干旱半干旱区生态系统凝结水的影响因素及其作用研究进展

Review on the influencing factors and functions of condensated water in arid and semi-arid ecosystems

凝结水是干旱半干旱生态系统重要的水分补给来源,对于维持生态系统功能具有重要意义。综述了干旱半干旱生态系统气象条件、地形环境和植被属性等因素对凝结水形成的影响,以及气候和环境变化对凝结水产量的影响机制。在此基础上,进一步从植被生长、生物土壤结皮、小型动物、微生物和地表水热平衡过程等方面,探讨了凝结水产量变化对干旱半干旱生态系统组成和过程的重要作用。最后对未来相关研究提出以下建议:(1)增加长时间序列的凝结水观测数据分析,(2)系统探讨凝结水对干旱半干旱区生态系统功能的综合影响,并(3)完善气候变化背景下凝结水与生态系统关系的相关研究。本文旨在对该领域的未来研究提出综述、建议和展望。

In arid and semi-arid regions,condensated water is one of the most important sources of water supply to maintain the ecosystem function.In this paper,we reviewed the effects of meteorological conditions,topographic environment and vegetation attributes on the formation and yield of condensated water in arid and semi-arid ecosystems,as well as the mechanism of condensated water′s influence on ecosystem function.The relationship between the condensated water variation and compositions of arid and semi-arid ecosystem was also discussed from the aspects of vegetation growth,biological soil crust,small animals,microorganisms,and surface water-heat processes.Finally,several suggestions for future research on the condensated water were provided in this paper.We should improve the observation and data analysis of condensated water in a long time series in future research,systematically discuss the comprehensive effects of the condensed water on ecosystem functions in arid and semi-arid regions,and further strengthen the study of the relationship between condensated water and ecosystems under climate change.