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Статті в журналах з теми "Prealps"
1
Arlettaz, Raphaël, Guillaume Chapron, Marc Kéry, et al. "Poaching Threatens the Establishment of a Lynx Population, Highlighting the Need for a Centralized Judiciary Approach." Frontiers in Conservation Science 2 (June 7, 2021): 665000. https://doi.org/10.5281/zenodo.5206123.
Повний текст джерелаАнотація:
<strong>Abstract</strong> Illegal hunting represents a major threat to the conservation of predators, but its impact remains difficult to assess as there are strong incentives to conceal this criminal activity. Attributing declines of carnivores to poaching is therefore an important conservation challenge. We present a case study of the Eurasian lynx (<em>Lynx lynx</em>) in the Swiss Alps (Valais) where the current distribution range is smaller than in the recent past and population density is by ≥80% lower than in the adjacent Swiss Prealps. We tested four hypotheses to explain this lower density: (1) a too low density of camera-traps deployed for lynx surveys in Valais compared to the Prealps (methodological artifact); (2) less favorable environmental conditions around the camera-trap sites; (3) lower densities of the main prey; and (4) poaching. We estimated lynx and ungulate densities and environmental conditions at trail camera sites and could clearly reject the first three hypotheses because: (1) the survey protocol was similarly effective; (2) environmental conditions around the trapping sites in Valais were even more favorable for lynx detection than in the Prealps; and (3) prey supply was even larger in Valais. Concerning hypothesis 4, we discovered a network of illegal lynx traps (neck snares) in the main immigration corridor into Valais from the thriving adjacent lynx population in the Prealps, suggesting intense local poaching. Our findings substantiate the suspicions of long-lasting lynx poaching as a threat to the establishment and survival of the Valais population. The fact that instances of poaching were publicly known since 1995 but remained unabated for at least two decades, until the first conviction occurred, questions the commitment of local authorities to address this case of wildlife crime. Our study demonstrates the need for inquiries about poaching of top predators to be carried out at the highest levels of jurisdiction to avoid any risk of collusion between law enforcement agents and poachers.
2
Marchetti, Lorenzo, Matteo Belvedere, and Paolo Mietto. "Lopingian tetrapod footprints from the Venetian Prealps, Italy: New discoveries in a largely incomplete panorama." Acta Palaeontologica Polonica 62, no. 4 (2017): 801–17. https://doi.org/10.4202/app.00392.2017.
Повний текст джерелаАнотація:
Marchetti, Lorenzo, Belvedere, Matteo, Mietto, Paolo (2017): Lopingian tetrapod footprints from the Venetian Prealps, Italy: New discoveries in a largely incomplete panorama. Acta Palaeontologica Polonica 62 (4): 801-817, DOI: 10.4202/app.00392.2017, URL: http://dx.doi.org/10.4202/app.00392.2017
3
Reding, Jean-Paul G., Bruno Tissot, and Jocelyn Claude. "Peregrinations of the caddisfly Limnephilus affinis Curtis 1834 in the summit areas of the French Jura Mountains and Northern Prealps (Trichoptera, Limnephilidae)." Zootaxa 5057, no. 3 (2021): 446–50. https://doi.org/10.11646/zootaxa.5057.3.9.
Повний текст джерелаАнотація:
Reding, Jean-Paul G., Tissot, Bruno, Claude, Jocelyn (2021): Peregrinations of the caddisfly Limnephilus affinis Curtis 1834 in the summit areas of the French Jura Mountains and Northern Prealps (Trichoptera, Limnephilidae). Zootaxa 5057 (3): 446-450, DOI: 10.11646/zootaxa.5057.3.9
4
Feldmann, Monika, Urs Germann, Marco Gabella, and Alexis Berne. "A characterisation of Alpine mesocyclone occurrence." Weather and Climate Dynamics 2, no. 4 (2021): 1225–44. http://dx.doi.org/10.5194/wcd-2-1225-2021.
Повний текст джерелаАнотація:
Abstract. This work presents a characterisation of mesocyclone occurrence and frequency in the Alpine region, as observed from the Swiss operational radar network; 5 years of radar data are processed with a thunderstorm detection and tracking algorithm and subsequently with a new mesocyclone detection algorithm. A quality assessment of the radar domain provides additional information on the reliability of the tracking algorithms throughout the domain. The resulting data set provides the first insight into the spatiotemporal distribution of mesocyclones in the Swiss domain, with a more detailed focus on the influence of synoptic weather, diurnal cycle and terrain. Both on the northern and southern side of the Alps mesocyclonic signatures in thunderstorms occur regularly. The regions with the highest occurrence are predominantly the Southern Prealps and to a lesser degree the Northern Prealps. The parallels to hail research over the same region are discussed.
5
Magnolini, Roberto, and Lucio Bonato. "Soil centipedes (Chilopoda, Geophilomorpha) in the Val Camonica forests (Southern Alps): species composition and richness." Biodiversity Data Journal 11 (May 29, 2023): e103153. https://doi.org/10.3897/BDJ.11.e103153.
Повний текст джерелаАнотація:
Soil centipedes (Chilopoda, Geophilomorpha) are a widespread group of predators in the forest soils of the European Alps. While in the eastern and western parts of the Southern Prealps, larger efforts were devoted to sample and study the geophilomorph fauna, little is known about species richness and composition of geophilomorph communities in the central part of Southern Prealps. In this work, five sites located in the Val Camonica were surveyed by hand searching, between November 2021 and July 2022 and their species richness was estimated applying non-parametrical statistical methods (Chao-1 and Abundance-based Coverage Estimator) to account for incomplete detection. A total of 18 species were found amongst the five sites. A maximum of 12 species were recorded in each single site, while estimates suggest that another 1-3 species were likely undetected. Species composition were found highly variable also between sites with similar species richness.
6
Petri, Ivan, Francesco Ballarin, and Leonardo Latella. "Seasonal abundance and spatio-temporal distribution of the troglophylic harvestman Ischyropsalis ravasinii (Arachnida, Opiliones, Ischyropsalididae) in the Buso del Valon ice cave, Eastern Italian Prealps." Subterranean Biology 42 (April 8, 2022): 151–64. http://dx.doi.org/10.3897/subtbiol.42.81486.
