. </li> <li>Filename: Pan_Arctic_LST_avhrr_XXXXX_YYYYMM_DAY__***.nc, where XXXXX represents the satellite identifier, YYYYMM the monthly timestamp (YYYY=year, MM=month) and *** the timestamp of the file generation.</li> <li>Relationship between files: Each file covers a one-month period and is recorded by a different satellite.</li> </ul> Satellite identifiers: AVN07 : NOAA 7 AVN09 : NOAA 9 AVN11 : NOAA 11 AVN14 : NOAA 14 AVN16 : NOAA 16 AVN18 : NOAA 18 AVN19 : NOAA 19 AVMEA : MetOp-A AVMEB : MetOp-B AVMEC : MetOp-C Data specific information: The LST files are available as a gridded product in the WGS84 coordinate reference system and are distributed as NetCDF files. The dataset covers the pan-Arctic region (-180°, 90°, 180°, 50°) at a spatial resolution of 0.05°x0.05° pixel size. Each *.nc file contains one variable (LST) with three dimensions (time, lat, lon) and five coordinates (time, lat, lon, band and spatial_ref). - spatial_ref (): stores the spatial information, such as the coordinate reference system (CRS) and WKT string. - time (time): stores the timestamp, here the month and the year of the monthly mean. The timestamp is the same for all pixels belonging to the same composite. - lat (lat): stores the latitude of each pixel - lon (lon): stores the longitude of each pixel - band (): empty inherited layer    Credit: To use this data please cite this dataset and the respective journal publication: Dupuis, S., Göttsche, F.-M., & Wunderle, S. (2024). Temporal stability of a new 40-year daily AVHRR land surface temperature dataset for the pan-Arctic region. The Cryosphere, 18(12), 6027-6059. <a href="https://doi.org/10.5194/tc-18-6027-2024" target="_blank" rel="nofollow noopener">https://doi.org/10.5194/tc-18-6027-2024</a>   <div> <div>@Article{tc-18-6027-2024,</div> <div>AUTHOR = {Dupuis, S. and G\"ottsche, F.-M. and Wunderle, S.},</div> <div>TITLE = {Temporal stability of a new 40-year daily AVHRR land surface temperature dataset for the pan-Arctic region},</div> <div>JOURNAL = {The Cryosphere},</div> <div>VOLUME = {18},</div> <div>YEAR = {2024},</div> <div>NUMBER = {12},</div> <div>PAGES = {6027--6059},</div> <div>URL = {https://tc.copernicus.org/articles/18/6027/2024/},</div> <div>DOI = {10.5194/tc-18-6027-2024}</div> <div>}</div> </div>   Information about funding sources that supported the collection of the data: Dr. Alfred Bretscher Fund (University of Bern)

opencc-by-4.0Sep 2024View details →

Dataset underying the publication titled: Warming-induced contrasts in snow depth drive the future trajectory of soil carbon loss across the Arctic-Boreal region

LPJ-GUESS model outputs underlying the figures published in the article "Warming-induced contrasts in snow depth drive the future trajectory of soil carbon loss across the Arctic-Boreal region".

FIGURE 9 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 9 (part 1). Microscopic pictures of different morphological characters in Sphagnum incundum. A: Stem leaf shapes, B: Stem leaves distal part, C: Stem in transverse sect., D: Stem cortex in superficial view, E: Leaves from middle part of divergent branches, F: Pendent branch leaf, G: Branch leaves in transverse sect., H: Retort cell of branch cortex in superficial view, I: Branch in transverse sect., J–L: Cell structure on convex surface of divergent branch leaves.–J: Distal end portions.–K: Mid-median portion.–L: Proximal end portion. Material (TRH): A: B-9998, 9981, 9718, 693715, B: B-9981, 9998, C: B-38507, D: B-9987, E: B-9998, 9718, F–I: B-9718, J: B-38515, K–L: B-9981.

