Advances on the Water Cycle Process of Eucalyptus Plantation Based on Carbon,Hydrogen and Oxygen Isotopes
Eucalyptus,an important tree species for establishing fast-growing timber forest in the southern region of China,plays a crucial role in plantation resource of China.However,the ecological and environmental issues induced by Eucalyptus planting have been attracted more attentions.Especially,it remains controversial in some issues,such as whether Eucalyptus plantation is a"water pump",whether large-scale development of Eucalyptus plantations leads to soil drought and groundwater level decrease.Carbon,hydrogen,and oxygen stable isotopes technology can be used as a more effective and convenient method for quantitatively studying the water cycle process of terrestrial ecosystem.Specifically,this technology can systematically clarify the hydrological process,transformation relationship of various water bodies and plant water use efficiency in Eucalyptus plantation ecosystems.This paper systematically summarized the main research progress on the applications of carbon,hydrogen,and oxygen stable isotopes in water cycle processes(including precipitation,canopy throughfall,surface water,soil water,plant xylem water,groundwater,and evaporated water)and plant water use efficiency in Eucalyptus plantation ecosystems.Furthermore,this paper pointed out the shortcomings of the current researches on water cycle processes in Eucalyptus plantations based on stable isotope and looked forward to its future studies and application prospects.The results can provide a scientific basis for the optimized management of water resources in the Eucalyptus plantations under the context of sustainable management in China.
Eucalyptus plantationhydrogen and oxygen stable isotopesstable carbon isotopewater cycle processesplant water use
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