Повний текст джерелаАнотація:
We explore the population of the troglophilic harvestman Ischyropsalis ravasinii inhabiting the Buso del Valon ice cave located in the Italian Prealps. Spatial and temporal distributions of the specimens are investigated in relation to the variation of environmental abiotic conditions in the cave, such as the seasonal temperature and substrate surface typology. Our results show that I. ravasinii is distributed unevenly in the cave, most of individuals being present in the scree-covered section of the cave with superficial activities limited to the warm seasons only. In addition, our data suggests that the presence of a thick layer of rocky debris, together with high humidity and cold temperatures, are important limiting factors for the species. Seven additional species of harvestman are recorded in the cave, including the congeneric troglophilic species Ischyropsalis strandi. This is the first known record of these two troglophilic Ischyropsalis species coexisting within the same cave. An updated map of the distribution of I. ravasinii and I. strandi in the Italian Prealps is provided.
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VALLE, BARBARA, ELENA EUSTACCHIO, GUIDO ROBERTO GALLO, et al. "Campanula bergomensis (Campanulaceae), a new species from Bergamo Prealps (Northern Italy)." Phytotaxa 637, no. 2 (2024): 120–32. http://dx.doi.org/10.11646/phytotaxa.637.2.1.
Повний текст джерелаАнотація:
A new species of Campanula (Campanulaceae), C. bergomensis sp. nov., is described from the Bergamo Prealps (Orobic Prealps, Lombardy, Northern Italy), based on both morphological and molecular evidence. The new species was considered in the past as an isolated population of C. cespitosa, which presents an eastern Alpine distribution. C. bergomensis is morphologically well distinguishable from C. cespitosa on the number of flowers in the racemose inflorescence, the corolla shape, and the whitish-yellow pollen surface with many spinulae. Genetically, the presence of an insertion of 81-bp in the trnL-F sequences is very characteristic. Further studies are needed to better define the phylogenetic relationship among the three closely related species, C. bergomensis, C. cespitosa and C. cochleariifolia. C. bergomensis inhabits dolomitic debris cones at low elevations. The species is range-restricted and is severely threatened by human activities. Therefore, it is urgent to adopt protection and conservation measures for the new species.
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Petri, Ivan, Francesco Ballarin, and Leonardo Latella. "Seasonal abundance and spatio-temporal distribution of the troglophylic harvestman Ischyropsalis ravasinii (Arachnida, Opiliones, Ischyropsalididae) in the Buso del Valon ice cave, Eastern Italian Prealps." Subterranean Biology 42 (April 8, 2022): 151–64. https://doi.org/10.3897/subtbiol.42.81486.
Повний текст джерелаАнотація:
We explore the population of the troglophilic harvestman Ischyropsalis ravasinii inhabiting the Buso del Valon ice cave located in the Italian Prealps. Spatial and temporal distributions of the specimens are investigated in relation to the variation of environmental abiotic conditions in the cave, such as the seasonal temperature and substrate surface typology. Our results show that I. ravasinii is distributed unevenly in the cave, most of individuals being present in the scree-covered section of the cave with superficial activities limited to the warm seasons only. In addition, our data suggests that the presence of a thick layer of rocky debris, together with high humidity and cold temperatures, are important limiting factors for the species. Seven additional species of harvestman are recorded in the cave, including the congeneric troglophilic species Ischyropsalis strandi. This is the first known record of these two troglophilic Ischyropsalis species coexisting within the same cave. An updated map of the distribution of I. ravasinii and I. strandi in the Italian Prealps is provided.
9
Valle, Barbara, Elena Eustacchio, Guido Roberto Gallo, et al. "Campanula bergomensis (Campanulaceae), a new species from Bergamo Prealps (Northern Italy)." Phytotaxa 637, no. 2 (2024): 120–32. https://doi.org/10.11646/phytotaxa.637.2.1.
Повний текст джерелаАнотація:
Valle, Barbara, Eustacchio, Elena, Gallo, Guido Roberto, Beretta, Mario, Bonelli, Marco, Zanzottera, Alice, Gianfranceschi, Luca, Federici, Germano, Mangili, Federico, Mangili, Luca, Perico, Giovanni, Traini, Myriam, Caccianiga, Marco (2024): Campanula bergomensis (Campanulaceae), a new species from Bergamo Prealps (Northern Italy). Phytotaxa 637 (2): 120-132, DOI: 10.11646/phytotaxa.637.2.1, URL: https://phytotaxa.mapress.com/pt/article/download/phytotaxa.637.2.1/51537
10
Pellegrini, Giovanni Battista, and Nicola Surian. "Geomorphological study of the Fadalto landslide, Venetian Prealps, Italy." Geomorphology 15, no. 3-4 (1996): 337–50. http://dx.doi.org/10.1016/0169-555x(95)00079-k.
Повний текст джерелаДисертації з теми "Prealps"
1
Peretti, Emiliano. "Exploring the diversity of a neglected group of soil invertebrates (Chilopoda) across the South-Eastern Prealps." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3423294.
Повний текст джерелаАнотація:
Despite their documented importance in maintaining ecosystem functioning, many groups of soildwelling
invertebrates have been inadequately studied with regards to many facets of their biology.
In this thesis, I focussed my attention on two poorly understood aspects of the diversity of soildwelling
invertebrates: (i) local values of species richness and (ii) species boundaries. As a study
system, I used one of the most neglected groups of soil invertebrates, i.e. the centipedes
(Myriapoda: Chilopoda), and I carried out my research in the area of the Southeastern Prealps,
which are known to harbour a large amount of biodiversity.
The present work is in the form of a paper collection and contains a general introduction, two
chapters and a conclusive paragraph. An original research article, dealing with the aforementioned
topics, is presented at the end of each chapter.
In chapter I, I addressed the dearth of knowledge on the local species richness of centipede
communities. I applied statistical models to estimate the actual species richness of 10 centipede
communities in the Southeastern Prealps and to compare richness values between these
communities. I demonstrated that up to 27-28 species of centipedes can coexist in syntopy in
temperate forests of the Southeastern Prealps, and that richness values can vary significantly
among communities.
