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Artigos de revistas sobre o assunto "Coraux massifs"
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Denayer, Julien, e Izzet Hoşgör. "First report of Devonian corals from the Bitlis-Pötürge Massif (SE Turkey): a rare occurrence of corals on the northern margin of Gondwana". Geologica Acta 19 (28 de janeiro de 2021): 1–11. http://dx.doi.org/10.1344/geologicaacta2021.19.1.
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The Bitlis-Pötürge Massif of SE Turkey is a metamorphic belt separating the Arabian Plate from the Taurides. It includes a non-metamorphic Palaeozoic sequence that contains locally fossiliferous strata. Here is reported for the first time an assemblage of Upper Devonian rugose and tabulate corals from the Meydan Formation, composed of the rugose Frechastraea schafferi (PENECKE), Peneckiella cf. teicherti HILL, Pseudopexiphyllum supradevonicum (PENECKE), and Macgeea desioi VON SCHOUPPÉ, and the tabulate Thamnopora reticulata (DE BLAINVILLE), Alveolites ex. gr. suborbicularis and Scoliopora sp. The rugose corals suggest a Late Frasnian age. The palaeobiogeographic affinities of corals are discussed. The species F. schafferi and the genus Pseudopexiphyllum –so far only reported from Turkey, Iran and Afghanistan– are probably limited to the northern margin of Gondwana and therefore diagnostic for this palaeogeographic area. Until now, the northern margin of Gondwana yielded very few Upper Devonian corals so this occurrence in SE Turkey is particularly important to estimate the relationship between these corals and the ones from the northern margin of the Palaeotethys Ocean.
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Wright, Anthony J., Yves Plusquellec e Rémy Gourvennec. "Devonian operculate corals (Calceolidae, Cnidaria) from the Massif Armoricain, France". Alcheringa: An Australasian Journal of Palaeontology 40, n.º 3 (15 de fevereiro de 2016): 313–40. http://dx.doi.org/10.1080/03115518.2016.1132866.
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Kossovaya, Olga Leonidovna, e Elena Ivanovna Kulagina. "Пермские кораллы из рифовых массивов в районе г. Стерлитамака (PERMIAN CORALS FROM REEF MASSIFS IN THE STERLITAMAK AREA)". Geologicheskii vestnik, n.º 2 (14 de julho de 2023): 66–84. http://dx.doi.org/10.31084/2619-0087/2023-2-5.
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История изучения кораллов из Стерлитамакских шиханов началась в середине 19 века. Новый подъем исследований в 30–40 годы 20 века был связан с открытием башкирской нефти. Кораллы пермских рифов представлены одиночными и колониальным формами и чрезвычайно разнообразны. Предшествующие исследования позволяют определять возрастной интервал видов и на этой основе выделить несколько разновозрастных комплексов. Для ассельской части характерны редкие колониальные Protowentzelella и Kleopatrina. Одиночные амплексокаринии и каниноидные кораллы встречаются в ассельской части Куштау, Тратау, Шахтау. Разнообразие астреоидных форм увеличивается в верхней части тастубского горизонта. Таксономически наиболее разнообразен тастубский комплекс шихана Юрактау, в составе которого определены цериоидные и астреоидные формы. Получена характеристика местонахождений «на коралловой тропе» и в юго-западной части массива, причем в последнем астреоидные кораллы преобладают. Впервые обнаружены кораллы на шихане Куштау. По сохранности колоний и их таксономи- ческому разнообразию местонахождение кораллов в шихане Юрактау является уникальным, представляя «музей под открытым небом», сравнимый по сохранности с Большим барьерным рифом Австралии.
The history of the coral research in Sterlitamak shikhans began in the middle of the 19th century. A new rise in investigation in the 30–40 years of the 20th century was triggered by the discovery of the Bashkirian oil. The coral assemblage of the Permian reef is represented by solitary and colonial forms and is extremely diverse. The preceding studies allow the determination of the species age-range and distinguish several assemblages of different age. The Asselian part is characterized by rare colonial Protowentzelella and Kleopatrina. Solitary Amplexocarinia and caninoid corals are also found in the Asselian deposits of Kushtau, Toratau, and Shakhtau. The variety of asteroid colonies increases in the upper part of the Tastubian horizon (Sakmarian). Taxonomically, the Tastubian assemblage of Yuraktau Shikhan is the most diverse; its composition includes cerioid and astreoid forms. Locations «on the coral path» and in the southwestern part of the massif have been sampled and studied. In the second occurrence, the astreoid corals prevail. Corals were first discovered in Kushtau shikhan. According to the preservation of the colonial corals and their taxonomic diversity, the assemblage of Yuraktau Shikhan is unique, representing an «open-air museum», comparable to the modern Australian barrier reef.
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Bohatý, Jan, William I. Ausich, Elise Nardin, Christian Nyhuis e Stefan Schröder. "Coral-crinoid biocoenosis and resulting trace fossils from the Middle Devonian of the Eifel Synclines (Rhenish Massif, Germany)". Journal of Paleontology 86, n.º 2 (março de 2012): 282–301. http://dx.doi.org/10.1666/11-007.1.
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Fossil echinoderms are a rich source of information concerning biotic interactions. In this study we analyzed the premortem encrustation of the highly specialized Middle Devonian rugose coralsAspasmophyllum crinophilumand ?“Adradosia” sp. on camerate crinoid stems.Aspasmophylluminfested living crinoid stems by sclerenchymal outgrowth that formed a skeletal ring but ?“Adradosia” sp. encrusted the stems rapidly, without building a ring. These coral-crinoid biocoenoses indicate a settlement advantage for the rugose corals within densely populated communities of the lower Givetian. The corals could be interpreted as large epizoozoans that benefited as secondary tierers reaching relatively high tiering levels. It also suggests the ability for the affected crinoids to repel the coral by overgrowing the corallite with a local increased stereomic growth. Because the crinoid axial canals are not penetrated, the corals cannot be considered as predators or parasites of crinoids. Therefore, the described biocoenosis is interpreted as commensalism. The speciesA. crinophilumis redescribed, and a neotype is defined, because of the loss of the initial types. Two types of ichnofossils can be attributed to the premortem encrustation of both corals. They are described asOstiocavichnusn. ichnogen. and are attributed to the stereomic response of the infested hosts. These swellings are characterized as either elliptical (Ostiocavichnus ovalisn. ichnogen. n. ichnosp. due to the assumed reaction ofA. crinophilum) or subcircular concavities (O. rotundatusn. ichnogen. n. ichnosp. due to the reaction of ?“Adradosiasp.”).
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McLean, Ross A. "Frasnian rugose corals of western Canada Part 3A: The massive Phillipsastreidae Phillipsastrea, Chuanbeiphyllum". Palaeontographica Abteilung A 230, n.º 1-3 (31 de janeiro de 1994): 39–76. http://dx.doi.org/10.1127/pala/230/1994/39.
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McLean, Ross A. "Frasnian rugose corals of western Canada Part 3B: The massive Phillipsastreidae - Pachyphyllum, Smithicyathus, Frechastraea". Palaeontographica Abteilung A 230, n.º 4-6 (19 de abril de 1994): 77–96. http://dx.doi.org/10.1127/pala/230/1994/77.
