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Article: The Application of the Generalized Additive Model to Represent Macrobenthos near Xiaoqing Estuary, Laizhou Bay.

Liu, Lulei / Li, Ang / Zhu, Ling / Xue, Suyan / Li, Jiaqi / Zhang, Changsheng / Yu, Wenhan / Ma, Zhanfei / Zhuang, Haonan / Jiang, Zengjie / Mao, Yuze

Biology

2023 Volume 12, Issue 8

Abstract: ... of the macrobenthos community and environmental factors near Xiaoqing Estuary, Laizhou Bay. Responses ...

Abstract	Macrobenthos is widely used as an indicator of ecological health in marine monitoring and assessment. The present study aimed to characterize the interrelationships between the distribution of the macrobenthos community and environmental factors near Xiaoqing Estuary, Laizhou Bay. Responses of species richness to environmental factors were studied using the generalized additive model (GAM) and the Margalef diversity index (
Language	English
Publishing date	2023-08-18
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2661517-4
ISSN	2079-7737
ISSN	2079-7737
DOI	10.3390/biology12081146
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Article ; Online: Assessment of eutrophication from Xiaoqing River estuary to Laizhou Bay: Further warning of ecosystem degradation in typically polluted estuary.

Zhang, Feifei / Fu, Hongrui / Lou, Huawei / Sun, Xiaojun / Zhang, Dong / Sun, Peiyan / Wang, Xinping / Li, Yiming / Lu, Jinren / Bao, Mutai

Marine pollution bulletin

2023 Volume 193, Page(s) 115209

Abstract	The coast of Laizhou Bay is plagued by a number of environmental issues, such as eutrophication, which are likely to worsen over the next few decades as a result of trends toward industrialization and urbanization. High nutrient levels in the Xiaoqing River are believed to be the main cause of Laizhou Bay becoming eutrophicated. Therefore, we conducted two cruises from the Xiaoqing River estuary to Laizhou Bay in August 2022 and December 2022, respectively, in the wet and dry periods to assess the potential impact of status of eutrophication due to human activities. The results showed that the concentration of DIN was higher than the quality standard for water (f
MeSH term(s)	Humans ; Ecosystem ; Rivers ; Estuaries ; Bays ; Environmental Monitoring/methods ; Eutrophication ; China ; Nitrogen/analysis
Chemical Substances	Nitrogen (N762921K75)
Language	English
Publishing date	2023-06-25
Publishing country	England
Document type	Journal Article
ZDB-ID	2001296-2
ISSN	1879-3363 ; 0025-326X
ISSN (online)	1879-3363
ISSN	0025-326X
DOI	10.1016/j.marpolbul.2023.115209
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Article ; Online: Adsorption and environmental behavior of mercury on suspended particulate matter from the Yellow River and Xiaoqing River estuaries.

Cao, Sijing / Liang, Shengkang / Li, Yanbin

The Science of the total environment

2023 Volume 893, Page(s) 164860

Abstract: ... higher than those of dissolved Hg (DHg) at the Xiaoqing River Estuary (XRE) and the Yellow River Estuary ...

Abstract	Estuaries control the amount of Hg transported from rivers to coastal seas. The adsorption of Hg(II) on suspended particulate matter (SPM) is the key process that affects the behavior of Hg in estuaries since most riverine Hg is deposited with SPM in estuaries. In this study, the concentrations of particulate Hg (PHg) were higher than those of dissolved Hg (DHg) at the Xiaoqing River Estuary (XRE) and the Yellow River Estuary (YRE), indicating that SPM plays a crucial role in controlling the fate of Hg in estuaries. A higher partition coefficient (logKd) of Hg was observed at the YRE compared to other estuaries, indicating that Hg(II) tends to be more adsorbed on SPM in this system. The adsorption kinetics of Hg(II) on SPM at both estuaries conformed to pseudosecond-order kinetics, while the adsorption isotherms at the XRE and YRE fitted well with the Langmuir model and Freundlich model, respectively, possibly due to the difference in SPM composition and properties. The logKd was significantly positively correlated with the adsorption capacity parameter k
Language	English
Publishing date	2023-06-16
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.164860
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ab Jg. 2022: Lesesaal (EG)

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Article ; Online: Source identification of chromium in the sediments of the Xiaoqing River and Laizhou Bay: A chromium stable isotope perspective.

He, Xiaoqing / Chen, Guojun / Fang, Ziyao / Liang, Wenjian / Li, Boda / Tang, Jianhui / Sun, Yongge / Qin, Liping

Environmental pollution (Barking, Essex : 1987)

2020 Volume 264, Page(s) 114686

Abstract: ... isotopic composition of sediments from the Xiaoqing River, a heavily polluted river located in the Shandong ...

