Cours philsosphique et interprétatif des initiations anciennes et modernes,

Mode of access: Internet.

Russie,

Mode of access: Internet.

Cartulaires des abbayes d'Aniane et de Gellone publiés d'après les manuscrits originaux.

"Table chronologique et table alphabétique des matièrcs" and "Table des noms de personnes et des noms de lieux" of each vol. published in Montpellier by Imprimerie générale du Midi.

Genetic analysis of complex demographic scenarios: Spatially expanding populations of the cane toad, Bufo marinus

Inferring the spatial expansion dynamics of invading species from molecular data is notoriously difficult due to the complexity of the processes involved. For these demographic scenarios, genetic data obtained from highly variable markers may be profitably combined with specific sampling schemes and information from other sources using a Bayesian approach. The geographic range of the introduced toad Bufo marinus is still expanding in eastern and northern Australia, in each case from isolates established around 1960. A large amount of demographic and historical information is available on both expansion areas. In each area, samples were collected along a transect representing populations of different ages and genotyped at 10 microsatellite loci. Five demographic models of expansion, differing in the dispersal pattern for migrants and founders and in the number of founders, were considered. Because the demographic history is complex, we used an approximate Bayesian method, based on a rejection-regression algorithm. to formally test the relative likelihoods of the five models of expansion and to infer demographic parameters. A stepwise migration-foundation model with founder events was statistically better supported than other four models in both expansion areas. Posterior distributions supported different dynamics of expansion in the studied areas. Populations in the eastern expansion area have a lower stable effective population size and have been founded by a smaller number of individuals than those in the northern expansion area. Once demographically stabilized, populations exchange a substantial number of effective migrants per generation in both expansion areas, and such exchanges are larger in northern than in eastern Australia. The effective number of migrants appears to be considerably lower than that of founders in both expansion areas. We found our inferences to be relatively robust to various assumptions on marker. demographic, and historical features. The method presented here is the only robust, model-based method available so far, which allows inferring complex population dynamics over a short time scale. It also provides the basis for investigating the interplay between population dynamics, drift, and selection in invasive species.

The extreme right in France:from Pétain to Le Pen

The Front National has for some years been France's third political party and the most notable far-right force in Europe; its leader, Jean-Marie Le Pen, contested the 2002 presidential election run-off with 5.5 million votes. What do Le Pen and the FN represent? What are their historical roots, their values and their policies? Who votes for them and why? And what has been their impact on the political agenda in France? Adopting an essentially chronological approach, the book traces the political lineage of Le Pen and the FN through key figures, movements and events on the French extreme right from the Vichy regime to the present, providing a detailed historical perspective for understanding the FN today. Part I provides a historical study of the extreme right in France since 1940, examining • the Vichy regime, collaboration and ‘collaborationism’, • the aftermath of Liberation and the post-war extreme right, • the Poujadist movement and the politics of populism, • the Algerian War as a catalyst for change, • the ‘Nouvelle Droite’ and the search for doctrinal renewal, • old and new forms of extreme-right ideology and activism. Part II undertakes a comprehensive study of the FN, analysing • the party’s early development and electoral rise, • its evolving programme and strategy, • the factors underlying its popular appeal, • the geography and composition of its electorate, • its exercise of local power and regional influence, • and its defining impact on the national political agenda. The FN, it is argued, represents both the latest manifestation of a long tradition of authoritarian nationalism and a complex new phenomenon within the changing social and political dynamics of contemporary France.

Support for Le Pen in France:two elections in trompe l’oeil

There is a comforting consensus among political commentators that the 2007 presidential election marked the end of Jean-Marie Le Pen as a force in French politics. The shock election of the Front National leader to the presidential run-off in 2002, by contrast, is explained as a surge in the Le Pen vote specific to the prevailing electoral conditions. This article challenges that interpretation of both elections. It shows that, despite Le Pen’s unforeseen success in 2002, there was no surge of support for him, and that despite Le Pen’s supposed collapse in 2007, he won close to 4 million votes while popular agreement with his ideas rose to its highest recorded level. The article concludes that Le Pen remains a powerful presence in French politics and that his supporters continue to constitute a large and highly influential constituency.

Female Secondary School Leaders: At the Helm of Democratic Schooling and Social Justice

We chose the philosophical tradition of phenomenology as the qualitative methodology to study four women school leaders. Semi-structured interview data indicated that their professional experiences impacted how their leadership practices advance social justice in their education organizations, espouse the belief that equity matter, and exemplify the torchbearers of democratic ideals.

Race, Gender, & Leadership: Perspectives of Female Secondary Leaders

Female secondary principals not only have to deal with internal and external pressures to lead successfully but are scrutinized because of their gender (Shakeshaft, 1993; Skrla & Young, 2003; Thurman, 2004). The purpose of this study was to investigate how female secondary principals from one southwestern state teased out complex views of leadership, gender, and race.

