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Título: | Droughts and climate warming desynchronize Black pine growth across the Mediterranean Basin. |
Autor: | Sangüesa-Barreda, G. CSIC ORCID ; Camarero, Jesús Julio CSIC ORCID ; Sánchez-Salguero, Raúl CSIC ORCID; Gutiérrez, Emilia; Linares, Juan Carlos; Génova, Mar; Ribas, Montserrat; Tíscar, Pedro A.; López Sáez, José Antonio CSIC ORCID | Palabras clave: | Biogeography Dendroecology Pinus nigra Tree rings Species distribution |
Fecha de publicación: | 2019 | Editor: | Elsevier | Citación: | Science of the Total Environment 697: 133989 (2019) | Resumen: | The effects of climate change on forest growth are not homogeneous across tree species distribution ranges because of inter-population variability and spatial heterogeneity. Although latitudinal and thermal gradients in growth patterns have been widely investigated, changes in these patterns along longitudinal gradients due to the different timing and severity of regional droughts are less studied. Here, we investigated these responses in Mediterranean Black pine (Pinus nigra Arn.). We built a tree-ring width dataset comprising 77 forests (1202 trees) across the Mediterranean Basin. The biogeographical patterns in growth patterns and the relationships between growth and mean temperature, precipitation, drought and atmospheric circulations patterns (NAO -North Atlantic Oscillation-, SOI -Southern Oscillation Index- and MOI -Mediterranean Oscillation index-) were analyzed. Then, we evaluated the spatial and temporal growth synchrony between and within east and west populations. We found different growth and climate patterns in west vs. east Black pine populations, although in both regions growth was driven by similar temperature and precipitation variables. MOI significantly influenced tree growth, whilst NAO and SOI showed weaker effects. Growth of east and west Black pine populations desynchronized after the 1970s when several and uncoupled regional droughts occurred across the Mediterranean Basin. We detected a climate shift from the 1970s to the 1980s affecting growth patterns, changing growth-climate relationships, and reducing forest growth from west to east Black pine forests. Afterwards, climate and growth of east and west populations became increasingly more divergent. Our findings imply that integral bioclimatic and biogeographical analyses across the species distribution area must be considered to adequately assess the impact of climate change on tree growth under warming and more arid conditions. | Versión del editor: | https://doi.org/10.1016/j.scitotenv.2019.133989 | URI: | http://hdl.handle.net/10261/213025 | DOI: | 10.1016/j.scitotenv.2019.133989 | ISSN: | 1879-1026 |
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