生物群落
环境科学
初级生产
降水
沙漠和干旱灌木丛
陆地生态系统
生产力
生态系统
气候学
气候变化
全球变化
大气科学
自然地理学
生态学
地理
生物
地质学
气象学
经济
栖息地
宏观经济学
作者
François Ritter,Max Berkelhammer,Cynthia Garcia-Eidell
标识
DOI:10.1038/s43247-020-00034-1
摘要
Abstract Climate change will impact precipitation variability, potentially accelerating climate-terrestrial carbon feedbacks. However, the response of ecosystems to precipitation variability is difficult to constrain due to myriad physiological and abiotic variables that limit terrestrial productivity. Based on a combination of satellite imagery and a global network of daily precipitation data, we present here a statistical framework to isolate the impact of precipitation variability on the gross primary productivity of five biomes that collectively account for 50% of global land area. The productivity of mesic grasslands and forests decreases by ~28% and ~7% (respectively) in response to more irregular rain within the year, while the sensitivity is halved in response to higher year-to-year variability. Xeric grasslands are similarly impacted by intra-annual rainfall variance, but they show an increase in productivity with higher interannual rainfall variability. Conversely, the productivity of boreal forests increases under higher variability on both timescales. We conclude that projected changes in precipitation variability will have a measurable global impact on the terrestrial carbon sink.
科研通智能强力驱动
Strongly Powered by AbleSci AI