Dataset_Jianping Sun_Ambient climate exceeds the effects of warming and precipitation treatment on leaf senescence phenology of community in an alpine meadow

Understanding the responses of leaf senescence phenology (LSP) to climate change is critical for predicting ecosystem carbon and nutrient cycles. While numerous studies have focused on spring phenology, the mechanisms regulation autumn phenology, particularly under the interactive effects of warming and precipitation changes, remain poorly understood. We also noticed that previous studies based on manipulative experiments have often overlooked the influence of ambient climate (e.g., air temperature, total precipitation and precipitation frequency) to plant autumn phenology, thereby hampering a comprehensive understanding of the mechanisms governing autumn phenological responses. In this study, we conducted a 7-year (2015-2021) field manipulative experiment (including warming (+2 ºC) using infrared heater, decreased precipitation (-50%), increased precipitation (+100% in 2015 and +50% in 2016-2021) and their interactions) on the Qinghai-Xizang Plateau to investigate how warming, precipitation alterations, and ambient climate jointly influence LSP in an alpine meadow.