<?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%">Rambal, S</style></author><author><style face="normal" font="default" size="100%">Lempereur, M</style></author><author><style face="normal" font="default" size="100%">Limousin, J M</style></author><author><style face="normal" font="default" size="100%">Martin-StPaul, N K</style></author><author><style face="normal" font="default" size="100%">Ourcival, J M</style></author><author><style face="normal" font="default" size="100%">Rodríguez-Calcerrada, J</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">How drought severity constrains GPP and its partitioning among carbon pools in a Quercus ilex coppice?</style></title><secondary-title><style face="normal" font="default" size="100%">Biogeosciences Discuss.</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">carbon sink</style></keyword><keyword><style  face="normal" font="default" size="100%">Drought</style></keyword><keyword><style  face="normal" font="default" size="100%">GPP</style></keyword><keyword><style  face="normal" font="default" size="100%">photosynthates</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus ilex</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><publisher><style face="normal" font="default" size="100%">Copernicus Publications</style></publisher><volume><style face="normal" font="default" size="100%">11</style></volume><pages><style face="normal" font="default" size="100%">8673-8711</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The partitioning of photosynthates toward biomass compartments has a crucial role in the carbon sink function of forests. Few studies have examined how carbon is allocated toward plant compartments in drought prone forests. We analyzed the fate of GPP in relation to yearly water deficit in an old evergreen Mediterranean Quercus ilex coppice severely affected by water limitations. Gross and net carbon fluxes between the ecosystem and the atmosphere were measured with an eddy-covariance flux tower running continuously since 2001. Discrete measurements of litterfall, stem growth and fAPAR allowed us to derive annual productions of leaves, wood, flowers and acorns and an isometric relationship between stem and belowground biomass has been used to estimate perennial belowground growth. By combining eddy-covariance fluxes with annual productions we managed to close a C budget and derive values of autotrophic and heterotrophic respirations, NPP and carbon use efficiency (CUE, the ratio between NPP and GPP). Average values of yearly NEP, GPP and Reco were 282, 1259 and 977 g C m−2. The corresponding ANPP components were 142.5, 26.4 and 69.6 g C m−2 for leaves, reproductive effort (flowers and fruits) and stems. Gross and net carbon exchange between the ecosystem and the atmosphere were affected by annual water deficit. Partitioning to the different plant compartments was also impacted by drought, with a hierarchy of responses going from the most affected, the stem growth, to the least affected, the leaf production. The average CUE was 0.40, which is well in the range for Mediterranean-type forest ecosystems. CUE tended to decrease more slightly in response to drought than GPP and NPP, probably due to drought-acclimation of autotrophic respiration. Overall, our results provide a baseline for modeling the inter-annual variations of carbon fluxes and allocation in this widespread Mediterranean ecosystem and highlight the value of maintaining continuous experimental measurements over the long term.</style></abstract><notes><style face="normal" font="default" size="100%">APS</style></notes><research-notes><style face="normal" font="default" size="100%">APS</style></research-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%">Maselli, Fabio</style></author><author><style face="normal" font="default" size="100%">Cherubini, Paolo</style></author><author><style face="normal" font="default" size="100%">Chiesi, Marta</style></author><author><style face="normal" font="default" size="100%">Gilabert, María Amparo</style></author><author><style face="normal" font="default" size="100%">Lombardi, Fabio</style></author><author><style face="normal" font="default" size="100%">Moreno, Alvaro</style></author><author><style face="normal" font="default" size="100%">Teobaldelli, Maurizio</style></author><author><style face="normal" font="default" size="100%">Tognetti, Roberto</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Start of the dry season as a main determinant of inter-annual Mediterranean forest production variations</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%">Dry season</style></keyword><keyword><style  face="normal" font="default" size="100%">GPP</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean forests</style></keyword><keyword><style  face="normal" font="default" size="100%">Modified C-Fix</style></keyword><keyword><style  face="normal" font="default" size="100%">NDVI</style></keyword><keyword><style  