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629 results for “continental shelf”
2007-2016 Surface Circulation over the Mid Atlantic Bight Continental Shelf derived from a Decade of High Frequency Radar Observations
<p>A decade (2007-2016) of hourly 6 km resolution maps of the surface currents across the Mid Atlantic Bight (MAB) generated by a regional-scale High Frequency Radar network are used to reveal new insights into the spatial patterns of the long term annual and seasonal mean surface flows. Across the 10 year time series, temporal means, inter- and intra-annual variability are used to quantify the variability of spatial surface current patterns from season to season and year to year. The 10-year annual mean surface flows are weaker and mostly cross shelf near the coast, increasing in speed and rotating to more alongshore directions near the shelf break, and increasing in speed and rotating to flow off-shelf in the southern MAB. The annual mean surface current pattern is relatively stable year to year compared to the hourly variations within a year. The ten-year seasonal means exhibit similar current patterns, with winter and summer more cross-shore while spring and fall transitions are more alongshore. Fall and winter mean current speeds are larger and correspond to a time when the mean winds are stronger and cross-shore. Summer mean currents are weakest and correspond to a time when the mean wind opposes the alongshore flow. Again, intra-annual variability is much greater than interannual, with the fall season exhibiting the most interannual variability in the surface current patterns. The extreme fall seasons of 2009 and 2011 are related to extremes in the wind and river discharge events caused by different persistent synoptic meteorological conditions, resulting in more or less rapid fall transitions from stratified summer to well-mixed winter conditions.</p>
FIGURE 5 in A new superfamily and family of Hadziida (Amphipoda: Senticaudata), with a description of a new genus and new species from the Brazilian continental shelf
FIGURE 5. Magnovis elizabethae sp. nov.; Holotype, male 12 mm, Campos Basin (40°20'16''W, 20°19'8''S), MBT 180, Campos Basin, Brazil, UFBA 3123. Scale bars: P5–7 (1 mm), U1–3, T(0.5 mm).
FIGURE 4 in A new superfamily and family of Hadziida (Amphipoda: Senticaudata), with a description of a new genus and new species from the Brazilian continental shelf
FIGURE 4. Magnovis elizabethae sp. nov.; Holotype, male 12 mm, Campos Basin (40°20'16''W, 20°19'8''S), MBT 180, Campos Basin, Brazil, UFBA 3123. Scale bars: G1–2 (1 mm); P3–4 (0.5 mm).
FIGURE 7 in A new superfamily and family of Hadziida (Amphipoda: Senticaudata), with a description of a new genus and new species from the Brazilian continental shelf
FIGURE 7. Magnovis elizabethae sp. nov.; Allotype: female 15 mm, Campos Basin (40°20'16''W, 20°19'8''S), MBT 180, Campos Basin, Brazil, UFBA3124. Scale bars: 1.0 mm
FIGURE 2 in A new superfamily and family of Hadziida (Amphipoda: Senticaudata), with a description of a new genus and new species from the Brazilian continental shelf
FIGURE 2. Magnovis elizabethae sp. nov.; Holotype, male 12 mm, Campos Basin (40°20'16''W, 20°19'8''S), MBT 180, Campos Basin, Brazil, UFBA 3123. Scale bars: 0.5 mm.
FIGURE 6 in A new superfamily and family of Hadziida (Amphipoda: Senticaudata), with a description of a new genus and new species from the Brazilian continental shelf
FIGURE 6. Magnovis elizabethae sp. nov.; Allotype: female 15 mm, Campos Basin (40°20'16''W, 20°19'8''S), MBT 180, Campos Basin, Brazil, UFBA 3124. Scale bars: G1–2 (1 mm); U1, T(0.5 mm).
