V. 81 N. 2s (2026): Atti della Conferenza Foreste vetuste e antichi alberi: un tesoro di natura, vita e cultura. Firenze 1 ottobre 2025 / Vallombrosa 2-3 ottobre 2025
Reviews

The oldest trees of the Mediterranean

Jan Esper
Department of Geography, Johannes Gutenberg University, Johann-Joachim-Becher-Weg 21 - 55099 Mainz, Germany.
Gianluca Piovesan
Department of Ecological and Biological Sciences, University of Tuscia, largo dell’Università snc - 01100 Viterbo, Italy.
Marco Carrer
Department of Land Environment Agriculture and Forestry, University of Padova, viale dell’Università 16 - 35020 Legnaro (PD), Italy.
Max C.A. Torbenson
Department of Geography, Texas A&M University, 377 Houston Street, College Station - TX 77843-3357, USA.
Ulf Büntgen
Global Change Research Institute of the Czech Academy of Sciences, Bělidla 986/4a - 60300 Brno, Czech Republic.

Pubblicato 2026-10-06

Parole chiave

  • old growth forests,
  • ancient tree,
  • tree rings,
  • dendrochronology,
  • Mediterranean basin,
  • climate change
  • ...Più
    Meno

Come citare

Esper, J., Piovesan, G., Carrer, M., Torbenson, M. C., & Büntgen, U. (2026). The oldest trees of the Mediterranean. L’Italia Forestale E Montana, 81(2s), 97–104. https://doi.org/10.36253/ifm-1249

Abstract

The Mediterranean region hosts some of the oldest trees in Europe growing in high-elevation environments and reaching ages well beyond 800 years. We here present eight of these sites from the Atlas Mountains in the west to the Taurus Mountains in the east and discuss their potential for high-resolution climate reconstruction using dendrochronological techniques. Evidence from ancient trees plays a key role in placing the current temperature and precipitation dynamics into a long-term context and thereby providing a foundation of naturally forced climate variability that is needed to validate model-based 21st century projections. This is demonstrated in a case study using maximum latewood density measurements from Pinus heldreichii in northern Greece to reconstruct July-September temperatures back to 730 CE. While permission for sampling increment cores from ancient trees must be granted for scientists, we argue that these sites must be sheltered from any non-scientific use to keep these treasures of nature and life protected.

