Abstract
Bioassays have been carried out with the green algae Scenedesmus crassus on samples of soft sediments collected along the river Lot (about fifty samples distributed over a 300 km length) in order to evaluate the phosphate bioavailability. From an other study, it was possible to know the percent of bottom surface covered by soft sediments. The link between the distribution of soft sediment and phosphate bioavailability leads to a longitudinal representation of the storage in the whole river. The results point out the parts of the river where bioavailable phosphate is stored and have implications for possible role of the stored phosphate in the eutrophication process in some areas of the river Lot.
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References
Cowen, W. F. & G. F. Lee, 1976. Phosphorus availability in particulate materials transported by urban runoff. J. Wat. Pollut. Cont. Fed., 48: 580–591.
Dauta, A., 1982. Conditions de développement du phytoplancton. Etude comparative de huit espèces en culture. I. Détermination des parametèrs de croissance en fonction de la lumière et de la température. Annls Limnol. 18: 217–262.
Dorich, R. A., D. W. Nelson & L. E. Sommer, 1980. Algal availability of sediments phosphorus in drainage water of the Black Creek watershed. J. Envir. Qual., 9: 557–563.
Dorich, R. A., D. W. Nelson & L. E. Sommer, 1984. Algal availability of phosphorus in suspended stream sediments of varying particle size. J. Envir. Qual. 13: 82–86.
Fink, A. & S. Santiago, 1991. Fertilité des sédiments en suspension comparée au moyen de biotest avec le phytoplancton naturel et Scenedesmus communis. Acres 3ème CILEF, Morges (Suisse), P. Vernet (ed.).
Golterman, H. L., C. L. Bakels & J. Jacobs-Mogelin, 1969. Availability of mud phosphates for algal growth. Verh. Int. Ver. Limnol., 17: 467–479.
Hanna, M. & A. Dauta, 1983. Bioassays: a comparative study of three parameters related to phosphorus bioavailability (yield, growth rate and intracellular concentration of phosphorus). Annls Limnol. 19: 59–66.
Massio, J. C., 1976. Facteurs d'évolution des matières en suspension minérales et organiques dans les eaux du Lot. Thèse de 3ème cycle, Toulouse, 122 pp.
Sharpley, A. N., R. G. Menzel, S. J. Smith, E. D. Rhoades & A. E. Olness, 1981. The sorption of soluble phosphorus by soil material during transport in runoff from cropped and grassed watersheds. J. Envir. Qual., 20: 235–238.
Stone, M. & M. C. English, 1993. Geochemical composition, phosphorus speciation and mass transport of fine-grained sediment in two lake Erie tributaries. Hydrobiologia, 253: 17–29. Proceedings of the Third International Workshop on Phosphorus in Sediments.
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Qotbi, A., Dauta, A., Sarpedonti, V. et al. Estimation of the available phosphate for phytoplankton stored in the soft sediments of the river Lot. Hydrobiologia 335, 49–53 (1996). https://doi.org/10.1007/BF00013682
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DOI: https://doi.org/10.1007/BF00013682