Hydrothermal Regime Variation and Ecological Effects on Fish Reproduction in the Yangtze River

Water temperature, as one of the important water environment impact factors, has a significant impact on the survival and development of aquatic organisms. We selected water temperature data (1959–2017) from four key hydrological stations in the Yangtze River: Cuntan, Yichang, Hankou, and Datong. We...

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Autores principales:	Wenxian Guo, Ning He, Gaofei Dou, Jianwen Hu, Hongxiang Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hydrothermal regime water temperature wavelet analysis IHA-RVA method ecological effects on fish Medicine R
Acceso en línea:	https://doaj.org/article/c44526683ce8432687ce13fd79c4a9cf
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spelling	oai:doaj.org-article:c44526683ce8432687ce13fd79c4a9cf2021-11-25T17:50:33ZHydrothermal Regime Variation and Ecological Effects on Fish Reproduction in the Yangtze River10.3390/ijerph1822120391660-46011661-7827https://doaj.org/article/c44526683ce8432687ce13fd79c4a9cf2021-11-01T00:00:00Zhttps://www.mdpi.com/1660-4601/18/22/12039https://doaj.org/toc/1661-7827https://doaj.org/toc/1660-4601Water temperature, as one of the important water environment impact factors, has a significant impact on the survival and development of aquatic organisms. We selected water temperature data (1959–2017) from four key hydrological stations in the Yangtze River: Cuntan, Yichang, Hankou, and Datong. We analyzed the characteristics and variability of the Yangtze River hydrothermal regime by the Mann-Kendall method, wavelet analysis, and by the IHA-RVA method to analyze hydrothermal regime variations of the Yangtze River, and the response mechanisms of fish to variations in hydrothermal regimes were explored. The results show that (1) The annual average water temperature of the Yangtze River is warming, and Cuntan Station, Yichang Station, Hankou Station, and Datong Station have a sudden increase in temperature in 2002, 1995, 2003, and 2004, and the periodicity analysis demonstrates that Cuntan, Yichang, and Datong stations all have main periods of 24~32 years; (2) The overall variations of 32 hydrothermal indicators at Cuntan Station and Yichang Station reached 65% and 61%, which are close to the height variation; (3) With the construction of the Three Gorges Dam, the stagnant cooling effect caused the arrival date of the upper reproduction water temperature of “The four major fish species” to be delayed by about 23 days, and the stagnant heat effect caused the arrival date of the Chinese sturgeon reproduction upper limit water temperature to be delayed by about 30 days.Wenxian GuoNing HeGaofei DouJianwen HuHongxiang WangMDPI AGarticlehydrothermal regimewater temperaturewavelet analysisIHA-RVA methodecological effects on fishMedicineRENInternational Journal of Environmental Research and Public Health, Vol 18, Iss 12039, p 12039 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hydrothermal regime water temperature wavelet analysis IHA-RVA method ecological effects on fish Medicine R
spellingShingle	hydrothermal regime water temperature wavelet analysis IHA-RVA method ecological effects on fish Medicine R Wenxian Guo Ning He Gaofei Dou Jianwen Hu Hongxiang Wang Hydrothermal Regime Variation and Ecological Effects on Fish Reproduction in the Yangtze River
description	Water temperature, as one of the important water environment impact factors, has a significant impact on the survival and development of aquatic organisms. We selected water temperature data (1959–2017) from four key hydrological stations in the Yangtze River: Cuntan, Yichang, Hankou, and Datong. We analyzed the characteristics and variability of the Yangtze River hydrothermal regime by the Mann-Kendall method, wavelet analysis, and by the IHA-RVA method to analyze hydrothermal regime variations of the Yangtze River, and the response mechanisms of fish to variations in hydrothermal regimes were explored. The results show that (1) The annual average water temperature of the Yangtze River is warming, and Cuntan Station, Yichang Station, Hankou Station, and Datong Station have a sudden increase in temperature in 2002, 1995, 2003, and 2004, and the periodicity analysis demonstrates that Cuntan, Yichang, and Datong stations all have main periods of 24~32 years; (2) The overall variations of 32 hydrothermal indicators at Cuntan Station and Yichang Station reached 65% and 61%, which are close to the height variation; (3) With the construction of the Three Gorges Dam, the stagnant cooling effect caused the arrival date of the upper reproduction water temperature of “The four major fish species” to be delayed by about 23 days, and the stagnant heat effect caused the arrival date of the Chinese sturgeon reproduction upper limit water temperature to be delayed by about 30 days.
format	article
author	Wenxian Guo Ning He Gaofei Dou Jianwen Hu Hongxiang Wang
author_facet	Wenxian Guo Ning He Gaofei Dou Jianwen Hu Hongxiang Wang
author_sort	Wenxian Guo
title	Hydrothermal Regime Variation and Ecological Effects on Fish Reproduction in the Yangtze River
title_short	Hydrothermal Regime Variation and Ecological Effects on Fish Reproduction in the Yangtze River
title_full	Hydrothermal Regime Variation and Ecological Effects on Fish Reproduction in the Yangtze River
title_fullStr	Hydrothermal Regime Variation and Ecological Effects on Fish Reproduction in the Yangtze River
title_full_unstemmed	Hydrothermal Regime Variation and Ecological Effects on Fish Reproduction in the Yangtze River
title_sort	hydrothermal regime variation and ecological effects on fish reproduction in the yangtze river
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c44526683ce8432687ce13fd79c4a9cf
work_keys_str_mv	AT wenxianguo hydrothermalregimevariationandecologicaleffectsonfishreproductionintheyangtzeriver AT ninghe hydrothermalregimevariationandecologicaleffectsonfishreproductionintheyangtzeriver AT gaofeidou hydrothermalregimevariationandecologicaleffectsonfishreproductionintheyangtzeriver AT jianwenhu hydrothermalregimevariationandecologicaleffectsonfishreproductionintheyangtzeriver AT hongxiangwang hydrothermalregimevariationandecologicaleffectsonfishreproductionintheyangtzeriver
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Hydrothermal Regime Variation and Ecological Effects on Fish Reproduction in the Yangtze River

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