北京师范大学学报（自然科学版）2025，Vol.61Issue(2)：207-216,10.DOI:10.12202/j.0476-0301.2024145
西宁市主要湿地挺水植物光合与蒸腾作用的时空变化和影响因素研究
Spatial and temporal variations and influencing factors of photosynthesis and transpiration of emergent plants in urban wetlands in Xining city
摘要
Abstract
Emergent plants,an important component of urban wetland vegetation,absorb carbon dioxide and release oxygen via photosynthesis;these plants also regulate humidity through transpiration,playing an important role to improve well-beings of urban residents in high-altitude and arid areas.The physiological indexes and environmental parameters of reed(Phragmites australis)and cattails(Typha orientalis)in different places and different time periods were measured in this study,to dissect characteristics and influencing factors of their spatiotemporal changes.Net photosynthetic rate showed multiple peaks each day,with cattails(14.72 μmol·m-2·s-1)higher than reed(8.46μmol·m-2·s-1).Transpiration rate of cattails(7.68 mmol·m-2·s-1)was higher than reed(3.90 mmol·m-2·s-1).Water-use efficiency showed unimodal diurnal variation,with reed(2.34 μmol·mmol-1)higher than cattails(2.03 μmol·mmol-1).Net photosynthetic rate of reed and cattails was higher at inlet than at outlet.Transpiration rate of reed at inlet was higher than at outlet,cattails at outlet was higher than at inlet.Water-use efficiency of reed at inlet was lower than at outlet,but there was no significant spatial difference in water use efficiency for cattails.Photosynthetically active radiation,water vapor pressure difference,atmospheric temperature and water quality were important factors affecting the spatio-temporal changes of photosynthesis and transpiration of emergent plants.Carbon fixation and oxygen release capacity and humidifying ability of cattail were higher than reed.These data will support evaluating and improving ecosystem services of wetlands in Xining city.关键词
高原城市/城市湿地/挺水植物/光合作用/蒸腾作用Key words
city on the plateau/urban wetland/emergent plants/photosynthesis/transpiration分类
生物学引用本文复制引用
张春娜,刘志锋,左晔,张凤娇,毛旭锋..西宁市主要湿地挺水植物光合与蒸腾作用的时空变化和影响因素研究[J].北京师范大学学报（自然科学版）,2025,61(2):207-216,10.基金项目
第二次青藏高原综合科学考察研究资助项目(2019QZKK0405) （2019QZKK0405）
青海省自然科学基金面上资助项目(2023-ZJ-929M) （2023-ZJ-929M）