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Motai, Satoko, Jun Kawano, Takaya Nagai, Kohki Sowa e Tsuyoshi Watanabe. "Precipitation of halite during calcification of the massive reef-building coral Porites lobata". European Journal of Mineralogy 28, n.º 2 (25 de maio de 2016): 265–71. http://dx.doi.org/10.1127/ejm/2016/0028-2521.
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Kossovaya, Olga L., e Dieter Weyer. "Lopingian corals from the Omolon Massif (Eastern Siberia), the northernmost Permian boreal Rugosa community". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 287, n.º 2 (1 de fevereiro de 2018): 167–94. http://dx.doi.org/10.1127/njgpa/2018/0711.
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Lütte, Bernd-Peter, e Klernens Oekentorp. "Rugose corals from the Cürten-Formation (Givetian) of the Sötenich syncline (Rhenish Massif, North-Eifel)". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 176, n.º 2 (15 de abril de 1988): 213–43. http://dx.doi.org/10.1127/njgpa/176/1988/213.
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Aretz, Markus. "Rugose corals from the upper Viséan (Carboniferous) of the Jerada Massif (NE Morocco): taxonomy, biostratigraphy, facies and palaeobiogeography". Paläontologische Zeitschrift 84, n.º 3 (25 de novembro de 2009): 323–44. http://dx.doi.org/10.1007/s12542-009-0046-0.
Texto completo da fonteTeses / dissertações sobre o assunto "Coraux massifs"
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Canesi, Marine. "Impacts des changements globaux sur les coraux massifs Porites et Diploastrea de l’océan Pacifique". Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASJ007.
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Les coraux tropicaux sont des archives naturelles qui permettent d’une part, de reconstruire la variabilité océanique et, d’autre part, d’évaluer les impacts du réchauffement climatique et de l’acidification des océans sur ces organismes calcifiants.À partir d'un jeu de données unique issu de 40 colonies de corail massif couvrant l’ensemble de l'Océan Pacifique, de nouvelles calibrations de température ont été développées via l’analyse géochimique élémentaire de leur squelette pour la période 2010-2016. Ainsi, l’utilisation de l’approche « multi-traceurs » couplant Sr/Ca-Li/Mg permet de réduire les incertitudes de reconstruction des températures à ± 0,87 °C. Grâce à cela, deux séries temporelles de température dérivées de colonies de Porites et de Diploastrea de Palaos (Micronésie) ont été comparées. Celles-ci révèlent une discordance marquée des variations temporelles selon le traceur utilisé ou le genre étudié et donc, la nécessité de mieux comprendre les processus de bio-minéralisation. Pour cela, l'analyse géochimique (B/Ca et δ11B) de squelettes coralliens a été réalisée afin de reconstruire les propriétés chimiques des carbonates au sein du fluide de calcification (cf).Ce travail doctoral met en évidence la capacité des coraux massifs à réguler la chimie des carbonates de leur cf avec, pour Porites une hausse du pHcf (~ 8,41) à la fois sur un site témoin (pHsw ~ 8,03) et sur un site naturellement acide de Palaos (pHsw ~ 7,85), favorisant ainsi le processus de calcification.À l’échelle du bassin Pacifique, il en résulte que la température conjointement à la chimie des carbonates de l’eau de mer (pHsw, DICsw et Ωsw) pilotent cette régulation interne ainsi que les paramètres de croissance. Parmi eux, la densité du squelette des Porites diminue de 14 % en condition acide, ce qui pourrait à terme, les rendre plus vulnérables.En revanche, la régulation interne du genre Diploastrea semble plus sensible au réchauffement de l'océan et mérite donc une attention particulière dans les études futures afin d’évaluer leur capacité à supporter ce réchauffement conjugué à l'acidification des océansTropical corals provide natural archives to reconstruct oceanic variability and evaluate the impacts of global warming and ocean acidification on these calcifying organisms.From a unique dataset of 40 massive coral colonies across the Pacific Ocean, I developed temperature calibrations via elemental geochemical analysis of their skeletons for the period 2010-2016. The use of a "multi-proxy" approach coupling Sr/Ca-Li/Mg reduces the reconstructed temperature uncertainties to ± 0.87 °C. Thereby, two temperature time series derived from Porites and Diploastrea colonies from Palau (Micronesia) were reconstructed and compared. These reveal a substantial discrepancy in temporal variations by proxy or genus of interest and hence, the need to better understand bio-mineralization processes. With this aim, I analysed the B/Ca and δ11B of the coral skeletons in order to determine the carbonate system properties of the calcifying fluid (cf).My results highlight the ability of massive corals to regulate the carbonate chemistry of their cf with, for Porites, an increase in pHcf (~ 8.41) both at a control site (pHsw ~ 8.03) and at a naturally acidic site in Palau (pHsw ~ 7.85), promoting the calcification process.At the Pacific Ocean level, it emerges that temperature together with seawater carbonate chemistry (pHsw, DICsw and Ωsw) influence this internal regulation as well as the growth parameters. In particular, the skeletal density of Porites decreases by 14% under acidic conditions, which might ultimately lead to a greater vulnerability to further damages.In contrast, internal regulation of the genus Diploastrea is more likely to be sensitive to ocean warming and therefore, deserve forefront attention in the future studies to assess their ability to endure increasing global ocean warming and acidification
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Moreau, Melanie. "Variabilité climatique centre/est Pacifique au cours du dernier millénaire reconstruite à partir d’analyses géochimiques sur des coraux massifs". Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0213/document.
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L’océan Pacifique est le siège de variabilités climatiques interannuel et multi-décennale, El Niño Southern Oscillation (ENSO) et la Pacific Decadal Oscillation (PDO), dont les répercussions (via des téléconnections) peuvent être mondiales. Des impacts importants sur les populations, les activités socio-économiques et sur l’environnement ont été attribuées à ENSO. Il est alors primordial d’améliorer notre compréhension de la dynamique Pacifique et notamment du phénomène ENSO ainsique son évolution sous l’effet du changement climatique.Les mesures géochimiques (Sr/Ca et 818O) réalisées sur les coraux constituent des enregistrements paléoclimatiques de choix pour l’étude de l’évolution d’ENSO et sont essentielles pour mettre en perspective la dynamique actuelle du climat par rapport à sa dynamique passée. Après avoir évaluer la robustesse du paléothermomètre géochimique corallien (Sr/Ca), cette thèse a permis la reconstruction de température de surface océanique (SST) à partir de coraux de l’atoll de Clipperton (Pacifique tropical Est) et de l’archipel des Marquises (Pacifique tropical centre) couvrantplusieurs parties du dernier millénaire. Nos résultats suggèrent que la structure spatiale d’ENSO étaitplutôt stable au cours des deux derniers siècles, montrant majoritairement une structure de type ENSOcanonique (Est Pacifique) par opposition à l’ENSO Modoki (centre Pacifique). Bien qu’encore débattue, cette structure spatiale pourrait avoir évoluée très récemment, en liaison avec le changement climatique global (et cela pourrait continuer dans le futur). A l’échelle décennale, nos deux zones d’étude (centre et Est Pacifique) sont influencées par la PDO.Les résultats de cette thèse tendent également à suggérer que l’activité d’ENSO actuelle (sous l’effet du forçage anthropique) n’est pas atypique à l’échelle du dernier millénaire. En effet, son intensité et sa fréquence étaient plus fortes au début du petit âge glaciaire (LIA, 16ème siècle). La comparaison deces résultats avec un ensemble de simulations climatiques (PMIP3) montre que la variabilité ENSO estbien reproduite par ces modèles climatiques mais qu’ils échouent à reproduire correctement l’état moyen des températures du PacifiqueThe Pacific Ocean is the place of interannual and multi-decadal climate variabilities, namely the El Niño Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO). There can have globals impacts via teleconnections. Major impacts on populations, economic and environmental activitieshave been attributed to ENSO. It is therefore essential to improve our understanding of the Pacificdynamic, particularly ENSO activity and its evolution under recent climate change.Geochemical measurements (Sr/Ca and 818O) performed on corals are relevant paleoclimatic records for studying the evolution of ENSO and are essential to put into perspective the current climatedynamic in comparison to past climate.After an evaluation of the robustness of the coral geochemical paleothermometer (Sr/Ca), we present the reconstruction of sea surface temperature (SST) from Eastern tropical Pacific coral (Clippertonatoll) and central tropical Pacific coral (Marquesas archipelago) covering several parts of the last millennium. Our results suggest that ENSO spatial pattern was relatively stable over the past two centuries, mainly indicating an eastern Pacific ENSO pattern (canonical) in comparison to the centralPacific ENSO (Modoki). Although still debated, this spatial pattern could have recently changed dueto global climate change (and this could continue in the future). At the decadal timescale, both studiedareas (central and eastern Pacific) are influenced by the PDO.The results of this Phd thesis also suggest that the present day ENSO activity (under the influence ofanthropogenic forcing) is not atypical throughout the last millennium. The intensity and frequency of ENSO were stronger in the early Little Ice Age (LIA, 16th century). These results are compared withan ensemble of climate simulations (PMIP3) and indicate that ENSO variability is correctly reproduced by numerical climate models but that these models fail to correctly reproduce the mean temperature state of the Pacific
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Ourbak, Timothée. "Variations climatiques interannuelles à interdécennales dans le Pacifique tropical telles qu'enregistrées par les traceurs géochimiques contenus dans les coraux massifs". Bordeaux 1, 2006. http://www.theses.fr/2006BOR13193.
