<?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%">Simonson, William D</style></author><author><style face="normal" font="default" size="100%">Allen, Harriet D</style></author><author><style face="normal" font="default" size="100%">Coomes, David A</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Overstorey and topographic effects on understories: Evidence for linkage from cork oak (Quercus suber) forests in southern Spain</style></title><secondary-title><style face="normal" font="default" size="100%">Forest Ecology and Management</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Airborne lidar</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean</style></keyword><keyword><style  face="normal" font="default" size="100%">microclimate</style></keyword><keyword><style  face="normal" font="default" size="100%">Plant–plant interactions</style></keyword><keyword><style  face="normal" font="default" size="100%">Remote sensing</style></keyword><keyword><style  face="normal" font="default" size="100%">vegetation structure</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><volume><style face="normal" font="default" size="100%">328</style></volume><pages><style face="normal" font="default" size="100%">35-44</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The understorey is a critical feature of forest ecosystems, affecting nutrient cycling, biodiversity, regeneration capacity and wildfire regimes. Understanding the interaction of environmental and canopy controls on understorey development is therefore important for forest management. We use airborne lidar to elucidate this interaction in a forest of cork oak (Quercus suber) mixed with the deciduous oak (Quercus canariensis) on complex topographic relief in southern Spain. Solar radiation (controlled by aspect) and topographic position were highly influential in the differential distribution of the two dominant canopy trees, and exerted some control on their canopy density and height. There was a detectable effect of both canopy characteristics and solar radiation on the amount of understorey shrub cover, indicating direct and indirect controls of the environment on this stratum. In cork oak forest, understorey shrubbery increased towards valley bottoms, at lower levels of solar radiation and under shorter canopies. Our results are relevant to the management of these forest systems in the face of future change. They suggest that maturation and closure of these even-aged stands, coupled with climate warming, may lead to impoverishment of the shrub layer, reducing the build-up of fuel but also the biodiversity value of these systems.</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%">Gimeno, Teresa E.</style></author><author><style face="normal" font="default" size="100%">Pías, Beatriz</style></author><author><style face="normal" font="default" size="100%">Martínez-Fernández, Jesús</style></author><author><style face="normal" font="default" size="100%">Quiroga, David L.</style></author><author><style face="normal" font="default" size="100%">Escudero, Adrián</style></author><author><style face="normal" font="default" size="100%">Valladares, Fernando</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The decreased competition in expanding versus mature juniper woodlands is counteracted by adverse climatic effects on growth</style></title><secondary-title><style face="normal" font="default" size="100%">European Journal of Forest Research</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Juniperus thurifera</style></keyword><keyword><style  face="normal" font="default" size="100%">Plant–plant interactions</style></keyword><keyword><style  face="normal" font="default" size="100%">Radial growth</style></keyword><keyword><style  face="normal" font="default" size="100%">Spatial pattern</style></keyword><keyword><style  face="normal" font="default" size="100%">Woodland expansion</style></keyword><keyword><style  face="normal" font="default" size="100%">Woodlandisation</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><urls><web-urls><url><style face="normal" font="default" size="100%">http://link.springer.com/10.1007/s10342-011-0569-2http://www.springerlink.com/index/10.1007/s10342-011-0569-2</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">131</style></volume><pages><style face="normal" font="default" size="100%">977 - 987</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">World-wide deforestation is being reversed in Mediterranean continental areas, where abandonment of traditional practises favours the expansion of valuable habitats, like Juniperus thurifera woodlands. We hypothesised that pre-existing trees facilitate establishment in expanding woodlands, whereas in mature woodlands, competition leads to patch disaggregation. We compared the imprint of these processes on growth, demographic and spatial structure of expanding and mature J. thurifera woodlands. We selected plots where we geopositioned, aged and quantiﬁed the morphological characteristics of all trees. In the mature woodland, trees arranged in clumps and randomly in the expanding woodland. Competition negatively affected growth, was greater in the mature woodland and led to disaggregation of juvenile clumps. Differences in growth between the mature and the expanding woodland disappeared in climatically unfavourable years, suggesting that adverse climate constrains growth more in expanding than in mature woodlands. We suggest that change in the dispersal agents and a decrease of facilitation underlay differences in spatial patters between the expanding and the mature woodland. Observed effective recruitment in less than 30 years into the expanding woodland evidenced that propagule arrival and sapling survival do not constrain woodland expansion. Furthermore, growth of juveniles established in these new areas is favoured by reduced intraspeciﬁc competition. However, we expect growth in expanding woodlands to be negatively impacted by climate change. We conclude that under current global change scenario, conservation of J. thurifera woodlands is favoured by changes in land use, but greater frequency and severity of drier than usual episodes could hamper natural reforestation.</style></abstract><issue><style face="normal" font="default" size="100%">4</style></issue></record></records></xml>