In chapter II, I addressed the issue of species delimitation in poorly-vagile endogeic invertebrates,
for which traditional morphology-based taxonomy has proven ineffective in identifying species
boundaries. In particular, I applied a rigorous integrative approach, in order to test for the existence
of species boundaries in a set of populations traditionally referred to a single species of endogeic
centipede, i.e., Clinopodes carinthiacus (Chilopoda: Geophilomorpha). Taking advantage of the
integration between different lines of evidence (sequences from three DNA loci and morphological
characters) and different methods for species discovery (ABGD, GMYC, PTP and Expectation
Maximisation cluster analysis with v-fold cross-validation), I found evidence for the existence of at
least two candidate species within the investigated population system.
2
Pilli, Andrea <1971>. "Conceptual flow model of the plain-prealps system in the area between Vicenza and Trento (northeastern Italy)." Doctoral thesis, Università Ca' Foscari Venezia, 2005. http://hdl.handle.net/10579/717.
Повний текст джерела
3
Rossato, Sandro. "Evoluzione geomorfologica e paleoidrografica dell'alta pianura vicentina." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3425819.
Повний текст джерелаАнотація:
This work concerns the Late Quaternary evolution of the Western Venetian Plain, with a focus on the relations between the glacial complexes hosted in the terminal valley tract of the Astico Valley and the piedmont fans. Three distinct glacial events have been identified during this work. Remote sensing, field survey, stratigraphic measurements and reconstructions, sand petrography, radiocarbon and dendrochronological datings and pollen analyses allowed to define an evolutionary model of the Venetian plain during the Middle and Late Pleistocene. The glacial phases were distinguished in the Astico Valley and were attributed to the LGM, the MIS 6 and to a generic glaciation of the Middle Pleistocene. Sand petrography analyses show that all these glacial deposits contain rock fragments that reached the Astico Valley through a transfluence of the Adige glacier. During LGM, this glacial stream entered the Valley from the North through the Carbonare saddle (1075 m a.s.l.), as it probably happened also in previous major glaciations. The chronostratigraphy of cores drilled near the towns of Sandrigo, Marano Vicentino, Vicenza and Villaverla, as well as the data gathered from the geoelectrical surveys realized near the town of Breganze, show that the outwash stream changed its way to the piedmont plain at the end of LGM, as a response to rapid glacial collapse. This switch led to the deactivation of the north-western sector of the plain (Thiene fan) in favour of the south-eastern one (Sandrigo fan), and it could be linked with the well-known post-LMG incision of the Brenta megafan, visible also in the two cores drilled near the town of Piazzola sul Brenta. In addition, some indications about the development of the Astico River and Brenta River during the Holocene are provided.
The lower Astico Valley proved to have preserved significant evidence of even minor glacial fluctuations, in response of subtle climatic changes, which may be difficult to distinguish in major Alpine glaciers<br>La tesi è incentrata sull'evoluzione geomorfologica e paleoidrografica della pianura vicentina (pianura Veneta occidentale), durante il Pleistocene superiore e l'Olocene, con una speciale attenzione alle relazioni tra i complessi glaciali presenti nella Valdastico e i conoidi pedemontani. La ricerca ha permesso di distinguere 3 diverse fasi glaciali, identificate a partire dai depositi rinvenuti nella media e bassa Valdastico. L'utilizzo di tecniche di telerilevamento, rilevamento sul terreno, misure, correlazioni e ricostruzioni stratigrafiche, analisi petrografiche delle sabbie, datazioni dendrocronologiche e al radiocarbonio e analisi polliniche hanno permesso di costruire un solido modello evolutivo dell'area durante il Pleistocene medio e superiore. L'ultima fase glaciale è stata ascritta all'LGM, quella intermedia al MIS 6, mentre nel caso di quella più antica si può indicare solo una generale attribuzione al Pleistocene medio. Le analisi petrografiche indicano una stretta correlazione tra la presenza di una transfluenza del ghiacciaio dell'Adige in Valdastico attraverso la sella delle Carbonare (1075 m s.l.m.) e l'esistenza di un ghiacciaio vallivo sviluppato all'interno di quest'ultima. La cronostratigrafia derivante dai carotaggi meccanici realizzati vicino agli abitati di Sandrigo, Marano Vicentino, Vicenza e Villaverla, così come i risultati ottenuti da sondaggi geoelettrici realizzati in prossimità di Breganze, indicano che l'Astico cambiò direzione di deflusso in pianura in relazione al rapido collasso glaciale avvenuto alla fine dell'LGM. Questo spostamento ha determinato l'attivazione della porzione sud-orientale della pianura vicentina (il conoide di Sandrigo) a scapito della parte nord-occidentale (conoide di Thiene). Tale evento può essere correlato con l'incisione post-LGM del megafan del Brenta, ben documentata in letteratura e i cui effetti sono visibili nei carotaggi di Piazzola sul Brenta. Sono stati individuate indicazioni anche circa l'evoluzione olocenica dell'Astico e del Brenta, che seguivano direzioni di deflusso più verso sud rispetto alle attuali.
La media e bassa Valdastico si è rivelata essere un'area di interesse per la comprensione della risposta dei sistemi sedimentari fluvioglaciali ai cicli glaciale/interglaciale pleistocenici, avendo peraltro dimostrato la possibilità di rinvenire depositi indicatori di variazioni climatiche di portata anche ridotta all'interno di vallate prealpine di dimensioni medio-piccole
4
Mainieri, Robin. "La forêt, un intégrateur robuste de l'évolution de la dynamique des chutes de blocs dans un contexte de changements environnementaux ?" Electronic Thesis or Diss., Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALU009.
