DOI: 10.1016/j.gloplacha.2016.11.010
论文题名: Losing water in temporary streams on a Mediterranean island: Effects of climate and land-cover changes
作者: Garcia C. ; Amengual A. ; Homar V. ; Zamora A.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2017
卷: 148 起始页码: 139
结束页码: 152
语种: 英语
英文关键词: Budyko graph
; Mallorca
; Mann-Kendall
; Mediterranean climate
; Multiple linear regression
; Number of days with flow
; Streamflow elasticity
; Temporary streams
Scopus关键词: Biodiversity
; Ecosystems
; Elasticity
; Evapotranspiration
; Flow graphs
; Forestry
; Landforms
; Linear regression
; Rivers
; Stream flow
; Budyko graph
; Mallorca
; Mann-Kendall
; Mediterranean climates
; Multiple linear regressions
; Number of days with flow
; Temporary streams
; Climate change
英文摘要: Temporary streams are unique, sensitive and threatened fluvial systems. They periodically dry up and contribute to biodiversity by supporting different species. In Mediterranean regions, human pressures and climate change increase the duration of the dry period for the streams. We analysed the annual and seasonal trends on streamflow data from 14 gauging stations on temporary streams on the island of Mallorca. We used a Mann–Kendall trend test on data from 1977 to 2009 (33 years) to identify trends in discharge, number of days with water, accumulated precipitation, potential evapotranspiration (PET), and land cover change. Results show a general decreasing trend of streamflow during spring and summer, with flows reduced between 4 and 17% in some basins. Although the inter-annual variability is high for both seasons, the decrease in annual precipitation, the increase in temperature, and the effects of colonization and growth of forests explain the reduction in the number of days with running water. Correlation and elasticity analyses show that precipitation is the main driver for streamflow reduction, but the increase in temperature and land-cover changes also play a significant role in the decreasing of flows. These seasonal changes especially affect the headwaters of the basins, which are located in a mountainous area. The Kendall regional test, applied to the 12 basins considered in the Tramuntana range, reveals a significant decreasing annual trend in the number of days with measured flow. The forest expansion and the warmer conditions cause a higher vegetation water demand, increasing the real evapotranspiration and, consequently, reducing the runoff and thus increasing the losses in the water balance. In addition, the increase in the number of days during which channels and parafluvial habitats are disconnected negatively affects the aquatic habitat. This paper provides the first evidence of a consistent long-term reduction in flow in temporary streams in the Mediterranean region. We highlight the ecological implications of losing water in temporary streams across Mallorca, and we argue the urgent need for conservation plans to protect them from present and future changes and challenges. © 2016 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006827065&doi=10.1016%2fj.gloplacha.2016.11.010&partnerID=40&md5=10d9dca77aca13bbc9b48d059fd67f82
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11788
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Department of Geography, University of the Balearic Islands, Palma, Balearic Islands, Spain
Recommended Citation:
Garcia C.,Amengual A.,Homar V.,et al. Losing water in temporary streams on a Mediterranean island: Effects of climate and land-cover changes[J]. Global and Planetary Change,2017-01-01,148.