Abstract	Hexavalent chromium, Cr(VI), is a heavy metal contaminant and the reduction of Cr(VI) is accompanied by large isotopic fractionation. In this study, the sources of Cr were explored using the Cr isotopic composition of sediments from the Xiaoqing River, a heavily polluted river located in the Shandong Province of China, which flows into Laizhou Bay. The results show that δ
MeSH term(s)	Bays ; China ; Chromium/analysis ; Environmental Monitoring ; Geologic Sediments ; Isotopes ; Water Pollutants, Chemical/analysis
Chemical Substances	Isotopes ; Water Pollutants, Chemical ; Chromium (0R0008Q3JB)
Language	English
Publishing date	2020-04-29
Publishing country	England
Document type	Journal Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2020.114686
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Zs.A 2599: Show issues

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bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (2.OG)
ab Jg. 2022: Lesesaal (EG)

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Article: [Effects of Pollution Control of Xiaoqing River on Environment Factors and Phytoplankton Community in the Laizhou Bay].

Zhang, Jing-Jing / Wang, Yu-Jue / Li, Fan / Liu, Ke / Wang, Ying / Yu, Yang / Gao, Yan-Jie / Xiao, Xiao-Tong / Lü, Zhen-Bo

Huan jing ke xue= Huanjing kexue

2022 Volume 43, Issue 4, Page(s) 1997–2006

Abstract: ... pollution control) to clarify the effects of the pollution control of the Xiaoqing River, which is a major source ... that the environmental factors changed significantly after pollution control of the Xiaoqing River. The concentrations ...

Abstract	The spatial distribution of environmental factors, chlorophyll a (Chla), phytoplankton abundance, and community structure in the Laizhou Bay were investigated in August 2018 (wet season after pollution control) to clarify the effects of the pollution control of the Xiaoqing River, which is a major source of pollution, on environmental factors and phytoplankton community structure in this area. The results showed that the environmental factors changed significantly after pollution control of the Xiaoqing River. The concentrations of dissolved inorganic nitrogen (DIN), dissolved inorganic silicon (DSi), NO
MeSH term(s)	Bays ; China ; Chlorophyll A/analysis ; Cyanobacteria ; Diatoms ; Environmental Monitoring ; Nitrogen/analysis ; Phytoplankton ; Rivers/chemistry ; Seasons
Chemical Substances	Nitrogen (N762921K75) ; Chlorophyll A (YF5Q9EJC8Y)
Language	Chinese
Publishing date	2022-04-07
Publishing country	China
Document type	Journal Article
ISSN	0250-3301
ISSN	0250-3301
DOI	10.13227/j.hjkx.202108128
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Article ; Online: Assessment of eutrophication from Xiaoqing River estuary to Laizhou Bay: Further warning of ecosystem degradation in typically polluted estuary

Zhang, Feifei / Fu, Hongrui / Lou, Huawei / Sun, Xiaojun / Zhang, Dong / Sun, Peiyan / Wang, Xinping / Li, Yiming / Lu, Jinren / Bao, Mutai

Marine Pollution Bulletin. 2023 Aug., v. 193 p.115209-

2023

Abstract: ... urbanization. High nutrient levels in the Xiaoqing River are believed to be the main cause of Laizhou Bay ... becoming eutrophicated. Therefore, we conducted two cruises from the Xiaoqing River estuary to Laizhou Bay ... the dry season is higher than the wet season. In space, Xiaoqing estuary is higher than Laizhou Bay. In the two ...

Abstract	The coast of Laizhou Bay is plagued by a number of environmental issues, such as eutrophication, which are likely to worsen over the next few decades as a result of trends toward industrialization and urbanization. High nutrient levels in the Xiaoqing River are believed to be the main cause of Laizhou Bay becoming eutrophicated. Therefore, we conducted two cruises from the Xiaoqing River estuary to Laizhou Bay in August 2022 and December 2022, respectively, in the wet and dry periods to assess the potential impact of status of eutrophication due to human activities. The results showed that the concentration of DIN was higher than the quality standard for water (fᵢ > 1) in both the wet season (August 2022) and the dry season (December 2022). DIN has major environmental impacts in Laizhou Bay. The eutrophication level index and organic pollution index have obvious spatial and temporal characteristics. In terms of time, the dry season is higher than the wet season. In space, Xiaoqing estuary is higher than Laizhou Bay. In the two surveys, DIN and DIP concentrations were significantly positively correlated, indicating that N and P pollution in the region had a common source and destination, and the spatial distribution was also similar. In addition, the current environmental conditions in the region are not ideal, reaching moderate and severe eutrophication levels, which proves that the ecosystem has the risk of aggravating degradation. As the Xiaoqing River is about to resume full navigation, human-related nutrient input (especially DIN) will continue to increase, and it is expected that the eutrophication risk in this area will increase in the next few years due to the increase in nutrient load.
Keywords	coasts ; dry season ; ecosystems ; estuaries ; eutrophication ; humans ; industrialization ; marine pollution ; pollution load ; risk ; rivers ; urbanization ; wet season ; Typically polluted estuary ; Xiaoqing River ; Laizhou Bay ; Human activities ; Water eutrophication ; Inorganic nitrogen
Language	English
Dates of publication	2023-08
Publishing place	Elsevier Ltd
Document type	Article ; Online
ZDB-ID	2001296-2
ISSN	1879-3363 ; 0025-326X
ISSN (online)	1879-3363
ISSN	0025-326X
DOI	10.1016/j.marpolbul.2023.115209
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Article ; Online: Adsorption and environmental behavior of mercury on suspended particulate matter from the Yellow River and Xiaoqing River estuaries

