Ecohydrology & Hydrobiology最新文献_第4页

Spatial variability of dissolved organic matter in the water-sediment systems in the Baiyangdian Lake 白洋淀水-沉积物体系中溶解有机质的空间变异特征

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2022.07.004

Jinfeng Liang , Junhong Bai , Ling Zhang , Kegang Zhang , Chen Wang , Zhuoqun Wei , Yaqi Wang , Haizhu Liu

Dissolved organic matter (DOM) is widespread in natural water bodies and plays an essential role in ecological processes of aquatic ecosystems. However, spatial variability of DOM in shallow lakes is still kept unclear. Surface water, overlaying water and sediment samples were collected at 61 sampling sites in the whole Baiyangdian Lake to investigate spatial variability and distribution patterns of organic matter contents in three environmental compartments using geostatistical analysis. Results showed that organic matter (OM) contents in sediments were higher with medium variability, and lower DOM content occurred in surface water, with medium variability in overlying waters and high variability in surface waters. The highest DOM contents in waters and OM in sediments appeared in Zaolinzhung (ZLZ) and Zaozhadian (ZZD), respectively, while a relatively low contents appeared in ZLZ sediments. DOM in surface water and overlying water were negatively correlated with OM in sediments. Semi-variance functions showed that a strong spatial autocorrelation for DOM in waters, while OM in sediments had a medium spatial correlation. The autocorrelation distance of DOM in waters was between 1.16 km and 11.70 km, and OM in sediments was 4.25 km. The findings of this work can contribute to better understanding spatial variability of OM, which would provide a guidance for the sampling optimization of waters and sediments in the Baiyangdian Lake and lake sustainable management.

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引用次数: 0

Heavy metal pollution and ecological risk assessment of surface sediments covered by emerged and submerged plants in a shallow lake 浅水湖泊浮出与淹没植物覆盖表层沉积物重金属污染及生态风险评价

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2022.07.002

Haizhu Liu , Junhong Bai , Kegang Zhang , Chen Wang , Jinfeng Liang , Ling Zhang , Yaqi Wang , Rong Xiao

Surface sediments were collected to investigate the pollution levels and ecological risks of heavy metals (e.g., As, Ni, Pb, Cu, Zn, Cr, Cd, and Mn) in the surface sediments covered by emerged and submerged plants in the main areas of the Baiyangdian Lake. The results showed that Pb and Cd highly exceeded the background values of Hebei Province and had high pollution levels, while other heavy metals exhibited no pollution. With the exception of Mn, there was no significant difference in the concentrations of heavy metals in surface sediments between the emerged-plant and submerged-plant zones. The concentrations of heavy metals in Zaolinzhuang were relatively low, while those in Wangjiazhai, Nanliuzhuang and Shaochedian were relatively high. In the two plant zones, Cd in surface sediments posed a considerable risk at all sampling sites regardless of plant zones, followed by Pb with light pollution level. Correlation analysis and factor analysis results showed that all these heavy metals generally originated from three different sources in both plant zones, of which As, Cu and Zn had two sources in the emerged plant zones. Our findings indicate that Cd and Pb pollution of the Baiyangdian Lake should be given more attention to contribute to the environmental control and ecosystem conservation of the lake.

