生态系统
峰度
气孔导度
特质
生态学
偏斜
生物
生产力
温带气候
利基
适应(眼睛)
干旱
环境科学
用水效率
大气科学
植物
数学
统计
光合作用
宏观经济学
经济
地质学
神经科学
程序设计语言
灌溉
计算机科学
作者
Congcong Liu,Lawren Sack,Ying Li,Nianpeng He
摘要
Abstract Shifts in stomatal trait distributions across contrasting environments and their linkage with ecosystem productivity at large spatial scales have been unclear. Here, we measured the maximum stomatal conductance (g), stomatal area fraction (f), and stomatal space-use efficiency (e, the ratio of g to f) of 800 plant species ranging from tropical to cold-temperate forests, and determined their values for community-weighted mean, variance, skewness, and kurtosis. We found that the community-weighted means of g and f were higher in drier sites, and thus, that drought ‘avoidance’ by water availability-driven growth pulses was the dominant mode of adaptation for communities at sites with low water availability. Additionally, the variance of g and f was also higher at arid sites, indicating greater functional niche differentiation, whereas that for e was lower, indicating the convergence in efficiency. When all other stomatal trait distributions were held constant, increasing kurtosis or decreasing skewness of g would improve ecosystem productivity, whereas f showed the opposite patterns, suggesting that the distributions of inter-related traits can play contrasting roles in regulating ecosystem productivity. These findings demonstrate the climatic trends of stomatal trait distributions and their significance in the prediction of ecosystem productivity.
科研通智能强力驱动
Strongly Powered by AbleSci AI