Articles

Articles 267 registres trobats  inicianterior252 - 261següent  anar al registre: La cerca s'ha fet en 0.00 segons. 
252.
8 p, 173.7 KB Remote estimation of carbon dioxide uptake by a Mediterranean forest / Garbulsky, Martín Fabio (Centre de Recerca Ecològica i Aplicacions Forestals) ; Filella Cubells, Iolanda (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals. Unitat d'Ecofisiologia i Canvi Global) ; Papale, Dario (Universidad de Buenos Aires. Faculty of Agronomy)
The estimation of the carbon balance in ecosystems, regions, and the biosphere is currently one of the main concerns in the study of the ecology of global change. Current remote sensing methodologies for estimating gross primary productivity are not satisfactory because they rely too heavily on (i) the availability of climatic data, (ii) the definition of land-use cover, and (iii) the assumptions of the effects of these two factors on the radiation-use efficiency of vegetation (RUE). [...]
2008
Global Change Biology, Vol. 14, Núm. 12 (Desembre 2008) , p. 2860–2867  
253.
13 p, 522.7 KB Twentieth century changes of tree-ring δ13C at the southern range-edge of Fagus sylvatica: increasing water-use efficiency does not avoid the growth decline induced by warming at low altitudes / Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Hunt, Jenny M. (Centre de Recerca Ecològica i Aplicacions Forestals. Unitat d'Ecofisiologia i Canvi Global) ; Ogaya Inurrigarro, Romà (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Jump, Alistair S. (Centre de Recerca Ecològica i Aplicacions Forestals. Unitat d'Ecofisiologia i Canvi Global)
We aimed to gain knowledge on the changes in intrinsic water use efficiency (iWUE) in response to increasing atmospheric CO2 concentrations and climate change over the last century. We investigated the variation in the iWUE of mature Fagus sylvatica trees located in the higher, central and lower altitudinal forest limits (HFL, CFA and LFL) of one of the southernmost sites of beech distribution in Europe, the Montseny Mountains in Catalonia (northeast Spain), during the last century by analysing the δ13C of their tree rings. [...]
2008
Global Change Biology, Vol. 14, Núm. 5 (Maig 2008) , p. 1076-1088  
254.
7 p, 227.6 KB Simulated climate change provokes rapid genetic change in the Mediterranean shrub Fumana thymifolia / Jump, Alistair (Centre de Recerca Ecològica i Aplicacions Forestals) ; Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Rico, Laura (Centre de Recerca Ecològica i Aplicacions Forestals. Unitat d'Ecofisiologia i Canvi Global) ; Ramallo, Elisenda (Centre de Recerca Ecològica i Aplicacions Forestals. Unitat d'Ecofisiologia i Canvi Global) ; Estiarte, Marc (Centre de Recerca Ecològica i Aplicacions Forestals. Unitat d'Ecofisiologia i Canvi Global) ; Martinez-Izquierdo, José A. (Consorci Laboratori CSIC-IRTA de Genetica Molecular Vegetal) ; Lloret Maya, Francisco (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Rapid climate change will impose strong directional selection pressures on natural plant populations. Climate-linked genetic variation in natural populations indicates that an evolutionary response is possible. [...]
2007
Global Change Biology, Vol. 14, Núm. 3 (March 2007) , p. 637-643  
255.
13 p, 372.3 KB Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland / Sardans i Galobart, Jordi (Centre de Recerca Ecològica i Aplicacions Forestals) ; Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Estiarte, Marc (Centre de Recerca Ecologica i Aplicacions Forestals. Ecophysiology and Global Change Unit) ; Prieto, Patricia (Centre de Recerca Ecologica i Aplicacions Forestals. Ecophysiology and Global Change Unit)
We investigated the effects of warming and drought on C and N concentrations, nitrogen use efficiency (NUE), and C and N accumulation in different ecosystem compartments. We conducted a 6-year (1999–2005) field experiment to simulate the climate conditions projected by IPCC models for the coming decades in a Mediterranean shrubland. [...]
2008
Global Change Biology, Vol. 14, Núm. 10 (Octubre 2008) , p. 2304-2316  
256.
