2024-03-29T07:06:27Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/221902019-08-06T10:18:41Zcom_10261_50com_10261_8com_10261_12col_10261_303col_10261_265
Nutrient contents and export from streams in semiarid catchments of central Spain
Álvarez Cobelas, Miguel
Sánchez Andrés, Raquel
Sánchez Carrillo, Salvador
Angeler, D. G.
Environmental factors
In stream processes
Land use
Landscape factors
Soils
Spatio temporal scales
13 pages, figures, and tables statistics.
Thirty five catchments in semiarid Central Spain were monitored monthly in late winter and spring to
search for relationships between environmental variables (sedimentary nutrients and hydrological
topographical, geological, pedological, land use factors) and nutrient concentrations and exports. Results
enabled to outline differences between semiarid and moist catchments, the latter drawn from other
studies. While land use, topography and ecotone features explained an important fraction of overall
variance of nutrients in moist areas, geological and pedological features were much better descriptors in
semiarid catchments. Runoff explained most variability of total carbon, organic carbon and nitrogen
export, and soil types and carbon and phosphorus contents stored in stream sediments best explained
total phosphorus, dissolved- and particulate organic carbon export in semiarid catchments. In moist
catchments geology, climate, pedology and land use were shown to influence nutrient export. Hydrology
potentially swamped effects related to land use and landscape structure (i.e. topographical, geological
and soil factors). Thus nutrient concentration and export in semiarid catchments deviate from those in
moist catchments which is due to the overriding effects of hydrological features, geology and pedology.
Further research, including the application of combined GIS techniques and modeling approaches, is
needed to generalize our findings over other semiarid areas.
2010-03-10T10:47:59Z
2010-03-10T10:47:59Z
2010-06-11
artículo
Journal of Arid Environments: 1-13 (2010)
0140-1963
http://hdl.handle.net/10261/22190
10.1016/j.jaridenv.2010.01.02
eng
http://dx.doi.org/10.1016/j.jaridenv.2010.01.002
closedAccess
Elsevier