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WOS: 000446389700024 Introduction: The present study focuses on Diatoms of Bashar Riverof the Yasuj City, Iran. The Bashar River provides a wide scope of identification of algal diversity existing in the River. The River is an important source of water for agriculture and it is essential to assess the quality of water. Diatoms are a major group of algae, and are among the most common types of phytoplankton. Material and Methods: Three sampling stations were selected from the Bashar River. Water samples from the surface were collected at all the sampling stations at monthly intervals for a period of one year. For phytoplankton 1 liter of water samples were collected from three different stations of the River and were kept in the sedimentation column after adding 2-3 ml of 4% formaldehyde solution. Results and Discussions: Mainly five groups of planktonic algae were recorded in the River. In the present river Bacillariophyceae was chiefly represented, while station I exhibited much higher percentage of Diatoms as compared to other stations. In the present investigation, Bacillariophyceae found to be dominant group at all the station. Fragilaria were present in considerable number at all the station.

Cette mémoire vise à analyser les processus de changement et de continuité dans la politique étrangère syrienne. En 2000, Bachar el-Assad a accédé au pouvoir après la mort d’Hafez el-Assad, en effectuant des réformes internes en matière du appareil économique et politique. Les changements qui ont eu lieu ont été limitées en regard l'aspect de la concentration du pouvoir, mais il y avait l'ouverture aux capitaux étrangers et la nomination de nouveaux technocrates qui ont étudié à l'étranger, ce qui conduit à une plus grande flexibilité en relation a la puissance militaire et politique très forte qui a duré pendant le gouvernement d'Hafez el-Assad. De plus, nous essayons de démontrer que le nouveau contexte international résultant des attentats du 11 septembre (2001) et le changement dans la géopolitique régionale avec l'invasion et l'occupation de l'Irak (2003) ont catalysé avec la possession de Bachar el-Assad une réorientation de politique étrangère, bien qu'en maintenant les principes politiques d'Hafez. C'est l'objectif de cette mémoire, par conséquent, d'examiner comment Bachar a travaillé avec de nouveaux obstacles imposés à la Syrie par l'intervention américaine au Moyen-Orient, aussi bien que l'influence politique syrienne dans les pays voisins. Esta dissertação propõe analisar os processos de mudança e continuidade na política externa síria. Em 2000, Bashar al-Assad ascende ao poder, após a morte de Hafez al-Assad, realizando reformas internas no que concerne ao aparato econômico e político. As mudanças ocorridas foram limitadas quanto ao aspecto da concentração de poder, porém houve abertura ao capital externo e a nomeação de novos tecnocratas com educação obtida no exterior, o que acarretou uma maior flexibilização em relação ao forte poder político militar que perdurou durante o governo de Hafez al-Assad. Ademais, procura-se demonstrar que o novo contexto internacional resultado dos ataques de 11 de setembro (2001) e a alteração da geopolítica regional com a invasão e a ocupação do Iraque (2003) catalisou junto à posse de Bashar al-Assad uma reorientação da política externa, apesar de manter os princípios políticos de Hafez. É do escopo desta dissertação, portanto, analisar como Bashar lidou com os novos obstáculos impostos à Síria pela intervenção norte-americana no Oriente Médio, assim como, a influência política síria nos países vizinhos. This dissertation aims to analyze the processes of change and continuity in Syrian foreign policy. In 2000, Bashar al-Assad ascends to the Syrian’s power after the death of his father Hafez al-Assad, with his promises of carrying out new internal reforms concerning the economic and political apparatus. The changes he had so far were limited, as the aspect of his concentration power, but there was openness to foreign capital and the appointment of new technocrats, with education obtained abroad leading to greater flexibility in relation to the strong military political power that lasted for the government Hafez al-Assad. In addition, the research demonstrated the new international context result from the 11 September (2001), and the change in regional geopolitics with the invasion and occupation of Iraq attacks (2003), catalyzed by the rise of Bashar al-Assad a reorientation of foreign policy while maintaining the political principles of Hafez. The scope of this dissertation also examine how Bashar dealt with new obstacles to Syria imposed by US intervention in the Middle East, as well the influence of Syria politics in the neighboring countries.