Sedimentary History of Trace Metals Over the Past Half-Century in Songkhla Lake, Western Coast of the Gulf of Thailand: Anthropogenic Impacts and Contamination Assessment

Coastal lagoons are among the most vulnerable and economically significant ecosystems on Earth. Songkhla Lake, connected with the Gulf of Thailand, is the second largest lake in Southeast Asia and supports the development of the fishery, transportation, and tourism industries in southern Thailand. W...

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Autores principales:	Ke Dong, Shuqing Qiao, Bin Wu, Xuefa Shi, Yufei Chen, Xin Shan, Shengfa Liu, Narumol Kornkanitnan, Somkiat Khokiattiwong
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	lagoon Songkhla Lake Gulf of Thailand modern sedimentation anthropogenic activities trace metal contamination Science Q
Acceso en línea:	https://doaj.org/article/55041bc887b1435aab217aaee53490da
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spelling	oai:doaj.org-article:55041bc887b1435aab217aaee53490da2021-12-01T13:15:07ZSedimentary History of Trace Metals Over the Past Half-Century in Songkhla Lake, Western Coast of the Gulf of Thailand: Anthropogenic Impacts and Contamination Assessment2296-646310.3389/feart.2021.767899https://doaj.org/article/55041bc887b1435aab217aaee53490da2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/feart.2021.767899/fullhttps://doaj.org/toc/2296-6463Coastal lagoons are among the most vulnerable and economically significant ecosystems on Earth. Songkhla Lake, connected with the Gulf of Thailand, is the second largest lake in Southeast Asia and supports the development of the fishery, transportation, and tourism industries in southern Thailand. With increasing anthropogenic disturbances, the lake is facing acute ecological problems and further research is needed. Here, we provide 55-year record of grain size, color reflectance, magnetic susceptibility, total organic carbon, total nitrogen, and trace element (As, Hg, Pb, Cr, Ni, Cu, and Zn) concentrations of sediment core SKL8-2 collected from Songkhla Lake. These records reveal a three-stage sedimentary and input history of trace metals under anthropogenic effects: 1) From 1964 to 1982, it was a natural terrigenous input period with a relative reduction environment when the channel connecting Songkhla Lake and the Gulf of Thailand was closed. 2) Trace metal concentrations, organic carbon content, b* value, and magnetic susceptibility changed abruptly in 1982. During 1982–2000, the sources of trace metals were more complex than during 1964–1982 and mainly came from urban wastewater, industrial effluent, and fishery discharge. 3) From 2000 to 2019, contamination signals of Pb, Hg, As, Zn, and Ni emerged in the first decade because of the rapid development and poor sewage treatment around nearby cities.Ke DongShuqing QiaoShuqing QiaoBin WuBin WuXuefa ShiXuefa ShiYufei ChenXin ShanXin ShanShengfa LiuShengfa LiuNarumol KornkanitnanSomkiat KhokiattiwongFrontiers Media S.A.articlelagoonSongkhla LakeGulf of Thailandmodern sedimentationanthropogenic activitiestrace metal contaminationScienceQENFrontiers in Earth Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	lagoon Songkhla Lake Gulf of Thailand modern sedimentation anthropogenic activities trace metal contamination Science Q
spellingShingle	lagoon Songkhla Lake Gulf of Thailand modern sedimentation anthropogenic activities trace metal contamination Science Q Ke Dong Shuqing Qiao Shuqing Qiao Bin Wu Bin Wu Xuefa Shi Xuefa Shi Yufei Chen Xin Shan Xin Shan Shengfa Liu Shengfa Liu Narumol Kornkanitnan Somkiat Khokiattiwong Sedimentary History of Trace Metals Over the Past Half-Century in Songkhla Lake, Western Coast of the Gulf of Thailand: Anthropogenic Impacts and Contamination Assessment
description	Coastal lagoons are among the most vulnerable and economically significant ecosystems on Earth. Songkhla Lake, connected with the Gulf of Thailand, is the second largest lake in Southeast Asia and supports the development of the fishery, transportation, and tourism industries in southern Thailand. With increasing anthropogenic disturbances, the lake is facing acute ecological problems and further research is needed. Here, we provide 55-year record of grain size, color reflectance, magnetic susceptibility, total organic carbon, total nitrogen, and trace element (As, Hg, Pb, Cr, Ni, Cu, and Zn) concentrations of sediment core SKL8-2 collected from Songkhla Lake. These records reveal a three-stage sedimentary and input history of trace metals under anthropogenic effects: 1) From 1964 to 1982, it was a natural terrigenous input period with a relative reduction environment when the channel connecting Songkhla Lake and the Gulf of Thailand was closed. 2) Trace metal concentrations, organic carbon content, b* value, and magnetic susceptibility changed abruptly in 1982. During 1982–2000, the sources of trace metals were more complex than during 1964–1982 and mainly came from urban wastewater, industrial effluent, and fishery discharge. 3) From 2000 to 2019, contamination signals of Pb, Hg, As, Zn, and Ni emerged in the first decade because of the rapid development and poor sewage treatment around nearby cities.
format	article
author	Ke Dong Shuqing Qiao Shuqing Qiao Bin Wu Bin Wu Xuefa Shi Xuefa Shi Yufei Chen Xin Shan Xin Shan Shengfa Liu Shengfa Liu Narumol Kornkanitnan Somkiat Khokiattiwong
author_facet	Ke Dong Shuqing Qiao Shuqing Qiao Bin Wu Bin Wu Xuefa Shi Xuefa Shi Yufei Chen Xin Shan Xin Shan Shengfa Liu Shengfa Liu Narumol Kornkanitnan Somkiat Khokiattiwong
author_sort	Ke Dong
title	Sedimentary History of Trace Metals Over the Past Half-Century in Songkhla Lake, Western Coast of the Gulf of Thailand: Anthropogenic Impacts and Contamination Assessment
title_short	Sedimentary History of Trace Metals Over the Past Half-Century in Songkhla Lake, Western Coast of the Gulf of Thailand: Anthropogenic Impacts and Contamination Assessment
title_full	Sedimentary History of Trace Metals Over the Past Half-Century in Songkhla Lake, Western Coast of the Gulf of Thailand: Anthropogenic Impacts and Contamination Assessment
title_fullStr	Sedimentary History of Trace Metals Over the Past Half-Century in Songkhla Lake, Western Coast of the Gulf of Thailand: Anthropogenic Impacts and Contamination Assessment
title_full_unstemmed	Sedimentary History of Trace Metals Over the Past Half-Century in Songkhla Lake, Western Coast of the Gulf of Thailand: Anthropogenic Impacts and Contamination Assessment
title_sort	sedimentary history of trace metals over the past half-century in songkhla lake, western coast of the gulf of thailand: anthropogenic impacts and contamination assessment
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/55041bc887b1435aab217aaee53490da
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Sedimentary History of Trace Metals Over the Past Half-Century in Songkhla Lake, Western Coast of the Gulf of Thailand: Anthropogenic Impacts and Contamination Assessment

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