Why lowland riparian trees are difficult to use for streamflow reconstruction

IF 3.4 2区 农林科学 Q1 FORESTRY Journal of Forestry Research Pub Date : 2024-03-20 DOI:10.1007/s11676-024-01713-x
Xiaomei Peng, Shengchun Xiao, Bao Yang, Quanyan Tian, Vladimir V. Shishov
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Abstract

Existing streamflow reconstructions based on tree-ring analysis mostly rely on species from upland, mainly montane areas, while lowland species (generally plain) areas are rarely used. This limits the understanding of streamflow change history in the lowlands, which is an important basis for water resource management. This study focused on Populus euphratica stands located along the main stream, eastern and western tributaries in the lower reaches of the Heihe River basin (HRb), in arid northwestern China. We investigated how streamflow regulation interferes with riparian trees in lowlands when they used for streamflow reconstruction. Tree-ring width chronologies were developed and analyzed in conjunction with meteorological and hydrologic observation data. The results show streamflow regulation leads in sharp fluctuations in the streamflow allocation between the eastern tributaries and western tributaries. This resulted in instability of the correlation between streamflow at the two tributaries and at the Zhengyixia hydrologic station, with corresponding fluctuations in radial growth of poplar trees on the banks of the two tributaries and at the station. Streamflow regulation altered the natural patterns of seasonal streamflow below the station, changing the time window of poplar response. This study provides useful insight into tree-ring width based streamflow reconstruction in the lowlands.

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低地河岸树木为何难以用于重建溪流
现有的基于树环分析的溪流重建大多依赖于高地(主要是山地)的物种,而低地物种(一般是平原)地区则很少使用。这限制了对低洼地区溪流变化历史的了解,而溪流变化历史是水资源管理的重要依据。本研究的重点是位于中国西北干旱地区黑河流域(HRb)下游干流、东部和西部支流沿岸的欧洲山杨。我们研究了低地河岸树木在用于重建河流时如何影响河流调节。我们结合气象和水文观测数据建立并分析了树环宽度年代学。结果表明,溪流调节导致东部支流和西部支流之间的溪流分配出现剧烈波动。这导致两条支流和正乙峡水文站的流量相关性不稳定,两条支流两岸和正乙峡水文站的杨树径向生长量也随之波动。水流调节改变了水文站下方季节性水流的自然规律,从而改变了杨树反应的时间窗口。这项研究为基于树环宽度的低地河流流量重建提供了有益的启示。
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来源期刊
CiteScore
7.30
自引率
3.30%
发文量
2538
期刊介绍: The Journal of Forestry Research (JFR), founded in 1990, is a peer-reviewed quarterly journal in English. JFR has rapidly emerged as an international journal published by Northeast Forestry University and Ecological Society of China in collaboration with Springer Verlag. The journal publishes scientific articles related to forestry for a broad range of international scientists, forest managers and practitioners.The scope of the journal covers the following five thematic categories and 20 subjects: Basic Science of Forestry, Forest biometrics, Forest soils, Forest hydrology, Tree physiology, Forest biomass, carbon, and bioenergy, Forest biotechnology and molecular biology, Forest Ecology, Forest ecology, Forest ecological services, Restoration ecology, Forest adaptation to climate change, Wildlife ecology and management, Silviculture and Forest Management, Forest genetics and tree breeding, Silviculture, Forest RS, GIS, and modeling, Forest management, Forest Protection, Forest entomology and pathology, Forest fire, Forest resources conservation, Forest health monitoring and assessment, Wood Science and Technology, Wood Science and Technology.
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