Department of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Korea.
BK21 FOUR Research & Education Center for Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Korea.
Int J Environ Res Public Health. 2022 Jan 31;19(3):1625. doi: 10.3390/ijerph19031625.
Increases in particulate matter in cities threaten both public health and ecosystems. Street trees, which are a corridor-type green infrastructure capable of absorbing particulate matter, have been promoted as one possible solution to this problem. However, planting selected trees solely with the goal of reducing particulate matter may adversely affect street tree ecosystem resilience by inhibiting species diversity. This study aims to investigate urban street tree planting strategies that reduce particulate matter while maintaining ecosystem resilience. To this end, a study site in Suwon, South Korea was selected, and street tree planting scenarios were developed based on the selected site information. A scenario analysis was conducted using a system dynamics model. The model simulated the long-term trends under each scenario regarding the amount of particulate matter absorbed by the trees and the changes in species diversity. The analysis results clearly show that strategic planting of street trees while focusing on only a specific purpose-reducing particulate matter-can adversely affect ecosystem resilience. The scenario analysis also revealed that increasing the number of street trees while maintaining a balance among various species is the best option for reducing particulate matter without degrading species diversity. Additionally, the results support the need to plant evergreen species to consider the winter season.
城市中颗粒物的增加既威胁着公众健康，也威胁着生态系统。街道树木作为一种能够吸收颗粒物的走廊式绿色基础设施，已被作为解决这一问题的一种可能方案而受到推崇。然而，仅仅为了减少颗粒物而选择种植特定的树木，可能会通过抑制物种多样性而对街道树木生态系统的恢复力产生不利影响。本研究旨在探讨在降低颗粒物的同时保持生态系统恢复力的城市街道树木种植策略。为此，选择了韩国水原市的一个研究地点，并根据选定的地点信息制定了街道树木种植方案。使用系统动力学模型进行了情景分析。该模型模拟了每种方案下树木吸收的颗粒物数量以及物种多样性变化的长期趋势。分析结果清楚地表明，只关注特定目的——减少颗粒物——的战略性种植街道树木可能会对生态系统的恢复力产生不利影响。情景分析还表明，在不降低物种多样性的情况下，增加街道树木的数量并保持各种物种之间的平衡是减少颗粒物的最佳选择。此外，结果还支持种植常绿树的必要性，以考虑冬季。
