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184 results for “high latitude”
FIGURE 11. Hippasteria phrygiana USNM E13586. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 11. Hippasteria phrygiana USNM E13586. A. Abactinal surface. B. Abactinal-lateral surface showing spines and marginal plate series. C. Pedicellariae from actinal surface. D. Actinal surface. Scale Bar= 0.5 cm.
FIGURE 12. Lithosoma novaezelandiae. USNM 1100883. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 12. Lithosoma novaezelandiae. USNM 1100883. A. Abactinal surface. B. Close up of abactinal plates and madreporite. C. Lateral view of marginal plate series. D. Actinal surface. Scale Bar= 0.5 cm.
FIGURE 2. Ceramaster patagonicus USNM 1122413. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 2. Ceramaster patagonicus USNM 1122413. A. Abactinal surface. B. (inset) Madreporite and close-up of abactinal plates. C. Lateral view-Superomarginal and inferomarginal plates (top series and bottom series respectively). D. Pedicellariae on marginal plates. E. Tube foot groove and furrow spines. F. Actinal surface. USNM 1121285. G. Penultimate superomarginals on smaller specimen. Scale Bar= 0.5 cm.
FIGURE 1. Ceramaster patagonicus australis. USNM 1121579. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 1. Ceramaster patagonicus australis. USNM 1121579. A. Abactinal surface. B. Close-up of abactinal plates. C. Close-up of armtip showing superomarginal plate series. D. Actinal surface. E. Close-up of actinal surface showing mouth and furrow spination. Scale Bar = 0.5 cm.
FIGURE 9 in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 9. Cladaster analogus. "small form" USNM 1116312. A. Abactinal surface. B. Close-up of abactinal plates and granules. C. Actinal surface. D. Armtip showing penultimate superomarginal plates. Scale Bar = 0.5 cm.
FIGURE 18. Sphaeridiscus mirabilis. USNM 1116242. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 18. Sphaeridiscus mirabilis. USNM 1116242. A. Abactinal surface. B. Close up of abactinal plates. C. Actinal surface. D. Close up of penultimate superomarginals not enlarged in smaller specimen. CASIZ 174584. E. Penultimate superomarginal enlarged.
FIGURE 6. Chitonaster johannae. USNM E13501. A in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 6. Chitonaster johannae. USNM E13501. A. (inset) Coelomic view of abactinal surface showing overlapping plates with papular pores absent. USNM 1018953 B. Abactinal surface. C. Close up of abactinal surface showing granules and pedicellariae. D. Abactinal view of armtip showing rows of spines/granules. E. Actinal surface. F. Lateral view showing marginal plate series. USNM E13501.G. Close up of actinal intermediate and furrow area with trivalve pedicellariae. Scale Bar= 0.5 cm.
FIGURE 8 in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 8. Cladaster analogus "big form" USNM 1091176. A. Abactinal surface. B. Close-up of abactinal plates. C. Actinal surface. D. Lateral view of superomarginal and inferomarginal plates.
FIGURE 5. Chitonaster felli. USNM 1018861. A. Abactinal surface. B. Actinal surface. C.Marginal plate series. D in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 5. Chitonaster felli. USNM 1018861. A. Abactinal surface. B. Actinal surface. C.Marginal plate series. D. Close-up of enlarged pedicellariae on actinal intermediate surface. Scale Bar = 0.5 cm.
FIGURE 17. Pillsburiaster calvus n in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 17. Pillsburiaster calvus n. sp. Holotype. USNM 1149357. A. Abactinal surface. B. (inset) Closeup of abactinal surface. C. Abactinal surface of armtip. D. Lateral side showing marginal plates. E. Actinal surface.Scale Bar=0.5 cm.
FIGURE 14 in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 14. Pergamaster incertus (USNM 1081793) A. Abactinal surface. B. (inset) Close up of abactinal plates and madreporite. C. Abactinal view of arm showing superomarginals not abutted. D. Actinal surface and furrow spines. E. Lateral view of marginal plate series. USNM E13415 (ex. P. synaptorus) F. Abactinal arm showing abutted superomarginals over midline. Scale Bar= 0.5 cm.
