气候变化领域集成服务门户(CCPortal): Exploring potential trade-offs in outdoor water use reductions and urban tree ecosystem services during an extreme drought in Southern California

CCPortal

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
	Torres, Rachel; Tague, Christina L.; McFadden, Joseph P.
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/290953
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	Torres, Rachel,Tague, Christina L.,McFadden, Joseph P.. 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	Torres, Rachel,Tague, Christina L.,&McFadden, Joseph P..(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	Torres, Rachel,et al."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).