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Academic literature on the topic 'Masoko, Lac (Tanzanie)'
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Journal articles on the topic "Masoko, Lac (Tanzanie)"
Bergonzini, Laurent, Élisabeth Gibert, Anne Winckel, and Ouassila Merdaci. "Bilans hydrologique et isotopiques (18O et 2H) du lac Massoko, Tanzanie. Quantification des échanges lac–eaux souterraines." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 333, no. 10 (November 2001): 617–23. http://dx.doi.org/10.1016/s1251-8050(01)01672-x.
Full textDelalande, Manuella, Laurent Bergonzini, Frederic Beal, Yannick Garcin, Amos Majule, and David Williamson. "Contribution to the detection of Lake Masoko (Tanzania) groundwater outflow: isotopic evidence (18O, D) / Contribution à la détection des pertes souterraines du Lac Masoko (Tanzanie): évidences isotopiques (18O, D)." Hydrological Sciences Journal 50, no. 5 (October 2005). http://dx.doi.org/10.1623/hysj.2005.50.5.867.
Full textDissertations / Theses on the topic "Masoko, Lac (Tanzanie)"
Mesmay, Romain de. "Fonctionnement biogéochimique du lac Masoko (Tanzanie), approche par les biomarqueurs lipidiques sédimentaires." Aix-Marseille 2, 2008. http://theses.univ-amu.fr.lama.univ-amu.fr/2008AIX22034.pdf.
Full textLake Masoko (Rungwe Range, Tanzania) provides a continuous sedimentary record of environmental changes during the last 45,000 years. In this work, lipid biomarker content and their carbon isotopic composition (13C) from 10 selected sedimentary intervals allow paleoreconstruction of Lake Masoko since the last glacial period. Phytoplanktonic and bacterial biomarkers show high variability. Ten new structures of di- and mono-cyclic botryococcenes and partially reduced counterparts, triterpenoids specifically produced by Botrycoccus braunii B race, have been described for the first time in a 32 kyr BP interval. Their isotopic composition is highly enriched in 13C probably because of the use of bicarbonate as carbon source. Isotopic composition of n-alkanes shows that, in contrast with other records from tropical Africa, Lake Masoko surroundings are dominated by C3 land plants during the last 32,000 kyr BP. Lake Masoko could have been a refuge for biodiversity during glacial times. On the other hand, lipid biomarker content and their carbon isotopic composition from 18 sediment intervals covering the last 500 years offer a high resolution record for recent paleoenvironmental and anthropic changes. New very long chain C37 to C43 n-alkenes have been described for the first time in Lake Masoko sediments. Insects and other hypothetical producers of such alkenes have been discussed. Phytoplanktonic and bacterial biomarkers show rapid changes in lake ecosystem at decennial scale. Lacustrine productivity clearly increases during the last 500 years. Anthropic pressure on the ecosystem enhances lake productivity since 1940
Delalande, Manuëlla. "HYDROLOGIE ET GEOCHIMIE ISOTOPIQUE DU LAC MASOKO ET DE LACS VOLCANIQUES DE LA PROVINCE ACTIVE DU RUNGWE (SUD-OUEST TANZANIE)." Phd thesis, Université Paris Sud - Paris XI, 2008. http://tel.archives-ouvertes.fr/tel-00403009.
Full textDelalande, Manuëlla. "Hydrologie et géochimie isotopique du lac Masoko et de lacs volcaniques de la province active du Rungwe (Sud-Ouest Tanzanie)." Paris 11, 2008. https://tel.archives-ouvertes.fr/tel-00403009.
Full textLakes constitute potential and natural freshwater reservoir which are today not systematically considered anymore as simple pluviometer. Exchange and regulation places, lakes can be places of concentration where polluants accumulate or opposite places of dilution, which are favourable to the preservation of water ressources. This thesis focus on quantitative and qualitative aspects of the potential freswater reserve of Lake Masoko and others volcanic lakes of South West tanzanian few or never studied. This work gives evidence that the lake-levels and the balances of these systems are controlled by positive exchanges with atmosphere from which, result important groundwater fluxes. It was also shown that these mostly closed lakes constitute dilution places. These hydro-systems show also mineralisation degree and type, which appear control by first, the contribution of hydrothermal inflows to the lakes and secondly, by the lake water residence times. This hydrological and geochemical study of South West tanzanian lakes, under actual regional hydroclimatic conditions, allows to show that the mineralization degree of studied systems could rise under increase of precipitation rates or, decrease of evaporation rates; both in favour of the contribution of inflows to the lakes. Lake mineralization increases would be, in this region, linked to wet climatic conditions at YD and LGM whereas opposite interpretations are usually considered
Books on the topic "Masoko, Lac (Tanzanie)"
Gambarage, Joash J. Unmasking the Bantu Orthographic Vowels. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190256340.003.0019.
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