Повний текст джерелаАнотація:
Les chutes de pierres sont l'un des processus géomorphologiques les plus courants dans les milieux à forte pente. Malgré leur volume limité, les chutes de pierres constituent un danger important, en raison de leur évolution rapide, de leur vitesse élevée et de l'énergie d'impact. Leur caractère imprévisible peut être problématique lorsque l'on souhaite étudier en détail leur dynamique et leurs facteurs de déclenchement dans des conditions naturelles. L'influence relative des précipitations, de la fonte des neiges, de la température ou des cycles de gel-dégel est depuis longtemps reconnue, notamment grâce à des méthodes de surveillance des parois à moyen terme. A très haute altitude, des relations sans équivoque ont été établies entre l'augmentation de l'activité des chutes de pierres, le dégel du pergélisol et le réchauffement climatique. En revanche, en dessous de la limite du pergélisol, la rareté persistante de bases de données exhaustives et précises rend nos connaissances encore lacunaires. Au cours des deux dernières décennies, la dendrogéomorphologie - une approche basée sur l'analyse des dommages infligés aux arbres après des impacts d'éboulement - a été utilisée pour combler certaines limites inhérentes aux archives historiques. Paradoxalement, ces reconstitutions n'ont que rarement été comparées aux données climatiques afin de déterminer précisément les facteurs météorologiques déclencheurs ou pour détecter les influences du réchauffement climatique sur l'activité des chutes de pierres.Dans ce contexte, cette thèse vise à proposer des recommandations méthodologiques pour optimiser les stratégies d'échantillonnage afin de quantifier précisément les incertitudes des reconstructions dendrogéomorphologiques dans le temps. Nos résultats montrent que la cartographie à haute résolution des tiges sur les sites étudiés combinée à une sélection rigoureuse des espèces d'arbres situées à proximité des falaises améliore la robustesse des reconstitutions sur les parcelles étudiées à Saint-Guillaume (peuplement forestier mixte, massif du Vercors, Alpes françaises) et à Valdrôme (peuplements forestiers monospécifiques plantés, massif du Diois, Alpes françaises).Dans un second temps, nous nous servons des reconstructions obtenues et des réanalyses SAFRAN pour identifier les déclencheurs météorologiques des événements de chutes de pierres. A l'échelle interannuelle, nos résultats montrent que les précipitations estivales et les événements pluvieux intenses sont les principaux facteurs de l'activité des chutes de pierres sur les deux sites, alors qu'aucun impact clair des températures ou des cycles de gel-dégel n'a pu être détecté.Enfin, nous comparons les fluctuations décennales existantes dans les deux reconstructions dendrogéomorphologiques avec les séries climatiques disponibles pour la période 1959-2017, dans le but de détecter les impacts potentiels du réchauffement climatique sur l'activité des chutes de pierres. Dans le massif du Vercors, nous expliquons l'augmentation de l'activité des chutes de pierres observée depuis 1959 par une recolonisation forestière rapide et par la sur-représentation des jeunes arbres, plus sensibles, plutôt que par le changement climatique. Dans le massif du Diois, l'absence de tendance significative suggère qu'une légère augmentation de l'activité n'est pas soutenu par les données existantes. Cependant, la faible robustesse des modèles de régression multiple utilisés ici, l'augmentation limitée de la température sur les sites d'étude et le caractère incomplet de nos reconstructions dendrogémorphologiques suggèrent que ces résultats doivent être traités avec prudence.Au total, cette thèse démontre clairement la valeur ajoutée de la dendrogéomorphologique pour reconstruire l'activité passée des chutes de pierres, évaluer les conditions météorologiques propices aux déclenchement de cet aléa et détecter les impacts potentiels des changements environnementaux sur la dynamique des processus<br>Rockfalls are one of the most common geomorphological processes in the steeply sloping environments. Despite their limited volumes, rockfalls pose a significant hazard, due to their rapid evolution, high velocity and impact energy, but their unpredictable occurrence hinders detailed investigation of their dynamics and drivers under natural conditions. As the relative influence of rainfall, snowmelt, temperature, or freeze–thaw cycles have long been identified, based on medium-term monitoring methods, as the main drivers of rockfall activity, increasing rockfall hazards triggered by climate change are a major concern expressed both in scientific and non-scientific media.At high altitude sites, unequivocal relationships have been established between heightened rockfall activity, permafrost thawing and global warming. By contrast, below the permafrost limit, in the absence of longer-term assessments of rockfall triggers and possible changes thereof, our knowledge of rockfall dynamics remains still lacunary as a result of the persisting scarcity of exhaustive and precise rockfall databases.Over the last two decades, dendrogeomorphology – based on the analysis of damage inflicted to trees after rockfall impacts – has been used to overcome certain limitations inherent to historical archives and reconstructions of rockfall activity have been developed. Paradoxically, tree-ring reconstructions have only rarely been compared with climatic data to precisely constrain the potential meteorological triggers of process activity or to detect potential influences of global warming mostly due to the absence of clear recommendations to derive reconstructions that optimally capture the climatic signal in rockfall-prone environments.In this context, this PhD thesis first aims at proposing clear methodological guidelines to optimize sampling strategies of trees so as to precisely quantify uncertainties in dendrogeomorphic reconstructions back in time. Our results clearly evidence that the high-resolution mapping of stems on the studied combined with a careful selection of tree-species located at the vicinity of the cliffs improve the robustness of our reconstructions at the Saint-Guillaume (mixed forest stand, Vercors massif, French Alps) and Valdrôme (monospecific planted forest stands, Diois massif, French Alps) studied plots.In the second part, we capitalize on rockfall activity derived from optimized reconstructions and on the high-spatio-temporal resolution of the SAFRAN reanalyses, to precisely identify the meteorological triggers of rockfall events. At the interannual scale, our results evidence that summer precipitations and intense rainfall-events are the main drivers at both sites while no clear impact of temperature or freeze-thaw cycles could be detected.Finally, we compare decadal fluctuations existing in both tree-ring records with climatic series available for the period 1959-2017 with the purpose to detect the potential impacts of global warming on rockfall activity. In the Vercors massif, we explain increasing rockfall activity observed in the reconstruction since 1959 by a rapid forest recolonization and the overrepresentation of young sensitive trees rather than by climate change. In the Diois massif, the absence of significant trend suggests that a premature warning of increasing rockfall hazard, is not supported by the existing data. Yet, the weak robustness of the multiple regression models used here, the limited increase of temperature at the study sites and the incompleteness of our tree-ring reconstructions suggest that these results have to be treated with cautiously. All in all, this PhD thesis clearly demonstrates the added-value of the dendrogeomorphic approach to reconstruct rockfall activity, assess the meteorological driver of past events as well as to detect the potential impacts of environmental changes on the process dynamics
5
Theule, Joshua. "Etude géomorphologique de la dynamique sédimentaire de torrents à lave (Alpes Françaises)." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00864986.
