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  • 1
    Publication Date: 2023-12-14
    Keywords: Aluminium; Aluminium oxide; Canada; Carbon, organic, total; Degree of pyritization; Elevation of event; Event label; Gujo-Hachiman, Gifu Prefecture, Japan; Iron; Iron oxide, Fe2O3; Japan; Laboratory code/label; Latitude of event; Longitude of event; Manganese; Manganese dioxide; Mass extinction; Permian; PTB-Tl_GH; PTB-Tl_OC; ROCK; Rock sample; Run Number; Sample ID; SECTION, height; shale; Thallium; thallium isotopes; Triassic; Ubara_Japan; Ubara, Kyoto Prefecture, Japan; δ13C, organic carbon; ε-Thallium-205; ε-Thallium-205, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 957 data points
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  • 2
    Publication Date: 2024-04-20
    Description: A compilation of the thallium isotopic data (along with previously published geochemical information) from organic-rich shales across the end-Permian mass extinction event, covering the latest Permian and earliest Triassic. Samples are from the Ubara and Gujo-Hachiman outcrops in Japan and Opal Creek outcrop in Alberta, Canada. The thallium isotopic analysis was done to constrain changes in global deoxygenation across the extinction event and link marine anoxia to the extinction. Analyses were done following thallium column chemistry and subsequent measurement on a Neptune inductively coupled plasma mass spectrometer. Modeling of the thallium isotopes was done using a forward geochemical box model in the Stella modeling program. This was used to determine the changes in extent of oxic seafloor necessary to induce the resultant compiled thallium isotope record from the aforementioned sections.
    Keywords: Canada; Japan; Mass extinction; Permian; shale; thallium isotopes; Triassic
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 3
    Publication Date: 2024-04-20
    Keywords: Canada; Japan; Mass extinction; Permian; shale; thallium isotopes; Triassic
    Type: Dataset
    Format: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 785.7 kBytes
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Molecular microbiology 25 (1997), S. 0 
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Ferric-binding proteins (FbpA) have been implicated in the transferrin receptor-mediated iron acquisition pathways of Haemophilus influenzae and Neisseria spp. These proteins are believed to function by shuttling iron from outer membrane transferrin receptors to a specific inner membrane permease complex. However, the role of these proteins has not been conclusively resolved, as attempts at creating isogenic mutants in the fbpA genes of both species have been unsuccessful, prompting the hypothesis that FbpA may play a critical role in H. influenzae and Neisseria spp. This study describes the construction and characterization of an H. influenzae isogenic fbpA mutant. It is demonstrated that this mutant is deficient in its ability to use human transferrin as a sole iron source, even though the strain is still competent for binding human transferrin. It is also demonstrated that this mutant is impaired in its ability to use ferric citrate as an iron source, and grows at a reduced rate relative to wild type in broth supplemented with protoporphyrin rather than haemin.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1442-9993
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract  Microdisturbance to seedlings is important because it can differentially affect the mortality and recruitment of seedlings of forest tree species and thereby ultimately affect community composition. Microdisturbance due to litterfall has been shown to vary greatly in its influence on seedling survival among and within forests, and yet there have been no previous studies that investigate the cause of these differences. In this study the influence of macro-litterfall on seedling damage is investigated in five complex temperate forests in New Zealand. Litterfall damage to artificial seedlings in these forests was strongly correlated with macro-leaf-fall (leaves 〉 30 cm × 1.5 cm) dry weight and total macro-litterfall (leaves and deadwood 〉 30 cm × 1.5 cm) surface area (R2 = 0.99, P 〈 0.005 for each). Protective vegetation within 2 m of the ground (mostly lianes and woody shrubs) reduced the risk of litterfall damage by up to 84%. Hitherto unexplained differences in litterfall damage to seedlings found among, and within, forests (tropical and temperate) may therefore be due to differences in rates of macro-leaf-fall and forest structure. These results are important because they suggest that subtle differences in forest structure, and species composition, may influence regeneration patterns through the litterfall microdisturbance regime.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1009
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 7
    Publication Date: 2017-01-20
    Description: During a zooplankton survey 350 km off the coast of Western Australia, we captured a large and robust zooid of a salp (Thetys vagina), to which six late stage larvae (phyllosomata) of the western rock lobster (Panulirus cygnus) were attached. High-throughput sequencing analyses of DNA extracts from midgut glands of the larvae confirmed that each phyllosoma had consumed mainly salp tissue ( x 1⁄4 64.5% + 15.9 of DNA reads). These results resolve long-standing conjecture whether spiny lobster phyllosomata attach to large gelatinous hosts to feed on them.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 8
    Publication Date: 2022-10-26
    Description: © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Farrell, U. C., Samawi, R., Anjanappa, S., Klykov, R., Adeboye, O. O., Agic, H., Ahm, A.-S. C., Boag, T. H., Bowyer, F., Brocks, J. J., Brunoir, T. N., Canfield, D. E., Chen, X., Cheng, M., Clarkson, M. O., Cole, D. B., Cordie, D. R., Crockford, P. W., Cui, H., Dahl, T. W., Mouro, L. D., Dewing, K., Dornbos, S. Q., Drabon, N., Dumoulin, J. A., Emmings, J. F., Endriga, C. R., Fraser, T. A., Gaines, R. R., Gaschnig, R. M., Gibson, T. M., Gilleaudeau, G. J., Gill, B. C., Goldberg, K., Guilbaud, R., Halverson, G. P., Hammarlund, E. U., Hantsoo, K. G., Henderson, M. A., Hodgskiss, M. S. W., Horner, Tristan J., Husson, J. M., Johnson, B., Kabanov, P., Brenhin K. C., Kimmig, J., Kipp, M. A., Knoll, A. H., Kreitsmann, T., Kunzmann, M., Kurzweil, F., LeRoy, M. A., Li, C., Lipp, A. G., Loydell, D. K., Lu, X., Macdonald, F. A., Magnall, J. M., Mänd, K., Mehra, A., Melchin, M. J., Miller, A. J., Mills, N. T., Mwinde, C. N., O'Connell, B., Och, L. M., Ossa Ossa, F., Pagès, A., Paiste, K., Partin, C. A., Peters, S. E., Petrov, P., Playter, T. L., Plaza-Torres, S., Porter, Susannah M., Poulton, S. W., Pruss, S. B., Richoz, S., Ritzer, S. R., Rooney, A. D., Sahoo, S. K., Schoepfer, S. D., Sclafani, J. A., Shen, Y., Shorttle, O., Slotznick, S. P., Smith, E. F., Spinks, S., Stockey, R. G., Strauss, J. V., Stüeken, E. E., Tecklenburg, S., Thomson, D., Tosca, N. J., Uhlein, G. J., Vizcaíno, M. N., Wang, H., White, T., Wilby, P. R., Woltz, C. R., Wood, R. A., Xiang, L., Yurchenko, I. A., Zhang, T., Planavsky, N. J., Lau, K. V., Johnston, D. T., Sperling, E. A., The Sedimentary Geochemistry and Paleoenvironments Project. Geobiology. 00, (2021): 1– 12,https://doi.org/10.1111/gbi.12462.
