Inherent Water-Use Efficiency of Different Forest Ecosystems and Its Relations to Climatic Variables

编号 010034504

推送时间 20220530

研究领域 森林生态 

年份 2022 

类型 期刊 

语种 英语

标题 Inherent Water-Use Efficiency of Different Forest Ecosystems and Its Relations to Climatic Variables

来源期刊 forest

期 第345期

发表时间 20220517

关键词 evapotranspiration;  environmental factors;  FLUXNET;  net primary productivity; 

摘要 Inherent water-use efficiency (IWUE) is a vital parameter connecting the carbon and water cycles. However, the factors influencing the IWUE in different forest ecosystems are still a subject of debate. In this work, FLUXNET platform measurements of 67 forest sites were used to detect trends of the IWUE of four forest ecosystems, namely deciduous broadleaf forests (DBF), evergreen broadleaf forests (EBF), needle-leaf forests (ENF), and mixed forests (MF). The IWUE differed significantly among different forest ecosystems and positively correlated with temperature and solar radiation. The IWUE of EBF was the highest at 32.02 g·C·Kg·H2O?1. The values of DBF and MF were similar and higher than that of ENF. With increasing latitude, the IWUE increased first and then decreased, with a maximum of 35° N. The IWUE of EBF was negatively correlated with precipitation and leaf area index. Temperature and solar radiation were the main factors controlling the IWUE of forest ecosystems, whereas precipitation was the major factor controlling the inter-annual variation in the ΔIWUE of forest ecosystems. Our results provide a scientific basis for the study of forest carbon sinks, forest eco-hydrological processes, and forest ecosystem responses to global climatic changes. View Full-Text

服务人员 王璐

服务院士 蒋有绪

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