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L'étude des paléoclimats tropicaux est importante pour cerner les variabilités climatiques liées au changement global et, à terme, l'augmentation de la capacité de prédiction climatique. A ce titre, les coraux massifs apparaissent comme d'excellents enregistreurs des climats marins tropicaux. Ainsi les variations du contenu géochimique des squelettes des coraux massifs varient corollairement à l'évolution des paramètres environnementaux. Ce travail met en évidence l'intérêt d'analyses couplées (isotopes stables δ18O et δ13C et éléments trace, Sr/Ca, U/Ca, Ba/Ca, Mg/Ca et Ba/Ca) pour comprendre entre autre la variabilité des températures et des salinités de surface de l'océan. Les méthodes existantes ainsi que celles développées dans le cadre de cette étude lors de la phase de calibration sont appliquées à deux sites d'étude situés dans le pacifique tropical Sud Ouest. Ainsi, plus de 500 ans d'enregistrement des températures et des salinités sont reconstruites en continu, montrant des variations de type interdécennales marquées, qui s'expliquent essentiellement par la courantologie des masses d'eaux au Sud de l'île de la Nouvelle Calédonie. De forts événements ENSO (El Niño Southern Oscillation) ont également été mis en évidence aux alentours de 1600. L'autre site d'étude, Wallis, d'interprétation plus complexe, semble présenter des variations liées aux modulations basse fréquence de la SPCZ (South Pacific Convergence Zone). Finalement, ces résultats sont remis en perspective dans un cadre plus général et une synthèse des différents outils offerts aux paléoclimatologues est produite, incorporant les résultats issus des présents travaux.
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Desenfant, Fabrice. "Traçage des circulations atmosphériques et océaniques en Atlantique Nord Subtropical à partir d'enregistrements géochimiques (Isoptopes du plomb et de l'oxygène) contenus dans le squelette des coraux massifs". Aix-Marseille 3, 2004. http://www.theses.fr/2004AIX30015.
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L'objectif de cette étude est de retracer les voies de distributions atmosphériques et océaniques du plomb au cours du 20ème siècle, en relation avec la variabilité climatique de l'Atlantique Subtropical Nord, à l'aide des archives coralliennes et des émissions anthropiques de plomb. Dans une première phase, l'impact des émissions atmosphériques américaines et européennes a été quantifié sur deux colonies coralliennes de la Mer des Carai͏̈bes (Ile de Mona et Ile de la Martinique) à partir des analyses du plomb et de ses isotopes stables par Spectrométrie de Masse à Thermo-Ionisation (TIMS). Les mesures réalisées indiquent que les archives coralliennes sont de bons enregistreurs des émissions anthropiques de plomb. La résolution annuelle obtenue, notamment sur la colonie de l'île de Mona, permet de retracer l'impact des émissions de plomb dans l'Atlantique Nord au cours du 20ème siècle. Cette résolution autorise l'accès aux cinétiques de transferts des aérosols à l'échelle du bassin. Par comparaison avec les profils réalisés sur différents sites (Bermudes, Floride, Barbade, Péninsule du Yucatan, Basin de Cariaco et Ile de Ste. Croix), il ressort que la distribution des aérosols dans l'Atlantique Subtropical est contrôlée par les paramètres météorologiques et réagit aux oscillations climatiques de l'Atlantique Nord (ONA). Du fait du temps de résidence très court du plomb dans l'atmosphère (moins de 10 jours), le décalage dans le temps d'événements marqués comme l'interdiction des essences plombées aux Etats Unis puis en Europe a conduit, à travailler également sur le compartiment océanique. Les anomalies océaniques déduites des enregistrements 18O sur les colonies coralliennes de Porto-Rico, de la Martinique et de la Guadeloupe peuvent en partie expliquer les déphasages observés. Les fluctuations océaniques saisonnières ont été établies et les variations interannuelles répondent à la fois aux ONA et aux perturbations climatiques de l'océan Pacifique (ENSO-PDO)The main purpose for this study is to reconstruct atmospheric and oceanic transport of pollutant lead in relation to climate variability in the subtropical North Atlantic during the XXth. Century. This shall be performed using geochemical coral records and anthropogenic lead emission archives. We did first quantify the relative impact of the main anthropogenic sources to Caribbean corals (Mona Island and Martinique) with lead and its stable isotope (low level analysis by thermal ionisation mass spectrometry). Data show the capacity of corals to faithfully record input from industrialized continental sources (Northern and Central America, Western Europe) as well as meteorological events such as hurricanes. This high resolution study evidence the role of climate oscillations such as the NAO on the distribution of continental pollutants into oceanic surface waters. Discrepancies between the transient pollutant lead emission and its record inot corals from different locations in the Western North Atlantic did strongly suggest a significant control of oceanic circulation on lead distribution. Surface Seawater Temperature anomalies as recorded by 18O do evidence the seasonal impact of the Pacific meteorological indices (ENSO-PDO) on the North Atlantic circulation
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Alaguarda, Diego. "Effects of global changes on microbioeroding communities living in massive corals from the Western Indian Ocean over long term". Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS237.
