城市森林年龄结构的变化影响生态系统服务的价值

IF 2.4 Q3 ENVIRONMENTAL SCIENCES Frontiers in Sustainable Cities Pub Date : 2023-11-07 DOI:10.3389/frsc.2023.1265610
Miia M. Mänttäri, Leena Lindén, Eeva-Maria Tuhkanen
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摘要

为了实现恢复力目标,城市规划者和决策者需要关于城市树木提供的效益以及管理可能对其产生的影响的准确信息。本研究探讨了管理和干扰对芬兰图尔库城市森林结构和功能的影响。利用综合的城市树木数据库和i-Tree软件,我们评估了图尔库城市森林的现有结构,并估计了城市森林提供的生态系统服务价值。此外,我们还模拟了50年期间城市森林的变化,考虑了不同的植树方案和亚洲长角甲虫(ALB)的潜在爆发。图尔库城市森林共有公共树木38438棵,以平槭、西洋松、木犀、白桦为主。估计碳储量为12,336吨,价值198万欧元,年固碳率为284吨(45,549欧元/年)。这些树木每年还清除了8.97吨污染物,估计价值为153,273欧元。按照目前的植树速度,树木的数量将在50年内减少,从而导致提供的生态系统服务逐渐减少。即使在白桦桦中度侵袭的情况下,将植树率提高一倍也能缓慢增加碳的储存和固存,但当树木死亡率达到50%时,仍不足以抵消白桦桦桦造成的损害。与碳储存和固碳相比,城市森林年龄结构的变化对空气污染的清除具有更直接的影响。这些发现强调了优先投资城市森林的重要性,因为它们有能力提供多样化的生态系统服务。将这些发现纳入决策过程将促进可持续和有弹性的城市环境。
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Change in urban forest age structure affects the value of ecosystem services provided
To achieve resilience goals, urban planners and decision-makers need accurate information on the benefits provided by urban trees and on the effects that management may have on them. This study investigates the impacts of management and disturbances on urban forest structure and function in Turku, Finland. Using a comprehensive urban tree database and the i-Tree software suite, we assessed the current structure and estimated the value of ecosystem services provided by Turku's urban forest. Additionally, we simulated changes in the urban forest over a 50-year period, considering different tree planting scenarios and the potential outbreak of the Asian longhorned beetle (ALB). Turku's urban forest comprised 38,438 public trees, dominated by Acer platanoides, Pinus sylvestris, Tilia × europaea, and Betula pendula. The estimated carbon storage was 12,336 t, valued at 1.98 million €, with an annual sequestration rate of 284 t (45,549 €/year). The trees also removed 8.97 t of pollutants annually, with an estimated value of 153,273 €. At the current rate of tree planting, the number of trees would decline over the course of 50 years resulting in a gradual decrease in the provision of ecosystem services. Although doubling the tree planting rate could slowly increase carbon storage and sequestration even under moderate ALB attack, it was insufficient to offset the damage caused by ALB if tree mortality rate reaches 50%. Compared to carbon storage and sequestration, changes in urban forest age structure had a more immediate impact on the removal of air pollution. These findings emphasize the importance of prioritizing investments in urban forests on grounds of their capacity to provide diverse ecosystem services. Incorporating these findings into decision-making processes would promote sustainable and resilient urban environments.
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来源期刊
CiteScore
4.00
自引率
7.10%
发文量
176
审稿时长
13 weeks
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