FIGURE 13. Notioceramus anomalus. USNM E13723. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 13. Notioceramus anomalus. USNM E13723. A. Abactinal surface. B. Close-up of abactinal granules. C. Actinal surface. D. Lateral view of superomarginals and inferomarginals.
Supporting data for: Variable habitat depth of the planktonic foraminifera Neogloboquadrina pachyderma in the northern high latitudes explained by sea-ice and chlorophyll concentration
<p>Metadata and environmental data complete with the relative source of the stations included in the study "Variable habitat depth of the planktonic foraminifera <em>Neogloboquadrina pachyderm</em>a in the northern high latitudes explained by sea-ice and chlorophyll concentration".</p> <p>Abbreviations: DH= depth habitat of <em>N. pachyderma</em>, DCM= Depth of Chlorophyll maximum, SST= sea surface temperature, MLD = depth of the mixed layer and SSS= sea surface salinity, DH_Temp= temperature measured at DH, DH_Sal= salinity measured at DH, DH_Density= density measured at DH.</p>
Physiological acclimatization in high-latitude zooplankton
<p>How individual organisms adapt to non-optimal conditions through physiological acclimatization is central to predicting the consequences of unusual abiotic and biotic conditions such as those produced by marine heat waves. The Northeast Pacific, including the Gulf of Alaska experienced an extreme warming event (2014-2016, "The Blob") that affected all trophic levels leading to large-scale changes in the community. The marine copepod <i>Neocalanus flemingeri</i> is one key member of the subarctic Pacific pelagic ecosystem. During the spring phytoplankton bloom this copepod builds substantial lipid stores as it prepares for its non-feeding adult phase. A three-year comparison of gene expression profiles of copepods collected in Prince William Sound in the Gulf of Alaska between 2015 and 2017 included two high-temperature years (2015 and 2016) and one year with very low phytoplankton abundances (2016). The largest differences in gene expression were between high and low chlorophyll years, and not between warm and cool years. The observed gene expression patterns are indicative of physiological acclimatization. The predominant signal in 2016 was the down-regulation of genes involved in glycolysis and its incoming pathways, consistent with the modulation of metabolic rates in response to prolonged low food conditions. Despite the down-regulation of genes involved in metabolism, there was no evidence of suppression of protein synthesis based on gene expression or behavioral activity. Genes involved in muscle function were up-regulated, and the copepods were actively swimming and responsive to stimuli at collection. However, genes involved in fatty acid metabolism were down-regulated in 2016, suggesting reduced lipid accumulation. </p>
Increasing pollen production at high latitudes across animal-pollinated flowering plants
<p><span><b>Aim: </b>Plant reliance on animal mutualists is expected to decrease with latitude owing to increasing environmental instability. As a consequence, more erratic animal pollination in the temperate zones than in the tropics could translate into lower efficiency in pollen transfer, and thus increasing pollen wastage. Despite the relevance of this hypothesis for plant reproductive evolution, the implications of a proposed latitudinal gradient in pollinator reliability for pollen and ovule production, traits directly affecting seed siring and seed set, respectively, remain unresolved. </span></p> <p><span><b>Location: </b>Global.</span></p> <p><span><b>Time period:</b>1971-2020.</span></p> <p><span><b>Major taxa studied: </b>Angiospermae.</span></p> <p><span><b>Methods: </b>Based on a bibliographic survey and our own data, we collated a dataset with information on pollen production (P) and ovule number (O) per flower from 419 studies, including a total of 1392 animal-pollinated angiosperm species from 141 families distributed worldwide and sampled between the equator and 68.35<sup>o </sup>latitude. Using phylogenetic general linear mixed models, we investigated latitudinal variation in P and O. We also tested a latitudinal effect on several ancillary plant traits associated with a plant's mating system and pollinator specialization that might confound any latitudinal effect on gamete