<?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%">Chaideftou, Evgenia</style></author><author><style face="normal" font="default" size="100%">Thanos, Costas A.</style></author><author><style face="normal" font="default" size="100%">Bergmeier, Erwin</style></author><author><style face="normal" font="default" size="100%">Kallimanis, Athanasios S.</style></author><author><style face="normal" font="default" size="100%">Dimopoulos, Panayotis</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The herb layer restoration potential of the soil seed bank in an overgrazed oak forest</style></title><secondary-title><style face="normal" font="default" size="100%">JOURNAL OF BIOLOGICAL RESEARCH-THESSALONIKI</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">dispersal mode</style></keyword><keyword><style  face="normal" font="default" size="100%">Grazing</style></keyword><keyword><style  face="normal" font="default" size="100%">herb layer restoration</style></keyword><keyword><style  face="normal" font="default" size="100%">life strategy type</style></keyword><keyword><style  face="normal" font="default" size="100%">sub Mediterranean forest</style></keyword><keyword><style  face="normal" font="default" size="100%">Wood pasture</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2011///</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">15</style></volume><pages><style face="normal" font="default" size="100%">47 - 57</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We investigated the potential contribution of the persistent soil seed bank in post-disturbance restoration of the herb layer in a long-term overgrazed, mixed oak forest (NW Greece). We examined the impacts of grazing on plant richness and density in the soil seed bank in regard to the different dispersal and life strategy types of the herb layer taxa. Soil seed bank was qualitatively and quantitatively analyzed and contrasting plant guilds were defined according to life strategy type and dispersal mode. Soil seed bank differences between a) the upper and lower soil layers and b) plant functional guild pairs (ruderals vs. non ruderals, including typical forest taxa, and physically-vs. animal-dispersed plants) were statistically tested in overgrazed and sporadically grazed plots. Moreover, correlations in soil seed bank species dominance between overgrazed and sporadically grazed plots were examined by Spearman's Rank correlation. The majority of seeds were found in the upper (0-5 cm) soil layer. Seed density in the deeper (5-10 cm) soil layer was rather poor and did not differ significantly between overgrazed and sporadically grazed plots. In the upper soil layer, both seed density and plant species richness were significantly lower in the overgrazed plots. Overgrazing reduced both species richness and seed density of non-ruderal species in general and typical forest herbs in particular, while it did not affect ruderal species richness and density. Plant species richness and seed density of animal-dispersed taxa were reduced by overgrazing while physically-dispersed species were not affected; it is therefore concluded that large herds of grazers fenced in relatively small areas cannot act as efficient dispersal vectors of the former species. Our findings suggest that, upon cessation of grazing, the soil seed bank is rather inadequate to restore the herb layer of overgrazed forest sites.</style></abstract><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;pub-location: ADMIN BLDG, 6TH FLOOR, THESSALONIKI, GR-540 06, GREECE&lt;br/&gt;publisher: ARISTOTLE UNIV THESSALONIKI</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%">Chaideftou, Evgenia</style></author><author><style face="normal" font="default" size="100%">Thanos, Costas A.</style></author><author><style face="normal" font="default" size="100%">Bergmeier, Erwin</style></author><author><style face="normal" font="default" size="100%">Kallimanis, Athanasios</style></author><author><style face="normal" font="default" size="100%">Dimopoulos, Panayotis</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Seed bank composition and above-ground vegetation in response to grazing in sub-Mediterranean oak forests (NW Greece)</style></title><secondary-title><style face="normal" font="default" size="100%">Plant Ecology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">á ruminants</style></keyword><keyword><style  face="normal" font="default" size="100%">Deciduous oak forests</style></keyword><keyword><style  face="normal" font="default" size="100%">deciduous oak forests á</style></keyword><keyword><style  face="normal" font="default" size="100%">grazing á browsing á</style></keyword><keyword><style  face="normal" font="default" size="100%">Grazing Browsing</style></keyword><keyword><style  face="normal" font="default" size="100%">greece</style></keyword><keyword><style  face="normal" font="default" size="100%">greece á wild boar</style></keyword><keyword><style  face="normal" font="default" size="100%">Ruminants</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil seed bank</style></keyword><keyword><style  face="normal" font="default" size="100%">soil seed bank á</style></keyword><keyword><style  face="normal" font="default" size="100%">Wild boar</style></keyword><keyword><style  face="normal" font="default" size="100%">Wood pasture</style></keyword><keyword><style  face="normal" font="default" size="100%">wood pasture á</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><volume><style face="normal" font="default" size="100%">201</style></volume><pages><style face="normal" font="default" size="100%">255-265</style></pages><isbn><style face="normal" font="default" size="100%">1125800895</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We investigate the persistent soil seed bank composition and its relation to the above-ground ﬂora of grazed and non-grazed sub-Mediterranean deciduous oak forests of NW Greece. Twenty-eight taxa were recorded in the soil seed bank and 83 taxa (70 taxa in plots of seed bank sampling) in the aboveground vegetation. The dominant tree species and many woodland species found in the above-ground vegetation were absent from the soil seed bank. Similarity between the soil seed bank and the aboveground vegetation decreased with grazing, and grazing led to a decrease of species richness in above-ground vegetation and soil seed bank. Beta diversity of vegetation among grazed and among nongrazed plots did not differ, but was signiﬁcantly higher between grazed and non-grazed areas. Beta diversity of the soil seed bank declined with grazing. When applying classiﬁcation tree and logistic regression analyses, non-grazed forest sites are clearly differentiated by the presence of Phillyrea latifolia, Euphorbia amygdaloides and Brachypodium sylvaticum. PCA ordination of above-ground species composition reﬂected a gradient from sites grazed by ruminants to non-grazed sites, but no clear structure was detected in the seed bank.</style></abstract></record></records></xml>