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31 results for “Nunavik”
FIG. 8 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 8. — SEM images of Kobayasiella pseudostauron (Lange-Bertalot) Lange-Bertalot: A, B, external views of the complete valve; C, D, external views of the central area showing a stauros fascia and the multiseriate poroid covers over the striae between virgae; E, external view of the valve apex showing a curved proximal fissure opening into an irregular surface depression; F, magnified view of the terminal raphe fissure; G, internal view of a broken valve showing T-shaped proximal fissure and elongated helictoglossa. Scale bars: A, B, G, 5 µm; C-E, 2 µm.
FIG. 2 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 2. — Light micrograph diminution series of Kobayasiella Lange-Bertalot species: A-P, Kobayasiella parasubtilissima (Kobayasi & Nagumo) Lange-Bertalot; Q-AB, Kobayasiella madumensis (Jørgensen) Lange-Bertalot; AC-AO, Kobayasiella subtilissima (Cleve) Lange-Bertalot. Scale bar: 10 µm.
FIG. 5 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 5. — SEM images of Kobayasiella madumensis (Jørgensen) Lange-Bertalot: A, external view of the complete valve; B, internal view of the complete valve; C, external view of the axial and central areas showing the multiseriate poroid covers between irregular formed virgae; D, internal view of the central area showing Y-shaped proximal fissures; E, central area with differentially thickened axial ridges; F, external view of the valve apex showing an elevated terminal area with a partially curved proximal fissure; G, internal valve view of the apex. Helictoglossa expanded onto a highline apex. Areolae interrupted around the apex. Scale bars: A, B, 10 µm; C, D, F, 3 µm; E, 500 nm; G, 2 µm.
FIG. 9 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 9. — SEM images of Kobayasiella micropunctata (Germain) Lange-Bertalot: A, B, external views of the complete valve; C, external view of the central area showing the multiseriate poroid covers over the striae between virgae; D, external view of the valve apex showing a hooked terminal fissure opening into an irregular surface depression; E, internal view of the apex with magnified view of the terminal elongated helictoglossa; F, internal view of a copula showing two rows of pores occluded with small round pores. Scale bars: A, B, 5 µm; C, D, 2 µm; E, 1 µm; F, 500 nm.
FIG. 15 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 15. — SEM images of Nupela tenuicephala (Hustedt) Lange-Bertalot: A, B, external views of complete valves with recessed depressions covered with multiporoid volae; C, internal view of the whole valve; D, external view of the central area showing the expanded proximal raphe fissures and multiseriate poroid covers over the areolae; E, internal view of the central area with bent proximal fissures; F, internal views of the apex, helictoglossa small and elevated. Areolae interrupted around the apex. Scale bars: A-C, 5 µm; D, 2 µm; E, F, 1 µm.
FIG. 14 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 14. — SEM images of Sellaphora vincentiana sp. nov.: A, C, E, external views of the complete valve; B, F, external view of the central area showing a linear expanded proximal fissure and recessed poroid covers over the areolae; D, external view of the apex with a bent fissure onto the mantle. Scale bars: A, C, 3 µm; B, D, 1 µm; E, F, 500 nm.
FIG. 1 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 1. — Lake sampling locations and surface deposits in Tursujuq National Park. Insert shows the position of Tursujuq Park in Nunavik, Québec, eastern North America.
FIG. 4 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 4. — SEM images of Kobayasiella parasubtilissima (Kobayasi & Nagumo) Lange-Bertalot: A, external view of the complete valve; B, internal view of the valve areolae recessed between virgae; C, section of girdle band showing one row of evident pore and a second row of scattered less evident pores with volae covers; D, external view of the axial and central areas showing the multiseriate poroid covers between the virgae; E, internal view of the central area showing T-shaped proximal fissures; F, central area with a weak central depression; G, external view of the valve apex, showing a partially curved proximal fissure opening into a small round surface depression; H, internal valve view of the apex. Helictoglossa expanded onto a highline apex. Areolae continuous around the apex. Scale bars: A, 10 µm; B-E, H, 1 µm; F, 600 nm; G, 3 µm.
