<?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%">Tretiach, M</style></author><author><style face="normal" font="default" size="100%">Bolognini, G</style></author><author><style face="normal" font="default" size="100%">Rondi, A</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Photosynthetic activity of Quercus ilex at the extremes of a transect between Mediterranean and submediterranean vegetation (Trieste NE Italy)</style></title><secondary-title><style face="normal" font="default" size="100%">FLORA</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CO2</style></keyword><keyword><style  face="normal" font="default" size="100%">competition</style></keyword><keyword><style  face="normal" font="default" size="100%">Drought stress</style></keyword><keyword><style  face="normal" font="default" size="100%">Gradient</style></keyword><keyword><style  face="normal" font="default" size="100%">photos</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1997</style></year></dates><publisher><style face="normal" font="default" size="100%">GUSTAV FISCHER VERLAG</style></publisher><pub-location><style face="normal" font="default" size="100%">VILLENGANG 2, D-07745 JENA, GERMANY</style></pub-location><volume><style face="normal" font="default" size="100%">192</style></volume><pages><style face="normal" font="default" size="100%">369-378</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Microclimatic data and CO2 gas exchange rates were measured in the&lt;br/&gt;coastal area near Trieste (NE Italy) in two groups of plants rowing at&lt;br/&gt;the extremes of a floristic-vegetational gradient between an evergreen&lt;br/&gt;Mediterranean maquis on the coast and a winter deciduous&lt;br/&gt;submediterranean woodland on the Karst plateau, where Q. ilex persists&lt;br/&gt;only sporadically but is still a co-dominant tree.&lt;br/&gt;Field data were recorded from sunrise to sunset during the periods of&lt;br/&gt;highest productivity and of maximum physiological stress. i.e. high&lt;br/&gt;temperatures and water deficit in summer, and low temperatures and&lt;br/&gt;strong, dry winds in winter. Photosynthesis was measured with a portable&lt;br/&gt;Infrared Gas Analyzer.&lt;br/&gt;Microclimatic data showed that summer and winter stress were more&lt;br/&gt;intense on the Karst plateau. Assimilation of the coastal population was&lt;br/&gt;higher because a positive CO2 balance was maintained during both stress&lt;br/&gt;periods. During summer drought stress diurnal assimilation of the inland&lt;br/&gt;population was just in balance with nocturnal leaf respiration. In&lt;br/&gt;winter, on the contrary, photosynthetic activity ceased almost&lt;br/&gt;completely for almost a week, due to the lower temperature regime and to&lt;br/&gt;strong, dry winter winds that caused severe mechanical damages and, more&lt;br/&gt;generally, a drastic shortening of the leaf life span.&lt;br/&gt;The competition ability of Q. ilex in ecotonal areas is briefly&lt;br/&gt;discussed on the basis of these results. Winter stress seems to be the&lt;br/&gt;main factor limiting the distribution of Q. ilex northwards.</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%">Espigares, T.</style></author><author><style face="normal" font="default" size="100%">Peco, B.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Mediterranean pasture dynamics: the role of germination</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%">Autumn rain</style></keyword><keyword><style  face="normal" font="default" size="100%">Gradient</style></keyword><keyword><style  face="normal" font="default" size="100%">Phytotron</style></keyword><keyword><style  face="normal" font="default" size="100%">seed bank</style></keyword><keyword><style  face="normal" font="default" size="100%">Temperature</style></keyword><keyword><style  face="normal" font="default" size="100%">Weather fluctuation</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1993</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1993///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://onlinelibrary.wiley.com/doi/10.2307/3236104/full</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">4</style></volume><pages><style face="normal" font="default" size="100%">189 - 194</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">pastures were arranged along a gradient of sensitivity to temperature on the arrival of the first persistent rain. This sensitivity was manifested in both the total germination success of the species and the germination time profile. The different germination patterns of the species can provide competitive advantages depending on the autumn weather conditions.</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue></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%">Espigares, T</style></author><author><style face="normal" font="default" size="100%">Peco, B</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Mediterranean pasture dynamics: the role of germination</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%">Autumn rain</style></keyword><keyword><style  face="normal" font="default" size="100%">Gradient</style></keyword><keyword><style  face="normal" font="default" size="100%">Phytotron</style></keyword><keyword><style  face="normal" font="default" size="100%">seed bank</style></keyword><keyword><style  face="normal" font="default" size="100%">Temperature</style></keyword><keyword><style  face="normal" font="default" size="100%">Weather fluctuation</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1993</style></year></dates><volume><style face="normal" font="default" size="100%">4</style></volume><pages><style face="normal" font="default" size="100%">189-194</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">pastures were arranged along a gradient of sensitivity to temperature on the arrival of the first persistent rain. This sensitivity was manifested in both the total germination success of the species and the germination time profile. The different germination patterns of the species can provide competitive advantages depending on the autumn weather conditions.</style></abstract></record></records></xml>