Riferimenti bibliografici

  1. Biondi, F. (1992). Development of a tree-ring network for the Italian Peninsula. Tree-Ring Bulletin, 52, 15–29.
  2. Büntgen, U., & Esper, J. (2025). The need for high-resolution paleoclimate research. Dialogous on Climate Change, 2, 18–25. https://doi.org/10.1177/29768659241305959
  3. Büntgen, U., Frank, D., Grudd, H., & Esper, J. (2008). Long-term summer temperature variations in the Pyrenees. Climate Dynamics, 31, 615–631. https://doi.org/10.1007/s00382-008-0390-x
  4. Büntgen, U., Frank, D., Neuenschwander, T., & Esper, J. (2012). Fading temperature sensitivity of Alpine tree growth at its Mediterranean margin and associated effects on large-scale climate reconstructions. Climatic Change, 114, 651–666. https://doi.org/10.1007/s10584-012-0450-4
  5. Büntgen, U., Krusic, P. J., Piermattei, A., Coomes, D. A., Esper, J., Myglan, V. S., Kirdyanov, A. V., Camarero, J. J., Crivellaro, A., & Körner, C. (2019). Limited capacity of tree growth to mitigate the global greenhouse effect under predicted warming. Nature Communications, 10, 2171. https://doi.org/10.1038/s41467-019-10174-4
  6. Büntgen, U., Krusic, P. J., Verstege, A., Sangüesa-Barreda, G., Wagner, S., Camarero, J. J., Ljungqvist, F. C., Zorita, E., Oppenheimer, C., Konter, O., Tegel, W., Gärtner, H., Cherubini, P., Reinig, F., & Esper, J. (2017). New tree-ring evidence from the Pyrenees reveals western Mediterranean climate variability since medieval times. Journal of Climate, 30, 5295–5318. https://doi.org/10.1175/JCLI-D-16-0526.1
  7. Büntgen, U., Reinig, F., Verstege, A., Piermattei, A., Krusic, P. J., Slavin, P., Štěpánek, P., Torbenson, M., Martinez del Castillo, E., Arosio, T., Kirdyanov, A., Oppenheimer, C., Trnka, M., Palosse, A., Bebchuk, T., Camarero, J. J., & Esper, J. (2024). Recent summer warming over the western Mediterranean region is unprecedented since medieval times. Global and Planetary Change, 232, 104336. https://doi.org/10.1016/j.gloplacha.2023.104336
  8. Büntgen, U., Trnka, M., Hulme, M., & Esper, J. (2025). Climate data for climate action. npj Climate Action, 4, 9. https://doi.org/10.1038/s44168-025-00221-w
  9. Carrer, M., Brunetti, M., & Castagneri, D. (2016). The imprint of extreme climate events in century-long time series of wood anatomical traits in high-elevation conifers. Frontiers in Plant Science, 7, 683. https://doi.org/10.3389/fpls.2016.00683
  10. Carrer, M., Unterholzner, L., & Castagneri, D. (2018). Wood anatomical traits highlight complex temperature influence on Pinus cembra at high elevation in the Eastern Alps. International Journal of Biometeorology, 62, 1745–1753. https://doi.org/10.1007/s00484-018-1577-4
  11. Esper, J., Frank, D., Büntgen, U., Verstege, A., Luterbacher, J., & Xoplaki, E. (2007). Long‐term drought severity variations in Morocco. Geophysical Research Letters, 34, L17702. https://doi.org/10.1029/2007GL030844
  12. Esper, J., Hartl, C., Konter, O., Reinig, F., Römer, P., Huneau, F., Lebre, S., Szymczak, S., Bräuning, A., & Büntgen, U. (2022). Past millennium hydroclimate variability from Corsican pine tree‐ring chronologies. Boreas, 51, 621–636. https://doi.org/10.1111/bor.12574
  13. Esper, J., Hartl, C., Tejedor, E., de Luis, M., Günther, B., & Büntgen, U. (2020a). High-resolution temperature variability reconstructed from Black pine tree ring densities in southern Spain. Atmosphere, 11, 748. https://doi.org/10.3390/atmos11070748
  14. Esper, J., Holzkämper, S., Büntgen, U., Schöne, B., Keppler, F., Hartl, C., St. George, S., Riechelmann, D. F. C., & Treydte, K. (2018). Site-specific climatic signals in stable isotope records from Swedish pine forests. Trees, 32, 855–869. https://doi.org/10.1007/s00468-018-1678-z
  15. Esper, J., Klippel, L., Krusic, P. J., Konter, O., Raible, C. C., Xoplaki, E., Luterbacher, J., & Büntgen, U. (2020b). Eastern Mediterranean summer temperatures since 730 CE from Mt. Smolikas tree-ring densities. Climate Dynamics, 54, 1367–1382. https://doi.org/10.1007/s00382-019-05063-x
  16. Esper, J., Konter, O., Klippel, L., Krusic, P. J., & Büntgen, U. (2021). Pre-instrumental summer precipitation variability in northwestern Greece from a high-elevation Pinus heldreichii network. International Journal of Climatology, 41, 2828–2839. https://doi.org/10.1002/joc.6992
  17. Esper, J., Reinig, F., Torbenson, M., del Castillo, E. M., Kunz, M., Arzac, A., Carrer, M., Chen, F., Kadioglu, A. K., Kirdyanov, A. V., Tejedor, E., Trnka, M., & Büntgen, U. (2025). Pan-alpine summer temperatures since 742 CE. Dendrochronologia, 94, 126432. https://doi.org/10.1016/j.dendro.2025.126432
  18. Esper, J., Torbenson, M., & Büntgen, U. (2024). 2023 summer warmth unparalleled over the past 2,000 years. Nature, 631, 94–97. https://doi.org/10.1038/s41586-024-07512-y
  19. Frigo, D., Römer, P., Unterholzner, L., Zimmer-Zachmann, H., Esper, J., Carrer, M., & Ziaco, E. (2024). Review of embedding and non-embedding techniques for quantitative wood anatomy. Dendrochronologia, 88, 126241. https://doi.org/10.1016/j.dendro.2024.126241