Recent constraints on MIS 3 sea level support role of continental shelf exposure as a control on Indo-Pacific hydroclimate
<p>Continental shelf area is calculated for the Sahul and Sunda shelf using the ICE-PC2 ice history (Pico et al., 2017, Nat. Comm) and the Waelbroeck ice history, based on the global mean sea-level history published in Waelbroeck et al. 2002 (QSR).</p>
Characterizing uncertainty in climate impact projections: a case study with seven marine species on the North American continental shelf
<p>Projections of climate change impacts on living resources are being conducted frequently, and the goal is often to inform policy. Species projections will be more useful if uncertainty is effectively quantified. However, few studies have comprehensively characterized the projection uncertainty arising from greenhouse gas scenarios, Earth system models, and both structural and parameter uncertainty in species distribution modeling. Here we conducted 8964 unique 21st century projections for shifts in suitable habitat for seven economically important marine species including American lobster, Pacific halibut, Pacific ocean perch, and summer flounder. For all species, both the Earth system model used to simulate future temperatures and the niche modeling approach used to represent species distributions were important sources of uncertainty, while variation associated with parameter values in niche models was minor. Greenhouse gas emissions scenario contributed to uncertainty for projections at the century scale. The characteristics of projection uncertainty differed among species and also varied spatially, which underscores the need for improved multi-model approaches with a suite of Earth system models and niche models forming the basis for uncertainty around projected impacts. Ensemble projections show the potential for major shifts in future distributions. Therefore, rigorous future projections are important for informing climate adaptation efforts.</p>
Data from: Projected impacts of warming seas on commercially fished species at a biogeographic boundary of the European continental shelf
<p>1. Projecting the future effects of climate change on marine fished populations can help prepare the fishing industry and management systems for resulting ecological, social and economic changes. Generating projections using multiple climate scenarios can provide valuable insights for fisheries stakeholders regarding uncertainty arising from future climate data.</p> <p>2. Using a range of climate projections based on the Intergovernmental Panel on Climate Change A1B, RCP4.5 and RCP8.5 climate scenarios, we modelled abundance of eight commercially important bottom dwelling fish species across the Celtic Sea, English Channel and southern North Sea through the 21<sup>st</sup> century. This region spans a faunal boundary between cooler northern waters and warmer southern waters, where mean sea surface temperatures are projected to rise by 2 to 4ºC by 2098.</p> <p>3. For each species, Generalised Additive Models were trained on spatially explicit abundance data from six surveys between 2001 and 2010. Annual and seasonal temperatures were key drivers of species abundance patterns. Models were used to project species abundance for each decade through to 2090.</p> <p>4. Projections suggest important future changes in the availability and catchability of fish species, with projected increases in abundance of red mullet (<i>Mullus surmuletus</i> L.), Dover sole (<i>Solea solea </i>L.), John dory (<i>Zeus faber</i> L.) and lemon sole (<i>Microstomus kitt</i> L.) and decreases in abundance of Atlantic cod (<i>Gadus morhua</i> L.), anglerfish (<i>Lophius piscatorius</i> L.) and megrim (<i>Lepidorhombus whiffiagonis</i> L.). European plaice (<i>Pleuronectes platessa </i>L.) appeared less affected by projected temperature changes. Most projected abundance responses were comparable among climate projections, but uncertainty in the rate and magnitude of changes often increased substantially beyond 2040.</p> <p>5. <i>Synthesis and applications</i>. These results indicate potential risks as well as some opportunities for demersal fisheries under climate change. These changes will challenge current management systems, with implications for decisions on target fishing mortality rates, fishing effort and allowable catches. Increasingly flexible and adaptive approaches that reduce climate impacts on species while also supporting industry adaptation are required.</p>
Exploring the roles of iron and irradiance in dynamics of diatoms and Phaeocystis in the Amundsen Sea continental shelf water
<p>The Amundsen Sea continental shelf (ACS) water ecosystem is expected to undergo changes since the increasing melt rate of glaciers and decreasing sea ice extent by global warming would lead to the mitigation of iron and light limitation. We investigated how diatoms and Phaeocystis, two dominant taxa, and primary production in the ACS water would respond to variations in iron and light availabilities by using a 1-D pelagic ecosystem model. In the model, we added sea ice effects that reduce light penetration and optimized model parameters for diatoms and Phaeocystis. The results from our model showed good agreement with 20-year observations of Chl-a as well as the biomass proportion of diatoms and Phaeocystis and nutrient distributions during the growing season. Our model experimental results suggest that the current moderate iron and high light conditions favor the growth of Phaeocystis over diatoms. Moreover, as iron increases, the organic carbon exudation by phytoplankton increases more rapidly than net primary production (NPP), leading to a decline in phytoplankton biomass. On the other hand, irradiance plays a role in controlling NPP in terms of photoinhibition which is reduced by increasing iron. Increases in both iron and irradiance lead to an advance in the timing of the bloom peak (surface Chl-a maximum) due to increases in phytoplankton carbon loss and photoinhibition. Our results imply that the dominance of Phaeocystis can continue and that the carbon uptake capacity of the ACS in the summer seasons might increase given that iron availability will increase with future climate change.</p>
FIGURE 3. 1 in Ecological study based on the distribution of recent foraminifers from southeast of Buenos Aires province, Argentinean Continental Shelf
FIGURE 3. 1. Buccella peruviana (d´Orbigny), dorsal view; UCN-PMIC-209. 2. Buccella peruviana (d´Orbigny), umbilical view; UCN-PMIC-210. 3. Ammonia parkinsoniana (d´Orbigny) dorsal view; UCN-PMIC-211. 4. Ammonia parkinsoniana (d´Orbigny) umbilical view; UCN-PMIC-212. 5. Cribroelphidium gunteri (Cole), UCN-PMIC-213. 6. Cibicides aknerianus (d´Orbigny), dorsal view, UCN-PMIC-214. 7. Quinqueloculina patagonica d´Orbigny; UCN-PMIC-215. 8. Quinqueloculina seminula (Linné); UCN-PMIC-216. 9. Pyrgo ringens Lamarck, UCN-PMIC-217. 10. Bolivina ordinaria Phleger & Parker, UCN-PMIC-218. 11. Bolivina pseudoplicata Heron-Allen & Earland, UCN-PMIC-219. 12. Milliolinella subrotunda (Montagu), UCN-PMIC-220 (Scale = 100µm).
