城市化对上海市城乡梯度上植物爆芽与展叶物候的影响  

Impact of urbanization on bud burst and leaf unfolding phenology of plants along urban-rural gradient in Shanghai,China

作　　者：庄铭皓 赵生寿 毕星 武彩燕 王萌 李俊祥 ZHUANG Minghao;ZHAO Shengshou;BI Xing;WU Caiyan;WANG Meng;LI Junxiang(Department of Landscape Architecture,School of Design,Shanghai Jiao Tong University,Shanghai 200240,China;Ecological and Environmental Monitoring Station of Xining City,Xining 810000,China)

机构地区：[1]上海交通大学设计学院风景园林系,上海200240 [2]西宁市生态环境监测站,西宁810000

出　　处：《生态学报》2024年第6期2396-2405,共10页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(31370482)。

摘　　要：城市化影响植物物候,春季物候,如爆芽和展叶是植物响应城市化的客观生物指示。然而在城乡梯度上植物物候如何变化,以及物候与城市化程度是否存在定量关系,尚不明确。利用上海市2条城乡梯度上的6种木本植物的春季物候观测数据,以及距市中心距离作为城市化程度的代理指标,研究植物的爆芽和展叶物候期在城乡梯度上的变化及其与城市化程度的关系。研究结果表明:6种城市木本植物的爆芽和展叶物候期呈现随着距市中心距离的增加而延迟的趋势;城市化程度代理指标与爆芽和展叶物候期之间存在线性关系,城市化代理指标距市中心距离可以解释物候期延迟的31.5%—96.7%;物候期延迟时间因物种和距离城市距离而异,爆芽期延迟时间为3—15 d,展叶始期延长时间为4—13 d,展叶盛期延长时间为3—9 d。上述结果对理解城市化对植物物候的影响机制,评估城市化对城市生态系统的影响具有积极意义。Urbanization influences plant phenology.The spring phenology,such as the bud burst and lead unfolding are key biological indicators of plant response to urbanization.However,how plant phenology changes along the urban-rural gradient and whether there is significantly quantitative relationship between phenology and urbanization degree in this transition zone remain unclear.In this study,we used the observed spring phenology data of six common urban woody plant species stand along two urban-rural transects from urban center to rural areas in Shanghai,and the distance to the city center as a proxy for urbanization degree.We investigated the variations of plant bud burst and leaf unfolding phenophases along the urbanrural gradients and their relationships with urbanization degree.The results showed that the bud burst and leaf unfolding phenophases of the six plant species were considerably delayed with the increasing of distance from the city center.There was a linear relationship between the urbanization degree and the phenophases of bud burst and leaf unfolding,respectively.The urbanization degree,i.e.,the distance to the city center,could explain 31.5—96.7%of the variations in the phenophases delay.The delay time of the bud burst,the start of leaf unfolding,and the full leaf unfolding of the six plant species were ranged from 3—15 days,4—13 days,and 3—9 days,respectively.These findings can provide insights for understanding the mechanisms of urban plant phenology and assessing the impacts of urbanization on urban ecosystem services.

关 键 词：植物物候 爆芽期 展叶期 城市化 梯度分析 

分 类 号：Q948[生物学—植物学]