Повний текст джерелаАнотація:
Dans les bassins versants abrupts de montagne, de larges quantités de sédiments provenant des pentes escarpées viennent se déposer dans la partie supérieure des torrents et sont remobilisées par les laves torrentielles ou par charriage. Le but de ce travail était d'étudier le transport des sédiments grossiers dans les petits bassins versants torrentiels et d'analyser l'influence du stockage de ces sédiments dans le chenal sur les laves torrentielles. Cela a requis sur le terrain une intense surveillance géomorphologique des événements d'écoulement dans les bassins versants des torrents du Manival et du Réal, susceptibles de produire des laves torrentielles et du transport solide par charriage chaque année.Le bilan sédimentaire du Manival a été réalisé grâce à des mesures topographiques répétées entre les événements importants d'écoulements (sections transversales et relevés au scan laser terrestre). Deux évènements de laves torrentielles et plusieurs évènements de charriage ont été observés. La reconstitution de leur budget sédimentaire a révélé que la majeure partie de leurs volumes a été apportée par l'érosion du chenal. Les évènements de charriage de l'automne ont contribué à la recharge sédimentaire du chenal principal par le dépôt de grands bancs de gravier. Ce processus est fondamental au déclenchement de laves torrentielles lors des printemps et été suivants. Un décalage dans le temps des séquences érosion /dépôt a été observé entre les parties supérieure et inférieure du chenal, révélant un transfert discontinu de sédiments dans le bassin versant. Un modèle conceptuel de transfert des sédiments est proposé pour les différentes magnitudes d'écoulement.Dans le Réal, le volume de sédiment transporté est similaire à celui du Manival avec une augmentation importante du volume dans le chenal. La plus importante lave torrentielle observée a révélé une diminution en aval des hauteurs d'écoulement maximales, des contraintes de cisaillement, de la vitesse et de la résistance à l'écoulement. Cela suggère que le front de la lave torrentielle érode et déstabilise le chenal, mais qu'il ne peut pas transporter les matériaux en raison de sa concentration élevée en sédiments. La vague hyperconcentrée qui suit se charge des matériaux restants, croît en volume et fusionne avec la lave torrentielle en décélération. Le front et les vagues suivantes jouent un rôle essentiel pour l'érosion lors d'un événement de lave torrentielle.Les laves torrentielles ont créé une érosion significative à la variabilité spatiale importante alors que les déformations du lit induites par le charriage sont en équilibre. L'érosion du chenal par les laves torrentielles est contrôlée étroitement par la pente en amont et les conditions de stockage des sédiments et peut être prédite par une relation logarithmique. Les matériaux les plus sensibles à l'érosion dans le Manival sont les bancs de gravier non consolidés formés par le charriage. Ils constituent une surface lisse au sein du chenal rugueux qui peut être automatiquement cartographiée à partir de données de laser scan terrestre ou aérien. Ceci fournit une évaluation des zones sensibles à l'érosion dans un chenal au moment du relevé au scan laser.Cette étude a permis d'alimenter le domaine des laves torrentielles en observations quantitatives sur le terrain. Des bases de données détaillées ont été obtenues par l'intégration de multiples relevés des différentes sections transversales, des nombreux balayages laser et des données des stations de mesure à haute fréquence. Les mesures de transfert de sédiments, des interactions/contrôles dans le chenal, de la dynamique des laves torrentielles. La caractérisation des stockages dans ces bassins différents fournit une base solide pour le développement de modèles conceptuels et statistiques. Ces observations ont également mis en évidence les paramètres importants à mesurer sur le terrain qui ont une influence sur les laves torrentielles.
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Sotomayor, Narda. "Modelos de empleo y política económica. PREALC, 1987." Economía, 2012. http://repositorio.pucp.edu.pe/index/handle/123456789/117625.
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Papais, Eddy <1988>. "CARATTERIZZAZIONE DEGLI HUMUS E VALUTAZIONE DEL CARBON STOCK POTENZIALE NEI SUOLI DELLE PREALPI GIULIE SETTENTRIONALI (CESARIIS, UD)." Master's Degree Thesis, Università Ca' Foscari Venezia, 2014. http://hdl.handle.net/10579/5140.
Повний текст джерелаАнотація:
I suoli rappresentano uno dei principali serbatoi di carbonio su scala globale, e giocano un ruolo cruciale nel ciclo del carbonio, uno dei processi chiave che regolano il clima. Per questa ragione, la capacità del suolo di accumulare e stabilizzare il carbonio organico ha ricevuto grande attenzione negli ultimi anni. I suoli forestali sono particolarmente ricchi di materia organica (SOM) se confrontati con i suoli agricoli, e rappresentano un fondamentale serbatoio per il sequestro della CO2 atmosferica; nonostante ciò, tali suoli possono essere fonte di gas serra, come CO2 e CH4. Tale fenomeno dipende dai processi che governano l’accumulo, la stabilizzazione e la perdita della SOM.
Il presente lavoro è focalizzato su questi aspetti, nella fattispecie gli obiettivi sono:
1) la valutazione dello stock di carbonio nella parte superficiale di suolo in diverse coperture vegetazionali delle Prealpi Giulie Settentrionali;
2) la caratterizzazione morfologica delle forme di humus per diverse tipologie vegetazionali;
3) la determinazione della qualità biologica del suolo (QBS-ar);
L’area di studio si trova nel comune di Lusevera (Friuli Venezia Giulia, NE Italia), situato nelle Prealpi Giulie Settentrionali. Nell'area di studio sono state individuate tre tipologie di suolo: Dystric Cambisol su rocce silicatiche, Eutric Cambisol su rocce carbonatiche e Rendzic Leptosol su rocce calcaree. Su di essi sono state selezionate sei coperture vegetazionali: due ornio-ostrieti, una faggeta, un acero-frassineto, una pecceta ed un prato da sfalcio. I profili di suolo sono stati analizzati al fine di classificarne le forme di humus, e sono stati prelevati dei campioni di topsoil per le analisi chimico-fisiche e per la determinazione della qualità biologica del suolo (QBS-ar).