production. </span></p> <p><span><b>Results: </b>P but not O was positively associated with latitude, a trend that even became stronger after including the latitudinally-varying ancillary traits (i.e., growth form, flower size, flower symmetry and number of pollinator orders). The latitudinal effect on P was more pronounced among species producing large flowers, a trait that could be linked to self-incompatibility and thus outcrossing. A weak phylogenetic patterning of P also indicates high evolvability potential of this trait that can have an effect on both male and female plant fitness. </span></p> <p><span><b>Main conclusions: </b>Even though a latitudinal trend in pollinator reliability still awaits direct testing, the observed latitudinal increase in P across angiosperms can be interpreted as an evolutionary consequence of an increasingly unpredictable pollination environment.</span></p>
Chemical compositions data for "Space weathering of the Chang'e-5 lunar sample from a mid-high latitude region on the Moon"
<p>Data for “Space weathering of the Chang’e-5 lunar sample from a mid-high latitude region on the Moon”</p>
Supplemental data to Magnitude and Origin of CO2 evasion from high-latitude lakes
<p>Supplemental dataset to the publication: Supplemental data to Seasonal Shifts in Magnitude and Source Contribution of CO2 evasion from High-latitude Lakes submitted to Journal of Geophysical Research: Biogeosciences</p>
First record of oceanic anoxic event 1d at southern high latitudes: Sedimentary and geochemical evidence from International Ocean Discovery Program Expedition 369
<p>Oceanic anoxic event 1d (OAE 1d) has been well studied at northern low latitudes (i.e., in Tethys and the North Atlantic); however, the paleoenvironmental response associated with this event at high latitudes has not been documented and the trigger mechanism remains unknown. Here, we address both of these shortcomings by presenting the first detailed sedimentary and geochemical multi-proxy records of the OAE 1d at southern high latitudes (60-62°S), obtained from sediments at Site U1513, IODP Expedition 369. In particular, the record of sedimentary mercury proxy reveals that OAE 1d is associated with the Central Kerguelen large igneous province volcanism. Furthermore, the significant increase in continental runoff and consequent terrigenous input for southwestern Australia in the southeastern proto-India Ocean might have resulted regionally in weakened bottom-water oxygenation and strengthened organic matter burial during OAE 1d. Oceanic anoxic event 1d (OAE 1d) has been well studied at northern low latitudes (i.e., in Tethys and the North Atlantic); however, the paleoenvironmental response associated with this event at high latitudes has not been documented and the trigger mechanism remains unknown. Here, we address both of these shortcomings by presenting the first detailed sedimentary and geochemical multi-proxy records of the OAE 1d at southern high latitudes (60-62°S), obtained from sediments at Site U1513, IODP Expedition 369. In particular, the record of sedimentary mercury proxy reveals that OAE 1d is associated with the Central Kerguelen large igneous province volcanism. Furthermore, the significant increase in continental runoff and consequent terrigenous input for southwestern Australia in the southeastern proto-India Ocean might have resulted regionally in weakened bottom-water oxygenation and strengthened organic matter burial during OAE 1d.</p>
FIGURE 3 in Southern high latitude squat lobsters II: description of Uroptychus macquariae sp. nov. from Macquarie Ridge
FIGURE 3. Pairwise dissimilarity values for nine sequences of chirostyloid squat lobsters (top panel) and neighbor-joining tree including bootstrap support values (%) at each node (bottom panel).
FIGURE 2 in Southern high latitude squat lobsters II: description of Uroptychus macquariae sp. nov. from Macquarie Ridge
FIGURE 2. Seamount habitat on Macquarie Ridge seamounts. Top panel: Seamount 8 (station TAN0803/92). Bottom panel: Hjort Seamount (station TAN0803/99). Credit: Deep-Towed Imaging System (DTIS)/ NIWA MacRidge 2 voyage.
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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)
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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.