Impact of high pCO2 and warmer temperatures on the process of silica biomineralization in the sponge Mycale grandis

Siliceous sponges have survived pre-historical mass extinction events caused by ocean acidification and recent studies suggest that siliceous sponges will continue to resist predicted increases in ocean acidity. In this study, we monitored silica biomineralization in the Hawaiian sponge Mycale grandis under predicted pCO2 and sea surface temperature scenarios for 2100. Our goal was to determine if spicule biomineralization was enhanced or repressed by ocean acidification and thermal stress by monitoring silica uptake rates during short-term (48 h) experiments and comparing biomineralized tissue ratios before and after a long-term (26 d) experiment. In the short-term experiment, we found that silica uptake rates were not impacted by high pCO2 (1050 µatm), warmer temperatures (27°C), or combined high pCO2 with warmer temperature (1119 µatm; 27°C) treatments. The long-term exposure experiments revealed no effect on survival or growth rates of M. grandis to high pCO2 (1198 µatm), warmer temperatures (25.6°C), or combined high pCO2 with warmer temperature (1225 µatm, 25.7°C) treatments, indicating that M. grandis will continue to prosper under predicted increases in pCO2 and sea surface temperature. However, ash-free dry weight to dry weight ratios, subtylostyle lengths, and silicified weight to dry weight ratios decreased under conditions of high pCO2 and combined pCO2 warmer temperature treatments. Our results show that rising ocean acidity and temperature have marginal negative effects on spicule biomineralization and will not affect sponge survival rates of M. grandis.

Seawater acidification affects the physiological energetics and spawning capacity of the Manila clam Ruditapes philippinarum during gonadal maturation

Ocean acidification is predicted to have widespread implications for marine bivalve mollusks. While our understanding of its impact on their physiological and behavioral responses is increasing, little is known about their reproductive responses under future scenarios of anthropogenic climate change. In this study, we examined the physiological energetics of the Manila clam Ruditapes philippinarum exposed to CO2-induced seawater acidification during gonadal maturation. Three recirculating systems filled with 600 L of seawater were manipulated to three pH levels (8.0, 7.7, and 7.4) corresponding to control and projected pH levels for 2100 and 2300. In each system, temperature was gradually increased ca. 0.3 °C per day from 10 to 20 °C for 30 days and maintained at 20 °C for the following 40 days. Irrespective of seawater pH levels, clearance rate (CR), respiration rate (RR), ammonia excretion rate (ER), and scope for growth (SFG) increased after a 30-day stepwise warming protocol. When seawater pH was reduced, CR, ratio of oxygen to nitrogen, and SFG significantly decreased concurrently, whereas ammonia ER increased. RR was virtually unaffected under acidified conditions. Neither temperature nor acidification showed a significant effect on food absorption efficiency. Our findings indicate that energy is allocated away from reproduction under reduced seawater pH, potentially resulting in an impaired or suppressed reproductive function. This interpretation is based on the fact that spawning was induced in only 56% of the clams grown at pH 7.4. Seawater acidification can therefore potentially impair the physiological energetics and spawning capacity of R. philippinarum.

Effects of ocean acidification on the swimming ability, development and biochemical responses of sand smelt larvae

Ocean acidification, recognized as a major threat to marine ecosystems, has developed into one of the fastest growing fields of research in marine sciences. Several studies on fish larval stages point to abnormal behaviours, malformations and increased mortality rates as a result of exposure to increased levels of CO2. However, other studies fail to recognize any consequence, suggesting species-specific sensitivity to increased levels of CO2, highlighting the need of further research. In this study we investigated the effects of exposure to elevated pCO2 on behaviour, development, oxidative stress and energy metabolism of sand smelt larvae, Atherina presbyter. Larvae were caught at Arrábida Marine Park (Portugal) and exposed to different pCO2 levels (control: 600 µatm, pH = 8.03; medium: 1000 µatm, pH = 7.85; high: 1800 µatm, pH = 7.64) up to 15 days, after which critical swimming speed (Ucrit), morphometric traits and biochemical biomarkers were determined. Measured biomarkers were related with: 1) oxidative stress-superoxide dismutase and catalase enzyme activities, levels of lipid peroxidation and DNA damage, and levels of superoxide anion production; 2) energy metabolism - total carbohydrate levels, electron transport system activity, lactate dehydrogenase and isocitrate dehydrogenase enzyme activities. Swimming speed was not affected by treatment, but exposure to increasing levels of pCO2 leads to higher energetic costs and morphometric changes, with larger larvae in high pCO2 treatment and smaller larvae in medium pCO2 treatment. The efficient antioxidant response capacity and increase in energetic metabolism only registered at the medium pCO2 treatment may indicate that at higher pCO2 levels the capacity of larvae to restore their internal balance can be impaired. Our findings illustrate the need of using multiple approaches to explore the consequences of future pCO2 levels on organisms.

Nighttime dissolution in a temperate coastal ocean ecosystem increases under acidification

Anthropogenic emissions of carbon dioxide (CO2) are causing ocean acidification, lowering seawater aragonite (CaCO3) saturation state (Omega arag), with potentially substantial impacts on marine ecosystems over the 21st Century. Calcifying organisms have exhibited reduced calcification under lower saturation state conditions in aquaria. However, the in situ sensitivity of calcifying ecosystems to future ocean acidification remains unknown. Here we assess the community level sensitivity of calcification to local CO2-induced acidification caused by natural respiration in an unperturbed, biodiverse, temperate intertidal ecosystem. We find that on hourly timescales nighttime community calcification is strongly influenced by Omega arag, with greater net calcium carbonate dissolution under more acidic conditions. Daytime calcification however, is not detectably affected by Omega arag. If the short-term sensitivity of community calcification to Omega arag is representative of the long-term sensitivity to ocean acidification, nighttime dissolution in these intertidal ecosystems could more than double by 2050, with significant ecological and economic consequences.