Sono stati determinati:
1) Il pH per via potenziometrica;
2) Il contenuto di carbonio organico con metodo Walkley-Black;
3) Il calcare totale per via gas-volumetrica;
4) La capacità di scambio cationica con BaCl2 e trietanolammina;
5) La tessitura mediante metodo della pipetta.
6) l'acidità scambiabile
Per il riconoscimento delle forme di humus si è fatto riferimento al sistema di classificazione francese Référentiel Pédologique, che ben si adatta all’ambiente forestale italiano.
Per la determinazione del QBS è stato utilizzato il selettore di Berlese-Tullgren modificato, per la raccolta della fauna invertebrata presente nei campioni di suolo.
Il carbon stock potenziale (SOC) di ciascun topsoil è stato calcolato effettuando la sommatoria degli stock di carbonio dei singoli orizzonti dell’episolum umifero. I valori di carbonio organico, necessari per effettuare tale stima, sono stati ottenuti elaborando i dati acquisiti con il metodo Walkley-Black.
Le forme di humus identificate variano da forme meno evolute quali Dysmoder e Dysmull a forme più evolute quali Amphimus, Mesomull ed Eumull.
Sono state evidenziate relazioni tra gli stock di carbonio e le differenti tipologie vegetazionali, in relazione alle differenti caratteristiche morfologiche e geopedologiche nell’area di studio.
Importanti informazioni, sulla maturità e la stabilità dei diversi ecosistemi forestali presenti nelle stazioni esaminate, sono state ottenute grazie allo studio della qualità biologica del suolo.
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KADRI, SALIMA. "Modulation de la secretion de l'hormone de croissance gh chez la brebis prealpes du sud : influence sur la production laitiere." Paris 6, 1989. http://www.theses.fr/1989PA066266.
Повний текст джерелаАнотація:
Le role de la gh sur la galactopoiese etant etabli, nous avons entrepris l'etude de la modulation des taux de gh et de son incidence sur la production laitiere apres une induction artificielle de la lactation par injection d'stradiol et de progesterone chez la brebis. L'influence des facteurs environnementaux sur le niveau de base de la gh et sur l'efficacite de la stimulation par le grf est etudiee: les apports nutritionnels eleves en energie abaissent le niveau de la gh endogene. Inversement des niveaux energetiques bas, elevent les taux plasmatiques. Cependant cette situation physiologie n'est pas adequate a une lactation. Les reponses gh a une stimulation par le grf ne semblent pas etre modifiees par les taux de base de gh. La variabilite individuelle de ces reponses est grande, et liee vraisemblablement a des facteurs genetiques. La presence de hauts niveaux d'stradiol dans le plasma coincide avec des taux eleves de gh circulante. Les niveaux de gh plasmatiques sont augmentes durant la periode d'induction et amplifies par des injections du facteur de liberation de la gh. Cette elevation entraine une augmentation de la production laitiere attribuable a un effet sur l'accroissement du tissu epithelial. Durant l'induction de la lactation, la somatostatine deregule la secretion normale de gh et freine le demarrage de la lactation vraisemblablement par l'inhibition de la croissance mammaire
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Bochaton, Sidonie. "Les chanoines réguliers en Savoie du Nord : Restitution des abbayes d'Abondance et de Sixt (XIIe-XVIIe siècle)." Electronic Thesis or Diss., Lyon, 2021. http://www.theses.fr/2021LYSE2076.
Повний текст джерелаАнотація:
Fondée dans les « déserts » savoyards de la première moitié du XIIe siècle, la congrégation d’Abondance a compté, du temps de son apogée, cinq abbayes réparties entre Savoie et Jura, avant de disparaître au début du XVIIe siècle en raison de la réforme de l’abbaye-mère. Sa première fille de Sixt et elle sont les seules abbayes de la congrégation à subsister dans l’ancien diocèse de Genève et constituent aujourd’hui des sites majeurs du patrimoine savoyard. Si Abondance a bénéficié de la curiosité de quelques archéologues et architectes depuis 1860, Sixt est restée ignorée jusqu’aux années 2000, en raison de la destruction d’une partie des bâtiments conventuels et de l’aménagement d’un hôtel en leur sein. Une approche transdisciplinaire, convoquant l’archéologie, l’histoire, l’histoire de l’art et l’étude des sources textuelles et iconographique, a permis de reconstituer l’évolution architecturale des deux sites sur le temps long, du XIIe siècle au XIXe siècle. Confrontée aux principales problématiques du mouvement canonial, telles que la vie commune, le ministère pastoral, l’assistance et la charité ou encore la présence de femmes dans les communautés augustiniennes, l’étude des bâtiments révèle les choix et l’évolution de la vie des frères d’Abondance, depuis la réforme grégorienne jusqu’à François de Sales, qui met un terme à ce pan de l’histoire religieuse savoyarde en 1604. Plus largement, cette thèse a permis de mieux cerner l’architecture augustinienne en Savoie du Nord, région historique où les chanoines réguliers étaient nombreux à se répartir le territoire, mais aussi de réfuter certaines légendes et hypothèses généralement admises, telle l’identité du bienheureux Ponce « de Faucigny »<br>Founded in the Savoyard "deserts" in the first half of the 12th century, the Abondance congregation had five abbeys in its heyday, spread between Savoy and the Jura, before disappearing at the beginning of the 17th century due to the reform of the mother abbey. Abondance and its first daughter in Sixt are the only abbeys of the congregation to remain in the former diocese of Geneva and are today major sites of Savoyard heritage. While Abondance has benefited from the curiosity of a few archaeologists and architects since 1860, Sixt remained ignored until the year 2000, due to the destruction of parts of the conventual buildings and the development of a hotel within them. A transdisciplinary approach, calling on archaeology, history, art history and the study of textual and iconographic sources, has made it possible to retrace the architectural evolution of the two sites over time, from the 12th to the 19th century. Confronted with the main issues of the canonical movement, such as communal life, pastoral ministry, assistance and charity, or the presence of women in the Augustinian communities, the study of the buildings reveals the choices and the evolution of the life of the brothers of Abondance, from the Gregorian reform to François de Sales, who put an end to this part of Savoyard religious history in 1604. More broadly, this thesis has made it possible to better understand Augustinian architecture in Northern Savoy, a historical region where the Regular Canons were numerous and spread over the territory, but also to refute certain legends and hypotheses generally accepted, such as the identity of Blessed Ponce "de Faucigny"
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Uczak, Lucia Hugo. "O preal e as e as políticas de avaliação educacional para a américa latina." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/94732.
