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626 results for “Methanation”
FIGURE 13 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 13. Photos of Laminatubus joycebrooksae n. sp. A, B, C—SIO-BIC A1315, Alvin dive 4501, Mound 12, Costa Rica, 1008 m. D—SIO-BIC A8255, Mound 12, Costa Rica, 1001 m. E– eggs released by the animal.
FIGURE 12 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 12. Photos of Laminatubus joycebrooksae n. sp. A–C—animals in situ, Alvin dive 4501, Mound 12, Costa Rica, 1008 m; D—close-up views of tubes, Alvin dive 4502, Mound 12, Costa Rica, 1000 m. Photo credit: HOV Alvin, Woods Hole Oceanographic Institute.
FIGURE 10 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 10. Photos of Laminatubus paulbrooksi n. sp. A–C—SIO-BIC A11567, A11568, A11569, Guaymas Basin, 1565 m; A—specimen in tube; B—ventro-lateral view of the thorax, C—close-up view of the operculum. D—specimen in tube, Alvin dive 4509, Jaco Scar, Costa Rica, 1866 m.
FIGURE 11 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 11. SEM of Laminatubus paulbrooksi n. sp. (SIO-BIC A1586). A—lateral view of a specimen with radiolar crown. B—close-up view of the thorax. C—collar chaetae. D—close-up view of collar chaetae. E—thoracic chaetae. F—thoracic uncini. G—close-up view of anterior abdominal true trumpet-shaped chaeta. H—anterior abdominal uncini.
FIGURE 9 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 9. Photos of Laminatubus paulbrooksi n. sp. in situ. At Jaco Scar, Costa Rica. Photo credit: ROV SuBastian, Schmidt Ocean Institute.
FIGURE 8 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 8. SEM of Laminatubus alvini AM W.38421 body and chaetae. A—lateral view of thorax, B– collar chaetae, C—ventral view of thorax, D—chaetae of the second thoracic chaetiger, E—anterior abdominal chaetae, details of hollow tip, F—anterior thoracic uncini, G—anterior abdominal uncini.
FIGURE 7 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 7. Photos of Laminatubus alvini specimens, Alvin dive 4094. A, B—variability of opercula, C—view of the thorax showing insertion of peduncle, D—dorsal view of an entire specimen removed from tube, E—lateral view of thorax.
FIGURE 5 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 5. Plot using ABGD (Puillandre et al. 2012) of pairwise distances across all Laminatubus joycebrooksae n. sp. and L. paulbrooksi n. sp. CytB sequences using the Kimura (K80) model. There is a clear 'barcode' gap between L. joycebrooksae n. sp. and L. paulbrooksi n. sp. with the latter taxon showing a high level of intraspecific variation. Uncorrected pairwise distances gave a similar distribution.
FIGURE 4. Combined haplotype networks from CytB data for Laminatubus paulbrooksi n in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 4. Combined haplotype networks from CytB data for Laminatubus paulbrooksi n. sp. (top) from Pacific Costa Rica margin and Gulf of California (Mexico) localities and L. joycebrooksae n. sp. (bottom) from Costa Rica. There was little variability among the L. joycebrooksae n. sp. sequences and a distinct break to L. paulbrooksi n. sp. This corresponds to a minimum 6.4% uncorrected distance. Laminatubus paulbrooksi n. sp. showed marked intraspecific variability with distinct breaks among the three main sites; Costa Rica (9°N), Pescadero (23°N) and Guaymas Basin (27°N). * indicates the holotypes for L. paulbrooksi n. sp. and L. joycebrooksae n. sp. respectively.
FIGURE 3 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 3. Haplotype networks from CytB data for Laminatubus alvini from an extensive section of the East Pacific Rise from 23°N to 38°S, over 7000 km. Only two haplotypes were found.
FIGURE 2 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 2. Maximum likelihood (ML) tree from the analysis of the combined sequences from CytB, 18S, and Histone H3. Numbers on nodes are those bootstrap scores above 50%. * indicates the holotypes for L. paulbrooksi n. sp. and L. joycebrooksae n. sp. respectively.
FIGURE 1 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 1. Distribution of Laminatubus spp. in East Pacific. Black square (L. alvini), white circles (L. paulbrooksi n. sp.) and grey triangle (L. joycebrooksae n. sp.). A black diamond is the type locality of L. alvini on the Galapagos Rift.