face="normal" font="default" size="100%">Ring-widths</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2014///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/pii/S0168192314001063</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">194</style></volume><pages><style face="normal" font="default" size="100%">197 - 206</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Recent investigations have highlighted the dependence of Mediterranean forest production on spring rainfall. The current work introduces the concept of the start of the dry season (SDS) and performs a three-step analysis to determine the effect of SDS on Mediterranean forest production. Seven forest zones of Tuscany (Central Italy), which present differently pronounced Mediterranean features, are considered. First, a statistical analysis investigates the influence of spring water budget on forest Normalized Difference Vegetation Index (NDVI) inter-annual variations during July–August. The analysis is then extended to assess the impact of inter-annual SDS variability on forest gross primary production (GPP) simulated by a NDVI driven parametric model, modified C-Fix. These simulations lead to rank the considered forest types according to the relevance of SDS in regulating inter-annual GPP variations. The application of similar statistical analyses to detrended tree ring-width time series of typical Tuscany forests confirms the existence of an eco-climatic gradient in the functional relevance of SDS. The influence of SDS on tree growth is attenuated moving from Mediterranean arid to temperate humid environments. These findings are examined and interpreted from an eco-physiological viewpoint taking into consideration the peculiarity of Mediterranean forest ecosystems. Next, relevant implications are discussed in view of the possible consequences of ongoing climate change.</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%">Fares, S.</style></author><author><style face="normal" font="default" size="100%">Matteucci, G.</style></author><author><style face="normal" font="default" size="100%">Scarascia Mugnozza, G.</style></author><author><style face="normal" font="default" size="100%">Morani, a.</style></author><author><style face="normal" font="default" size="100%">Calfapietra, C.</style></author><author><style face="normal" font="default" size="100%">Salvatori, E.</style></author><author><style face="normal" font="default" size="100%">Fusaro, L.</style></author><author><style face="normal" font="default" size="100%">Manes, F.</style></author><author><style face="normal" font="default" size="100%">Loreto, F.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Testing of models of stomatal ozone fluxes with field measurements in a mixed Mediterranean forest</style></title><secondary-title><style face="normal" font="default" size="100%">Atmospheric Environment</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">GPP</style></keyword><keyword><style  face="normal" font="default" size="100%">mediterranean forest</style></keyword><keyword><style  face="normal" font="default" size="100%">Ozone ﬂuxes</style></keyword><keyword><style  face="normal" font="default" size="100%">Stomatal conductance models</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><publisher><style face="normal" font="default" size="100%">Elsevier Ltd</style></publisher><volume><style face="normal" font="default" size="100%">67</style></volume><pages><style face="normal" font="default" size="100%">242-251</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Mediterranean forests close to urban areas are exposed to polluted plumes loaded with tropospheric ozone. This is the case of Castelporziano Estate, a 6000 ha Mediterranean forest 25 km from Rome downtown on the coast of the Mediterranean Sea. In September 2011 we started an intensive ﬁeld campaign aimed at investigating ozone deposition from a mixed Mediterranean forest, mainly composed by Quercus suber, Quercus ilex, Pinus pinea. Measurements at canopy level with the eddy covariance technique were supported by a vegetation survey and the measurement of all environmental parameters which allowed to calculate stomatal ozone ﬂuxes. Leaf-level measurements were used to parameterize models to calculate stomatal conductance based on a Jarvis-type and BalleBerry approach. We show changes in magnitude of ozone ﬂuxes from a warm (September) to a cold period (OctobereDecember). Stomatal component explained almost the totality of ozone ﬂuxes during the cold days, but contributed only up to 50% to total ozone deposition during warm days, suggesting that other sinks (e.g. chemistry in the gas-phase) play a major role. Modeled stomatal ozone ﬂuxes based on a Jarvis-type approach (DO3SE) correlated with measured ﬂuxes better than using a BalleBerry approach. A third model based on a modiﬁed BalleBerry equation was proposed to account for the non-linear dependency of stomatal conductance on relative humidity. This research will help the development of metrics for ozone-risk assessment and advance our understanding of mixed Mediterranean forests in biosphereeatmosphere exchange.