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Les récifs coralliens sont de plus en plus menacés par les changements globaux qui affectent à la fois les processus d’accrétion et d’érosion. Parmi ces processus, la bioérosion récifale est un processus de dégradation naturelle majeur résultant de l’action de divers organismes sur et dans les substrats carbonatés. Depuis peu, une attention particulière est portée sur la meilleure compréhension des rôles joués par les microflores bioérodantes (ou perforantes) comprenant des cyanobactéries, microalgues et fungi, dans le fonctionnement des récifs coralliens, et notamment le bilan carbonaté du fait de leur rôle important dans la dissolution récifale des carbonates morts à court terme (jour, mois, année). La présente thèse avait donc pour objectif principal d’étudier les effets de certains facteurs environnementaux, dont le réchauffement et l’acidification des océans à long terme (décennie) sur à la fois la composition, la distribution et l’abondance de communautés microperforantes récifales. Etant donné que des expériences à long terme avec des coraux morts sont peu envisageables, plusieurs carottes coralliennes issues de deux genres coralliens massifs (Diploastrea sp. et Porites sp.) à croissance lente, ont été collectés le long du Canal du Mozambique et en particulier à Mayotte, permettant de couvrir les dernières décennies (30 à 50 ans). Ces coraux massifs sont connus pour être de véritables bioarchives géologiques largement colonisées par les microflores perforantes qui, en dissolvant le CaCO3, créent des galeries. Pour étudier la dynamique des microflores perforantes dans les deux genres coralliens ciblés, deux méthodes innovantes ont été développées: le machine learning pour analyser rapidement et précisément des milliers d’images de galeries microperforantes prises au Microscope Électronique à Balayage (MEB) le long de trois transects verticaux parallèle à l’axe principal de croissance du corail, et l’étude de biomarqueurs lipidiques le long d’une carotte corallienne (Diploastrea sp.). La méthode du machine learning basée sur un model CNN a d’abord été développée sur le corail Diploastrea sp. avec une précision de 93%, puis adaptée au Porites sp. en modifiant notamment un hyperparamètre (précision de 95%). L’approche géochimique a consisté à tenter d’identifier des marqueurs lipidiques spécifiques de la microalgue Ostreobium sp. et du corail Diploastrea sp. au cours des dernières décennies. Les résultats ont montré que l’abondance des galeries microperforantes est 3 à 4 fois plus importante dans le corail Diploastrea sp. que dans le Porites sp. et qu’elle a diminué quelque soit le genre corallien, au cours des dernières décennies. Chez Diploastrea sp., la diminutation est de 90% en 54 ans et est couplée à un changement très important dans la composition des communautés entre 1985-1986. La densité (bulk) du Diploastrea sp. a également chuté de manière significative les 5 dernières décennies. Des régressions logistiques ont montré que la température, la vitesse des vents, le pH interne du corail, plus ou moins couplés, sont correlés à l’abondance des traces microperforantes. L’approche géochimique a également mis en évidence la diminution importante d’un biomarqueur lipidique, les amides, au cours des dernières décennies. Bien qu’il soit difficile d’attribuer les amides à un taxon ou une espèce en particulier présente dans le squelette corallien, j’émets l’hypothèse que potentiellement ces dernières pourrait refléter la présence de communautés microperforantes. Pour confirmer ou infirmer les tendances observées, il est nécessaire d’étudier un plus large nombre de carottes coralliennes sur un temps plus long. En outre, d’autres facteurs pourraient être étudiés pour mieux comprendre la diminution de l’abondance des communautés microperforantes et son implication dans la santé et la résilience des coraux, tels que les métaux traces ou d’autres variables du système des carbonatesCoral reefs are increasingly threatened by global changes as they affect both accretion and erosion processes. Among these processes, reef bioerosion is a major natural process of degradation resulting from the action of various organisms on and in carbonate substrates. Recently, a particular attention has been given to the roles played by bioeroding (or perforating) microflora, which include cyanobacteria, microalgae, and fungi, in the functioning of coral reefs, especially in the carbonate budget, because of their important role in the dissolution of dead carbonates over short term (day, month, year). The thesis's main objective was thus to study the effects of global change factors such as ocean warming and acidification, on the composition, distribution, and abundance of reef microbioeroding communities over long term. Since long-term experiments with dead corals are difficult to carry out, several coral cores from two slow-growing massive coral genera (Diploastrea sp. and Porites sp.) were collected along the Mozambique Channel, particularly in Mayotte. Those cores covered the last decades (30 to 50 years). Such massive corals are known to be natural geological archives largely colonized by microbioeroding communities which leave traces while dissolving CaCO3. To study the dynamics of microbioeroding communities in the two targeted coral genera, two innovative methods were developed: a machine learning approach to quickly and accurately analyze thousands of Scanning Electron Microscope pictures of microbioeroding traces along three vertical transects parallel to the main coral growth axis, and a lipid biomarkers approach along a coral core of Diploastrea sp.. The machine learning method based on a CNN model was first developed on the coral Diploastrea sp. with an accuracy of 93%. It was then adapted to Porites sp. by modifying a hyperparameter (95% accuracy). The geochemical approach tried identifying specific lipid markers of the boring microalga Ostreobium sp. and the coral Diploastrea sp. during the last decades. The results showed that the abundance of microbioeroding traces is 3 to 4 times higher in the coral Diploastrea sp. than in Porites sp and has decreased in both coral genera over the last decades. In Diploastrea sp., the decrease was 90% over the last 54 years and was coupled with a very important change in community composition between 1985-1986. The density (bulk) of Diploastrea sp. has also dropped significantly over the last 5 decades. Logistic regressions showed that temperature, wind speed, and internal pH of the coral, more or less coupled, are correlated to the abundance of microbioeroding traces. The geochemical approach also highlighted a significant decrease of a lipid biomarker group, the amides, over the last decades. Although it is difficult to attribute amides to a specific taxon or species in the coral skeleton, I hypothesize that they could potentially reflect the presence of microbioeroding communities. To confirm or refute the observed trends, there is a need to study more coral cores, from different areas, and over a longer period. In addition, other factors should be studied to understand better the decrease in the abundance of microbioeroding communities and its implication in coral health and resilience, such as trace metals and other variables of the carbonate system
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Séré, Mathieu. "Identification of a primary pathogen involved in white patch syndrome, a newly-reported disease affecting the massive coral Porites lutea in the Western Indian Ocean". Thesis, La Réunion, 2014. http://www.theses.fr/2014LARE0024/document.