FIG. 11 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 11. — SEM images of Adlafia bryophila (J.B.Petersen) Lange-Bertalot: A, external view of the complete valve; B, internal view of the complete valve; C, external view of the central area showing the multiseriate poroid covers over the areolae; D, internal view of the central area showing hooked proximal fissures to one side. Copula with one row of large occluded pores; E, external view of the apex with a curved fissure onto the mantle. A curved ridge follows the fissure; F, internal view of the apex with a small elevated helictoglossa. Areolae are continuous around the apex. Scale bars: A, B, 5 µm; C, D, 2 µm; E, F, 1 µm.
FIG. 3 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 3. — Light micrograph diminution series of Kobayasiella Lange-Bertalot species: A-J, Kobayasiella tursujuqensis sp. nov.; K-T. Kobayasiella pseudostauron (Lange-Bertalot) Lange-Bertalot. Scale bar: 10 µm.
FIG. 6 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 6. — SEM images of Kobayasiella subtilissima (Cleve) Lange-Bertalot:A, external view of the complete valve; B, internal view of the complete valve; C, external view of central area showing the multiseriate poroid covers between irregular formed virgae; D, internal view of the central area showing T-shaped proximal fissures and irregular orientated areolae; E, external view of the valve apex showing a partially curved proximal fissure opening into an elliptic surface depression; F, internal valve view of the apex. Helictoglossa expanded onto a highline apex. Areolae continue around the apex. Scale bars: A, B, 5 µm; C, 1 µm; D, F, 3 µm; E, 2 µm.
FIG. 10 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec
FIG. 10. — Light micrograph diminution series of Adlafia Moser, Lange-Bertalot & Metzeltin, Sellaphora Mereschkowski and Nupela Vyverman & Compère species: A-R, Adlafia bryophila (J.B.Petersen) Lange-Bertalot; S-AG, Adlafia umiujaqensis sp. nov.; AH-AT, Adlafia ossiformis sp. nov.; AU-BJ, Sellaphora vincentiana sp. nov.; BK-BY, Nupela tenuicephala (Hustedt) Lange-Bertalot. Scale bar: 10 µm.
HLWATER V1.0 Optical (water bodies Sentinel-2 TOA reflectance retrievals for 23/08/2019) - Western Nunavik (Subarctic Canada)
<p>This dataset refers to the retrieval of TOA reflectance from the Sentinel-2 L1C 10-m bands for 23/08/2019, having as reference the <a href="https://doi.org/10.5281/zenodo.12196313">Very High Resolution water body delineation dataset</a> computed with the <a href="https://doi.org/10.5281/zenodo.10203553">HLWATER V1.0 model</a> (<a href="https://doi.org/10.1016/j.rse.2024.114047">Freitas et al., 2024</a>) for Western Nunavik (Eastern Hudson Bay), Subarctic Canada. It covers a total area of 41,832 km2 within the latitudes 54° to 58° N and the longitudes 74° to 78° W.</p> <p>The dataset is composed of 167,755 water body reflectance retrievals. Additionally, 1 km2 hexagonal grids are provided with the calculation of the limnodiversity (diversity of water optical groups/colors). The optical groups were automatically defined using K-Means to 11 clusters, according to the highest Pseudo-F Score. Outputs are provided in shapefile and geodatabase formats.</p> <p>The manuscript detailing these outputs has been submitted to GIScience and Remote Sensing.</p>
Fig. 5. A data-display network constructed from uncorrected 18S rDNA p in Toxoplasma gondii and related Sarcocystidae parasites in harvested caribou from Nunavik, Canada
Fig. 5. A data-display network constructed from uncorrected 18S rDNA p-distances, using all characters, for tissue dwelling coccidians (mostly Sarcocystis spp.). Group names bear no taxonomic designation but merely assigned for discussion purposes. Bootstrap supports are displayed by the gray curves and associated values imposed on the network. Red dots indicate sequences generated in this study. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 4 in Toxoplasma gondii and related Sarcocystidae parasites in harvested caribou from Nunavik, Canada
Fig. 4. Maximum likelihood topology for tissue dwelling coccidians (mostly Sarcocystis spp.) generated from 18S rDNA sequence data analyzed in RAxML 8 under the GTRCAT approximation. Group names bear no taxonomic designation but merely assigned for discussion purposes. Bootstrap values> 60 are displayed above branches as branch/node support. Red dots indicate sequences generated in this study. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 2 in Toxoplasma gondii and related Sarcocystidae parasites in harvested caribou from Nunavik, Canada
Fig. 2. Observed seroprevalence of antibodies to Toxoplasma gondii and Neospora caninum in caribou harvested from 2 communities in Nunavik. Source: Nunavik Research Centre, Makivik Corporation.
