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5 results for “tipping element”
Text-fig. 3. Cercidiphyllum cf. alalongum R.A.SCOTT et E.A.WHEELER, UF 279-24543. a, b: Diffuse-porous wood, exclusively solitary vessels, axial parenchyma rare, thick-walled fibers, TS. c: Scalariform perforation plate with more than 30 bars, RLS. d: Helical thickenings (HT) in vessel element tip, RLS. e: Opposite to scalariform intervessel pits, RLS. f, g: Heterocellular rays 1–2 cells wide, occasionally uniseriate and biseriate portions of similar width, TLS. h: Ray with alternating rows of procumbent and upright (-square) cells, RLS. Scale bars: 200 µm in a; 100 µm in b, f; 50 µm in c, g, h; 20 µm in d, e. in A Diverse Assemblage Of Late Eocene Woods From Oregon, Western Usa
Text-fig. 3. Cercidiphyllum cf. alalongum R.A.SCOTT et E.A.WHEELER, UF 279-24543. a, b: Diffuse-porous wood, exclusively solitary vessels, axial parenchyma rare, thick-walled fibers, TS. c: Scalariform perforation plate with more than 30 bars, RLS. d: Helical thickenings (HT) in vessel element tip, RLS. e: Opposite to scalariform intervessel pits, RLS. f, g: Heterocellular rays 1–2 cells wide, occasionally uniseriate and biseriate portions of similar width, TLS. h: Ray with alternating rows of procumbent and upright (-square) cells, RLS. Scale bars: 200 µm in a; 100 µm in b, f; 50 µm in c, g, h; 20 µm in d, e.
Data from: Tipping elements in the human intestinal ecosystem
The microbial communities living in the human intestine can have profound impact on our well-being and health. However, we have limited understanding of the mechanisms that control this complex ecosystem. Here, based on a deep phylogenetic analysis of the intestinal microbiota in a thousand western adults, we identify groups of bacteria that exhibit robust bistable abundance distributions. These bacteria are either abundant or nearly absent in most individuals, and exhibit decreased temporal stability at the intermediate abundance range. The abundances of these bimodally distributed bacteria vary independently, and their abundance distributions are not affected by short-term dietary interventions. However, their contrasting alternative states are associated with host factors such as ageing and overweight. We propose that the bistable groups reflect tipping elements of the intestinal microbiota, whose critical transitions may have profound health implications and diagnostic potential.
Distribution maps of Biosphere and Cryosphere tipping elements
<p>This dataset contains a collection of sources that mark the geographical areas of regions/elements/biomes of the Biosphere and the Cryosphere identified as tipping elements on various temporal and spatial scales by the Global Tipping Points Report 2023 (https://global-tipping-points.org) based on:<br>- Armstrong McKay, Sakschewski, Roman-Cuesta et al., In prep.<br>- Winkelmann, Steinert, Armstrong McKay et al., In prep.</p><p>Below you find the data sources for the collection of this dataset. Note that the biosphere data sources provide more biomes than listed here, as only those identified as tipping element are selected here. For the full datasets, including non-tipping biomes, please refer to the original sources listed below.<br> </p><p>BIOSPHERE:</p><p>1. Ecoregions 2017 biomes: https://ecoregions.appspot.com</p><p>Note that only the following biomes were selected: "Tundra", "Tropical & Subtropical Moist Broadleaf Forests","Tropical & Subtropical Coniferous Forests", "Tropical & Subtropical Dry Broadleaf Forests", "Boreal Forests/Taiga", "Temperate Broadleaf & Mixed Forests","Temperate Conifer Forests", "Temperate Grasslands, Savannas & Shrublands","Tropical & Subtropical Grasslands, Savannas & Shrublands","Flooded Grasslands & Savannas","Montane Grasslands & Shrublands", "Deserts & Xeric Shrublands","Mediterranean Forests, Woodlands & Scrub", "Mangroves".</p><p>2. Keith, David A., Ferrer-Paris, Jose R., Nicholson, Emily, ..., Kingsford, Richard T. (2020). Indicative distribution maps for Ecological Functional Groups - Level 3 of IUCN Global Ecosystem Typology [Data set]. Zenodo. http://doi.org/10.5281/zenodo.3546513; <br>and Keith et al. 2022: https://www.nature.com/articles/s41586-022-05318-4</p><p>Note that only the following biomes were selected: "F2_1_Large_perm_lakes", "F2_2_Small_perm_lakes", "F2_4_Freeze-thaw_lakes", "F2_6_Perm_salt_lakes", "M1_1_Seagrass_meadows", "M1_2_Kelp_forests", "M1_3_Photic_coral_reefs", "M4_2_Marine_aquafarms", "M1_5_Marine_animal_forests".<br> </p><p>CRYOSPHERE:</p><p>1. Land permafrost: Obu, Jaroslav; Westermann, Sebastian; Kääb, Andreas; Bartsch, Annett (2018): Ground Temperature Map, 2000-2016, Northern Hemisphere Permafrost. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.888600</p><p>2. Subsea permafrost: Overduin, Pier Paul; Schneider von Deimling, Thomas; Miesner, Frederieke; Grigoriev, Mikhail N; Ruppel, Carolyn D; Vasiliev, Alexander; Lantuit, Hugues; Juhls, Bennet; Westermann, Sebastian; Laboor, Sebastian (2020): Submarine Permafrost Map (SuPerMAP), modeled with CryoGrid 2, Circum-Arctic. PANGAEA, https://doi.org/10.1594/PANGAEA.910540</p><p>3. Sea Ice: Keith, David A., Ferrer-Paris, Jose R., Nicholson, Emily, ..., Kingsford, Richard T. (2020). Indicative distribution maps for Ecological Functional Groups - Level 3 of IUCN Global Ecosystem Typology [Data set]. Zenodo. http://doi.org/10.5281/zenodo.3546513; <br>and Keith et al. 2022: https://www.nature.com/articles/s41586-022-05318-4</p><p>4. Antarctica: Medium resolution vector polygons of the Antarctic coastline (2014) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/ed0a7b70-5adc-4c1e-8d8a-0bb5ee659d18</p><p>5. Greenland: Morlighem M. et al., (2017), BedMachine v3: Complete bed topography and ocean bathymetry mapping of Greenland from multi-beam echo sounding combined with mass conservation, Geophys. Res. Lett., 44, doi:10.1002/2017GL074954</p><p>6. Glaciers: RGI Consortium, . (2012). Randolph Glacier Inventory - A Dataset of Global Glacier Outlines, Version 2 [Data Set]. Boulder, Colorado USA. National Snow and Ice Data Center. https://doi.org/10.7265/cc6e-zp12.<br> </p><p>For any questions regarding the dataset, please free feel to contact Norman J. Steinert (nste@norceresearch.no, normanst@ucm.es)</p>
Data from: Tipping elements in the human intestinal ecosystem
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On thin ice: Solar geoengineering to manage tipping element risks in the cryosphere by 2040
<div>Table S1 shows the three-year schedule needed to certify a special tanker modification. Table S2 and Table S3 provide sources for data that the authors gathered on the cost, annual movements, total number of runways, and construction timelines for the 17 airports included in the paper.</div>
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Allen Brain Atlas
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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.