Повний текст джерелаАнотація:
Esta pesquisa teve como objetivo analisar a atuação do Programa de Reformas Educacionais na América Latina (PREAL) na articulação de políticas educacionais para a América Latina, destacando as políticas de avaliação. A abordagem de pesquisa adotada foi qualitativa, realizada através de análise documental de publicações feitas pelo programa, no período entre 1995 e 2010. Para isso, iniciouse o estudo fazendo a contextualização desse período histórico, abordando o neoliberalismo como estratégia de superação da crise econômica e as medidas de ajuste impostas à América Latina, coordenadas pelos organismos internacionais. Procurou-se mostrar como as políticas de avaliação são postas na agenda das reformas educacionais justificadas pela busca da qualidade da educação e, do mesmo modo, tornaram-se centrais para indicação de outras reformas. O estudo das Declarações e dos Planos de Ação das Cúpulas das Américas mostra como se constroem as agendas educacionais e indicam as medidas necessárias para materializar as propostas. O PREAL foi criado a partir das Cúpulas com objetivo de formar o consenso em torno das reformas imperativas para defesa da atual ordem econômica vigente. Sua organização em forma de rede agrega lideranças da economia, da política e da mídia, representantes de vários países, protagonistas das reformas voltadas para o mercado. Procura-se evidenciar o quanto as recomendações estão embasadas numa lógica competitiva sob o argumento de que a partir da competição se alcança melhor qualidade da educação. Os documentos analisados evidenciam o protagonismo dos empresários na defesa de uma concepção de educação instrumental, voltada para a produtividade. As recomendações do PREAL para a avaliação educacional envolvem, além da participação em testes internacionais, a criação de padrões e avaliações nacionais e formação de bancos de dados de modo a possibilitar a comparação entre os países. O estudo aponta para o uso da avaliação como instrumento de legitimação da lógica capitalista e, ao mesmo tempo, com a adoção da avaliação de larga escala, a criação de um mercado bilionário para atender essa demanda em nível internacional.<br>Esta pesquisa tuvo como objetivo analizar las acciones del Programa de Reformas Educacionales en la América Latina (PREAL) en la articulación de políticas educacionales para la América Latina, destacando las políticas de evaluación. El abordaje investigativo adoptado fue cualitativo, realizado a través del análisis documental de publicaciones hechas por el programa, en el periodo entre 1995 a 2010. Para tanto, el estudio se inicia presentando una contextualización histórica de este período, identificando el neoliberalismo como estrategia de superación de la crisis económica y las medidas de ajuste impuestas en América Latina coordenadas por los organismos internacionales. Se demuestra cómo las políticas de evaluación son puestas en la agenda de las reformas educacionales y son justificadas con el argumento de la búsqueda de la calidad en la educación, asimismo, se transformaron en elementos centrales para la indicación de reformas. El estudio de las Declaraciones y de los Planes de Acción de las Cumbres de las Américas muestra como se construyen las agendas educacionales e cómo se indican las medidas necesarias para materializar las propuestas. El PREAL fue creado a partir de las Cumbres con el objetivo de formar un consenso al rededor de las reformas imperativas para la defensa del orden económico vigente. Su organización en forma de red agrega líderes de la economía, de la política, de los medios de comunicación y representantes de varios países, todos protagonistas de reformas direccionadas para el mercado. Se evidencia cuánto las recomendaciones están basadas en una lógica competitiva bajo el argumento de que a partir de la competición se alcanza mejor calidad de la educación. Los documentos analizados revelan el protagonismo de los empresarios en la defensa de una concepción de educación instrumental, con orientación principal en la productividad. Las recomendaciones de PREAL para la evaluación educacional envuelve, además de participación en exámenes internacionales, la creación de padrones y evaluaciones nacionales y formación de bancos de datos de modo a posibilitar la comparación entre los países. El estudio apunta el uso de la evaluación como instrumento de legitimación de la lógica capitalista y, al mismo tiempo, que la adopción de la evaluación de gran escala impulsa la creación de un mercado billonario encaminado a atender esta demanda en nivel internacional.
Книги з теми "Prealps"
1
Auteur, Perco Franco, Tagliaferri Marina Auteur, and Crivellari Massimo (photographe) Photographie, eds. Friuli Venezia-Giulia: Alpi e Prealpi, Alps and Prealps. Magnus, 2007.
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4
Grava, Giuseppe. La fienagione nelle Prealpi venete. Neri Pozza editore, 1999.
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5
Dematteis, Luigi. Case contadine nelle Prealpi Venete. Priuli & Verlucca, 1990.
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6
Bianca, Cita Maria, Gelati Romano, and Gregnanin Arrigo, eds. Alpi e Prealpi lombarde: 11 itinerari. BE-MA, 1990.
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7
Mozzanica, Ivo. Itinerari nelle Prealpi Lepontine: Valsolda, Val Cavargna, Val d'Albano. Electa, 2001.
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8
Sarti, Carlo. Il Kimmeridgiano delle Prealpi veneto-trentine: Fauna e biostratigrafia. Museo civico di storia naturale di Verona, 1993.
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9
Scrimali, Antonio. Prealpi giulie: Escursioni e testimonianze sui monti della grande guerra. Panorama, 1997.
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10
Battista, Vai Gian, ed. Alpi e Prealpi Carniche e Giulie: Friuli Venezia-Giulia : 9 itinerari. BE-MA, 2002.
Знайти повний текст джерелаЧастини книг з теми "Prealps"
1
Self, Douglas. "Preamp architecture." In Small Signal Audio Design, 4th ed. Focal Press, 2023. http://dx.doi.org/10.4324/9781003332985-7.
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Self, Douglas. "Preamp Architecture." In Electronics for Vinyl. Routledge, 2017. http://dx.doi.org/10.4324/9781315202174-4.
