Journal
ECOLOGICAL INDICATORS
Volume 108, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ecolind.2019.105753
Keywords
Vegetation activity; Normalized difference vegetation index; Annual tree-ring; Forest growth; Climate; Spain
Categories
Funding
- Spanish Commission of Science and Technology [CGL2014-52135-C03-01, CGL2015-69186-C2-1-R, CGL2015-69985-R, CGL2013-48843C2-1-R, AGL2014-53822-C2-1-R, BFU2010-21451, PCIN-2015-220, CGL2016-81706-REDT, CGL2017-82216-R]
- FEDER [1560/2015]
- Red de Parques Nacionales
- European Commission
- AXIS
- INDECIS
- FORMAS (SE)
- DLR (DE)
- BMWFW (AT)
- IFD (DK)
- MINECO (ES)
- ANR (FR)
- European Union [690462]
- Aragon Regional Government
- Spanish Ministry of Economy
- Competitiveness and Miquel Tomas-Burguera
- Spanish Ministry of Education, Culture and Sport
- Xunta de Galicia [PGIDIT06PXIB502262PR, GRC GI-1809, ROCLIGAL10MDS291009PR]
- INIA [RTA2006-00117]
- Interreg V-A POCTEFA
- [IJCI-2015-25845]
- [MINECO-FPDI 2013-16600]
- [FJCI 2016-30121]
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This study links tree-ring growth and gross primary production for a variety of forest types under different environmental conditions across Spain. NOAA-AVHRR satellite imagery data were combined with dendrochronological records and climate data at a fine spatial resolution (1.21 km(2)) to analyze the interannual variability of tree-ring growth and vegetation activity for different forest biomes from 1981 to 2015. Specifically, we assessed the links between tree-ring width indices (TRWi), the Normalized Difference Vegetation Index (NDVI) and a variety of environmental conditions, represented by climatic variables (air temperature, precipitation, evapotranspiration and water balance) and elevation. The impact of these variables on tree growth was assessed by means of the Predictive Discriminant Analysis (PDA). Results reveal a general positive and significant relationship between inter-annual variability of the NDVI at a high spatial resolution (1.21 km(2)) and tree-ring growth. Maximum correlations between NDVI and tree-ring growth were recorded when cumulative NDVI values were considered, in some cases covering long time periods (6-10 months), suggesting that tree growth is mainly related to Gross Primary Production (GPP) at annual scale. The relationship between tree-ring growth and inter-annual variability of the NDVI, however, strongly varies between forest types and environmental conditions.
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