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Cette étude a pour but d'identifier les principales maladies coralliennes, de quantifier leurs prévalences sur les récifs de la Réunion, d'Afrique du Sud et de Mayotte et de déterminer leurs variations spatiales et saisonnières. Les résultats ont révélé la présence de six grands types de maladies coralliennes. Les prévalences totales moyennes des maladies ont été plus élevées à la Réunion (7.5 ± 2.2%) qu'en Afrique du Sud (3.9 ± 0.8%) et qu'à Mayotte (2.7 ± 0.3%). Les genres coralliens Acropora et Porites ont été les plus vulnérables aux maladies dans les trois régions étudiées. Des variations spatiales et saisonnières ont été détectées pour la maladie de la bande noire (BBD) et les syndromes blancs (WS) à la fois à la Réunion et en Afrique du Sud avec des prévalences plus élevées sur les récifs peu profonds et pendant la saison chaude. Ce travail a également pour but de caractériser deux maladies non décrites à ce jour : le syndrome des patches blancs (PWPS) et le syndrome du patch noir (PBPS) chez Porites. PWPS, observé à fois à la Réunion, en Afrique du Sud et à Mayotte est caractérisé par d'importantes fragmentations tissulaires généralement associées à des corps ovoïdes basophiles ressemblant à des agrégats bactériens. L'analyse bactérienne a révélé une grande variabilité entre les tissus infectés et sains. L'identification des pathogènes responsables de PWPS a également été réalisée en laboratoire. Sur les 14 souches bactériennes sélectionnées et testées, seule la P180R, génétiquement proche de Vibrio tubiashii a généré des signes de PWPS. Pour finir, PBPS, une forme atypique de BBD a été observée sur les récifs de la Réunion. Les suivis réalisés ont montré des variations spatiales et saisonnières avec des prévalences plus élevées sur le platier et pendant l'été. L'histologie a mis en évidence la présence de cyanobactéries et de corps basophiles dans les tissus infectés du corail. L'analyse génétique a révélé la présence d'une plus grande diversité de taxons dans les tissus infectés par PBPS que dans les tissus sains représentés par le genre VibrioDuring the past two decades, the emergence and spread of infectious diseases have caused substantial declines in the biodiversity and abundance of reef-building corals. Despite their increased global prevalence and virulence, little is known about coral diseases on Indian Ocean coral reefs. This study aims to fill this gap in knowledge by identifying the main coral diseases and quantify their prevalence at three localities Reunion, South Africa and Mayotte, determining their spatial distribution and seasonal variation. Principal findings of this study demonstrated the presence of six main coral diseases including black band disease (BBD), white syndromes (WS), pink line syndrome (PLS), growth anomalies (GA), skeleton eroding band (SEB) and Porites white patch syndrome (PWPS). The overall disease prevalence was higher in Reunion (7.5 ± 2.2%; mean ± SE) compared to South Africa (3.9 ± 0.8%; mean ± SE) and Mayotte (2.7 ± 0.3%; mean ± SE). Acropora and Porites were the genera most vulnerable to disease. Spatial variability was detected in both Reunion and South Africa with BBD and WS more prevalent on shallow than deep reefs. There was also evidence of seasonality in two diseases: BBD and WS, their prevalence being higher in summer than winter. Corals exhibiting signs of PWPS revealed extensive tissue fragmentation, generally associated with ovoid basophilic bodies resembling bacterial aggregates within the mesoglea of the body wall. Other organisms, including Cyanobacteria, Nematoda, Ciliata and endophytic algae, were also observed on diseased tissues and were generally associated with the dead epidermis and cell debris. Results of 16S rRNA sequence analysis revealed a high variability between bacterial communities associated with PWPS-infected and healthy tissues in Porites lutea. Several bacterial ribotypes affiliated to potential putative pathogens notably Shimia marina and Vibrio hepatarius were consistently found among the 16S rRNA sequences derived from the PWPS lesions, and absent and/or poorly represented in HT. Primary pathogens involved in the PWPS were also investigated in this study using traditional culturing techniques and laboratory infection trials. Of the 14 isolates selected for the inoculation trials, only the bacterial strain P180R mostly phylogenetically closely related8 to Vibrio tubiashii with its closest known sister taxon, V. hepatarius, was shown to cause signs resembling those of PWPS and satisfied the four Henle-Koch’s postulates. P180R displayed focalised and progressive tissue paling 12 h after inoculation and visible lesions of PWPS were observed 12 h thereafter. Signs of PWPS appeared on 90% of the exposed coral fragments (27 of 30) under controlled environmental conditions. Moreover, the virulence of this marine pathogen was tested and seemed to be strongly dependent on seawater temperature, resulting in significantly higher tissue loss at 30°C than 28°C and 26°C. Finally, a multidisciplinary approach involving field surveys, gross lesion monitoring, histopathology and 454-pyrosequencing was investigated to characterize an atypical form of BBD named PBPS. Histology revealed cyanobacterial penetration of the compromised tissue as well as the presence of basophilic bodies resembling bacterial aggregates in the living tissue, adjacent to the bacterial mat. Bacterial 16S rRNA sequences yielded a broader diversity of bacterial taxa in PBPS-infected tissues than in healthy tissue, represented by the genus Vibrio (24.9%), followed by sulfate-reducers or sulfide-oxidizers such as Desulfovibrio (20%), Clostridium (12.9%) and Arcobacter (9.9%). PBPS appears to be a multi-stage disease triggered by cyanobacterial invasion and resulting in secondary infections by environmental bacteria that grow in mucus-like decomposing tissue
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Zayasu, Yuna. "The cospeciation between massive corals and gall crabs". 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188516.
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Nicolas, Jean Vincent Arnaud. "Historical climate variability reconstructed from massive coral records in the western Indian Ocean". Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/9811.
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Includes bibliographical references.Coral δ¹⁸O and Sr/Ca records from massive corals in the western Indian Ocean (WIO) are used to establish the heterogeneous distribution of warming rates across the tropical and subtropical regions and to investigate if it corresponds with that from instrumental sea surface temperatures (SSTs). The coral records correlate with instrumental data better on monthly time scales compared to annual time scales. Coral thermal stress was assessed by the Degree Heating Months (DHM) technique and even though the coral DHM aligns quite well with instrumental DHM, the values from coral data are generally 2-3 times greater in magnitude than the DHM values from instrumental data. It was found that the accumulated thermal stress, calculated from coral and instrumental data, for the majority of the tropical and subtropical WIO sites has been increasing since the 1970’s. From 1870 to 1995, both the tropics and the subtropics have been warming in general, although with different and varying rates as recorded by the coral and the instrumental SSTs. It was further revealed that both the tropical and the subtropical WIO warmed during the summer and winter periods during 1870-1995. On longer time scales, the relationship between the coral records in the WIO and climate indices showed a significant interannual variability approximately centered at periods 3-6 years, indicating a probable link with ENSO and IOD. The extent to which coral reefs from different sites in the WIO are prepared to survive climate change based on historical SST variability and intensity of warming rates are described. It could therefore be suggested that some corals may be more favoured to survive warming climate compared to others because corals in the WIO are located in different oceanographic conditions and experience different climatic variations.
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Schinazi, Robert Glen. "Designing Massive 3-Dimensional Neural Networks with Chromosomal-Based Simulated Development". Diss., Virginia Tech, 1995. http://hdl.handle.net/10919/30531.
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A technique for designing and optimizing the next generation of smart process controllers has been developed in this dissertation. The literature review indicated that neural networks held the most promise for this application, yet fundamental limitations have prevented their introduction to commercial settings thus far. This fundamental limitation has been overcome through the enhancement of neural network theory.
The approach taken in this research was to produce highly intelligent process control systems by accurately modeling the nervous structures of higher biological organisms. The mammalian cerebral cortex was selected as the primary model since it is the only computational element capable of interpreting and complex patterns that develop over time. However the choice of the mammalian cerebral cortex as the model introduced two new levels of network complexity. First, the cerebral cortex is a three dimensional structure with extremely complicated patterns of interconnectivity. Second, the structure of the cerebral cortex can only be realized when thousands or millions of neurons are integrated into a massive scale neural network. The neural networks developed in this research were designed around the Hebbian adaptation, the only training technique proven by the literature review to be applicable to massive scale networks.
