Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026192 |
Groundwater Buffers Drought Effects and Climate Variability in Urban Reserves | |
Marchionni, V1; Daly, E.1; Manoli, G.2; Tapper, N. J.3; Walker, J. P.1; Fatichi, S.4,5 | |
2020-04-27 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; England; Switzerland; Singapore |
英文摘要 | Groundwater can have a critical role in sustaining the functioning of natural ecosystems during droughts, especially in dry and seasonally dry climates. However, the response to droughts of ecosystems embedded in urban areas is not well known. This study investigates how different scenarios of groundwater availability control the water balance and vegetation productivity of two urban reserves hosting native vegetation in the Melbourne metropolitan area, Australia. Using a mechanistic ecohydrological model supported by field observations, long-term simulations were run to explore the impact of groundwater flow on water, carbon, and energy fluxes under present climatic conditions, including the Millennium Drought (2001-2009), and in response to perturbations in key environmental variables (air temperature, atmospheric CO2 concentrations, and rainfall). It was found that the presence of a water table and its capillary fringe within the root depths supports ecosystem transpiration and vegetation productivity. The effects of declining groundwater were found to be more severe in predominantly sandy soils because of the lower water holding capacity, identifying that the water status of vegetation differs significantly depending on soil type. Differences in rooting strategies and groundwater availability also had a pivotal role in helping plants soften the impacts of increased air temperature (T-a) and make use of higher atmospheric CO2 concentrations. Increased T-a strongly affected evapotranspiration, enhancing the competition for water between different vegetation types. These results provide quantitative insights of how vegetation responds to groundwater depletion and climate variability, highlighting the essential role of groundwater resources in urban ecosystems characterized by seasonally dry climates. |
英文关键词 | urban reserves cities groundwater-dependent ecosystems ecohydrology |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000537736400008 |
WOS关键词 | WATER-USE EFFICIENCY ; VEGETATION ; PATTERNS ; IMPACTS ; FOREST ; HEAT ; ECOSYSTEMS ; DYNAMICS ; DEPTH ; TREE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249168 |
专题 | 资源环境科学 |
作者单位 | 1.Monash Univ, Dept Civil Engn, Melbourne, Vic, Australia; 2.Univ Coll Ondon, Dept Civil Environm & Geomat Engn, London, England; 3.Monash Univ, Sch Earth Atmosphere & Environm, Melbourne, Vic, Australia; 4.Swiss Fed Inst Technol, Inst Environm Engn, Zurich, Switzerland; 5.Natl Univ Singapore, Dept Civil & Environm Engn, Singapore, Singapore |
推荐引用方式 GB/T 7714 | Marchionni, V,Daly, E.,Manoli, G.,et al. Groundwater Buffers Drought Effects and Climate Variability in Urban Reserves[J]. WATER RESOURCES RESEARCH,2020,56(5). |
APA | Marchionni, V,Daly, E.,Manoli, G.,Tapper, N. J.,Walker, J. P.,&Fatichi, S..(2020).Groundwater Buffers Drought Effects and Climate Variability in Urban Reserves.WATER RESOURCES RESEARCH,56(5). |
MLA | Marchionni, V,et al."Groundwater Buffers Drought Effects and Climate Variability in Urban Reserves".WATER RESOURCES RESEARCH 56.5(2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论