<?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%">Gade, Daniel W.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Parsons on Pigs and Acorns*</style></title><secondary-title><style face="normal" font="default" size="100%">Geographical Review</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">acorns</style></keyword><keyword><style  face="normal" font="default" size="100%">Dehesa</style></keyword><keyword><style  face="normal" font="default" size="100%">Iberian ham (voyant)</style></keyword><keyword><style  face="normal" font="default" size="100%">Oak woodland</style></keyword><keyword><style  face="normal" font="default" size="100%">pigs</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://doi.wiley.com/10.1111/j.1931-0846.2010.00060.x</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">100</style></volume><pages><style face="normal" font="default" size="100%">598 - 606</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Many articles in the Geographical Review hold stories that resonate in the history of geography only when the passage of time provides the necessary detachment to put these accounts into a context of larger signiﬁcance. The circumstances behind the selection of a particular topic, vicissitudes of the research phase, personality of the author, and exchanges during the editorial process that bring it to publication together provide insight into the diﬀerent layers of geographical scholarship. To all that can be added another dimension: explaining the impact that the piece of writing has had on individuals who have read it. One article in the Geographical Review profoundly aﬀected the formation of my geographical imagination. It did so without appealing to any theory, showcasing some dazzling new technique, harboring an advocacy agenda, or exhorting the reader in any way. Now, nearly half a century after its publication, this text opened another level of reﬂection about its content, author, journal, editor, and changes in the place that was under study.</style></abstract><issue><style face="normal" font="default" size="100%">4</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%">Li, Yue-Lin</style></author><author><style face="normal" font="default" size="100%">Tenhunen, J.</style></author><author><style face="normal" font="default" size="100%">Mirzaei, H.</style></author><author><style face="normal" font="default" size="100%">Hussain, M. Z.</style></author><author><style face="normal" font="default" size="100%">Siebicke, L.</style></author><author><style face="normal" font="default" size="100%">Foken, T.</style></author><author><style face="normal" font="default" size="100%">Otieno, D.</style></author><author><style face="normal" font="default" size="100%">Schmidt, M.</style></author><author><style face="normal" font="default" size="100%">Ribeiro, N.</style></author><author><style face="normal" font="default" size="100%">Aires, L.</style></author><author><style face="normal" font="default" size="100%">Pio, C.</style></author><author><style face="normal" font="default" size="100%">Banza, J.</style></author><author><style face="normal" font="default" size="100%">Pereira, J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Assessment and up-scaling of CO2 exchange by patches of the herbaceous vegetation mosaic in a Portuguese cork oak woodland</style></title><secondary-title><style face="normal" font="default" size="100%">Agricultural and Forest Meteorology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Herbaceous vegetation</style></keyword><keyword><style  face="normal" font="default" size="100%">Light response model</style></keyword><keyword><style  face="normal" font="default" size="100%">montado</style></keyword><keyword><style  face="normal" font="default" size="100%">net ecosystem exchange</style></keyword><keyword><style  face="normal" font="default" size="100%">Oak woodland</style></keyword><keyword><style  face="normal" font="default" size="100%">up-scaling</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2008</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2008///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S0168192308000981</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">148</style></volume><pages><style face="normal" font="default" size="100%">1318 - 1331</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Long-term eddy covariance measurements over a montado oak woodland in southern Portugal have documented a vulnerability to predicted decreases in springtime rainfall, since water availability during spring limits annual CO2 gain, the growth of fodder for animals, and the production of cork by Quercus suber. The current study examined CO2 exchange of three different herbaceous vegetation components distributed over montado landscapes and within the footprint of long-term landscape eddy covariance monitoring studies. Simultaneous measurements with eddy covariance at two sites and with manually operated chambers at multiple locations revealed that slow drainage of shallow basins, the onset of drying at higher sites and a high release of CO2 below tree canopies signiﬁcantly inﬂuenced the overall course of montado ecosystem gas exchange during the spring. Hyperbolic light response models were employed to up-scale and compare herbaceous gas exchange with landscape net ecosystem CO2 ﬂux. The up-scaling demonstrates the importance of the herbaceous understory in determining annual carbon balance of the montado and suggests a relatively small additional CO2 