华东师范大学学报(自然科学版) ›› 2023, Vol. 2023 ›› Issue (6): 125-133.doi: 10.3969/j.issn.1000-5641.2023.06.012

• 生态与环境科学 • 上一篇    

上海不同落叶树种展叶物候的影响因素

张芽茹1,2, 庞育兰1,2, 罗心怡1,2, 徐嘉艺1,2, 杨颜溢1,2, 达良俊1,2,3,4, 宋坤1,2,3,4,*()   

  1. 1. 华东师范大学 生态与环境科学学院, 上海 200241
    2. 华东师范大学 上海市城市化生态过程与生态恢复重点实验室, 上海 200241
    3. 自然资源部大都市区国土空间生态修复工程创新中心, 上海 200062
    4. 崇明生态研究院, 上海 202162
  • 收稿日期:2022-11-22 接受日期:2023-03-16 出版日期:2023-11-25 发布日期:2023-11-23
  • 通讯作者: 宋坤 E-mail:ksong@des.ecnu.edu.cn
  • 基金资助:
    上海市科委项目 (22DZ1202102, 22DZ1208502)

Driving factors of leaf-unfolding phenology in deciduous trees in Shanghai

Yaru ZHANG1,2, Yulan PANG1,2, Xinyi LUO1,2, Jiayi XU1,2, Yanyi YANG1,2, Liangjun DA1,2,3,4, Kun SONG1,2,3,4,*()   

  1. 1. School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
    2. Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai 200241, China
    3. Technology Innovation Center for Land Spatial Eco-Restoration in Metropolitan Area, Ministry of Natural Resources, Shanghai 200062, China
    4. Institute of Eco-Chongming, Shanghai 202162, China
  • Received:2022-11-22 Accepted:2023-03-16 Online:2023-11-25 Published:2023-11-23
  • Contact: Kun SONG E-mail:ksong@des.ecnu.edu.cn

摘要:

为探究城市环境差异对树木展叶物候的影响, 以上海城市森林中的纯林为研究对象, 利用遥感数据提取9种树木的展叶开始时间, 并分析其与温度、降水和夜间灯光之间的关系. 结果显示如下. ① 展叶时间在物种之间存在差异, 平均展叶时间从第95天至第104天; 相比之下, 展叶时间的种内差异更大, 最早为第69天, 最晚为第138天. ② 不同物种展叶物候对环境因子的响应不同: 乌桕对降水变化最敏感, 复羽叶栾对降水变化和城市化水平敏感, 池杉对降水和温度变化敏感, 其余6种树木对环境变化不敏感. ③ 对于敏感物种, 生长季前的平均降水量从48 mm增加64 mm, 展叶开始时间提前45 d; 平均温度每增加1℃, 展叶开始时间延迟3 d. 因而, 城市森林建设可以根据树种物候的环境响应特点来进行合理配置, 使其能更好地适应环境, 发挥相应的生态作用.

关键词: 人工纯林, 展叶时间, 种间差异, 影响因素

Abstract:

To investigate the influence of urban environmental differences on the leaf-unfolding phenology of trees, we extracted the leaf unfolding information of nine tree species using remote sensing data and analyzed their relationships with temperature, precipitation, and nighttime light in a pure forest in Shanghai. The results showed that : ① there were significant differences in the average onset of the leaf-unfolding phenology among species, from 95th to 104th day of the year; contrastingly, intra-species variation in leaf-unfolding date was greater, ranging from 69th to 138th day of the year. ② Different species exhibited different leaf phenology in response to environmental factors. Triadica sebifera was the most sensitive to precipitation changes, Taxodium distichum var. imbricatum was sensitive to precipitation changes and urbanization, and Koelreuteria bipinnata was sensitive to precipitation and climate changes. Other species were not sensitive to any environmental changes. ③ For species sensitive to environmental changes, the leaf-unfolding date was 45 days earlier when the average precipitation increase from 48 mm to 64 mm, and delayed by three days for every 1°C increase in average temperature before the growing season. The study showed that urban forest construction can be reasonably configured according to the response characteristics of a species to the environment, so that plants can better adapt to the environment and fulfill their roles in the ecosystem.

Key words: pure forest plantation, leaf-unfolding date, interspecific variation, influence factors

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