Forest resilience to drought varies across biomes

Bibliographische Detailangaben
Veröffentlicht in:	Global change biology. - 1999. - 24(2018), 5 vom: 28. Mai, Seite 2143-2158
1. Verfasser:	Gazol, Antonio (VerfasserIn)
Weitere Verfasser:	Camarero, Jesus Julio, Vicente-Serrano, Sergio M, Sánchez-Salguero, Raúl, Gutiérrez, Emilia, de Luis, Martin, Sangüesa-Barreda, Gabriel, Novak, Klemen, Rozas, Vicente, Tíscar, Pedro A, Linares, Juan C, Martín-Hernández, Natalia, Martínez Del Castillo, Edurne, Ribas, Montse, García-González, Ignacio, Silla, Fernando, Camisón, Alvaro, Génova, Mar, Olano, José M, Longares, Luis A, Hevia, Andrea, Tomás-Burguera, Miquel, Galván, J Diego
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2018
Zugriff auf das übergeordnete Werk:	Global change biology
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't dendroecology drought stress forest growth forest productivity normalized difference vegetation index resilience index tree-rings

Beschreibung
Zusammenfassung:	© 2018 John Wiley & Sons Ltd. Forecasted increase drought frequency and severity may drive worldwide declines in forest productivity. Species-level responses to a drier world are likely to be influenced by their functional traits. Here, we analyse forest resilience to drought using an extensive network of tree-ring width data and satellite imagery. We compiled proxies of forest growth and productivity (TRWi, absolutely dated ring-width indices; NDVI, Normalized Difference Vegetation Index) for 11 tree species and 502 forests in Spain corresponding to Mediterranean, temperate, and continental biomes. Four different components of forest resilience to drought were calculated based on TRWi and NDVI data before, during, and after four major droughts (1986, 1994-1995, 1999, and 2005), and pointed out that TRWi data were more sensitive metrics of forest resilience to drought than NDVI data. Resilience was related to both drought severity and forest composition. Evergreen gymnosperms dominating semi-arid Mediterranean forests showed the lowest resistance to drought, but higher recovery than deciduous angiosperms dominating humid temperate forests. Moreover, semi-arid gymnosperm forests presented a negative temporal trend in the resistance to drought, but this pattern was absent in continental and temperate forests. Although gymnosperms in dry Mediterranean forests showed a faster recovery after drought, their recovery potential could be constrained if droughts become more frequent. Conversely, angiosperms and gymnosperms inhabiting temperate and continental sites might have problems to recover after more intense droughts since they resist drought but are less able to recover afterwards
Beschreibung:	Date Completed 11.12.2018 Date Revised 11.12.2018 published: Print-Electronic Citation Status MEDLINE
ISSN:	1365-2486
DOI:	10.1111/gcb.14082