<?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%">Pons, Josep</style></author><author><style face="normal" font="default" size="100%">Pausas, Juli G.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The coexistence of acorns with different maturation patterns explains acorn production variability in cork oak.</style></title><secondary-title><style face="normal" font="default" size="100%">Oecologia</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">biomass</style></keyword><keyword><style  face="normal" font="default" size="100%">Evergreen oaks</style></keyword><keyword><style  face="normal" font="default" size="100%">Fruit</style></keyword><keyword><style  face="normal" font="default" size="100%">Fruit: growth &amp; development</style></keyword><keyword><style  face="normal" font="default" size="100%">Hypothesis</style></keyword><keyword><style  face="normal" font="default" size="100%">Masting</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean Region</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean woodlands</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus suber</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus: growth &amp; development</style></keyword><keyword><style  face="normal" font="default" size="100%">Weather</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2012///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/22246473</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">169</style></volume><pages><style face="normal" font="default" size="100%">723 - 731</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In dry areas such as Mediterranean ecosystems, fluctuations in seed production are typically explained by resource (water) availability. However, acorn production in cork oak (Quercus suber) populations shows a very low relationship to weather. Because cork oak trees produce acorns with different maturation patterns (annual and biennial), we hypothesized that acorn production in coexisting individuals with a different dominant acorn maturation type should respond differently to climatic factors and that disaggregating the trees according to their acorn-maturation pattern should provide a more proximal relation to weather factors. We assessed acorn production variability in fragmented cork oak populations of the eastern Iberian Peninsula by counting the total number of acorns in 155 trees during an 8-year period. An initial assessment of acorn production variability in relation to weather parameters yielded very low explained variance (7%). However, after the trees were grouped according to their dominant acorn maturation pattern, weather parameters were found to account for 44% of the variability in acorn crops, with trees with annual acorns exhibiting mast fruiting in years with reduced spring frost and shorter summer droughts and trees with biennial acorns showing the opposite pattern. Thus, conditions that negatively affect annual production could be beneficial for biennial production (and vice versa). The results highlight the importance of the resource-matching hypothesis for explaining acorn production in Quercus suber and suggest that different seed maturation types within a population may allow the species to deal with highly variable weather conditions. They also emphasize the importance of understanding acorn maturation patterns for interpreting masting cycles.</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;accession-num: 22246473</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%">Blanco Rodríguez, P.</style></author><author><style face="normal" font="default" size="100%">Vera Tomé, F.</style></author><author><style face="normal" font="default" size="100%">Lozano, J. C.</style></author><author><style face="normal" font="default" size="100%">Pérez Fernández, M. a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Transfer of 238U, 230Th, 226Ra, and 210Pb from soils to tree and shrub species in a Mediterranean area.</style></title><secondary-title><style face="normal" font="default" size="100%">Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Arboreal species</style></keyword><keyword><style  face="normal" font="default" size="100%">Fruit</style></keyword><keyword><style  face="normal" font="default" size="100%">leaves</style></keyword><keyword><style  face="normal" font="default" size="100%">Natural radionuclides</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil-to-plant transfer factors</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2010///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/20153657</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">68</style></volume><pages><style face="normal" font="default" size="100%">1154 - 1159</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The soil-to-plant transfer factors of natural uranium isotopes ((238)U and (234)U), (230)Th, (226)Ra, and (210)Pb were studied in a disused uranium mine located in the Extremadura region in the south-west of Spain. The plant samples included trees (Quercus ilex, Quercus suber, and Eucalyptus cameldulensis) and one shrub (Cytisus multiflorus). All of them are characteristic of Mediterranean environments. The activity concentrations in leaves and fruit were determined for the tree species at different stages of growth. For the shrub, the total above-ground fraction was considered in three seasons. For old leaves and fruit, the highest activity concentrations were found in Eucalyptus cameldulensis for all the radionuclides studied, except in the case of (230)Th that presented similar activity concentrations in all of the tree species studied. In every case, the transfer to fruit was less than the transfer to leaves. In the shrub, the results depended on the season of sampling, with the highest value obtained in spring and the lowest in autumn. Important correlations were obtained for (238)U and (226)Ra between the activity ratio in soils with that in leaves or fruit.