Data from: Phosphorus alleviation of nitrogen-suppressed methane sink in global grasslands
<p>Grassland ecosystems account for more than 10% of the global CH<sub>4</sub> sink in soils. A 4-year field experiment found that addition of P alone did not affect CH<sub>4</sub> uptake and experimental addition of N alone significantly suppressed CH<sub>4</sub> uptake, while concurrent N and P additions suppressed CH<sub>4</sub> uptake to a lesser degree. A meta-analysis including 382 data points in global grasslands corroborated these findings. Global extrapolation with an empirical modeling approach estimated that contemporary N addition suppresses CH<sub>4</sub> sink in global grassland by 11.4% and concurrent N and P deposition alleviates this suppression to 5.8%. The P alleviation of N-suppressed CH<sub>4</sub> sink is primarily attributed to substrate competition, defined as the competition between ammonium and CH<sub>4</sub> for the methane monooxygenase enzyme. The N and P impacts on CH<sub>4</sub> uptake indicate that projected increases in N and P depositions might substantially affect CH<sub>4</sub> uptake and alter the global CH<sub>4</sub> cycle.</p>
Data from: Impact of native and non-native aquatic plants on methane emission and phytoplankton growth
Freshwater plants affect the ecosystem functioning of shallow aquatic ecosystems. However, because native plants are threatened by environmental change such as eutrophication, global warming and biological invasions, continued ecosystem functioning may be at risk. In this study, we explored how the growth of native and non-native plant species in eutrophic, warm conditions impacts two plant ecosystem functions: regulation of phytoplankton growth and methane emission. We expected that plants would inhibit phytoplankton growth, while for methane emission both inhibition and stimulation are possible. We conducted an outdoor experiment using monocultures of four native and four non-native freshwater plant species planted at three different densities, as well as a no-plant control. Monocultures of each species were planted in 65 L mesocosms and after three weeks of acclimatisation each mesocosm was inoculated with phytoplankton. Subsequently, we added nutrients twice a week for eight weeks, before harvesting the plant biomass. During these eight weeks, we measured chlorophyll-a concentration thirteen times and the diffusive methane emissions once after four weeks. The mesocosms amplified the temperature of a warm summer so that plants were exposed to higher-than-average temperatures. We found that five plant species lost biomass, two species increased their biomass only at the highest initial plant density (native Myriophyllum spicatum and non-native Lagarosiphon major) and a single species increased its biomass at all densities (on average 14 times its initial mass; amphibious non-native Myriophyllum aquaticum). Overall, the mean biomass change of non-natives was positive, whereas that of natives was negative. This difference in biomass change between native and non-native plants did not relate to overall differences in phytoplankton mass or diffusive methane emissions. In mesocosms where submerged plant species gained biomass, chlorophyll-a concentration was lower than in the no-plant control and mesocosms with biomass loss. Diffusive methane emissions were highest in mesocosms where plants lost considerable biomass, likely because it increased substrate availability for methanogenesis. However, mesocosms where plant biomass increased had emissions similar to the no-plant control, hence we found no inhibitory effects of plant presence on diffusive methane emission. We conclude that plant growth in eutrophic, warm conditions varies strongly with plant identity. Our results furthermore suggest that plant identity determines whether the replacement of native by non-native freshwater plants will alter ecosystem functions such as regulation of phytoplankton growth and methane emission.
Concentrations of dissolved gases at a methane seep in the deep northern Gulf of Mexico measured with an in situ mass spectrometer (ISMS)
<p>Concentrations of dissolved methane, hydrogen sulfide, carbon dioxide and oxygen in a <em>Bathymodiolus</em> mussel bed at a methane seep in the deep northern Gulf of Mexico. The data were collected with an in situ mass spectrometer (ISMS) on May 6, 2015, during a research cruise with RV Nautilus, dive H1423. The location was site MC853, at 28.12835 (lat), -89.14100 (long), in 1080 m water depth. At this site the two mussel species <em>Bathymodiolus brooksi</em> and <em>B. childressi</em> were collected. ISMS measurements were performed before and after the removal of animals from the mussel bed.</p>
Formation and Stability of Salty Soil Seals in Mars-like Conditions. Implications for Methane Variability on Mars.
<p>This is a raw data (Excel Tables) for Figures 4,5,7 in our manuscript: "Formation and Stability of Salty Soil Seals in Mars-like Conditions. Implications for Methane Variability on Mars".</p><p> </p>
Figure 7 in Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls
Figure 7. Micospina auribohnorum gen. et sp. nov. Line drawing, Costa Rican specimen SIO-BIC A1934: A, anterior body dorsal view; B, anterior body ventral view. Abbreviations: I, cirri of segment I; II, parapodia and cirri of segment II; III, parapodia of segment III; la, lateral antennae; mp, mouth papillae; p, palp.
Figure 6 in Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls
Figure 6. Micospina auribohnorum gen. et sp. nov. SEM, Costa Rican specimens SIO-BIC A1599: A, anterior body, dorsal; Dorsal view B, notochaetae; C, anterior end, anteroventral view, arrow indicates nuchal organ; D, neurochaetal blade detail; E, neurochaetal bifid joint detail. Abbreviations: I, cirri of segment I; II, parapodia and cirri of segment II; III, parapodia of segment III; IV, parapodia of segment IV; c, cilia; dc1, dorsal cirrus segment I; e, oocytes; la, lateral antennae; mp, mouth papillae; p, palps; pl, prechaetal lobe.
Figure 9 in Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls
Figure 9. Boudemos flokati gen. et comb. nov., California, adult specimen LACM 2781: A, anterior-body dorsal and ventral parapodium; B, detail of anterior segments I–III, left side, ventral view; C, superior neurochaeta; D, mid-group neurochaeta. Abbreviations: I–III, segments 1–3; dc, dorsal cirrus; vc, ventral cirrus. Boudemos ardabilia gen. et comb. nov., Skagerrak, adult specimen NHM 2008.367: E, ovigerous female, mid-body dorsal and ventral parapodium; F, neurochaetae detail. Abbreviations: bs, bifid shaft; dc, dorsal cirrus; e, oocytes; pl, prechaetal lobe; vc, ventral cirrus.
Figure 5 in Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls
Figure 5. Micospina auribohnorum gen. et sp. nov. Live adults. A, B, San Diego, holotype SIO-BIC A3641, ovigerous female: A, entire body; B, detail anterior end. C–E, Costa Rica, SIO-BIC A1427: C, D, ovigerous female; E, male. Abbreviations: dc1, dorsal cirrus segment I; e, oocytes; la, lateral antennae; pc, pygidial cirri; py, pygidium; s, sperm.
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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.