Important role of precipitation in controlling a more uniform spring phenology in the Qinba Mountains, China

• DOI: 10.3389/fpls.2023.1074405
• Publication Date: 2023-02-08T04:46:39Z
• Authors: Jianhao Li; Jingyun Guan; Wangqiang Han; Ruikang Tian; Binbin Lu; Danlin Yu; Jianghua Zheng
• Keywords: 0207 environmental engineering; Plant culture; Plant Science; 02 engineering and technology; 15. Life on land; precipitation; more uniform; SB1-1110; spring phenology; elevation gradients; 13. Climate action; Qinba Mountains

Under global warming, the gradual pattern of spring phenology along elevation gradients (EG) has significantly changed. However, current knowledge on phenomenon a more uniform is mainly focused effect temperature and neglected precipitation. This study aimed to determine whether occurs EG in Qinba Mountains (QB) explore precipitation this pattern. We used Savitzky-Golay (S-G) filtering extract start season (SOS) forest from MODIS Enhanced Vegetation Index (EVI) during 2001-2018 determined main drivers SOS patterns by partial correlation analyses. The showed trend QB with rate 0.26 ± 0.01 days 100 m -1 per decade 2001-2018, but there were differences around 2011. A delayed at low elevations was possibly due reduced (SP) (ST) between 2001 Additionally, an advanced high may have been caused increased SP winter (WT). These divergent trends contributed significant 0.85 0.02 decade. Since 2011, higher (especially elevations) rising ST SOS, lower altitudes than altitudes, resulting greater (0.54 decade). direction controlling elevations. important effects local ecosystem stability. Our findings could provide theoretical basis for establishing ecological restoration measures areas experiencing similar trends.