气候变化领域集成服务门户(CCPortal): Weakened hydrological oscillation period increased the frequency of river algal blooms

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DOI	10.1016/j.watres.2024.121496
	Weakened hydrological oscillation period increased the frequency of river algal blooms
	Hu, Qiang; Chen, Yan; Xia, Rui; Liu, Xiaoyu; Jia, Ruining; Zhang, Kai; Li, Xiaoxuan; Yan, Chao; Wang, Yao; Yin, Yingze; Li, Xiang; Ming, Junde
发表日期	2024
ISSN	0043-1354
EISSN	1879-2448
起始页码	255
卷号	255
英文摘要	The evolution of riverine aquatic ecosystems typically exhibits notable characteristic with cumulative, enduring, and hysteresis. Exploring the non-linear response of riverine ecology to long-term hydrological fluctuations become a major challenge in contemporary interdisciplinary research. In response to the critical issue of frequent river algal blooms in the lower Han River, which is impacted by Asian largest inter-basin water diversion project. We identified the non-linear response of eco-hydrology across various time scales through the integration of Continuous Wavelet Transform (CWT) and Inverse Wavelet Transform (IWT). Our study revealed that: 1) Over the past half century, the hydrological regime in the lower Han river showed a significant downward trend, and existed three significant hydrological oscillation periods (HOPs), including the short-scale Intra-AC (180 days), the medium-scale AC (365 days, the first major period), and the long-scale Inter-AC (2500 days), the variation of Inter-AC changed most dramatically. 2) We further found that the Inter-AC variation of hydrology is more closely related to the formation of river algal blooms in the Han River, and when the hydrological Inter-AC shows steady state or downward trend, the frequency of algal blooms in the lower Han River increases significantly. 3) The river algal blooms in the lower Han River is a cumulative consequence to the long-term hydrological influences. Weakened hydrological Inter-AC is more likely to increase the frequency of river algal blooms, and 10-years Inter-AC cumulation increased the frequency by 60%. Therefore, the weaken of long-scale HOP will significantly increase the frequency of river algal blooms in the future. This study received a critical scientific insight and aimed at provide guidance for the optimization of ecological management within the framework of national large-scale water conservation.
英文关键词	Han River; River algal blooms; Hydrological oscillation period; Non-linear response; Wavelet transform; Long-term impact
语种	英语
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS记录号	WOS:001218182900001
来源期刊	WATER RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301756
作者单位	Chinese Research Academy of Environmental Sciences; Chinese Academy of Sciences; Chongqing Institute of Green & Intelligent Technology, CAS; Northwest University Xi'an; Chinese Research Academy of Environmental Sciences
推荐引用方式 GB/T 7714	Hu, Qiang,Chen, Yan,Xia, Rui,et al. Weakened hydrological oscillation period increased the frequency of river algal blooms[J],2024,255.
APA	Hu, Qiang.,Chen, Yan.,Xia, Rui.,Liu, Xiaoyu.,Jia, Ruining.,...&Ming, Junde.(2024).Weakened hydrological oscillation period increased the frequency of river algal blooms.WATER RESEARCH,255.
MLA	Hu, Qiang,et al."Weakened hydrological oscillation period increased the frequency of river algal blooms".WATER RESEARCH 255(2024).