时    间：2023年11月22日 (星期三) 12:40-14:00

地    点：农生学院创新楼（B楼）104会议室

主办单位：农生学院学科与科技办、农生学院青年教师联谊会

报告题目：碳源汇之谜：城市中碳汇树种的选择困境

报告摘要：

环境胁迫会影响森林的碳源汇过程。然而，城市人工林如何在不同的时间尺度上响应环境胁迫，还缺少足够的数据支撑。基于10年的野外样地调查数据，野外台站碳通量观测数据，以及生态系统模型模拟，提供了详实的树木生长和固碳参数，揭示了上海城市森林的碳源汇动态及其与树种选择、环境变化的密切关系。这些研究结果，可以为双碳目标下的树种选择与合理布局，以及人工林经营管理、生态系统服务提质增效提供理论依据。

报告人简介：

郑吉博士于2021年在十大网赌信誉官网排名获得生态学博士学位，同年进入农生院博士后流动站继续开展研究工作。主要研究方向为城市森林生态系统结构、功能和维持机制，在人工林碳汇、生物多样性与生态系统功能关系、森林生态系统模型等方面取得了较为丰富的成果，以第一作者和主要合作者在Science of the Total Environment、Journal of Environmental Management、Urban Forestry & Urban Greening等国际刊物上发表论文10余篇。

【所在学科研究组研究方向】：

1）城市景观生态及3S技术应用；

2）城市生态系统长期定位观测和生态系统服务；

3）植物与污染物的交互作用；

4）城市森林生态系统结构、功能和维持机制；

5）生物地球化学循环及DNDC模型。

【代表性著作】：

1. Zheng, J., Sun, N., Yan, J., Liu, C., Yin, S. (2023). Decoupling between carbon source and sink induced by responses of daily stem growth to water availability in subtropical urban forests, Science of the Total Environment (http://doi.org/10.1016/j.scitotenv.2023.162802).
2. Zheng, J., A. Ali, X. Wei, and C. Liu. (2022). The role of biodiversity in mitigating the effects of nutrient limitation and short-term rotations in plantations of subtropical China. Journal of Environmental Management, 303:114140.
3. Zheng, J., Zang, H., Yin, S., Sun, N., Zhu, P., Han, Y., Kang, H., Liu, C. (2018). Modeling height-diameter relationship for artificial monoculture Metasequoia glyptostroboides in sub-tropic coastal megacity Shanghai, China. Urban Forestry & Urban Greening, 34, 226-232.

ACADEMIC SALON (XLVI)

SPEAKER: Ji Zheng

Postdoctor, Department of Resource and Environmental Science, SAB

TIME ：12:40-14:00 November 22th, 2023 (Wed)

VENUE：Room 104, Building B, SAB

ORGANIZER：Office of Discipline and Science & Technology, SAB;

Young Teachers Association, SAB

TITLE： 

The Mystery of Carbon Source and Sink: the Selection Dilemma of Tree Species in Cities

ABSTRACT：

Environmental stress can affect the carbon source and sink processes of forests. However, there is still a lack of sufficient data support on how urban forests respond to environmental stress at different time scales. Based on 10 years of field survey data, carbon flux observation data, and ecosystem model simulations, detailed tree growth and carbon sequestration capacity are provided, revealing the carbon source and sink dynamics of urban forests in Shanghai and their close relationship with tree species selection and environmental changes. These research results can provide theoretical basis for the selection and reasonable layout of tree species under the Carbon Target, as well as the management of urban forests and the improvement of ecosystem services quality and efficiency.