Drought shortens subtropical understory growing season by advancing leaf senescence

Bibliographische Detailangaben
Veröffentlicht in:	Global change biology. - 1999. - 30(2024), 5 vom: 07. Mai, Seite e17304
1. Verfasser:	Sun, Huanfa (VerfasserIn)
Weitere Verfasser:	Yan, Liming, Li, Zhao, Cheng, Wanying, Lu, Ruiling, Xia, Xingli, Ping, Jiaye, Bian, Chenyu, Wei, Ning, You, Cuihai, Tang, Songbo, Du, Ying, Wang, Jing, Qiao, Yang, Cui, Erqian, Zhou, Xuhui, Xia, Jianyang
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2024
Zugriff auf das übergeordnete Werk:	Global change biology
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't extreme drought growing season leaf senescence phenology subtropical forest understory Water 059QF0KO0R Soil

Beschreibung
Zusammenfassung:	© 2024 John Wiley & Sons Ltd. Subtropical forests, recognized for their intricate vertical canopy stratification, exhibit high resistance to extreme drought. However, the response of leaf phenology to drought in the species-rich understory remains poorly understood. In this study, we constructed a digital camera system, amassing over 360,000 images through a 70% throughfall exclusion experiment, to explore the drought response of understory leaf phenology. The results revealed a significant advancement in understory leaf senescence phenology under drought, with 11.75 and 15.76 days for the start and end of the leaf-falling event, respectively. Pre-season temperature primarily regulated leaf development phenology, whereas soil water dominated the variability in leaf senescence phenology. Under drought conditions, temperature sensitivities for the end of leaf emergence decreased from -13.72 to -11.06 days °C-1, with insignificance observed for the start of leaf emergence. Consequently, drought treatment shortened both the length of the growing season (15.69 days) and the peak growth season (9.80 days) for understory plants. Moreover, this study identified diverse responses among intraspecies and interspecies to drought, particularly during the leaf development phase. These findings underscore the pivotal role of water availability in shaping understory phenology patterns, especially in subtropical forests
Beschreibung:	Date Completed 07.05.2024 Date Revised 07.05.2024 published: Print Citation Status MEDLINE
ISSN:	1365-2486
DOI:	10.1111/gcb.17304