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| DOI | 10.3389/fclim.2024.1280615 |
| Exploring potential trade-offs in outdoor water use reductions and urban tree ecosystem services during an extreme drought in Southern California | |
| 发表日期 | 2024 |
| EISSN | 2624-9553 |
| 起始页码 | 6 |
| 卷号 | 6 |
| 英文摘要 | In Southern California cities, urban trees play a vital role in alleviating heat waves through shade provision and evaporative cooling. Trees in arid to semi-arid regions may rely on irrigation, which is often the first municipal water use to be restricted during drought, causing further drought stress. Finding a balance between efficient water use and maintaining tree health will be crucial for long-term urban forestry and water resources management, as climate change will increase drought and extreme heat events. This study aimed to quantify how urban tree water and carbon fluxes are affected by irrigation reductions, and how that relationship changes with tree species and temperature. We used an ecohydrologic model that mechanistically simulates water, carbon, and energy cycling, parameterized for 5 common tree species in a semi-arid urban area. We simulated a range of irrigation reductions based on average outdoor water use data from the city for a recent extreme drought as well as with warmer temperatures. We then analyzed the response of model outcomes of plant carbon fluxes, leaf area index (LAI), and water use. Results show that reducing irrigation up to 25%, a comparable amount as the California state mandate in 2014, has minimal effects on tree primary productivity and water use efficiency. We found that transpiration was linearly related to irrigation input, which could lead to a short-term loss of evaporative cooling with irrigation reductions during drought. However, primary productivity and LAI had a nonlinear response to irrigation, indicating shade provision could be maintained throughout drought with partial irrigation reductions. Results varied across tree species, with some species showing greater sensitivity of productivity to both irrigation reductions and potentially warmer droughts. These results have implications for water resources management before and during drought, and for urban tree climate adaptation to future drought. |
| 英文关键词 | ecohydrology; urban water use; ecosystem services; urban forestry; water conservation; drought resilience; climate change adaptation |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences ; Environmental Studies |
| WOS记录号 | WOS:001199392600001 |
| 来源期刊 | FRONTIERS IN CLIMATE
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/290952 |
| 作者单位 | University of California System; University of California Santa Barbara; University of California System; University of California Santa Barbara |
| 推荐引用方式 GB/T 7714 | . Exploring potential trade-offs in outdoor water use reductions and urban tree ecosystem services during an extreme drought in Southern California[J],2024,6. |
| APA | (2024).Exploring potential trade-offs in outdoor water use reductions and urban tree ecosystem services during an extreme drought in Southern California.FRONTIERS IN CLIMATE,6. |
| MLA | "Exploring potential trade-offs in outdoor water use reductions and urban tree ecosystem services during an extreme drought in Southern California".FRONTIERS IN CLIMATE 6(2024). |
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