FIGURE 8 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 8. Sphagnum incundum in field surface view. A: The type collection including selected holotype and isotypes. Collected in Ivujivik, Quebec, Canada, in intermediate, slightly sloping arctic fen. Photo by K. I. Flatberg, 4 July 2007. Flatberg 314-07 (TRH B-9718). B: Together with S. squarrosum, both with young sporophytes. From Inukjuak, Quebec, Canada, in topogenous, rich fen lawn in arctic mire. Photo by K. I. Flatberg, 14 August 2007. Flatberg 451-07 (TRH B-9999).

FIGURE 7 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 7 The histograms show the nuclear integrated density values (IOD) of Sphagnum incundum (A) and S. warnstorii (B, with ploidy level known to be haploid). T = nuclei in telophase (1C), P = nuclei in prophase (2C).

FIGURE 6 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 6. Hyalocyst shapes and pore structure on distal end convex surface of divergent branch leaves (above) and stem leaves (below) in the Sphagnum subnitens complex. A,E: S. flavicomans (TRH B-727084). B,F: S. incundum (TRH B-9718). C,G: S. subfulvum (TRH B-158979). D,H. S. subnitens (TRH B-155847).

FIGURE 4 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 4. ML reconstruction of phylogenetic relationships among Acutifolia species based on the plastid gene trnG and trnL. Maximum likelihood support are shown above branches.

FIGURE 5 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 5. Stem (left) and branch leaf (right) shapes in the Sphagnum subnitens complex. A: S. flavicomans (TRH B-727084). B: S. incundum (TRH B-9718). C: S. subfulvum (TRH B-158979). D. S. subnitens (TRH B-155847).

FIGURE 2 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 2. Haplotype network constructed in SPLITSTREE4 based on genetic distances calculated between all specimens using microsatellite data. The network shows that the four species in the S. subnitens complex are separated into individual branches. The five haplotypes recognized in S. incundum are highlighted in different colors. The number of individuals for each haplotype are given in the circles and the sizes of the circles corresponds to sample size. The geographical location are given for each haplotype of S. incundum.

FIGURE 1. STRUCTURE analysis using microsatellite data shows that Sphagnum incundum form a separate genetic group from S. subnitens and S in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 1. STRUCTURE analysis using microsatellite data shows that Sphagnum incundum form a separate genetic group from S. subnitens and S. subfulvum. Sphagnum flavicomans seems to be a mixture of the recognized genetic groups. The upper panel shows data separated in two genetic groups, the middel panel shows the data separated in three genetic groups, and the lower one show the data separated in four genetic groups.

FIGURE 3 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 3. ML reconstruction of phylogenetic relationships among Acutifolia species based on the nuclear gene atgc89. Maximum likelihood support are shown above branches.

FIGURE 9 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America

FIGURE 9 (part 2). M–N: cell structure on concave surface of divergent branch leaves.–M: Middle portion.–N: Proximal end portion, O: Distal end convex surface of divergent branch leaf with one circular, ringed, perfect and free-lying hyalocyst pore, P: Perigonial leaf from male plant, Q: Perichaetial leaf, R: Spores. Material (TRH): M–N: B-9998, O: B-9987, P: B-9983, Q–R: B-9986.

opencc-by-4.0Oct 2024View details →

Data used in the paper Sensitivity of wintertime Arctic black carbon to removal processes and regional Alaskan sources by Ioannidis et al. 2024

Open the record for dataset details and reuse information.

opennotspecifiedOct 2013View details →

Figure 20 in Taxonomy, biogeography and DNA barcodes of Geodia species (Porifera, Demospongiae, Tetractinellida) in the Atlantic boreo-arctic region

Figure 20. Spicules of the holotype (BMNH 1910.1.1.840) of Geodia phlegraei Sollas, 1880b. A, oxyasters. B, spherasters. A and B have the same scale. C, orthotriaene. D, sterrasters. E, close-up on the hilum of a sterraster. Note the smooth rosettes. Scale bar: 3 Mm.