Cao, Sijing / Liang, Shengkang / Li, Yanbin

Science of the Total Environment. 2023 Oct., v. 893 p.164860-

2023

Abstract: ... higher than those of dissolved Hg (DHg) at the Xiaoqing River Estuary (XRE) and the Yellow River Estuary ...

Abstract	Estuaries control the amount of Hg transported from rivers to coastal seas. The adsorption of Hg(II) on suspended particulate matter (SPM) is the key process that affects the behavior of Hg in estuaries since most riverine Hg is deposited with SPM in estuaries. In this study, the concentrations of particulate Hg (PHg) were higher than those of dissolved Hg (DHg) at the Xiaoqing River Estuary (XRE) and the Yellow River Estuary (YRE), indicating that SPM plays a crucial role in controlling the fate of Hg in estuaries. A higher partition coefficient (logKd) of Hg was observed at the YRE compared to other estuaries, indicating that Hg(II) tends to be more adsorbed on SPM in this system. The adsorption kinetics of Hg(II) on SPM at both estuaries conformed to pseudosecond-order kinetics, while the adsorption isotherms at the XRE and YRE fitted well with the Langmuir model and Freundlich model, respectively, possibly due to the difference in SPM composition and properties. The logKd was significantly positively correlated with the adsorption capacity parameter kf at the YRE, indicating that the distribution of Hg(II) at the SPM-water interface is controlled by the adsorption of Hg(II) on SPM. The results of environmental parameter correlation analysis and adsorption-desorption experiments showed that SPM and organic matter are the key factors controlling Hg distribution and partitioning at the water-solid interface in estuaries.
Keywords	adsorption ; environmental factors ; estuaries ; mercury ; organic matter ; particulates ; riparian areas ; rivers ; sorption isotherms ; Yellow River ; Estuary ; Desorption ; Suspended particulate matter
Language	English
Dates of publication	2023-10
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.164860
Database	NAL-Catalogue (AGRICOLA)

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Z 74/341: Show issues

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Article ; Online: The Application of the Generalized Additive Model to Represent Macrobenthos near Xiaoqing Estuary, Laizhou Bay

Liu, Lulei / Li, Ang / Zhu, Ling / Xue, Suyan / Li, Jiaqi / Zhang, Changsheng / Yu, Wenhan / Ma, Zhanfei / Zhuang, Haonan / Jiang, Zengjie / Mao, Yuze

Biology (Basel). 2023 Aug. 18, v. 12, no. 8

2023

Abstract: ... of the macrobenthos community and environmental factors near Xiaoqing Estuary, Laizhou Bay. Responses ...

Abstract	Macrobenthos is widely used as an indicator of ecological health in marine monitoring and assessment. The present study aimed to characterize the interrelationships between the distribution of the macrobenthos community and environmental factors near Xiaoqing Estuary, Laizhou Bay. Responses of species richness to environmental factors were studied using the generalized additive model (GAM) and the Margalef diversity index (dM) as indicators of species diversity instead of individual indicator species. Six factors were selected in the optimal model by stepwise regression: sediment factors (organic matter, phosphate, nitrate nitrogen, and ammonium nitrogen) and water factors (salinity, and ammonium nitrogen). The response curves generated by the GAM showed a unimodal relationship among taxa diversity, salinity in water, and sediment organic matter. dM was positively correlated with ammonium nitrogen in water and was negatively correlated with phosphate in the sediment. The model optimized by forward stepwise optimization explained 92.6% of the Margalef diversity index with a small residual (2.67). The model showed good performance, with the measured dM strongly correlated with the predicted dM (Pearson R² = 0.845, p < 0.05). The current study examined the combined influence of multiple eco-factors on macrobenthos, and the Margalef diversity index of macrobenthos was predicted by the GAM model in a salinity-stressed estuary.
Keywords	ammonium nitrogen ; environmental factors ; environmental health ; estuaries ; indicator species ; models ; nitrate nitrogen ; organic matter ; phosphates ; salinity ; sediments ; species richness
Language	English
Dates of publication	2023-0818
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article ; Online
ZDB-ID	2661517-4
ISSN	2079-7737
ISSN	2079-7737
DOI	10.3390/biology12081146
Database	NAL-Catalogue (AGRICOLA)