Fig. 1 in Toxoplasma gondii and related Sarcocystidae parasites in harvested caribou from Nunavik, Canada
Fig. 1. General life cycle of Sarcocystidae parasites. 1, For Toxoplasma gondii and Neospora caninum, oocysts are shed in feces by definitive hosts (DH, felids and canids, respectively), sporulate and become infective in the environment, whereas for Sarcocystis spp., sporulation occurs in the intestine of the definitive hosts and sporocysts are immediately infective for intermediate hosts. 2, Intermediate hosts (IH) ingest sporulated oocysts or sporocysts in food, water or soil. 3, Sporozoites are released, divide rapidly, and tachyzoites disseminate to somatic tissues of the IH, and form tissue cysts. 4, DH becomes infected by ingesting prey species with bradyzoites within tissue cysts. Created with BioR ender.com.
Fig. 3 in Toxoplasma gondii and related Sarcocystidae parasites in harvested caribou from Nunavik, Canada
Fig. 3. Sarcocystis DNA prevalence in heart and muscle of caribou harvested by 2 communities in Nunavik, Qu´ebec, Canada.
Supplementary data 'Mitochondrial genome sequence of the protist Ancyromonas sigmoides Kent, 1881 (Ancyromonadida) from the Sugluk Inlet, Hudson Strait, Nunavik, Québec'
<p>Fasta file with the transcripts obtained from RNAseq sequencing of Ancryomonas sigmoides (kmer 35) and file with datamining results.</p><p>Fasta file of the transcript matching the cox1 gene.</p><p>Scaffolds of the kmer 85 assembly of the genomic data of Ancryomonas sigmoides.</p><p>Databse used for datamining (fasta file)</p>
Pairing Remote Sensing and Clustering in Landscape Hydrology for Large-Scale Changes Identification. Applications to the Subarctic Watershed of the George River (Nunavik, Canada). Dataset and Code.
<p>For remote and vast northern watersheds, hydrological data are often sparse and incomplete. Landscape hydrology provides useful approaches for the indirect assessment of the hydrological characteristics of watersheds through analysis of landscape properties. In this study, we used unsupervised Geographic Object-Based Image Analysis (GeOBIA) paired with the Fuzzy C-Means (FCM) clustering algorithm to produce seven high-resolution territorial classifications of key remotely sensed hydro-geomorphic metrics for the 1985-2019 time-period, each spanning five years. Our study site is the George River watershed (GRW), a 42,000 km<sup>2</sup> watershed located in Nunavik, northern Quebec (Canada). The subwatersheds within the GRW, used as the objects of the GeOBIA, were classified as a function of their hydrological similarities. Classification results for the period 2015-2019 showed that the GRW is composed of two main types of subwatersheds distributed along a latitudinal gradient, which indicates broad-scale differences in hydrological regimes and water balances across the GRW. Six classifications were computed for the period 1985-2014 to investigate past changes in hydrological regime. The seven-classification time series showed a homogenization of subwatershed types associated to increases in vegetation productivity and in water content<br> in soil and vegetation, mostly concentrated in the northern half of the GRW, which were the major changes occurring in the land cover metrics of the GRW. An increase in vegetation productivity likely contributed to an augmentation in evapotranspiration and may be a primary driver of fundamental shifts in the GRW water balance, potentially explaining a measured decline of about 1 % (∼ 0.16 km<sup>3</sup>y<sup>−1</sup>) in the George River’s discharge since the mid-1970s. Permafrost degradation over the study period also likely affected the hydrological regime and water balance of the GRW. However, the shifts in permafrost extent and active layer thickness remain difficult to detect using remote sensing based approaches, particularly in areas of discontinuous and sporadic permafrost.</p>
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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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