19 p, 437.9 KB Response of plant species richness and primary productivity in shrublands along a north–south gradient in Europe to seven years of experimental warming and drought: reductions in primary productivity in the heat and drought year of 2003 / Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Prieto, Patricia (Centre de Recerca Ecològica i Aplicacions Forestals) ; Beier, Claus (RISØ National Laboratory) ; Cessaraccio, Carla (National Research Council of Italy. Institute of Biometeorology) ; De Angelis, Paolo (University of Tuscia. Department of Forest Environment and Resources) ; De Dato, Giovanbattista (University of Tuscia. Department of Forest Environment and Resources) ; Emmett, Bridget A. (Centre for Ecology and Hydrology-Bangor) ; Estiarte, Marc (Centre de Recerca Ecològica i Apicacions Forestals) ; Garadnai, János (Hungarian Academy of Sciences. Institute of Ecology and Botany) ; Gorissen, Antonie (Plant Research International) ; Lang, Edit Kovacs (Hungarian Academy of Sciences. Institute of Ecology and Botany) ; Kröel-Dulay, György (Hungarian Academy of Sciences. Institute of Ecology and Botany) ; Llorens, Laura (Centre de Recerca Ecològica i Apicacions Forestals) ; Pellizaro, Grazia (National Research Council of Italy. Institute of Biometeorology) ; Riis-Nielsen, Torben (University of Copenhagen. University of Copenhagen) ; Schmidt, Inger K. (University of Copenhagen. University of Copenhagen) ; Sirca, Constantino (Univeristy of Sassari. Department of Economics and Tree Crops) ; Sowerby, Alwyn (Centre for Ecology and Hydrology-Bangor) ; Spano, Donatella (Univeristy of Sassari. Department of Economics and Tree Crops) ; Tietema, Albert (Universiteit van Amsterdam. Center for Geo-ecological Research)
We used a nonintrusive field experiment carried out at six sites – Wales (UK), Denmark (DK), the Netherlands (NL), Hungary (HU), Sardinia (Italy – IT), and Catalonia (Spain – SP) – along a climatic and latitudinal gradient to examine the response of plant species richness and primary productivity to warming and drought in shrubland ecosystems. [...]
2007
Global Change Biology, Vol. 13, Núm. 12 (Desembre 2007) , p. 2563-2581  
257.
13 p, 316.7 KB Monoterpene emissions from rubber trees (Hevea brasiliensis) in a changing landscape and climate: chemical speciation and environmental control / Wang, Yong-Feng (Chinese Academy of Sciences. Xishuangbanna Tropical Botanical Garden) ; Owen, Susan M. (Centre de Recerca Ecològica i Aplicacions Forestals. Unitat d'Ecofisiologia i Canvi Global) ; Li, Qing-Jun (Chinese Academy of Sciences. Xishuangbanna Tropical Botanical Garden) ; Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Emissions of biogenic volatile organic compounds (VOCs) have important roles in ecophysiology and atmospheric chemistry at a wide range of spatial and temporal scales. Tropical regions are a major global source of VOC emissions and magnitude and chemical speciation of VOC emissions are highly plant-species specific. [...]
2007
Global Change Biology, Vol. 13, Núm. 11 (Novembre 2007) , p. 2270-2282  
258.
12 p, 371.7 KB Rapid climate change-related growth decline at the southern range edge of Fagus sylvatica / Jump, Alistair (Centre de Recerca Ecològica i Aplicacions Forestals) ; Hunt, Jenny M. (Centre de Recerca Ecològica i Aplicacions Forestals. Unitat d'Ecofisiologia) ; Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Studies on Fagus sylvatica show that growth in populations toward the southern limit of this species' distribution is limited strongly by drought. Warming temperatures in the Mediterranean region are expected to exacerbate drought where they are not accompanied by increases in precipitation. [...]
2006
Global Change Biology, Vol. 12, Núm. 11 ( 2006) , p. 2163-2174  
259.
11 p, 214.6 KB Experimental evidence of reduced diversity of seedlings due to climate modification in a Mediterranean-type community / Lloret Maya, Francisco (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Estiarte, Marc (Centre de Recerca Ecològica i Aplicacions Forestals. Unitat Ecofisiologia)
We are still lacking in experimental evidence of the effects of climate change on the richness of plant species under field conditions. We report a decrease in the species richness of recruited seedlings in a Mediterranean shrubland in experimentally induced drought and warming over 4 consecutive years. [...]
2004
Global Change Biology, Vol. 10, Núm. 2 (2004) , p. 248-258  
260.
10 p, 956.2 KB A global change-induced biome shift in the Montseny mountains (NE Spain) / Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Boada, Martí 1949- (Universitat Autònoma de Barcelona. Departament de Geografia)
Shifts in plant species and biome distribution in response to warming have been described in past climate changes. However, reported evidence of such shifts under current climate change is still scarce. [...]
2003
Global Change Biology, Vol. 9, Núm. 2 (2003) , p. 131-140  
261.
14 p, 536.4 KB Changed plant and animal life cycles from 1952 to 2000 in the Mediterranean region / Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Filella Cubells, Iolanda, dir. (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Comas, Pere (Cardedeu Field Station)
The available data on climate over the past century indicate that the earth is warming. Important biological effects, including changes of plant and animal life cycle events, have already been reported. [...]
2002
Global Change Biology, Vol. 8, Núm. 6 (2002) , p. 531-544  

Articles : 267 registres trobats   inicianterior252 - 261següent  anar al registre:
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