RT Journal Article T1 Climate and Soil Microsite Conditions Determine Local Adaptation in Declining Silver Fir Forests A1 García García, Isabel A1 Méndez Cea, Belén A1 González de Andrés, Ester A1 Gazol, Antonio A1 Sánchez Salguero, Raúl A1 Manso Martínez, David A1 Hórreo Escandón, José Luis A1 Camarero, J. Julio A1 Linares, Juan Carlos A1 Gallego Rodríguez, Francisco Javier AB Ongoing climatic change is threatening the survival of drought-sensitive tree species, such as silver fir (Abies alba). Drought-induced dieback had been previously explored in this conifer, although the role played by tree-level genetic diversity and its relationship with growth patterns and soil microsite conditions remained elusive. We used double digest restriction-site-associated DNA sequencing (ddRADseq) to describe different genetic characteristics of five silver fir forests in the Spanish Pyrenees, including declining and non-declining trees. Single nucleotide polymorphisms (SNPs) were used to investigate the relationships between genetics, dieback, intraspecific trait variation (functional dendrophenotypic traits and leaf traits), local bioclimatic conditions, and rhizosphere soil properties. While there were no noticeable genetic differences between declining and non-declining trees, genome–environment associations with selection signatures were abundant, suggesting a strong influence of climate, soil physicochemical properties, and soil microbial diversity on local adaptation. These results provide novel insights into how genetics and diverse environmental factors are interrelated and highlight the need to incorporate genetic data into silver fir forest dieback studies to gain a better understanding of local adaptation. PB MDPI SN 2223-7747 YR 2023 FD 2023-07-10 LK https://hdl.handle.net/20.500.14352/121762 UL https://hdl.handle.net/20.500.14352/121762 LA eng NO García-García, I., Méndez-Cea, B., González de Andrés, E., Gazol, A., Sánchez-Salguero, R., Manso-Martínez, D., Horreo, J. L., Camarero, J. J., Linares, J. C., & Gallego, F. J. (2023). Climate and Soil Microsite Conditions Determine Local Adaptation in Declining Silver Fir Forests. Plants, 12(14). https://doi.org/10.3390/PLANTS12142607 NO This research was funded by Junta de Andalucía, grant number PAIDI, P18-RT-1170, and by the Spanish Ministry of Science and Innovation (MICINN), grant numbers TED2021-129770B-C22 and PID2021-123675OB-C44. A.G. is supported by the “Ramón y Cajal” Program of the Spanish MICINN under grant RyC2020-030647-I, and by the Spanish National Research Council (CSIC) under grant PIE-20223AT003. Consejo Superior de Investigaciones Científicas (España). NO Junta de Andalucía NO Ministerio de Ciencia e Innovación (España) NO Consejo Superior de Investigaciones Científicas (España) NO European Commission NO Universidad Complutense de Madrid DS Docta Complutense RD 28 jun 2025