</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%">Chiesi, M.</style></author><author><style face="normal" font="default" size="100%">Fibbi, L.</style></author><author><style face="normal" font="default" size="100%">Genesio, L.</style></author><author><style face="normal" font="default" size="100%">Gioli, B.</style></author><author><style face="normal" font="default" size="100%">Magno, R.</style></author><author><style face="normal" font="default" size="100%">Maselli, F.</style></author><author><style face="normal" font="default" size="100%">Moriondo, M.</style></author><author><style face="normal" font="default" size="100%">Vaccari, F. P.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Integration of ground and satellite data to model Mediterranean forest processes</style></title><secondary-title><style face="normal" font="default" size="100%">INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">BIOME-BGC</style></keyword><keyword><style  face="normal" font="default" size="100%">C-Fix</style></keyword><keyword><style  face="normal" font="default" size="100%">ET</style></keyword><keyword><style  face="normal" font="default" size="100%">GPP</style></keyword><keyword><style  face="normal" font="default" size="100%">mediterranean forest</style></keyword><keyword><style  face="normal" font="default" size="100%">NEE</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%">13</style></volume><pages><style face="normal" font="default" size="100%">504 - 515</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The current work presents the testing of a modeling strategy that has been recently developed to simulate the gross and net carbon fluxes of Mediterranean forest ecosystems. The strategy is based on the use of a NDVI-driven parametric model, C-Fix, and of a biogeochemical model, BIOME-BGC, whose outputs are combined to simulate the behavior of forest ecosystems at different development stages. The performances of the modeling strategy are evaluated in three Italian study sites (San Rossore, Lecceto and Pianosa), where carbon fluxes are being measured through the eddy correlation technique. These sites are characterized by variable Mediterranean climates and are covered by different types of forest vegetation (pine wood, Holm oak forest and Macchia, respectively). The results of the tests indicate that the modeling strategy is generally capable of reproducing monthly GPP and NEE patterns in all three study sites. The highest accuracy is obtained in the most mature, homogenous pine wood of San Rossore, while the worst results are found in the Lecceto forest, where there are the most heterogeneous terrain, soil and vegetation conditions. The main error sources are identified in the inaccurate definition of the model inputs, particularly those regulating the site water budgets, which exert a strong control on forest productivity during the Mediterranean summer dry season. In general, the incorporation of NDVI-derived fAPAR estimates corrects for most of these errors and renders the forest flux simulations more stable and accurate. (C) 2010 Elsevier B.V. All rights reserved.</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;pub-location: PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS&lt;br/&gt;publisher: ELSEVIER SCIENCE BV</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%">Chiesi, M.</style></author><author><style face="normal" font="default" size="100%">Maselli, F.</style></author><author><style face="normal" font="default" size="100%">Moriondo, M.</style></author><author><style face="normal" font="default" size="100%">Fibbi, L.</style></author><author><style face="normal" font="default" size="100%">Bindi, M.</style></author><author><style face="normal" font="default" size="100%">Running, S. W.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Application of BIOME-BGC to simulate Mediterranean forest processes</style></title><secondary-title><style face="normal" font="default" size="100%">Ecological Modelling</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">BIOME-BGC</style></keyword><keyword><style  face="normal" font="default" size="100%">C-Fix</style></keyword><keyword><style  face="normal" font="default" size="100%">GPP</style></keyword><keyword><style  face="normal" font="default" size="100%">mediterranean forest</style></keyword><keyword><style  face="normal" font="default" size="100%">monitoring</style></keyword><keyword><style  face="normal" font="default" size="100%">Spot-VGT</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://linkinghub.elsevier.com/retrieve/pii/S0304380007001780</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">206</style></volume><pages><style face="normal" font="default" size="100%">179 - 