<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ceballos Barbancho, A.</style></author><author><style face="normal" font="default" size="100%">Shanabel, S.</style></author><author><style face="normal" font="default" size="100%">Cerdà, A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Estudio de la variabilidad temporal y espacial de la pérdida de suelo en la dehesa (Extremadura, SO España) mediante lluvia simulada</style></title><secondary-title><style face="normal" font="default" size="100%">Geographicalia</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Dehesa</style></keyword><keyword><style  face="normal" font="default" size="100%">rainfall simulation</style></keyword><keyword><style  face="normal" font="default" size="100%">runoff</style></keyword><keyword><style  face="normal" font="default" size="100%">Season</style></keyword><keyword><style  face="normal" font="default" size="100%">sediment concentration</style></keyword><keyword><style  face="normal" font="default" size="100%">soil loss</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2002</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2002///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dialnet.unirioja.es/servlet/articulo?codigo=257338</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">41</style></volume><pages><style face="normal" font="default" size="100%">19 - 36</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The inain objective of this paper is to study the influence of the seasonal variability of tlze antecedent conditions in soil losses in a dehesa ecosystem, as well as an approach to its spatial variability. The experimental layout includes forty rainfall simulation experiments carried out in two different situa- tions: first on dry conditions, with degraded vegetation, and, second on wet con- ditions, with an important vegetation cover. The results indicate that the highest sediiilent concentrations are located in situations with bare soils, due to the effect of the drought and the soil remo- ved by grazing animals. The control of the process depends more to tlie sediment available on the soil surface than to the runoff transport capacity. From an spatial point of view, it liighlights the contrast between tlie low los- ses registered in the valley bottoms and the highest values measured in tlie areas more frequented by the livestock, where the degradation of the vege- tation cover and the removal of tlie soil material are continuous. Finally, although the rate of soil loss in the dehesa is low, it is important froin a qua- litative point of view because it affects to the inost fertile horizon in the soil profile</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ceballos Barbancho, A</style></author><author><style face="normal" font="default" size="100%">Shanabel, S</style></author><author><style face="normal" font="default" size="100%">Cerdá, A</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Estudio de la variabilidad temporal y espacial de la pérdida de suelo en la dehesa (Extremadura, SO España) mediante lluvia simulada</style></title><secondary-title><style face="normal" font="default" size="100%">Geographicalia</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Dehesa</style></keyword><keyword><style  face="normal" font="default" size="100%">rainfall simulation</style></keyword><keyword><style  face="normal" font="default" size="100%">runoff</style></keyword><keyword><style  face="normal" font="default" size="100%">Season</style></keyword><keyword><style  face="normal" font="default" size="100%">sediment concentration</style></keyword><keyword><style  face="normal" font="default" size="100%">soil loss</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><volume><style face="normal" font="default" size="100%">41</style></volume><pages><style face="normal" font="default" size="100%">19-36</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The inain objective of this paper is to study the influence of the seasonal variability of tlze antecedent conditions in soil losses in a dehesa ecosystem, as well as an approach to its spatial variability. The experimental layout includes forty rainfall simulation experiments carried out in two different situa- tions: first on dry conditions, with degraded vegetation, and, second on wet con- ditions, with an important vegetation cover. The results indicate that the highest sediiilent concentrations are located in situations with bare soils, due to the effect of the drought and the soil remo- ved by grazing animals. The control of the process depends more to tlie sediment available on the soil surface than to the runoff transport capacity. From an spatial point of view, it liighlights the contrast between tlie low los- ses registered in the valley bottoms and the highest values measured in tlie areas more frequented by the livestock, where the degradation of the vege- tation cover and the removal of tlie soil material are continuous. Finally, although the rate of soil loss in the dehesa is low, it is important froin a qua- litative point of view because it affects to the inost fertile horizon in the soil profile</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Soler, Montserrat</style></author><author><style face="normal" font="default" size="100%">Sala, Maria</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effects of fire and of clearing in a Mediterranean Quercus ilex woodland: An experimental approach</style></title><secondary-title><style face="normal" font="default" size="100%">CATENA</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">disturbance regimes (PG)</style></keyword><keyword><style  face="normal" font="default" size="100%">evergreen oak woodlands</style></keyword><keyword><style  face="normal" font="default" size="100%">Nutrient losses</style></keyword><keyword><style  face="normal" font="default" size="100%">soil loss</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1992</style></year></dates><volume><style face="normal" font="default" size="100%">19</style></volume><pages><style face="normal" font="default" size="100%">321-332</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The object of the study is to compare the importance of soil and nutrient losses from plots in an ever green oak (Quercus ilex) woodland under different environmental conditions; namely under undisturbed forest and at sites that had been clear felled and burnt under controlled conditions. At each site, the plots were instrumented with 10 Gerlach troughs located at the footslope of each plot, and with 12 troughs in the upper part of the burned plot inserted at regular intervals from the water divide. Raingauges were subsequently added and data on rainfall intensity collected at a nearby station. Results indicate that burning has a significant effect with respect to runoff and nutrient and sediment losses. The impact of clear-felling is much less. Sediment transport on the slope is not only caused by surface runoff but by other agents of erosion as well.</style></abstract></record></records></xml>