FIGURE 1 in Ecological study based on the distribution of recent foraminifers from southeast of Buenos Aires province, Argentinean Continental Shelf
FIGURE 1. Map showing samples and batimetry of the study area to the southeast Buenos Aires province.
FIGURE 2 in Ecological study based on the distribution of recent foraminifers from southeast of Buenos Aires province, Argentinean Continental Shelf
FIGURE 2. Foraminifera species distribution (≥ 1%), Total abundance (Total A) and diversity such as species number (S) and Shannon Wienner index (H) for each sample.
FIGURE 8 in Three new species of Aricidea (Acmira) (Annelida: Paraonidae) from the Continental Shelf of Eastern Brazil, Southwestern Atlantic
FIGURE 8. Holotype of Aricidea (Acmira) bbkingi sp. nov. A, anterior region, dorsal view; B, prostomium of a paratype, dorsal view; C, largest branchiae; D, parapodium of postbranchiate region, lateral view; E, neuropodium of mid-body.
FIGURE 4 in Three new species of Aricidea (Acmira) (Annelida: Paraonidae) from the Continental Shelf of Eastern Brazil, Southwestern Atlantic
FIGURE 4. Holotype of Aricidea (Acmira) filamentosa sp. nov. A, anterior region, lateral view; B, parapodium, posterior body; C, modified neurochaetae, posterior neuropodium; D, pygidium.
FIGURE 7 in Three new species of Aricidea (Acmira) (Annelida: Paraonidae) from the Continental Shelf of Eastern Brazil, Southwestern Atlantic
FIGURE 7. SEM of Aricidea (Acmira) bbkingi sp. nov. A, anterior region, lateral view; B, branchiate region, dorsal view; C, posterior parapodia, lateral view; D, posterior neuropodium, lateral view. Abbreviations: ant, antena; bra, branchiae; cap, capillary chaetae; cem, modified neurochaeta; lno, notopodial lobe.
FIGURE 6 in Three new species of Aricidea (Acmira) (Annelida: Paraonidae) from the Continental Shelf of Eastern Brazil, Southwestern Atlantic
FIGURE 6. Aricidea (Acmira) pearti sp. nov. A, anterior region, dorsal view; B, parapodium from mid-body, lateral view; C, neuropodium from mid-body, lateral view; D, parapodium from posterior body, lateral view; E, pygidium, ventral view.
FIGURE 5 in Three new species of Aricidea (Acmira) (Annelida: Paraonidae) from the Continental Shelf of Eastern Brazil, Southwestern Atlantic
FIGURE 5. SEM of Aricidea (Acmira) pearti sp. nov. A, anterior region, dorso-lateral view; B, anterior region, ventro-lateral view; C, branchiate region, dorso-lateral view; D, parapodium, dorsal view; E–F, modified neurochaetae. Abbreviations: ant, antenna; bra, branchia; mo, mouth; nl, notopodial lobe; no, nuchal organ.
FIGURE 3 in Three new species of Aricidea (Acmira) (Annelida: Paraonidae) from the Continental Shelf of Eastern Brazil, Southwestern Atlantic
FIGURE 3. SEM of Aricidea (Acmira) filamentosa sp. nov. A, postbranchiate parapodia, lateral view; B, mid-body neuropodium, lateral view; C–D, details of modified pubescent neurochaeta.
FIGURE 2 in Three new species of Aricidea (Acmira) (Annelida: Paraonidae) from the Continental Shelf of Eastern Brazil, Southwestern Atlantic
FIGURE 2. SEM of Aricidea (Acmira) filamentosa sp. nov. A, Anterior region, lateral view; B, prostomium, lateral view; C–E, branchiate region, lateral view; F, posterior parapodia, lateral view; G, posterior region with pygidium, anal cirri missing.
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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.