20.500.12556/DiRROS-27542 Temperature and photoperiod interactions influence the cessation of wood growth in three temperate and boreal conifers Cambium phenology is a crucial process in wood production and carbon sequestration of forest ecosystems. Although cambium phenology has been widely studied, research specifically focusing on the cessation of wood formation remains limited. To better understand the influence of environmental and intrinsic factors on the cessation of wood formation, we built and compared three ecophysiological models (temperature sum model, photoperiod-influenced temperature sum model and soil moisture- and photoperiod-influenced temperature sum model) in their ability to predict the date of cessation of xylem cell enlargement (cE) in three major Northern Hemisphere conifer species (Black spruce, Norway spruce and Scots pine). We developed these models based on xylogenesis data collected for 130 site‐years across Europe and Canada. Our results demonstrate that the photoperiod-influenced temperature sum model is well-supported by data across all conifer species, with a RMSE of 9.2 days, suggesting that both temperature and photoperiod are critical drivers of wood growth cessation. However, incorporating soil moisture effects does not improve model performance. Our model effectively captures the inter-site variability in cE across a wide environmental gradient, with a fair model efficiency (ME = 0.51 ± 0.22), but performed less well for annual anomalies (ME = 0.10 ± 0.09). Additionally, we found that the total ring cell number also affected prediction accuracy. Using this model, we reconstructed historical trends in cE over the past six decades and found a trend to delayed cessation dates. This delay varied geographically, with slower shifts at higher latitudes and elevations, likely due to constrained cambial responses and conservative growth strategies in colder regions. Our model framework offers a simple yet accurate approach for predicting wood growth cessation at large spatial scales, providing a basis for integrating cambium phenology into land surface models and forest productivity assessments. cambium phenology ecophysiological models xylem formation climate change global warming northern hemisphere forests fenologija kambija ekofiziološki modeli nastanek ksilema podnebne spremembe globalno segrevanje gozdovi severne poloble true false true Angleški jezik Slovenski jezik Znanstveno delo 2026-02-12 09:56:21 2026-02-12 09:56:21 2026-02-13 03:50:50 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Opis vira z dne 12. 2. 2026; str. 1-11 [article no.] ǂ111056 Vol. 379 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-02-04 630*81 0168-1923 10.1016/j.agrformet.2026.111056 268213763 1-s2.0-S0168192326000419-main.pdf 1-s2.0-S0168192326000419-main.pdf 1 7989C5BBF8FE6A4F4D8E0DE466DFD64B 2dc926422091479c4f5056990ec7b6f6273dfe27716c51ba06d2e0c4c1b278b3 d5dca786-07f0-11f1-bcbc-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=40339 https://www.sciencedirect.com/science/article/pii/S0168192326000419 0 f26c02fd-07f0-11f1-bcbc-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=40340 Gozdarski inštitut Slovenije 0 0 0