<?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%">Puerto Martín, A</style></author><author><style face="normal" font="default" size="100%">Puerto, A</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">FITOMASA SUBTERRÁNEA Y AÉREA EN PASTOS DE DEHESA</style></title><secondary-title><style face="normal" font="default" size="100%">Pastos</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">España</style></keyword><keyword><style  face="normal" font="default" size="100%">fitomasa</style></keyword><keyword><style  face="normal" font="default" size="100%">Grasslands</style></keyword><keyword><style  face="normal" font="default" size="100%">influencia del arbolado</style></keyword><keyword><style  face="normal" font="default" size="100%">ladera</style></keyword><keyword><style  face="normal" font="default" size="100%">pastos</style></keyword><keyword><style  face="normal" font="default" size="100%">phytomass</style></keyword><keyword><style  face="normal" font="default" size="100%">Salamanca</style></keyword><keyword><style  face="normal" font="default" size="100%">Salamanca (Spain)</style></keyword><keyword><style  face="normal" font="default" size="100%">slope</style></keyword><keyword><style  face="normal" font="default" size="100%">tree canopy ¡nfluence</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1992</style></year></dates><volume><style face="normal" font="default" size="100%">22</style></volume><pages><style face="normal" font="default" size="100%">3-19</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">A study has been conducted on the spatial variations undergone by root biomass, aerial phytomass and the root/shoot ratio in grassland communities (dehesa systems). These variations are governed by the prevailing gradients: topographic and the effect of the tree canopy. The greatest biomass, both underground and aerial, and the lowest root/shoot ratio are usually found in the more fertile sites (deposition sector of slope) and shaded áreas (under the crowns of the trees), in contrast to the results of some researchs performed in cultures or at the laboratory. In the case of natural or semi-natural groupings of herba- ceous species in severe environments, the adaptive responses of each species appear to predomínate over any generalized type of response. Key</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%">González Bernáldez, F</style></author><author><style face="normal" font="default" size="100%">Díaz Pineda, F</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Bases para la tipificación integrada de los pastizales de dehesa</style></title><secondary-title><style face="normal" font="default" size="100%">Pastos</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">geosistema (voyant)</style></keyword><keyword><style  face="normal" font="default" size="100%">ladera</style></keyword><keyword><style  face="normal" font="default" size="100%">pastizales</style></keyword><keyword><style  face="normal" font="default" size="100%">Sistema Central</style></keyword><keyword><style  face="normal" font="default" size="100%">tipificación integrada</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1980</style></year></dates><volume><style face="normal" font="default" size="100%">10</style></volume><pages><style face="normal" font="default" size="100%">20-43</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Rational use of seminatural rangeland requires integrated surveys and tipification. These rely upon a synthesis of characteristics of the geosystems underlying such natural complexes. Although there are different possible procedures, it is important that integrated typolo- gies reflect the most important geosystemic features, according to funcional, structural and genetic criteria. Homologies should clearly appear even when floristically unrelated áreas are considered (Mediterranean, California, Australia, etc.). Integration criteria specified by four dimensions or aspects are described. These have been rried by the authors in rangeland áreas of Center and the Southwest of the Iberian Península and are: Equipotenciality (zonality): related to position in gradients, altitudinal zones, northern and southern slopes, radiation patterns. Vectoriality: related to position in the dynamical system of interfluve and channel and slope dynamics. Mosaicity (azonality, cellularity): appartenence to roughly isodiametric patterns superposed to the forms and uncorrelated with them. Successional dinamicity: related to succesional changes normally conditioned by range management. Most of the differentiated features tend to recur within the landscape thus facüitating survey and mapping</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%">Gomez Gutiérrez, J M</style></author><author><style face="normal" font="default" size="100%">Puerto Martín, A</style></author><author><style face="normal" font="default" size="100%">Calabuig, E L</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Distribución de la vegetación en una ladera sometida a riego temporal</style></title><secondary-title><style face="normal" font="default" size="100%">Pastos</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">aridez (voyant)</style></keyword><keyword><style  face="normal" font="default" size="100%">disponibilidad hídrica</style></keyword><keyword><style  face="normal" font="default" size="100%">encharcamiento</style></keyword><keyword><style  face="normal" font="default" size="100%">ladera</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1976</style></year></dates><volume><style face="normal" font="default" size="100%">6</style></volume><pages><style face="normal" font="default" size="100%">278-295</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">A quantitative analysis of the vegetation on a slope of a &quot;dehesa&quot; of Salamanca pro- vince has been made for the purposes of observing the effects of temporal irrigation. The 17 samples takings that were made included the presence of a total of 102 species whose abundance was studied by means of the analysis of correspondances. The first 3 components, which cover 47,21 % of the variance, are deduced and are interpreted from the analysis; the first as reflecting the access to water, the second as representative of the retention of water. The third seems to be related to the similarity between samplings. In the plañe defined by the first and second components, three zones became apparent; these were identified as swamping, aridity and an intermediate zone between these two. This intermediate zone is formed in the vértex of the directions of the other two which may be schematically represented as two linear trajectories which have the form of lines regres- sion and of which the coefficient of correlation are significantly different of zero. PASTOS</style></abstract></record></records></xml>