190</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The current work investigates on the applicability of a widespread bio-geochemical model (BIOME-BGC) to estimate seasonal photosynthesis and transpiration within water limited Mediterranean forest environments. The use of the model required a preliminary calibration phase, aimed at setting its ecophysiological parameters to properly simulate the behavior of three Mediterranean species (Quercus ilex L., Quercus cerris L. and Pinus pinaster Ait.). For each of these species, the calibration of BIOME-BGC was performed by adjusting the monthly gross primary productivity (GPP) estimates of 10 forest plots to those of a simpliﬁed parametric model, C-Fix, which is based on the use of satellite and ancillary data. In particular, BIOME-BGC was run modifying the eco-physiological parameters controlling stomatal conductance, in order to identify the best model conﬁgurations to reproduce the spatial, intraand inter-annual GPP variations simulated by C-Fix. Next, the fraction of leaf nitrogen in Rubisco was adjusted to ﬁt also the magnitudes of the C-Fix GPP estimates. The subsequent testing phase consisted of applying the original and calibrated versions of BIOME-BGC in independent forest sites where the three species considered were dominant and for which ﬁeld measurements of photosynthesis and transpiration were available. In all cases the use of the calibrated BIOME-BGC versions led to notably improve the GPP and transpiration estimation accuracy of the original model. The results obtained encourage the operational application of BIOME-BGC in Mediterranean forest environments and indicate a possible strategy to integrate its functions with those of C-Fix.</style></abstract><issue><style face="normal" font="default" size="100%">1-2</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%">Chiesi, M</style></author><author><style face="normal" font="default" size="100%">Maselli, F</style></author><author><style face="normal" font="default" size="100%">Moriondo, M</style></author><author><style face="normal" font="default" size="100%">Fibbi, L</style></author><author><style face="normal" font="default" size="100%">Bindi, M</style></author><author><style face="normal" font="default" size="100%">Running, S W</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Application of BIOME-BGC to simulate Mediterranean forest processes</style></title><secondary-title><style face="normal" font="default" size="100%">Ecological Modelling</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">BIOME-BGC</style></keyword><keyword><style  face="normal" font="default" size="100%">C-Fix</style></keyword><keyword><style  face="normal" font="default" size="100%">GPP</style></keyword><keyword><style  face="normal" font="default" size="100%">mediterranean forest</style></keyword><keyword><style  face="normal" font="default" size="100%">monitoring</style></keyword><keyword><style  face="normal" font="default" size="100%">Spot-VGT</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><volume><style face="normal" font="default" size="100%">206</style></volume><pages><style face="normal" font="default" size="100%">179-190</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The current work investigates on the applicability of a widespread bio-geochemical model (BIOME-BGC) to estimate seasonal photosynthesis and transpiration within water limited Mediterranean forest environments. The use of the model required a preliminary calibration phase, aimed at setting its ecophysiological parameters to properly simulate the behavior of three Mediterranean species (Quercus ilex L., Quercus cerris L. and Pinus pinaster Ait.). For each of these species, the calibration of BIOME-BGC was performed by adjusting the monthly gross primary productivity (GPP) estimates of 10 forest plots to those of a simpliﬁed parametric model, C-Fix, which is based on the use of satellite and ancillary data. In particular, BIOME-BGC was run modifying the eco-physiological parameters controlling stomatal conductance, in order to identify the best model conﬁgurations to reproduce the spatial, intraand inter-annual GPP variations simulated by C-Fix. Next, the fraction of leaf nitrogen in Rubisco was adjusted to ﬁt also the magnitudes of the C-Fix GPP estimates. The subsequent testing phase consisted of applying the original and calibrated versions of BIOME-BGC in independent forest sites where the three species considered were dominant and for which ﬁeld measurements of photosynthesis and transpiration were available. In all cases the use of the calibrated BIOME-BGC versions led to notably improve the GPP and transpiration estimation accuracy of the original model. The results obtained encourage the operational application of BIOME-BGC in Mediterranean forest environments and indicate a possible strategy to integrate its functions with those of C-Fix.</style></abstract></record></records></xml>