Nocturnal plant respiration is under strong non-temperature control

报告题目： Nocturnal plant respiration is under strong non-temperature control

主讲人:Lina Mercado，Geography at University of Exeter

时间: 2022年11月4日（周五）16:00-17:00

清华大学地学系官方微博直播 ZOOM（ID：546 737 0885 Code: 20221104）

讲座简介：

Most biological rates depend on the rate of respiration. Temperature variation is typically considered the main driver of daily plant respiration rates, assuming a constant daily respiration rate at a set temperature. Here, we show empirical data from 31 species from temperate and tropical biomes to demonstrate that the rate of plant respiration at a constant temperature decreases monotonically with time through the night, on average by 25% after 8 hours of darkness. Temperature controls less than half of the total nocturnal variation in respiration. A new universal formulation is developed to model and understand nocturnal plant respiration, combining the nocturnal decrease in the rate of plant respiration at constant temperature with the decrease in plant respiration according to the temperature sensitivity. Application of the new formulation shows a global reduction of 4.5 -6 % in plant respiration and an increase of 7-10% in net primary production for the present-day.

主讲人简介：

Dr Mercado is an Associate professor in Ecosystems and Environmental Change at the University of Exeter. Her work is at the interface between observation and vegetation model with focus on improving the representation of plant physiological processes within JULES, the land surface model of the UK Earth System model (UKESM) in order to improve climate prediction. She currently leads work using manipulation and observational studies to (i) determine thermal acclimation of tropical montane forest species (ii) model the effects of soil fertility on tropical forest carbon cycling iii) quantify non-temperature control mechanisms of nocturnal plant respiration on net primary productivity.

主讲人照片