These design difficulties were resolved by not only modeling the cerebral cortex, but the process by which it develops and evolves in biological systems. To complete this model, an advanced genetic algorithm was produced, and a technique was developed to encode all functional and structural parameters that define the cerebral cortex into the artificial chromosome. The neural networks were designed by a cell growth simulation program that decoded the structural and functional information on the chromosome. The cell growth simulation program is capable of producing patterns of differentiation unique for any slight variations in the genetic parameters. These growth patterns are similar to patterns of cellular differentiation seen in biological systems. While the computational resources needed to implement a massive scale neural network are beyond that available in existing computer systems, the technique has produced output lists which fully define the interconnections and functional characteristic of the neurons, thereby laying the foundation for their future use in process control.Ph. D.
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Dubois-Dauphin, Quentin. "Restitution de l’hydrologie de l’Atlantique Nord-Est et de la Méditerranée occidentale depuis la dernière période glaciaire à partir de la composition isotopique du néodyme mesurée dans l’eau de mer et les coraux d’eau froide". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS114/document.
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L’objectif de cette thèse est d’apporter de nouvelles contraintes sur l’hydrologie de l’Atlantique Nord-Est et de la Méditerranée occidentale depuis la dernière période glaciaire à partir de l’analyse de la composition isotopique du Nd (εNd) dans des échantillons d’eau de mer ainsi que des coraux profonds et des foraminifères, prélevés dans des carottes sédimentaires marines. Les changements de l’hydrologie des masses d’eau intermédiaire (LIW, MSW, AAIW et masses d’eau intermédiaire des gyres subtropical et subpolaire) ont été plus particulièrement étudiés car leur rôle sur les transferts de sels en Atlantique Nord et in fine sur l’AMOC est actuellement mal contraint. Ce travail a été mené au cours des périodes de changements hydrologiques majeurs et abrupts de l’océan qui se sont produits lors des variations climatiques rapides de la dernière période glaciaire (événements d’Heinrich et cycles de Dansgaard-Oeschger) et lors du dépôt du Sapropel S1 en Méditerranée orientale. Dans un premier volet, nous avons amélioré la couverture spatiale des valeurs d’εNd des masses d’eau de l’Atlantique Nord-Est et de la mer d’Alboran, préalable indispensable pour restituer l’hydrologie passée de ces régions avec le traceur εNd. Nous avons ensuite mis en évidence un changement majeur du schéma de circulation de la Méditerranée occidentale durant la période de dépôt du sapropel S1, marquée par une forte réduction des masses d’eau de la Méditerranée orientale (LIW) au sud de la Sardaigne au profit de celles provenant du Golfe du Lion (WIW). Ce changement hydrologique ainsi que ceux qui s’opèrent en Méditerranée depuis la dernière période glaciaire ne sont pas associés à de fortes modifications des valeurs d’εNd de la LIW de la mer d’Alboran et de la mer des Baléares, suggérant une stabilité de la signature isotopique en Nd de la MOW au cours du temps. Ceci a permis, à partir d’un enregistrement d’εNd obtenus sur des coraux profonds du Golfe de Cadix, de mettre en évidence une contribution plus importante de l’AAIW plus radiogénique et donc une pénétration plus marquée en Atlantique Nord de cette masse d’eau lors des périodes de fortes réductions de l’AMOC, liées à la déstabilisation des calottes de glace de l’Hémisphère Nord: The purpose of this thesis is to constrain the hydrology of the North-East Atlantic and western Mediterranean Sea since the last glacial period from neodymium isotopic composition (εNd) measured on seawater, cold water corals and foraminifera. In particular, hydrological changes of intermediate water masses (LIW, AAIW, MSW, mid-subtropical and subpolar gyre water) have been studied as their role on salt budget in North Atlantic and ultimately on AMOC are currently poorly constrained. This work has been conducted at times of major and abrupt hydrological changes that occurred during rapid climatic variations of the last glacial period (Heinrich and Dansgaard-Oeschger events) and during the last sapropel deposit (S1) in eastern Mediterranean Sea. In a first step, we have improved the spatial distribution of water masses εNd values in North-east Atlantic and Alboran Sea, what is an absolute prerequisite in order to track past hydrological changes in these areas with εNd proxy. Next, we have highlighted a major change of the western Mediterranean circulation pattern during the sapropel S1 deposit, which is marked south of Sardinia by a strong reduction of eastern-sourced water masses (LIW) in favor of western-sourced water masses (WIW). This hydrological change as well as those occurring in Mediterranean Sea since the last glacial period was not associated with strong modifications of εNd values in Alboran and Balearic Sea, suggesting a stability of Nd isotopic signature of MOW over the time. This has highlighted, from an εNd record obtained on cold water corals in the Gulf of Cadiz, an enhanced contribution of more radiogenic AAIW and therefore a stronger northward penetration in North Atlantic at times of reduced AMOC linked to iceberg discharges from Northern Hemisphere ice sheets
Livros sobre o assunto "Coraux massifs"
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Uchimura, Masayuki. Etude de la croissance par sclérochronologie de coraux massifs (Porites lutea) d'un récif frangeant de Mayotte: Rapport de stage : diplôme d'études approfondies (D.E.A) "science de l'environnement marin", option "bioscience", sous option "océanologie biologique", septembre 1992. [Marseille, France]: Université d'Aix-Marseille II, Centre d'océanologie de Marseille, Station marine d'Endoume-Luminy, 1992.
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2
Braverman, Irus. Coral Whisperers. University of California Press, 2018. http://dx.doi.org/10.1525/california/9780520298842.001.0001.
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Coral Whisperers captures a key moment in the history of coral reef science and of environmental conservation at large. Drawing on more than one hundred interviews,the book documents the physical, intellectual, and emotional plight of coral scientists and their painstaking deliberations as they struggle to understand and save corals from what many of these scientistshave come to see as the corals’inevitable catastrophic future on a rapidly warming and otherwise assaulted planet.We are here in the thick of contemporary coral science, and we can feel its urgency: the experts, who are witnessing massive coral death around the planet, both grieve for this death and must simultaneously narrate it. Yet despite the desperate realities confronting corals in the Anthropocene, coral scientists have not given up hope. Through their engaging narratives, corals emerge as a sign, a measure, and a way out of the imminent catastrophe facinglife on earth.
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QUEVEDO, Massiel, e Massiel Quevedo. Corals Family Rose Garden by Massiel Quevedo: A Sweet Love Gardening Story! Independently Published, 2020.
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Anderson, James A. Cerebral Cortex. Oxford University Press, 2018. http://dx.doi.org/10.1093/acprof:oso/9780199357789.003.0011.
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There is important local processing in cortex as well as the more dramatic massive projections back and forth between cortical regions. Using short, slow, local connections eliminates many long, expensive, fast interregional connections. Cortical pyramidal cells connect to neighbors over several millimeters in the form of patchy connections. Connections are often reciprocal between patches. Groups of cells called cortical columns are ubiquitous in cortex and seem to be fundamental architectural units. A functional column is perhaps .3 mm in diameter containing perhaps 10,000 cells. Intrinsic imaging studies of columns in inferotemporal cortex show they respond selectively to complex aspects of images. A small number of columns respond to a complex object. In inferotemporal cortex, these responses might be “words” in a language of vision. There is evidence for scaling of computation from single units to cortical regions. Understanding the function of such ensembles is the future.
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Giangrande, Paul L. F. Haemoglobinopathies. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199550647.003.0005.
