{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T06:03:22Z","timestamp":1770703402938,"version":"3.49.0"},"reference-count":52,"publisher":"Canadian Science Publishing","issue":"12","license":[{"start":{"date-parts":[[2009,12,1]],"date-time":"2009-12-01T00:00:00Z","timestamp":1259625600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.nrcresearchpress.com\/page\/about\/CorporateTextAndDataMining"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Can. J. For. Res."],"published-print":{"date-parts":[[2009,12]]},"abstract":"<jats:p>Holm oak ( Quercus ilex L.) is a long-lived species widely distributed across the Mediterranean Basin, with potential value for dendrochronology and dendroclimatology. However, tree-ring dating in Q.\u00a0ilex is a complex task that has limited the number of dendrochronological studies using this evergreen species. In the present work, it was investigated if old Q.\u00a0ilex trees showed annual tree rings and whether they can be used as climate proxies. A long tree-ring chronology (126\u00a0years) of Q.\u00a0ilex was developed using cross sections of 20 trees from the Guadiana river basin (Portugal). The high correlation among tree-ring series suggested that tree growth was controlled mainly by climate. Response function analysis showed a positive correlation between tree-ring width and precipitation from October<jats:sub>(t\u20131)<\/jats:sub>of the previous year to January<jats:sub>(t)<\/jats:sub>of the current year and in May<jats:sub>(t)<\/jats:sub>. Tree-ring width was negatively correlated with the North Atlantic oscillation that exerts a strong influence on the precipitation over Iberia. Negative pointer years were triggered by dry years and became more frequent during the last decade of the 20th century. In conclusion, it is possible to accurately date old Q.\u00a0ilex trees, and their tree rings could be used for climate reconstructions across the Mediterranean.<\/jats:p>","DOI":"10.1139\/x09-163","type":"journal-article","created":{"date-parts":[[2009,12,23]],"date-time":"2009-12-23T15:19:06Z","timestamp":1261581546000},"page":"2486-2493","source":"Crossref","is-referenced-by-count":43,"title":["Dendrochronology of Quercus ilex L. and its potential use for climate reconstruction in the Mediterranean region"],"prefix":"10.1139","volume":"39","author":[{"given":"F.","family":"Campelo","sequence":"first","affiliation":[{"name":"Centro de Ecologia Funcional, Departamento de Ci\u00eancias da Vida, Universidade de Coimbra, Cal\u00e7ada Martim de Freitas, 3001-455 Coimbra, Portugal."},{"name":"Departament d\u2019Ecologia, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain."},{"name":"Departamento de Bot\u00e1nica, Universidade de Santiago de Compostela, Escola Polit\u00e9cnica Superior, Campus de Lugo, Lugo, Spain."},{"name":"Swiss Federal Institute WSL, Z\u00fcrcherstrasse 111, 8903 Birmensdorf, Switzerland."}]},{"given":"C.","family":"Nabais","sequence":"additional","affiliation":[{"name":"Centro de Ecologia Funcional, Departamento de Ci\u00eancias da Vida, Universidade de Coimbra, Cal\u00e7ada Martim de Freitas, 3001-455 Coimbra, Portugal."},{"name":"Departament d\u2019Ecologia, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain."},{"name":"Departamento de Bot\u00e1nica, Universidade de Santiago de Compostela, Escola Polit\u00e9cnica Superior, Campus de Lugo, Lugo, Spain."},{"name":"Swiss Federal Institute WSL, Z\u00fcrcherstrasse 111, 8903 Birmensdorf, Switzerland."}]},{"given":"I.","family":"Garc\u00eda-Gonz\u00e1lez","sequence":"additional","affiliation":[{"name":"Centro de Ecologia Funcional, Departamento de Ci\u00eancias da Vida, Universidade de Coimbra, Cal\u00e7ada Martim de Freitas, 3001-455 Coimbra, Portugal."},{"name":"Departament d\u2019Ecologia, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain."},{"name":"Departamento de Bot\u00e1nica, Universidade de Santiago de Compostela, Escola Polit\u00e9cnica Superior, Campus de Lugo, Lugo, Spain."},{"name":"Swiss Federal Institute WSL, Z\u00fcrcherstrasse 111, 8903 Birmensdorf, Switzerland."}]},{"given":"P.","family":"Cherubini","sequence":"additional","affiliation":[{"name":"Centro de Ecologia Funcional, Departamento de Ci\u00eancias da Vida, Universidade de Coimbra, Cal\u00e7ada Martim de Freitas, 3001-455 Coimbra, Portugal."},{"name":"Departament d\u2019Ecologia, Facultat de Biologia, Universitat de Barcelona, Av. 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