<?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%">Panaiotis, C</style></author><author><style face="normal" font="default" size="100%">Loisel, R</style></author><author><style face="normal" font="default" size="100%">Roux, M</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Analysis of vegetation response to naturally occurring gaps in old-growth forests of Quercus ilex L. in Corsica</style></title><secondary-title><style face="normal" font="default" size="100%">CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">natural gaps</style></keyword><keyword><style  face="normal" font="default" size="100%">quercus ilex forest</style></keyword><keyword><style  face="normal" font="default" size="100%">spatial structure</style></keyword><keyword><style  face="normal" font="default" size="100%">vegetation succession</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1998</style></year></dates><publisher><style face="normal" font="default" size="100%">NATL RESEARCH COUNCIL CANADA</style></publisher><pub-location><style face="normal" font="default" size="100%">RESEARCH JOURNALS, MONTREAL RD, OTTAWA, ONTARIO K1A 0R6, CANADA</style></pub-location><volume><style face="normal" font="default" size="100%">28</style></volume><pages><style face="normal" font="default" size="100%">1125-1134</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Green oak (Quercus ilex L.) is the most common forest species growing under Mediterranean climate. Because of important past anthropic perturbations, green oak old-growth forests are very unfrequent and constitute, for that reason, a most interesting domain where to analyze the natural evolution of green oak stands. Such forests exist in Corsica and this study deals with vegetation successions as they occur in naturally occuring gaps. Because of the taxonomic poorness (32 species), two statistical tools (canonical correspondence analysis and random permutations) were used to take into account vegetation spatial structure according to types (herbaceous, shrubby, or arborescent). These statistical analyses show that plant succession does not really exist in gaps of green oak old-growth forests but rather a structural organization of common species found in the maquis. Results support the hypothesis about the internal dynamics of these forests going through a maquis phase.</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%">Panaiotis, C</style></author><author><style face="normal" font="default" size="100%">Carcaillet, C</style></author><author><style face="normal" font="default" size="100%">M'Hamedi, M</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Determination of the natural mortality age of an holm oak ( Quercus ilex L.) stand in Corsica (Mediterranean Island)</style></title><secondary-title><style face="normal" font="default" size="100%">Acta Oecologica</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Corsica</style></keyword><keyword><style  face="normal" font="default" size="100%">Dendrochronology</style></keyword><keyword><style  face="normal" font="default" size="100%">Forest structure</style></keyword><keyword><style  face="normal" font="default" size="100%">mediterranean forest</style></keyword><keyword><style  face="normal" font="default" size="100%">natural mortality</style></keyword><keyword><style  face="normal" font="default" size="100%">old forest</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus ilex</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1997</style></year></dates><volume><style face="normal" font="default" size="100%">18</style></volume><pages><style face="normal" font="default" size="100%">519-530</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Determination of old forest stand age and forestry history is problematic due to the difficulties which arise in obtaining core samples from trees. In the present paper, the natural mortality age and forestry history of a Corsican holm oak stand are estimated using the methods described below. Firstly, the correlation between stem age estimated from healthy stump counts in fellings and stem diameter is determined using a second order polynomial equation. Secondly, the distribution of stand diameter classes is analyzed by the BHATTACHARYA (1967) method. This method allows the identifica- tion of cohorts as well as the estimation of cohort mean diameters and theoretical tree count numbers. Using cohort mean diameters, we are able to estimate their age and discuss stand forestry history. Finally, the analysis of thirty broken stumps originating from senescent holm oak natural falls, is used to determine the mean natural mortality age of trees bused on their mean diameter. This natural mor- tality is estimated to occur at 170 -+ 46 years of age. The causes of holm oak mortality and the capacity of old stumps to renew the ecosystem are discussed in order to contribute to the conservation and man- agement of these woodland communities.</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%">Panaiotis, C</style></author><author><style face="normal" font="default" size="100%">Loisel, R</style></author><author><style face="normal" font="default" size="100%">Paradis, G</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Dating natural gaps in the holm oak forest (Quercus ilex L) in Fango MAB Reserve (Corsica) by reading rings of maquis components</style></title><secondary-title><style face="normal" font="default" size="100%">Ann. For. Sci.</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Corsica</style></keyword><keyword><style  face="normal" font="default" size="100%">Dendrochronology</style></keyword><keyword><style  face="normal" font="default" size="100%">Maquis</style></keyword><keyword><style  face="normal" font="default" size="100%">natural gap</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus ilex</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1995</style></year></dates><volume><style face="normal" font="default" size="100%">52</style></volume><pages><style face="normal" font="default" size="100%">477-487</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">This work is related to the study of natural gaps in a Quercus ilex Mediterranean forest in Corsica, France. The aim was to find a way to precisely date the volis to obtain a chronological sample which corresponded to the time of vegetation opening due to the fall of a holm oak and up to complete vegetation closure. The best marker appeared to be Phillyrea latifolia, a typical maquis tree found in association with the holm oak, which has a high capacity to produce stem sprouts after the breakage. In order to date the chablis, rings from the stem sprouts must be counted and a careful observation of the other species must be made to confirm results.</style></abstract></record></records></xml>