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35 results for “Arctic fauna”
Data from: Cycles of trans‐Arctic dispersal and vicariance, and diversification of the amphi‐boreal marine fauna
<p>The amphi‐boreal faunal element comprises closely related species and conspecific populations with vicarious distributions in the North Atlantic and North Pacific basins. It originated from an initial trans‐Arctic dispersal in the Pliocene after the first opening of the Bering Strait, and subsequent vicariance through the Pleistocene when the passage through the Arctic was severed by glaciations and low sea levels. Opportunities for further dispersal have risen at times however, and molecular data now expose more complex patterns of inter‐oceanic affinities and dispersal histories. For a general view on the trans‐Arctic dynamics and of the roles of potential dispersal‐vicariance cycles in generating systematic diversity we produced new phylogeographic data sets for amphi‐boreal taxa in 21 genera of invertebrates and vertebrates, and combined them with similar published data sets of mitochondrial coding gene variation, adding up to 89 comparisons involving molluscs, crustaceans, echinoderms, polychaetes, fishes and mammals. Only 39% of the cases correspond with a simple history of Pliocene divergence; in most taxonomical groups, the range of divergence estimates implies connections through the entire Pliocene–Pleistocene‐Holocene time frame. Repeated inter‐oceanic exchange was inferred for 23 taxa, and the latest connection was usually post‐glacial. Such repeated invasions have usually led to secondary contacts and occasionally to widespread hybridization between the different invasion waves. Late‐ or post‐glacial exchange was inferred in 50% of the taxa, stressing the importance of the relatively recent invasions to the current diversity in the Northern Atlantic. Individual taxa also showed complex idiosyncratic patterns and histories, and several instances of cryptic speciation were recognized. In contrast to a simple inter‐oceanic vicariance scenario underlying amphi‐boreal speciation, the data expose complex patterns of reticulation and introgression that complicate the interpretation of taxon boundaries in the region.</p>
A unique demersal fish fauna in the Chukchi Borderland, Central Arctic Ocean
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Data from: Cycles of trans‐Arctic dispersal and vicariance, and diversification of the amphi‐boreal marine fauna
Open the record for dataset details and reuse information.
FIGURE 1 in Terrestrial and Freshwater Invertebrate Fauna of the High Arctic Archipelago of Svalbard
FIGURE 1. Map of the principle islands of the Svalbard archipelago showing the locations of the main research sites, 1) Ny-Ålesund, 2) Longyearbyen, and 3) Hornsund.
FIGURE 5 in Fauna of tintinnids (Tintinnida, Ciliata) during an Arctic-Antarctic cruise, with the S/V "Croatian Tern "
FIGURE 5. Micrograph of tintinnid loricae for species: (a) Codonellopsis frigida. (b) Acanthostomella norvegica. (c) Parafavella elegans. (d,e) Parafavella acuta. (f) Ptychocylis obtusa. (g) Eutintinnus rugosus.
FIGURE 4 in Fauna of tintinnids (Tintinnida, Ciliata) during an Arctic-Antarctic cruise, with the S/V "Croatian Tern "
FIGURE 4. Drawings of tintinnid loricae for species: (A-B) Parafavella gigantea. (C) Parafavella denticulata. (D) Parafavella elegans. (E,F) Parafavella acuta. (G) Parafavella acuta coxlielid.
FIGURE 3 in Fauna of tintinnids (Tintinnida, Ciliata) during an Arctic-Antarctic cruise, with the S/V "Croatian Tern "
FIGURE 3. Drawings of tintinnid loricae for species: (A) Leprotintinnus pellucidus. (B) Codonellopsis glacialis. (C) Codonellopsis frigida. (D, E, F) Ptychocylis obtusa. (G) Tintinnopsis gracilis. (H) Acanthostomella norvegica. (I) Rhabdonellopsis intermedia. (J) Craterella obscura. (K) Cymatocylis convallaria. (L) Eutintinnus colligatus. (M) Eutintinnus turris. (N) Eutintinnus rectus. (O) Eutintinnus rugosus.
Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic
<p>Climate change is altering the biogeochemical and physical characteristics of the Arctic marine environment, which impacts sea ice algal and phytoplankton bloom dynamics and the vertical transport of these carbon sources to benthic communities. Little is known about whether the contribution of sea ice-derived carbon to benthic fauna and nitrogen cycling has changed over multiple decades in concert with receding sea ice. We combined compound-specific stable isotope analysis of amino acids with highly-branched isoprenoid diatom lipid biomarkers using archived (1982-2016) tissue of benthivorous Atlantic walrus to examine temporal trends of sea ice-derived carbon, nitrogen isotope baseline and trophic position of Atlantic walrus at high- and mid-latitudes in the Canadian Arctic. Associated with an 18% sea ice decline in the mid-Arctic, sea ice-derived carbon contribution to Atlantic walrus decreased by 75% suggesting a strong decoupling of sea ice-benthic habitats. In contrast, a nearly exclusive amount of sea ice-derived carbon was maintained in high-Arctic Atlantic walrus (98% in 1996 and 89% in 2006) despite a similar percentage in sea ice reduction. Nitrogen isotope baseline or the trophic position of Atlantic walrus did not change over time at either location. These findings indicate spatial differences in the restructuring of carbon energy sources utilized by Atlantic walrus and their benthic prey and in turn, a change in Arctic marine ecosystem functioning between sea ice-pelagic-benthic habitats.</p>
FIGURE 2 in The mesostigmatid mite (Acari: Parasitiformes) fauna of Svalbard: a revised inventory of a high Arctic archipelago
FIGURE 2. Distribution records of the species found in this study.
Figure 29 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figure 29 - Megaselia giraudii male, left notopleuron (nc = notopleural cleft M= mesopleuron, n = notopleural bristles S= anterior spiracle T = tegula at base of wing).
Figures 2-3 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figures 2-3 - Megaselia kozlovi sp. n. male, hypopygium. 2 right face 3 left face. Scale line: 0.1 mm.
Figures 19-20 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figures 19-20 - Megaselia humeralis female details of abdomen. 19 right lobe at rear of sternum 8 20 tergites 6 and 7.
Figures 13-17 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figures 13-17 - Megaselia fallobreviseta female, details of abdomen. 13 rear of sternum 8 and hypoproct 14 tergite 7 15 sternite 7 16 furca 17 tubular organ. Scale lines: 0.1mm.
Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic
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Figure 10 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figure 10 - Megaselia breviterga female, abdominal tergites 2–6.
Figure 7 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figure 7 - Megaselia kozlovi sp. n. female, Dufour's crop mechanism (anterior end to left).
Figure 8 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figure 8 - Triphleba palposa female, abdominal sternite 7.
Figure 4 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figure 4 - Megaselia kozlovi sp. n. female, abdominal tergites 3–7.
Figure 30 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figure 30 - Megaselia prodroma male, left face of hypopygium. Scale line: 0.1 mm.
Figure 6 from: Disney R (2013) An unusually rich scuttle fly fauna (Diptera, Phoridae) from north of the Arctic Circle in the Kola Peninsula, N. W. Russia. ZooKeys 342: 45-74. https://doi.org/10.3897/zookeys.342.5772
Figure 6 - Megaselia kozlovi sp. n. female, lobe at rear of abdominal sternite 8.
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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.