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♦ Haemoglobinopathies are commonly inherited disorders of haemoglobin synthesis♦ Thalassaemia is commonest around the Mediterranean countries and has skeletal manifestations due to massive marrow expansion with thinning of the cortex♦ Sickle cell crises occur in homozygotes and are a result of venous occlusion causing avascular necrosis. Infection and exposure to cold can sometimes precipitate these painful events♦ If surgery is needed blood cross-match must be carefully performed in advance, the theatre should be kept warm, and the hydration and acid/base balance of the patient monitored carefully.
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Mangeot, Mathieu, e Agnès Tutin, eds. Lexique(s) et genre(s) textuel(s) : approches sur corpus. Editions des archives contemporaines, 2020. http://dx.doi.org/10.17184/eac.9782813003454.
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Cet ouvrage collectif rassemble vingt-quatre contributions scientifiques sélectionnées parmi les présentations des onzièmes journées du réseau Lexicologie, Terminologie, Traduction. Ces journées intitulées « Lexique(s) et genre(s) textuel(s) : approches sur corpus » eurent lieu à Grenoble, France du 25 au 28 septembre 2018. Les études lexicales ont connu un profond renouveau depuis quelques années avec l'exploitation massive de corpus de données textuelles pour les études linguistiques. Ces approches ont à la fois renouvelé les méthodes de collecte des données, mais aussi les descriptions linguistiques, désormais davantage basées sur l'usage. L’accent de cette édition 2018 a été mis sur les méthodes de description des unités lexicales exploitant les corpus textuels. Le Réseau LTT: Présent et actif de longue date sur l’ensemble du continent africain, le réseau **Lexicologie, Terminologie, Traduction (LTT)** a été l’un des premiers réseaux de chercheurs de l’Agence universitaire de la Francophonie avant de devenir une association internationale qui poursuit les objectifs et les idéaux de ses fondateurs et continue à œuvrer en partenariat avec les acteurs de la Francophonie. Depuis plus de trente ans, le réseau LTT inscrit ses travaux au cœur de la problématique de la diversité linguistique et du plurilinguisme. Il fédère vingt-quatre centres de recherche implantés sur quatre continents (Amérique du Nord, Asie, Europe et Afrique) et rassemble plusieurs centaines de chercheurs issus d’un grand nombre de pays francophones, voire de territoires où le français est une langue seconde, sans statut officiel ni lien génétique ou historique avec les langues locales. Le site web du réseau LTT est accessible à cette adresse : https://reseau-ltt.net
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Chalupa, Leo M., e John S. Werner, eds. The Visual Neurosciences, 2-vol. set. The MIT Press, 2003. http://dx.doi.org/10.7551/mitpress/7131.001.0001.
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An essential reference book for visual science. Visual science is the model system for neuroscience, its findings relevant to all other areas. This massive collection of papers by leading researchers in the field will become an essential reference for researchers and students in visual neuroscience, and will be of importance to researchers and professionals in other disciplines, including molecular and cellular biology, cognitive science, ophthalmology, psychology, computer science, optometry, and education. Over 100 chapters cover the entire field of visual neuroscience, from its historical foundations to the latest research and findings in molecular mechanisms and network modeling. The book is organized by topic—different sections cover such subjects as the history of vision science; developmental processes; retinal mechanisms and processes; organization of visual pathways; subcortical processing; processing in the primary visual cortex; detection and sampling; brightness and color; form, shape, and object recognition; motion, depth, and spatial relationships; eye movements; attention and cognition; and theoretical and computational perspectives. The list of contributors includes leading international researchers in visual science. Bradford Books imprint
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Pearson, Trais. Sovereign Necropolis. Cornell University Press, 2020. http://dx.doi.org/10.7591/cornell/9781501740152.001.0001.
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By the 1890s, Siam (Thailand) was the last holdout against European imperialism in Southeast Asia. But the kingdom's exceptional status came with a substantial caveat: Bangkok, its bustling capital, was a port city that was subject to many of the same legal and fiscal constraints as other colonial treaty ports. This book offers new insight into turn-of-the-century Thai history by disinterring the forgotten stories of those who died “unnatural deaths” during this period and the work of the Siamese state to assert their rights in a pluralistic legal arena. The book documents the piecemeal introduction of new forms of legal and medical concern for the dead. It reveals that the investigation of unnatural death demanded testimony from diverse strata of society: from the unlettered masses to the king himself. These cases raised questions about how to handle the dead—were they spirits to be placated or legal subjects whose deaths demanded compensation?—as well as questions about jurisdiction, rights, and liability. Exhuming the history of imperial politics, transnational commerce, technology, and expertise, the book demonstrates how the state's response to global flows transformed the nature of legal subjectivity and politics in lasting ways. A compelling exploration of the troubling lives of the dead in a cosmopolitan treaty port, the book is a notable contribution to the growing corpus of studies in science, law, and society in the non-Western world.
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Boggs, Colleen Glenney. Patriotism by Proxy. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198863670.001.0001.
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Patriotism by Proxy develops a new understanding of the connections between American literature and American lives by focusing on a historic moment when the military transformed both. At the height of the Civil War in 1863, the Union instated the first-ever federal draft. Paired with the Emancipation Proclamation, the draft inaugurated new relationships between the nation and its citizens. A massive bureaucratic undertaking, the draft redefined the American people as a population. Equitable as the system was in theory, the draft laid bare social divisions, as wealthy draftees could hire substitutes to serve in their stead. A unique feature of the Civil War draft, substitutes reflect the transformation of how the state governed American life: the draft is the context in which American politics met and also transformed into a new kind of biopolitics. Replicating the core assumption of representative democracy that enables one person to stand in as a political proxy for another, the substitute took the place of the draftee and stood in uneasy relationship to the volunteer. Censorship and the suspension of habeas corpus prohibited free discussions over the draft’s significance, making literary devices and genres the primary means for deliberating over the changing meanings of political representation and citizenship. Assembling an extensive textual and visual archive, Patriotism by Proxy examines the draft as a cultural formation that operated at the nexus of political abstraction and embodied specificity, where the definition of national subjectivity was negotiated in the interstices of what it means to be a citizen-soldier.
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Di Cerbo, Cristiana, e Richard Jasnow. On the Path to the Place of Rest. Lockwood Press, 2022. http://dx.doi.org/10.5913/2022419.
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In this volume Christina Di Cerbo and Richard Jasnow publish 92 Demotic graffiti, along with several ostraca and mummy bandages, from Theban Tombs 11, 12, Tomb-399-, and environs recorded and studied under the aegis of the Spanish Mission at Dra Abu el-Naga directed by José Galán. These texts from the mid-second century BCE were inscribed on the tomb walls by workers of the Ibis and Falcon cult, who used the New Kingdom tombs as burial places for mummified birds dedicated to the gods Thoth and Horus. This varied corpus of texts includes not only votive formulae and lists of names, but, most unusually, labels for chambers and halls to guide the men depositing the mummies through the labyrinthine catacombs. The cult workers also recorded important burials and memorialized events of special significance, as when a massive conflagration broke out that consumed several mummies and damaged the tomb walls. The Missions conservators recovered many hitherto virtually invisible graffiti. Numerous inscriptions posed daunting epigraphic challenges; the text editors employed computer applications, especially DStretch, in order to enhance the digital images forming the basis for decipherment. In an introductory chapter Galán discusses the work of the Spanish Mission at Dra Abu Naga and recounts the complicated history of this important area of the Theban Necropolis down to the Roman period. The graffiti illustrate how New Kingdom tombs were reused for the sacred animal cult in the Ptolemaic period. Francisco Bosch-Puche and Salima Ikram contribute a detailed chapter analyzing the archaeological context of the graffiti and the material evidence for the animal cult in the site. The volume, a holistic study of this area at the twilight of Pharaonic history, represents a true collaboration between archaeologists and philologists.