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3
Da Re, Riccardo, Giorgio Franceschetti, and Elena Pisani. "LEADER and Social Capital in Veneto: The Case Studies of Prealpi e Dolomiti and Bassa Padovana Local Action Groups." In Social Capital and Local Development. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54277-5_13.
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TREVISANI, ENRICO, and RICCARDO CESTARI. "Upper Cretaceous Rudist Bivalves from Basinal Highs (Venetian Prealps, Northern Italy)." In Cretaceous Rudists and Carbonate Platforms: Environmental Feedback. SEPM (Society for Sedimentary Geology), 2007. http://dx.doi.org/10.2110/pec.07.87.0071.
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5
"preamp, n." In Oxford English Dictionary, 3rd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/1781861639.
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"Amplification and Distortion: A Simple Circuit That Goes From Clean Preamp to Total Distortion, and an Envelope Follower." In Handmade Electronic Music. Routledge, 2009. http://dx.doi.org/10.4324/9780203879627-33.
Повний текст джерелаТези доповідей конференцій з теми "Prealps"
1
Lanz, Michael, Roland Graf, and Kurt Bollmann. "Breeding habitat of a mysterious forest bird – the woodcock in the Swiss Prealps." In 5th European Congress of Conservation Biology. Jyvaskyla University Open Science Centre, 2018. http://dx.doi.org/10.17011/conference/eccb2018/107833.
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2
Walker, Susan, Marco D'Incecco, and Nicola D'Ambrosio. "Hands on Electronics: Preamps for SiPMs." In Gran Sasso Summer Institute 2014 Hands-On Experimental Underground Physics at LNGS. Sissa Medialab, 2015. http://dx.doi.org/10.22323/1.229.0027.
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3
Elrod, Scott. "Bryan Preas." In the 2014. ACM Press, 2014. http://dx.doi.org/10.1145/2560519.2568054.
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4
Bayruns, Robert J., Timothy Laverick, Norman Scheinberg, and Daniel Stofman. "Design of low-noise wide-dynamic-range GaAs optical preamps." In San Diego, '91, San Diego, CA, edited by T. S. J. Jayadev. SPIE, 1991. http://dx.doi.org/10.1117/12.49322.
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Kaniel, A., D. Stegmeir, and K. M. Rabii. "Multimedia CRT Preamp with Overlay and Test." In IEEE International Conference on Consumer Electronics. IEEE, 1994. http://dx.doi.org/10.1109/icce.1994.582273.
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Abel, Jay. "Improving Hydrophone Preamp Performance with Bias Resistor Feedback." In OCEANS 2022, Hampton Roads. IEEE, 2022. http://dx.doi.org/10.1109/oceans47191.2022.9976966.
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Sze, Cliff. "Session details: Commemoration for Dr. Bryan Preas." In ISPD'14: International Symposium on Physical Design. ACM, 2014. http://dx.doi.org/10.1145/3250896.
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Takechi, Masaru, Keiichi Araki, Yukiyasu Furukawa, et al. "PIN/Preamp receiver modules for 40-Gb/s optical communication systems." In ITCom 2002: The Convergence of Information Technologies and Communications, edited by Achyut K. Dutta, Abdul Ahad S. Awwal, Niloy K. Dutta, and Katsunari Okamoto. SPIE, 2002. http://dx.doi.org/10.1117/12.475559.
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Hayden, Carl C., Mark W. Kimmel, and Rick Trebino. "Amplification and TEM00 continuum generation of femtosecond pulses." In OSA Annual Meeting. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.thmm33.
Повний текст джерелаАнотація:
We have built an apparatus capable of generating tunable 60-fsec, 350-μJ, TEM00 pulses in the visible and near IR. It involves a colliding-pulse mode-locked dye laser stably producing pulses as short as 35 fsec, a novel bowtielike combination preamp/amplifier, pulse compressor, solid-state TEM00 continuum generator, and two-stage Bethune-cell amplifier. Here, we describe in more detail the novel aspects of our apparatus (the bowtie preamp/amplifier and the continuum generator), which represent useful advances over current technology. Pumped by a short 5-nsec pulse from a frequency-doubled Nd:YAG laser, the bowtie amplifier allows only three passes by the fsec pulse through the dye cell during the pump-pulse duration. However, additional amplification, using a larger spot size, is desirable. Because pumping is longitudinal, the dye concentration of a second amplifier into a single six-pass cell in which two separate spots are pumped. We measure a gain of 2 × 105 with this device and output pulses of 100 μJ (and 50 fsec after compression) using a pump power of 25 mJ. Our continuum generation apparatus involves a spatial prefilter, variable energy attenuator, and careful focusing to a spot just prior to the 1/16 in. thick quartz plate continuum sample. The energy of the input pulse is limited to avoid small-scale self-focusing, and the input beam angular dispersion is carefully limited to avoid significantly greater angular dispersion in the continuum output. In this way, we obtain approximately 10 nJ of light in a 20-nm bandwidth 2500 cm-1 away from the input wavelength. While this represents a fairly low efficiency, it is easily amplified to high power due to its good spatial quality.
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Patterson, Edward M., David W. Roberts та Gary G. Gimmestad. "Development of a 1.54 μm Eyesafe Raman-Shifted Lidar". У Optical Remote Sensing of the Atmosphere. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/orsa.1990.tud13.
Повний текст джерелаАнотація:
Eyesafe operation is desirable when lidar systems are used in programs in which personnel can be in the path of the laser beam. This is of particular importance in scanning systems, or in systems that are designed for automated, unattended operation. In practice, in order to be eyesafe at short ranges from the transmitter and still maintain a reasonable pulse energy output, the source wavelength must be shorter than 400 nm or longer than 1.4 μm [1]. With the exception of long wavelength CO2 systems, commonly used lidar systems are not eyesafe and require stringent precautions for safe operation. Since these CO2 systems have several disadvantages, including reduced detector/preamp performance at 10 μm and the need for cryogenically cooled detectors, there is a need for a short wavelength lidar that is capable of eyesafe operation. Interest in the properties of the atmosphere at near infrared wavelengths and recent developments in detectors have made the concept of an eyesafe system in the range of 1.4 to 1.8 μm an attractive option.
Звіти організацій з теми "Prealps"
1
Kandasamy, A. Irradiation study on GEM IPC preamp/shaper. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/28413.
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