Trophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake

Trophic state index (TSI) can assess lake trophic status and trace in-situ metabolism, exhibiting a high potential in explaining autochthonous carbon dioxide (CO2) in aquatic environments. However, there remains a knowledge gap in how TSI links to the partial pressure of CO2 (pCO2) generated and con...

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Autores principales:	Maofei Ni, Qiushi Ge, Siyue Li, Zhikang Wang, Yunjie Wu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Trophic state index Partial pressure of CO2 Biological processes Carbonate dissolution Karst plateau lake Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/5ce9399db5ae4a1c8620e4731864a512
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spelling	oai:doaj.org-article:5ce9399db5ae4a1c8620e4731864a5122021-12-01T04:28:59ZTrophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake1470-160X10.1016/j.ecolind.2020.106912https://doaj.org/article/5ce9399db5ae4a1c8620e4731864a5122021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20308517https://doaj.org/toc/1470-160XTrophic state index (TSI) can assess lake trophic status and trace in-situ metabolism, exhibiting a high potential in explaining autochthonous carbon dioxide (CO2) in aquatic environments. However, there remains a knowledge gap in how TSI links to the partial pressure of CO2 (pCO2) generated and consumed in lakes. Here we explored the temporal variations of lake pCO2 and TSI, as well as their linkages in a karst plateau lake. Lake pCO2 ranged from 90.1 to 7169.3 μatm and was significantly high in the post-wet period (2534.3 ± 1637.9 μatm). Over 58% of samples were found to be supersaturated in CO2 with respect to the atmospheric equilibrium (410 μatm). Biological and hydrological processes regulated lake trophic status, resulting in mesotrophic state (30 < TSI < 50) in the post-wet period and eutrophic state (TSI > 50) in the drought and initial-wet periods. Coupled carbonate dissolution and photosynthesis consumed the pCO2, whereas groundwater and respiration contributed the pCO2 in the karst lake. Our results highlighted that lake TSI could decipher trophic status and further partially explain the pCO2 dynamics and sources.Maofei NiQiushi GeSiyue LiZhikang WangYunjie WuElsevierarticleTrophic state indexPartial pressure of CO2Biological processesCarbonate dissolutionKarst plateau lakeEcologyQH540-549.5ENEcological Indicators, Vol 120, Iss , Pp 106912- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Trophic state index Partial pressure of CO2 Biological processes Carbonate dissolution Karst plateau lake Ecology QH540-549.5
spellingShingle	Trophic state index Partial pressure of CO2 Biological processes Carbonate dissolution Karst plateau lake Ecology QH540-549.5 Maofei Ni Qiushi Ge Siyue Li Zhikang Wang Yunjie Wu Trophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake
description	Trophic state index (TSI) can assess lake trophic status and trace in-situ metabolism, exhibiting a high potential in explaining autochthonous carbon dioxide (CO2) in aquatic environments. However, there remains a knowledge gap in how TSI links to the partial pressure of CO2 (pCO2) generated and consumed in lakes. Here we explored the temporal variations of lake pCO2 and TSI, as well as their linkages in a karst plateau lake. Lake pCO2 ranged from 90.1 to 7169.3 μatm and was significantly high in the post-wet period (2534.3 ± 1637.9 μatm). Over 58% of samples were found to be supersaturated in CO2 with respect to the atmospheric equilibrium (410 μatm). Biological and hydrological processes regulated lake trophic status, resulting in mesotrophic state (30 < TSI < 50) in the post-wet period and eutrophic state (TSI > 50) in the drought and initial-wet periods. Coupled carbonate dissolution and photosynthesis consumed the pCO2, whereas groundwater and respiration contributed the pCO2 in the karst lake. Our results highlighted that lake TSI could decipher trophic status and further partially explain the pCO2 dynamics and sources.
format	article
author	Maofei Ni Qiushi Ge Siyue Li Zhikang Wang Yunjie Wu
author_facet	Maofei Ni Qiushi Ge Siyue Li Zhikang Wang Yunjie Wu
author_sort	Maofei Ni
title	Trophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake
title_short	Trophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake
title_full	Trophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake
title_fullStr	Trophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake
title_full_unstemmed	Trophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake
title_sort	trophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/5ce9399db5ae4a1c8620e4731864a512
work_keys_str_mv	AT maofeini trophicstateindexlinkedtopartialpressureofaquaticcarbondioxideinatypicalkarstplateaulake AT qiushige trophicstateindexlinkedtopartialpressureofaquaticcarbondioxideinatypicalkarstplateaulake AT siyueli trophicstateindexlinkedtopartialpressureofaquaticcarbondioxideinatypicalkarstplateaulake AT zhikangwang trophicstateindexlinkedtopartialpressureofaquaticcarbondioxideinatypicalkarstplateaulake AT yunjiewu trophicstateindexlinkedtopartialpressureofaquaticcarbondioxideinatypicalkarstplateaulake
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Trophic state index linked to partial pressure of aquatic carbon dioxide in a typical karst plateau lake

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