Capítulos de livros sobre o assunto "Coraux massifs"
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Ekpenyong, Moses E., Aminu A. Suleiman e Murtala Salihu. "Towards Massive Parallel Corpus Creation for Hausa-to-English Machine Translation". In Current Issues in Descriptive Linguistics and Digital Humanities, 501–50. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2932-8_36.
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Fisher, Robert B., Kwang-Tsao Shao e Yun-Heh Chen-Burger. "Overview of the Fish4Knowledge Project". In Fish4Knowledge: Collecting and Analyzing Massive Coral Reef Fish Video Data, 1–17. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30208-9_1.
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Giordano, Daniela, Simone Palazzo e Concetto Spampinato. "Fish Tracking". In Fish4Knowledge: Collecting and Analyzing Massive Coral Reef Fish Video Data, 123–39. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30208-9_10.
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Huang, Phoenix X. "Hierarchical Classification System with Reject Option for Live Fish Recognition". In Fish4Knowledge: Collecting and Analyzing Massive Coral Reef Fish Video Data, 141–59. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30208-9_11.
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Beyan, Cigdem. "Fish Behavior Analysis". In Fish4Knowledge: Collecting and Analyzing Massive Coral Reef Fish Video Data, 161–79. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30208-9_12.
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Beauxis-Aussalet, Emma, e Lynda Hardman. "Understanding Uncertainty Issues in the Exploration of Fish Counts". In Fish4Knowledge: Collecting and Analyzing Massive Coral Reef Fish Video Data, 181–205. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30208-9_13.
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He, Jiyin, Concetto Spampinato, Bastiaan J. Boom e Isaak Kavasidis. "Data Groundtruthing and Crowdsourcing". In Fish4Knowledge: Collecting and Analyzing Massive Coral Reef Fish Video Data, 207–27. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30208-9_14.
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Boom, Bastiaan J. "Counting on Uncertainty: Obtaining Fish Counts from Machine Learning Decisions". In Fish4Knowledge: Collecting and Analyzing Massive Coral Reef Fish Video Data, 229–38. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30208-9_15.
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Fisher, Robert B. "Experiments with the Full Fish4Knowledge Dataset". In Fish4Knowledge: Collecting and Analyzing Massive Coral Reef Fish Video Data, 239–59. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30208-9_16.
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Chen-Burger, Yun-Heh, e Austin Tate. "The Fish4Knowledge Virtual World Gallery". In Fish4Knowledge: Collecting and Analyzing Massive Coral Reef Fish Video Data, 261–67. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30208-9_17.
Texto completo da fonteTrabalhos de conferências sobre o assunto "Coraux massifs"
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Al-Fetyani, Mohammad, Muhammad Al-Barham, Gheith Abandah, Adham Alsharkawi e Maha Dawas. "MASC: Massive Arabic Speech Corpus". In 2022 IEEE Spoken Language Technology Workshop (SLT). IEEE, 2023. http://dx.doi.org/10.1109/slt54892.2023.10022652.
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Gutiérrez-Fandiño, Asier, David Pérez-Fernández, Jordi Armengol-Estapé, David Griol e Zoraida Callejas. "esCorpius: A Massive Spanish Crawling Corpus". In IberSPEECH 2022. ISCA: ISCA, 2022. http://dx.doi.org/10.21437/iberspeech.2022-26.
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Ma, E. "Supersymmetry and Neutrino Masses". In Corfu Summer Institute on Elementary Particle Physics. Trieste, Italy: Sissa Medialab, 1999. http://dx.doi.org/10.22323/1.001.0047.
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Troeh, Sophia. "EFFECTIVE RESTORATION OF MASSIVE CORALS POST-STONY CORAL TISSUE LOSS DISEASE EPIDEMIC IN BISCAYNE NATIONAL PARK, FLORIDA". In GSA Connects 2023 Meeting in Pittsburgh, Pennsylvania. Geological Society of America, 2023. http://dx.doi.org/10.1130/abs/2023am-388613.
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Bergshoeff, Eric, Marija Kovacevic, Lorena Parra e Thomas Zojer. "A new road to massive gravity?" In Proceedings of the Corfu Summer Institute 2012. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.177.0053.
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Lola, S. "Neutrino Masses in SUSY theories". In Corfu Summer Institute on Elementary Particle Physics. Trieste, Italy: Sissa Medialab, 1999. http://dx.doi.org/10.22323/1.001.0059.
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Maharana, Jnanadeva. "T-duality of massive excited string states". In Proceedings of the Corfu Summer Institute 2011. Trieste, Italy: Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.155.0097.
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Elobaid, Elnaim, Bruno Welter Giraldes, Hamad Al-Kuwari, Jassim Al-Khayat, Fadhil Sadooni e Ekhlas Elbary. "Towards Sustainable Management of Coastal and Offshore Islands in Arabian Gulf Typology: Sensitivity Analysis, Ecological Risk Assessment of Halul and Al-Alyia Islands". In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2021. http://dx.doi.org/10.29117/quarfe.2021.0035.
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The great majority of marine ecosystems in Qatar are in fast decline and nearing collapse, where most ecosystem has lost the biological and economic functionality. Aiming to support the decision makers in the management and restoration strategies for recovering the biological and economic functionality of the ecosystems/natural resources of Qatar, we conducted 1) a typology mapping of the main components of the ecosystem of two islands, 2) a sensitivity and vulnerability assessment according to the known guidelines and standards. Highlighting the potential ecological risk and required recommendations for sustainable management plans, within the frame of Qatar National Vision 2030 (QNV 2030). The Islands present different anthropogenic pressure. As expected, Al Alyia the coastal Island is under real risk, with critical areas of sensibility but still presenting a potential for recovering its economy and ecological functionality, highlighting the collapsed stage of the very sensitive coral reefs, the vulnerability of oyster beds and seagrass and the functionality of the mangrove (expanding) and Sabha with massive birds nesting. The offshore Island Halul presented in the typology mapping the coral reefs as the main ecosystem but with the presence of seagrass, algae bed, sandy beach, and Sabha. The coral reef still presents a certain functionality, with corals covering several hard substrates, however with high sensitivity and high vulnerability, especially the coral in the shallow areas with scattered colonies, and the vulnerable nesting of marine turtles on beaches. As the management, we recommend increasing the restoration effort of targeted ecosystems, mainly involving coral reefs for increasing the marine biodiversity in general and restoring the oyster beds for recovering the filtration service. Strategies must be made for recovering the ecosystems’ functionality and restore the productivity of the Qatari fishing stock. We recommend applying this mapping method and sensitivity classification for all marine areas around Qatar for supporting the management plans.
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Schmidt-May, Angnis. "Modified Gravity: Nonlinear interactions for massive spin-2 fields". In Proceedings of the Corfu Summer Institute 2015. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.263.0157.
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Santamaria, Arcadi, Francisco del Aguila, Alberto Aparici, S. Bhattacharya e Jose Wudka. "Neutrinoless double b decay with small neutrino masses". In Proceedings of the Corfu Summer Institute 2012. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.177.0028.
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