uptake by the tree canopies and boles, i.e., by the aboveground tree compartment, during springtime. Annual ﬂux totals obtained during the extremely dry year 2005 and a normal precipitation year 2006 for the oak woodland and a nearby grassland were essentially the same, indicating that both ecosystems similarly exploit available resources. Based on comparisons with additional temperate grasslands, we can visualize the montado herbaceous cover as a typical European grassland canopy, but where temperature ﬂuctuations in winter control uptake, and where total production depends on springtime rainfall as it controls phenological events and eventually dieback of the vegetation. On the other hand, tree canopies remain active longer during late spring and early summer, modifying the montado response from that of grassland. Uncertainties in ﬂux estimates via both chamber and eddy covariance methodologies currently prevent a full understanding of vegetation/atmosphere coupling, of the recycling of CO2 between the understory communities and trees, and of relationships between exchange rates of individual components of the vegetation mosaic and overall carbon and water balances in montado landscapes.</style></abstract><issue><style face="normal" font="default" size="100%">8-9</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%">Cubera, Elena</style></author><author><style face="normal" font="default" size="100%">Moreno, Gerardo</style></author><author><style face="normal" font="default" size="100%">Elena, C</style></author><author><style face="normal" font="default" size="100%">Gerardo, M</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of single Quercus ilex trees upon spatial and seasonal changes in soil water content in dehesas of central western Spain</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%">Oak woodland</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus ilex</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil water content</style></keyword><keyword><style  face="normal" font="default" size="100%">TDR</style></keyword><keyword><style  face="normal" font="default" size="100%">tree-grass interaction</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><volume><style face="normal" font="default" size="100%">64</style></volume><pages><style face="normal" font="default" size="100%">355-364</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The spatial and temporal evolution of soil water content () in Quercus ilex dehesas has been investigated to determine how trees modify the soil water dynamics and the nature of tree-grass interactions in terms of soil water use in these ecosystems. Soil physical parameters and were measured at different distances from the tree trunk (2-30 m) in the upper 300 cm of soil. was measured monthly by TDR during 2002-2005. Tree water potential was determined during the summers of 2004 and 2005. At deeper soil layers, mean values were higher beyond than beneath tree canopy during dry periods. depletion beyond tree canopy continued even in summer, when herbaceous plants dried up, suggesting that trees uptake water from the whole inter-tree space. Results have shown a high dependence of trees on deep water reserves throughout late spring and summer, which helps to avoid competition for water with herbaceous vegetation.</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%">Cubera, Elena</style></author><author><style face="normal" font="default" size="100%">Moreno, Gerardo</style></author><author><style face="normal" font="default" size="100%">Elena, C.</style></author><author><style face="normal" font="default" size="100%">Gerardo, M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of single Quercus ilex trees upon spatial and seasonal changes in soil water content in dehesas of central western Spain</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%">Oak woodland</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus ilex</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil water content</style></keyword><keyword><style  face="normal" font="default" size="100%">TDR</style></keyword><keyword><style  face="normal" font="default" size="100%">tree-grass interaction</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2007///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1051/forest:2007012</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">64</style></volume><pages><style face="normal" font="default" size="100%">355 - 364</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The spatial and temporal evolution of soil water content () in Quercus ilex dehesas has been investigated to determine how trees modify the soil water dynamics and the nature of tree-grass interactions in terms of soil water use in these ecosystems. Soil physical parameters and were measured at different distances from the tree trunk (2-30 m) in the upper 300 cm of soil. was measured monthly by TDR during 2002-2005. Tree water potential was determined during the summers of 2004 and 2005. At deeper soil layers, mean values were higher beyond than beneath tree canopy during dry periods. depletion beyond tree canopy continued even in summer, when herbaceous plants dried up, suggesting that trees uptake water from the whole inter-tree space. Results have shown a high dependence of trees on deep water reserves throughout late spring and summer, which helps to avoid competition for water with herbaceous vegetation.</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue></record></records></xml>