Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake

We investigated whether recent springtime water temperature increases in a shallow eutrophic lake affected bottom sediment temperature and fluxes of ammonia (NH4+) and phosphate (PO43−) from the sediment. We conducted a lake-wide survey of Lake Kasumigaura, Japan, and analyzed the relationship betwe...

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Autores principales:	Ryuichiro Shinohara, Kenji Tsuchiya, Ayato Kohzu
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	nutrient release sediment temperature simulation spring warming Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/6c148102bc4c430687d406e2765cff4a
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spelling	oai:doaj.org-article:6c148102bc4c430687d406e2765cff4a2021-11-09T23:59:44ZWarming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake2040-22442408-935410.2166/wcc.2021.145https://doaj.org/article/6c148102bc4c430687d406e2765cff4a2021-11-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/7/3187https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354We investigated whether recent springtime water temperature increases in a shallow eutrophic lake affected bottom sediment temperature and fluxes of ammonia (NH4+) and phosphate (PO43−) from the sediment. We conducted a lake-wide survey of Lake Kasumigaura, Japan, and analyzed the relationship between water temperature increases in spring and NH4+ and PO43− release fluxes. We also developed a numerical model to analyze how water temperature increase affects sediment temperature. Water temperature in May increased during 2010–2019 at a rate of 1.8–3.2 °C decade−1. The numerical simulation results showed that the water temperature increase was accompanied by a sediment temperature increase from a minimum of 18.3 °C in 2011 to a maximum of 21.6 °C in 2015. Despite the substantial difference in the observed sediment temperature (2.9 °C), no significant differences in NH4+ and PO43− fluxes in May between 2013/2014 and 2015 were found. These results suggest that both water and sediment temperatures are increasing in Lake Kasumigaura in spring, but it is unclear whether this warming has affected NH4+ and PO43− releases from the sediment. However, because a nonlinear response to sediment temperature was observed, future springtime warming may accelerate NH4+ and PO43− releases. HIGHLIGHTS A water temperature increase was observed in spring by a trend analysis.; Sediment temperature also increased with the increase of water temperature.; Ammonia and phosphate releases from bottom sediment were little changed by warming.;Ryuichiro ShinoharaKenji TsuchiyaAyato KohzuIWA Publishingarticlenutrient releasesediment temperaturesimulationspring warmingEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 7, Pp 3187-3199 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nutrient release sediment temperature simulation spring warming Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	nutrient release sediment temperature simulation spring warming Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Ryuichiro Shinohara Kenji Tsuchiya Ayato Kohzu Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake
description	We investigated whether recent springtime water temperature increases in a shallow eutrophic lake affected bottom sediment temperature and fluxes of ammonia (NH4+) and phosphate (PO43−) from the sediment. We conducted a lake-wide survey of Lake Kasumigaura, Japan, and analyzed the relationship between water temperature increases in spring and NH4+ and PO43− release fluxes. We also developed a numerical model to analyze how water temperature increase affects sediment temperature. Water temperature in May increased during 2010–2019 at a rate of 1.8–3.2 °C decade−1. The numerical simulation results showed that the water temperature increase was accompanied by a sediment temperature increase from a minimum of 18.3 °C in 2011 to a maximum of 21.6 °C in 2015. Despite the substantial difference in the observed sediment temperature (2.9 °C), no significant differences in NH4+ and PO43− fluxes in May between 2013/2014 and 2015 were found. These results suggest that both water and sediment temperatures are increasing in Lake Kasumigaura in spring, but it is unclear whether this warming has affected NH4+ and PO43− releases from the sediment. However, because a nonlinear response to sediment temperature was observed, future springtime warming may accelerate NH4+ and PO43− releases. HIGHLIGHTS A water temperature increase was observed in spring by a trend analysis.; Sediment temperature also increased with the increase of water temperature.; Ammonia and phosphate releases from bottom sediment were little changed by warming.;
format	article
author	Ryuichiro Shinohara Kenji Tsuchiya Ayato Kohzu
author_facet	Ryuichiro Shinohara Kenji Tsuchiya Ayato Kohzu
author_sort	Ryuichiro Shinohara
title	Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake
title_short	Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake
title_full	Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake
title_fullStr	Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake
title_full_unstemmed	Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake
title_sort	warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/6c148102bc4c430687d406e2765cff4a
work_keys_str_mv	AT ryuichiroshinohara warmingofwatertemperatureinspringandnutrientreleasefromsedimentinashalloweutrophiclake AT kenjitsuchiya warmingofwatertemperatureinspringandnutrientreleasefromsedimentinashalloweutrophiclake AT ayatokohzu warmingofwatertemperatureinspringandnutrientreleasefromsedimentinashalloweutrophiclake
_version_	1718440752444342272

Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake

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