</style></abstract><issue><style face="normal" font="default" size="100%">6</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;accession-num: 20153657</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%">García-mozo, Herminia</style></author><author><style face="normal" font="default" size="100%">Hidalgo, Pablo J.</style></author><author><style face="normal" font="default" size="100%">Galán, Carmen</style></author><author><style face="normal" font="default" size="100%">Gómez-Casero, Maria Teresa</style></author><author><style face="normal" font="default" size="100%">Domínguez, Eugenio</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Catkin frost damage in Mediterranean cork-oak (Quercus suber L.).</style></title><secondary-title><style face="normal" font="default" size="100%">Israel Journal of Plant Sciences</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CATKIN-bearing plants</style></keyword><keyword><style  face="normal" font="default" size="100%">Cork oak</style></keyword><keyword><style  face="normal" font="default" size="100%">flowers</style></keyword><keyword><style  face="normal" font="default" size="100%">Fruit</style></keyword><keyword><style  face="normal" font="default" size="100%">Phenology</style></keyword><keyword><style  face="normal" font="default" size="100%">PLANT spores</style></keyword><keyword><style  face="normal" font="default" size="100%">POLLEN (citation)</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2001</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2001///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://search.ebscohost.com/login.aspx?direct=true&amp;db=a9h&amp;AN=14592103&amp;lang=pt-br&amp;site=ehost-live&amp;scope=site</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">49</style></volume><pages><style face="normal" font="default" size="100%">41 - 47</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">During a period of study of floral phenology and pollen production in the cork-oak, Quercus suber L. (199799), an interruption of catkin development was detected in spring 1998. The cause might have been a sharp drop in minimum temperatures during that period, which coincided with the initial stages of microsporogenesis. Results show that environmental temperatures close to 0 ºC halted microsporogenesis and catkinelongation, resulting in their complete death. No fruits were observed in the affected zone, as a possible consequence of the lack of pollen. Phenological, histological, andaerobiological data are analyzed as a whole in order to gain a better understanding of the phenomenon. Cold spells during flowering may be one of the factors influencing the high interannual variability of acorn production in Quercus species. [ABSTRACT FROM AUTHOR]</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue><notes><style face="normal" font="default" size="100%">Accession Number: 14592103; García-Mozo, Herminia 1; Email Address: bv2gamoh@uco.es Hidalgo, Pablo J. 1 Galán, Carmen 1 Gómez-Casero, Maria Teresa 1 Domínguez, Eugenio 1; Affiliation: 1: Departamento de Biología Vegetal (División Botánica), Universidad de Córdoba, Campus Universitario Rabanales, Cordova CP-14071, Spain; Source Info: 2001, Vol. 49 Issue 1, p41; Subject Term: FLOWERS; Subject Term: PHENOLOGY; Subject Term: POLLEN; Subject Term: CORK oak; Subject Term: CATKIN-bearing plants; Subject Term: PLANT spores; Subject Term: FRUIT; NAICS/Industry Codes: 445230 Fruit and Vegetable Markets; NAICS/Industry Codes: 424480 Fresh Fruit and Vegetable Merchant Wholesalers; Number of Pages: 7p; Illustrations: 1 Black and White Photograph, 1 Chart, 2 Graphs; Document Type: ArticleAccession Number: 14592103; García-Mozo, Herminia 1; Email Address: bv2gamoh@uco.es Hidalgo, Pablo J. 1 Galán, Carmen 1 Gómez-Casero, Maria Teresa 1 Domínguez, Eugenio 1; Affiliation: 1: Departamento de Biología Vegetal (División Botánica), Universidad de Córdoba, Campus Universitario Rabanales, Cordova CP-14071, Spain; Source Info: 2001, Vol. 49 Issue 1, p41; Subject Term: FLOWERS; Subject Term: PHENOLOGY; Subject Term: POLLEN; Subject Term: CORK oak; Subject Term: CATKIN-bearing plants; Subject Term: PLANT spores; Subject Term: FRUIT; NAICS/Industry Codes: 445230 Fruit and Vegetable Markets; NAICS/Industry Codes: 424480 Fresh Fruit and Vegetable Merchant Wholesalers; Number of Pages: 7p; Illustrations: 1 Black and White Photograph, 1 Chart, 2 Graphs; Document Type: ArticleThe following values have no corresponding Zotero field:&lt;br/&gt;publisher: Laser Pages Publishing Ltd.</style></notes></record></records></xml>