RT Journal Article
T1 Factors controlling phosphorus speciation in a Mediterranean basin (River Guadalfeo, Spain)
A1 Avilés-Benítez, Antonio
A1 Rodero, Jesús
A1 Amores, Victoria
A1 Rodríguez, M. Isabel
A1 Niell-Castanera, Francisco Javier
K1 Fósforo - Mediterráneo (Región)
AB There is a lot of interest nowadays in the role of riverbed sediments in phosphorus cycling and particularly, in the processes that lead the exchange of phosphorus between the sediment and the water column. This study presents results on phosphorus forms and other properties from surface riverbed sediments of the River Guadalfeo and its main tributaries. Results show a wide range of spatial variability within the basin with differences of phosphorus concentration higher than an order of magnitude among different sites. The most abundant form is the apatite inorganic phosphorus (AIP) which accounts for 68 % of total phosphorus followed by total organic phosphorus (OP) that represents 29 %. The high oversaturation of calcite reached during the summer and early autumn in most studied rivers, accounts for the dominance of AIP form in the sediment and should prove the importance of calcite-phosphorus co-precipitation as a self-cleansing mechanism that removes phosphorus from the water column. External factors such as the lithology of drainage area and sewage inputs are less important in the concentration of sediment phosphorus than physico-chemical and biological processes that take place in the rivers. Taking into account the low biodegradable characteristics of dominant phosphorus forms, it could be concluded that the surface sediment in the Guadalfeo basin acts as a phosphorus sink.
PB Elsevier
YR 2006
FD 2006-12-15
LK https://hdl.handle.net/10630/37361
UL https://hdl.handle.net/10630/37361
LA eng
NO A. Avilés, J. Rodero, M.V. Amores, I. de Vicente, M. Rodríguez y F.X. Niell (2006). ‘Factors controlling phosphorus speciation in a mediterranean basin (river guadalfeo, spain)’, Journal of Hydrology, 331: 396-408
NO This research was supported by the covenant “Estudio Piloto para la Gestión Integrada de la Cuenca Hidrográfica del Río Guadalfeo” between the Junta de Andalucía and the University of Granada, and by the project REN2002-00340/MAR of the Spanish Commission of Science and Technology Inter-Ministry. We would like to thank Drs. L. Cruz-Pizarro and E. Moreno-Ostos for their help in sampling trips.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026