Search results for "marsh"
showing 10 items of 98 documents
L'exclusion des ministres communistes du gouvernement en mai 1947
2022
Le 4 mai 1947, les ministres communistes sont exclus du gouvernement, auquel ils participaient depuis la Libération. Dans un contexte de conflictualité sociale et d'exacerbation des tensions géopolitiques, à l'aube de la guerre froide, l'alliance tripartite entre le PCF, la SFIO et le MRP semblait vouée à la rupture. Celle-ci n'était toutefois pas pensée comme définitive par les communistes en mai 1947, de telle sorte que l'on peut distinguer deux dynamiques qui participent successivement au processus d'isolement des communistes : une « exclusion positive » de ces derniers par le reste du gouvernement dans un premier temps, avec la conviction de pouvoir y revenir rapidement, puis un phénomè…
Rzadkie i ginące zbiorowiska roślin wodnych z klasy Potametea Słowińskiego Parku Narodowego
2018
Słowiński Park Narodowy, o powierzchni 32 744 ha, został utworzony w 1967 roku, a do sieci Światowych Rezerwatów Biosfery włączony w 1977 roku. Ponad połowę obszaru parku zajmują ekosystemy wodne, w tym pobrzeże Bałtyku, jeziora Łebsko, Gardno, Dołgie Wielkie i Dołgie Małe oraz w mniejszym stopniu rzeki: Łeba, Łupawa i Pustynka. W trakcie badań prowadzonych w latach 2013–2014 stwierdzono stanowiska czterech rzadkich i ginących zbiorowisk roślin wodnych z klasy Potametea, nienotowanych dotąd na obszarze Słowińskiego PN. Są to zespoły: rdestnicy trawiastej Potametum graminei, rdestnicy alpejskiej Potametum alpini, rogatka krótkoszyjkowego Ceratophylletum submersi ze związku Potamion oraz zesp…
A beam search algorithm for minimizing crane times in premarshalling problems
2022
The premarshalling problem consists of sorting the containers placed in a bay of the container yard so that they can be retrieved in the order in which they will be required. We study the premarshalling problem with crane time minimization objective and develop a beam search algorithm, with some new elements adapted to the characteristics of the problem, to solve it. We propose various evaluation criteria, depending on the type of container movement, for its local evaluation; a new heuristic algorithm including local search for blue its global evaluation; and several new dominance rules. The computational study shows the contribution of each new element. The performance of the complete algo…
The Coastal Levantine Area
2017
The Coastal Levantine area is a very diverse territory situated between the Cap de Creus and the Cap de la Nau. The wide variety of environments and ecological conditions that occur in this area determine its great diversity and richness from the vegetation point of view. Forest composition depends mainly on climatic factors, geomorphology and soil features, and are currently dominated by evergreen sclerophyllous (Quercus ilex, Q. rotundifolia, Q. suber), conifer (Pinus halepensis, P. pinaster, P. pinea, P. salzmannii, P. sylvestris), and deciduous (Fagus sylvatica, Quercus petraea) and semi-deciduous (Quercus faginea, Q. canariensis, Q. pubescens, Q. pyrenaica) species in inland areas with…
Geoarchaeological evidence of marshland destruction in the area of Rungholt, present-day Wadden Sea around Hallig Südfall (North Frisia, Germany), by…
2018
Abstract Geophysical and geoarchaeological investigations were carried out in the Wadden Sea of North Frisia (Schleswig-Holstein, Germany) to elucidate major environmental changes that considerably altered the coastal landscape since medieval times. Between the 12 th and 14 th cent. AD, the present-day tidal flats around the marsh island Hallig Sudfall belonged to the historical Edomsharde district and its main settlement Rungholt . For North Frisia, it is well known that during medieval and early modern times, extreme storm surges caused major land losses associated with a massive landward shift of the coastline. Today, cultural traces like remains of dikes, drainage ditches, terps or even…
Environmental evidence of Valencia lagoon coastal barrier stabilization from 8500 BP to Present. Climate and eustatic variations
2020
Abstract The Albufera de Valencia is one of the largest lagoon in the Spanish Mediterranean. Two continuous borehole cores reaching depths of 8 and 14 m in the northern part of the lagoon underwent sedimentological, micropaleontological and biological study. The organic content was also analysed, and 14C radiometric dating and amino acid racemization were performed. Study of the content of benthic foraminifera and n-alkanes and alkanoic acids in the lagoon sedimentary record identified several periods. The core records showed seven different environments: alluvial; freshwater marsh; brackish marsh; brackish lagoon; brackish lagoon with marine connection, backbarrier flat, and backshore. The…
Consolidation by Game-Playing: a Gamesmanship Inquiry into Forestry Industry
2006
If one takes a flight in Finland from the country’s capital, Helsinki, for instance, north to Rovaniemi, the ‘Gateway to Lapland’, the scenery below consists typically of lakes, rivers and marshland, but most of all of forests. Wood in all its forms has been for centuries the core of the national character as well as the locomotive of business in Finland. Over the years the Finns have come to understand that the forest sector is perhaps the strongest guarantor of the Finnish economy and identity. The old saying ‘Finland earns its living from its forests’ can even be interpreted to mean ‘what is good for the forest sector is good for Finland’. Lilja, Tainio and Rasanen (1991a) encapsulated t…
Estimating natal dispersal movement rates of female European ducks with multistate modelling
2003
Summary 1 We used up to 34 years of capture–recapture data from about 22 100 new releases of day-old female ducklings and multistate modelling to test predictions about the influence of environmental, habitat and management factors on natal dispersal probability of three species of ducks within the Engure Marsh, Latvia. 2 The mean natal dispersal distances were very similar (c. 0·6–0·7 km) for all three species and were on average 2·7 times greater than breeding dispersal distances recorded within the same study system. 3 We were unable to confirm the kinship hypothesis and found no evidence that young first-nesting females nested closer to their relatives (either mother or sister) than to …
Factors affecting breeding dispersal of European ducks on Engure Marsh, Latvia
2003
Summary 1 We used up to 35 years of capture–recapture data from nearly 3300 individual female ducks nesting on Engure Marsh, Latvia, and multistate modelling to test predictions about the influence of environmental, habitat and management factors on breeding dispersal probability within the marsh. 2 Analyses based on observed dispersal distances of common pochards and tufted ducks provided no evidence that breeding success in year t influenced dispersal distance between t and t+ 1. 3 Breeding dispersal distances (year t to t+ 1) of pochards and tufted ducks were associated with a delay in relative nest initiation dates in year t+ 1. The delay was greater for pochards (c. 4 days) than for tu…
Soviet era landscape change and the post-Soviet legacy in Latvia
2019
The collectivisation of agriculture and the development and application of land improvement “melioration” programmes and technologies, as well as the construction of kolkhoz centres during the Soviet era in Latvia was extensive and has a legacy on the post-Soviet landscape and agricultural economy. A study of a number of rural municipalities in different landscape types, through the comparison of maps from the early 20th century with those from around 2000, and one example with maps from the 1960s and 1990s, together with field work, revealed the degree of change that had taken place. In particular, there was a significant increase in forest – despite the kolkhoz system being targeted at in…