  20. Gao, J., Fang, K., Chen, J. M., Li, J., Rossi, S., Chen, D., Linderholm, H. W., Camarero, J. J., Esper, J., Davi, N. K., Au, T. F., & Guo, Z. (2025). Climate-driven patterns of global tree longevity. Communications Earth & Environment, 6, 610. https://doi.org/10.1038/s43247-025-02609-2
  21. Heinrich, I., Touchan, R., Dorado Liñán, I., Vos, H., & Helle, G. (2013). Winter-to-spring temperature dynamics in Turkey derived from tree rings since AD 1125. Climate Dynamics, 41, 1685–1701. https://doi.org/10.1007/s00382-013-1702-3
  22. Holmes, R. L. (1983). Computer-assisted quality control in tree-ring dating and measurement. Tree-Ring Bulletin, 43, 69–78.
  23. Klippel, L., Krusic, P. J., Brandes, R., Hartl, C., Belmecheri, S., Dienst, M., & Esper, J. (2018). A 1286‐year hydro‐climate reconstruction for the Balkan Peninsula. Boreas, 47, 1218–1229. https://doi.org/10.1111/bor.12320
  24. Konter, O., Krusic, P. J., Trouet, V., & Esper, J. (2017). Meet Adonis, Europe’s oldest dendrochronologically dated tree. Dendrochronologia, 42, 12–12. https://doi.org/10.1016/j.dendro.2016.12.001
  25. Liu, J., Xia, S., Zeng, D., Liu, C., Li, Y., Yang, W., Yang, B., Zhang, J., Slik, F., & Lindenmayer, D. B. (2022). Age and spatial distribution of the world’s oldest trees. Conservation Biology, 36, e13907. https://doi.org/10.1111/cobi.13907
  26. Lukač, L., Mikac, S., Urban, O., Kolář, T., Rybníček, M., Ač, A., Trnka, M., & Marek, M. V. (2021). Stable isotopes in tree rings of Pinus heldreichii can indicate climate variability over the eastern Mediterranean region. Forests, 12, 350. https://doi.org/10.3390/f12030350
  27. Mantovani, E., Prendin, A. L., Brunetti, M., Frigo, D., Dibona, R., & Carrer, M. (2026). Phenological shifts in wood formation tracked by frost rings across two centuries. Global Change Biology, 32, e70745. https://doi.org/10.1111/gcb.70745
  28. Marcos, M. M., Tejedor, E., Benito, G., Saz, M. A., Barriendos, M., Martinez del Castillo, E., Esper, J., & de Luis, M. (2025). A five-century tree-ring record from Spain reveals recent intensification of western Mediterranean hydroclimatic extremes. Climate of the Past, 21, 2205–2223. https://doi.org/10.5194/cp-21-2205-2025
  29. Pellizzari, E., Camarero, J. J., Gazol, A., Sangüesa-Barreda, G., & Carrer, M. (2016). Wood anatomy and carbon-isotope discrimination support long-term hydraulic deterioration as a major cause of drought-induced dieback. Global Change Biology, 22, 2125–2137. https://doi.org/10.1111/gcb.13227
  30. Piovesan, G., Biondi, F., Baliva, M., Dinella, A., Di Fiore, L., Marchiano, V., Presutti Saba, E., De Vivo, G., Schettino, A., & Di Filippo, A. (2019). Tree growth patterns associated with extreme longevity: Implications for the ecology and conservation of primeval trees in Mediterranean mountains. Anthropocene, 26, 100199. https://doi.org/10.1016/j.ancene.2019.100199
  31. Piovesan, G., Biondi, F., Baliva, M., Saba, E. P., Calcagnile, L., Quarta, G., D’Elia, M., De Vivo, G., Schettino, A., & Di Filippo, A. (2018). The oldest dated tree of Europe lives in the wild Pollino massif. Ecology, 99, 1682–1684. https://doi.org/10.1002/ecy.2231
  32. Ran, J. H., Shen, T. T., Wu, H., Gong, X., & Wang, X. Q. (2018). Phylogeny and evolutionary history of Pinaceae updated by transcriptomic analysis. Molecular Phylogenetics and Evolution, 129, 106–116. https://doi.org/10.1016/j.ympev.2018.08.011
  33. Rohde, R., Muller, R., Jacobsen, R., Perlmutter, S., Rosenfeld, A., Wurtele, J., Curry, J., Wickham, C., & Mosher, S. (2013). Berkeley earth temperature averaging process. Geoinformatics & Geostatistics: An Overview, 1, 1–13. https://doi.org/10.4172/2327-4581.1000103
  34. Römer, P., Hartl, C., Schneider, L., Bräuning, A., Szymczak, S., Huneau, F., Lebre, S., Reinig, F., Büntgen, U., & Esper, J. (2021). Reduced temperature sensitivity of maximum latewood density formation in high-elevation Corsican pines under recent warming. Atmosphere, 12, 804. https://doi.org/10.3390/atmos12070804
  35. Schulman, E. (1954). Longevity under adversity in conifers. Science, 119, 396–399. https://doi.org/10.1126/science.119.3091.396
  36. Schweingruber, F. H. (1983). Der Jahrring. Standort, Methodik, Zeit und Klima in der Dendrochronologie. Haupt.
  37. Serre-Bachet, F. (1985). Une chronologie pluriseculaire du Sud de l’Italie. Dendrochronologia, 3, 45–66.
  38. Serre-Bachet, F. (1994). Middle ages temperature reconstructions in Europe, a focus on northeastern Italy. Climatic Change, 26, 213–224. https://doi.org/10.1007/BF01092415
  39. Tejedor, E., Benito, G., Serrano-Notivoli, R., González-Rouco, F., Esper, J., & Büntgen, U. (2024). Recent heatwaves as a prelude to climate extremes in the western Mediterranean region. NPJ Climate and Atmospheric Science, 7, 218. https://doi.org/10.1038/s41612-024-00771-6
  40. Ziaco, E., Biondi, F., & Heinrich, I. (2016). Wood cellular dendroclimatology: Testing new proxies in Great Basin bristlecone pine. Frontiers in Plant Science, 7, 1602. https://doi.org/10.3389/fpls.2016.01602