    Description: Geobiology explores how Earth's system has changed over the course of geologic history and how living organisms on this planet are impacted by or are indeed causing these changes. For decades, geologists, paleontologists, and geochemists have generated data to investigate these topics. Foundational efforts in sedimentary geochemistry utilized spreadsheets for data storage and analysis, suitable for several thousand samples, but not practical or scalable for larger, more complex datasets. As results have accumulated, researchers have increasingly gravitated toward larger compilations and statistical tools. New data frameworks have become necessary to handle larger sample sets and encourage more sophisticated or even standardized statistical analyses. In this paper, we describe the Sedimentary Geochemistry and Paleoenvironments Project (SGP; Figure 1), which is an open, community-oriented, database-driven research consortium. The goals of SGP are to (1) create a relational database tailored to the needs of the deep-time (millions to billions of years) sedimentary geochemical research community, including assembling and curating published and associated unpublished data; (2) create a website where data can be retrieved in a flexible way; and (3) build a collaborative consortium where researchers are incentivized to contribute data by giving them priority access and the opportunity to work on exciting questions in group papers. Finally, and more idealistically, the goal was to establish a culture of modern data management and data analysis in sedimentary geochemistry. Relative to many other fields, the main emphasis in our field has been on instrument measurement of sedimentary geochemical data rather than data analysis (compared with fields like ecology, for instance, where the post-experiment ANOVA (analysis of variance) is customary). Thus, the longer-term goal was to build a collaborative environment where geobiologists and geologists can work and learn together to assess changes in geochemical signatures through Earth history.
    Description: We thank the donors of The American Chemical Society Petroleum Research Fund for partial support of SGP website development (61017-ND2). EAS is funded by National Science Foundation grant (NSF) EAR-1922966. BGS authors (JE, PW) publish with permission of the Executive Director of the British Geological Survey, UKRI.
    Keywords: Consortium ; Database ; Earth history ; Geochemistry ; Website
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 9
    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Serra, M., Sathe, P., Rypina, I., Kirincich, A., Ross, S. D., Lermusiaux, P., Allen, A., Peacock, T., & Haller, G. Search and rescue at sea aided by hidden flow structures. Nature Communications, 11(1), (2020): 2525, doi:10.1038/s41467-020-16281-x.
    Description: Every year, hundreds of people die at sea because of vessel and airplane accidents. A key challenge in reducing the number of these fatalities is to make Search and Rescue (SAR) algorithms more efficient. Here, we address this challenge by uncovering hidden TRansient Attracting Profiles (TRAPs) in ocean-surface velocity data. Computable from a single velocity-field snapshot, TRAPs act as short-term attractors for all floating objects. In three different ocean field experiments, we show that TRAPs computed from measured as well as modeled velocities attract deployed drifters and manikins emulating people fallen in the water. TRAPs, which remain hidden to prior flow diagnostics, thus provide critical information for hazard responses, such as SAR and oil spill containment, and hence have the potential to save lives and limit environmental disasters.
    Description: We are grateful to Margaux Filippi, Michael Allshouse, Javier González-Rocha, Peter Nolan, Siavash Ameli, Patrick Haley Jr., and the MSEAS team for their contribution in the field experiments. We also acknowledge the NSF Hazard funding grant no. 1520825. S.D.R. acknowledges support from NSF grant no. 1821145. M.S. would like to acknowledge support from the Schmidt Science Fellowship (https://schmidtsciencefellows.org/). G.H. acknowledges support from the Turbulent Superstructures Program of the German National Science Foundation (DFG).
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 10
    Publication Date: 2024-01-12
    Description: We have identified two new species of Metrosideros subg. Mearnsia (Myrtaceae) growing on, and apparently endemic to, the massif known as the Roches d\xe2\x80\x99Oua\xc3\xaf\xc3\xa8me in New Caledonia. Of these two species, we include M. whitakeri in sect. Mearnsia and M. rotundifolia in sect. Calyptropelala. Both morphological assessments and phylogenetic analyses based on nrDNA sequence variation produced congruent interpretations of the novelty of the new species and of their classification.
    Keywords: ITS ; Metrosideros ; Mearnsia ; Myrtaceae ; nuclear rDNA
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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