<?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%">Gómez-Aparicio, LORENA</style></author><author><style face="normal" font="default" size="100%">Gómez, Jose M.</style></author><author><style face="normal" font="default" size="100%">Zamora, Regino</style></author><author><style face="normal" font="default" size="100%">Boettinger, Janis L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Canopy vs. soil effects of shrubs facilitating tree seedlings in Mediterranean montane ecosystems</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Vegetation Science</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Nurse shrub</style></keyword><keyword><style  face="normal" font="default" size="100%">Positive interaction</style></keyword><keyword><style  face="normal" font="default" size="100%">Potassium</style></keyword><keyword><style  face="normal" font="default" size="100%">Removal experiment</style></keyword><keyword><style  face="normal" font="default" size="100%">shade</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2005</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2005///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1111/j.1654-1103.2005.tb02355.x</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">16</style></volume><pages><style face="normal" font="default" size="100%">191 - 198</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Abstract. Question: Is the facilitative effect of nurse shrubs on early recruitment of trees mediated by a ‘canopy effect’(microclimate amelioration and protection from herbivores), a ‘soil effect’(modification of soil properties), or both? Location: Two successional montane shrublands at the Sierra Nevada Protected Area, SE Spain. Method: Seedlings of Quercus and Pinus species were planted in four experimental treatments: (1) under shrubs; (2) in open interspaces without vegetation; (3) under shrubs where the canopies were removed; (4) in open interspaces but covering seedlings with branches, mimicking a shrub canopy. Results: Both effects benefited seedling performance. However, microclimatic amelioration due to canopy shading had the strongest effect, which was particularly pronounced in the drier site. Below-ground, shrubs did not modify soil physical characteristics, organic matter, total N and P, or water content, but significantly increased available K, which has been shown to improve seedling water-use efficiency under drought conditions. Conclusions: We propose that in Mediterranean montane ecosystems, characterised by a severe summer drought, pioneer shrubs represent a major safe site for tree early recruitment during secondary succession, improving seedling survival during summer by the modification of both the above-and below-ground environment.</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;publisher: Blackwell Publishing Ltd</style></notes></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%">Milla, R.</style></author><author><style face="normal" font="default" size="100%">Castro-Díez, P.</style></author><author><style face="normal" font="default" size="100%">Maestro-Martínez, M.</style></author><author><style face="normal" font="default" size="100%">Montserrat-Martí, G.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Does the Gradualness of Leaf Shedding Govern Nutrient Resorption from Senescing Leaves in Mediterranean Woody Plants?</style></title><secondary-title><style face="normal" font="default" size="100%">Plant and Soil</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">leaf shedding phenology</style></keyword><keyword><style  face="normal" font="default" size="100%">nutrient retranslocation</style></keyword><keyword><style  face="normal" font="default" size="100%">nutrient status</style></keyword><keyword><style  face="normal" font="default" size="100%">Potassium</style></keyword><keyword><style  face="normal" font="default" size="100%">resorption efficiency</style></keyword><keyword><style  face="normal" font="default" size="100%">resorption proficiency</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2005</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2005///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com/index/10.1007/s11104-005-8770-z</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">278</style></volume><pages><style face="normal" font="default" size="100%">303 - 313</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The resorption of nutrients from senescing leaves is a key component of the nutrient conservation strategy of plants. Despite its relevance, the regulation of the eﬃciency of this process is poorly understood. The aim of this work was to test the hypothesis that species that shed leaves gradually along the year are less eﬃcient reabsorbing nutrients from senescing leaves than species that shed leaves in a short period. N-, P-, and Kresorption-eﬃciencies were measured in 11 Mediterranean species and regressed against an index of the gradualness of leaf shedding. Additionally, the bivariate relations among leaf nutrient content before senescence, nutrient content in senesced leaves, pool of nutrients reabsorbed during senescence, and nutrient resorption eﬃciency, were examined. K-resorption-eﬃciency was markedly lower in species with protracted leaf-shedding, in agreement with the initial hypothesis. This pattern was less signiﬁcant for Nand P-resorption-eﬃciencies. When leaf nutrient content before senescence was high, the amount of nutrients reabsorbed and the amount of nutrients in senesced leaves were high. Consequently, nutrient resorption eﬃciency was unaﬀected by the leaf nutrient status before senescence. It is concluded that the leaf shedding pattern per se inﬂuences nutrient resorption in Mediterranean perennials, irrespective of additional environmental controls. Furthermore, it is suggested that plants diﬀering in nutrient status do not exhibit diﬀerent nutrient resorption eﬃciencies because the nutrient content of leaves before senescence aﬀects the components of resorption eﬃciency in countervailing ways.</style></abstract><issue><style face="normal" font="default" size="100%">1-2</style></issue></record></records></xml>