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Article: Source identification of chromium in the sediments of the Xiaoqing River and Laizhou Bay: A chromium stable isotope perspective

He, Xiaoqing / Chen, Guojun / Fang, Ziyao / Liang, Wenjian / Li, Boda / Tang, Jianhui / Sun, Yongge / Qin, Liping

Environmental pollution. 2020 Sept., v. 264

2020

Abstract: ... isotopic composition of sediments from the Xiaoqing River, a heavily polluted river located in the Shandong ... of the Xiaoqing River and Laizhou Bay, indicating no obvious Cr pollution in these locations. The limited ...

Abstract	Hexavalent chromium, Cr(VI), is a heavy metal contaminant and the reduction of Cr(VI) is accompanied by large isotopic fractionation. In this study, the sources of Cr were explored using the Cr isotopic composition of sediments from the Xiaoqing River, a heavily polluted river located in the Shandong Province of China, which flows into Laizhou Bay. The results show that δ⁵³Cr values of the sediments are the highest upstream near the pollution source, and gradually decrease along the river toward the range for igneous reservoirs observed near the estuary. Based on the calculation of authigenic Cr isotopic composition (δ⁵³Crₐᵤₜₕ) using the detrital index and leaching experiments, we suggest that the authigenic Cr in the sample near the pollution source with the highest δ⁵³Crₐᵤₜₕ value mainly comes from the reduction of Cr(VI) discharged by anthropogenic activity, and authigenic Cr in other samples in the midstream with δ⁵³Crₐᵤₜₕ values slightly higher than the range of igneous reservoirs may come from natural oxidative Cr weathering products. By introducing a Rayleigh model, we calculate that at least 31%–55% of Cr(VI) in the river water had been reduced to Cr(III) near the pollution source. Due to the self-purification ability of the river, Cr(VI) was reduced; thus, there is no record of high δ⁵³Crₐᵤₜₕ values in the downstream of the Xiaoqing River and Laizhou Bay, indicating no obvious Cr pollution in these locations. The limited variation of δ⁵³Cr values for samples from a sediment core in Laizhou Bay is also indicative of no obvious Cr pollution in the history. The Cr isotopic compositions of the river sediments are useful for the identification of Cr sources and can be used to advise environmental remediation on Cr pollution.
Keywords	anthropogenic activities ; chromium ; estuaries ; heavy metals ; isotope fractionation ; models ; pollution ; remediation ; river water ; rivers ; sediments ; stable isotopes ; China
Language	English
Dates of publication	2020-09
Publishing place	Elsevier Ltd
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2020.114686
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 4136: Show issues

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Article: [Analysis of Water Quality Change and Its Driving Factors of the Xiaoqing River Estuary in Recent Ten Rears].

Fan, Xin-Feng / Han, Mei / Wang, Lei / Li, Xiu-Ping / Zhou, Jing

Huan jing ke xue= Huanjing kexue

2020 Volume 41, Issue 4, Page(s) 1619–1628

Abstract: According to the monitoring data of pollutant concentration in the Xiaoqing River estuary from 2008 ... the principal component analysis. The results showed that the water quality of the Xiaoqing River estuary was improved and ...

Abstract	According to the monitoring data of pollutant concentration in the Xiaoqing River estuary from 2008 to 2017, 13 pollutants affecting water quality were selected. The trends of changes in water quality were identified mainly by the pollution index method, and the driving factors affecting water quality changes were quantitatively and qualitatively analyzed by the Spearman and Pearson correlation analysis method and the principal component analysis. The results showed that the water quality of the Xiaoqing River estuary was improved and the pollution was greatly reduced from 2008 to 2017. The pollution factors were still above the limits to varying degrees; COD and petroleum were the most serious pollutants, TP came second, and the remaining pollutants basically met the water quality standards of the Ⅲ. The pollution degree of petroleum, COD, NH
Language	Chinese
Publishing date	2020-07-01
Publishing country	China
Document type	English Abstract ; Journal Article
ISSN	0250-3301
ISSN	0250-3301
DOI	10.13227/j.hjkx.201909074
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