{"title":"Heavy metal pollution and ecological risk assessment of surface sediments covered by emerged and submerged plants in a shallow lake","authors":"Haizhu Liu , Junhong Bai , Kegang Zhang , Chen Wang , Jinfeng Liang , Ling Zhang , Yaqi Wang , Rong Xiao","doi":"10.1016/j.ecohyd.2022.07.002","DOIUrl":"10.1016/j.ecohyd.2022.07.002","url":null,"abstract":"<div><div>Surface sediments were collected to investigate the pollution levels and ecological risks of heavy metals (e.g., As, Ni, Pb, Cu, Zn, Cr, Cd, and Mn) in the surface sediments covered by emerged and submerged plants in the main areas of the Baiyangdian Lake. The results showed that Pb and Cd highly exceeded the background values of Hebei Province and had high pollution levels, while other heavy metals exhibited no pollution. With the exception of Mn, there was no significant difference in the concentrations of heavy metals in surface sediments between the emerged-plant and submerged-plant zones. The concentrations of heavy metals in Zaolinzhuang were relatively low, while those in Wangjiazhai, Nanliuzhuang and Shaochedian were relatively high. In the two plant zones, Cd in surface sediments posed a considerable risk at all sampling sites regardless of plant zones, followed by Pb with light pollution level. Correlation analysis and factor analysis results showed that all these heavy metals generally originated from three different sources in both plant zones, of which As, Cu and Zn had two sources in the emerged plant zones. Our findings indicate that Cd and Pb pollution of the Baiyangdian Lake should be given more attention to contribute to the environmental control and ecosystem conservation of the lake.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 849-856"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129962803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Typical vegetation dynamics and hydrological changes of Dongting Lake wetland from 1985 to 2020 1985 - 2020年洞庭湖湿地典型植被动态与水文变化

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2023.04.008

Yao Liu , Jingtai Li , Dandan Yan , Li Chen , Min Li , Zhaoqing Luan

Dongting Lake wetland provides important ecosystem functions for water regulation and biodiversity protection. However, the construction of the Three Gorges Dam has seriously affected the wetland hydrology and landscape. Therefore, it is of great significance to study the landscape dynamics of Dongting Lake wetland and its response to hydrological changes. Based on GEE cloud platform, this paper will obtain the long-term landscape dynamic changes of Dongting Lake wetland and analyze the influence of changes of multi-period water conditions on wetland landscape. The results show that, 1) From 1985 to 2020, the typical vegetation area of Dongting Lake wetland changed obviously on the whole lake scale. The evolution of wetland landscape pattern mainly occurred in East Dongting Lake, west of South Dongting Lake and north of West Dongting Lake. 2) According to the M-K method, the water level data of Dongting Lake showed a sudden change in 2003. This led to the decline of the annual water level of Dongting Lake and the decline of the water level during the wet season and retreating season. 3) The main hydrological variables affecting the change of the area of C. brevicuspis(Carex brevicuspis) and P. australis(Phragmites australis) in Dongting Lake wetland are the mean water level and minimum water level in wet season, and the mean water level, the minimum water level and the maximum water level in retreating season. This study can be used as a theoretical foundations to protect and restore the wetlands of Dongting Lake and manage the Three Gorges project.

{"title":"Typical vegetation dynamics and hydrological changes of Dongting Lake wetland from 1985 to 2020","authors":"Yao Liu , Jingtai Li , Dandan Yan , Li Chen , Min Li , Zhaoqing Luan","doi":"10.1016/j.ecohyd.2023.04.008","DOIUrl":"10.1016/j.ecohyd.2023.04.008","url":null,"abstract":"<div><div><span>Dongting Lake wetland provides important ecosystem functions for water regulation and biodiversity protection. However, the construction of the Three Gorges Dam has seriously affected the wetland hydrology and landscape. Therefore, it is of great significance to study the landscape dynamics of Dongting Lake wetland and its response to hydrological changes. Based on GEE cloud platform, this paper will obtain the long-term landscape dynamic changes of Dongting Lake wetland and analyze the influence of changes of multi-period water conditions on wetland landscape. The results show that, 1) From 1985 to 2020, the typical vegetation area of Dongting Lake wetland changed obviously on the whole lake scale. The evolution of wetland landscape pattern mainly occurred in East Dongting Lake, west of South Dongting Lake and north of West Dongting Lake. 2) According to the M-K method, the water level data of Dongting Lake showed a sudden change in 2003. This led to the decline of the annual water level of Dongting Lake and the decline of the water level during the wet season and retreating season. 3) The main hydrological variables affecting the change of the area of </span><em>C. brevicuspis</em>(<em>Carex brevicuspis</em>) and <em>P. australis</em>(<em>Phragmites australis</em>) in Dongting Lake wetland are the mean water level and minimum water level in wet season, and the mean water level, the minimum water level and the maximum water level in retreating season. This study can be used as a theoretical foundations to protect and restore the wetlands of Dongting Lake and manage the Three Gorges project.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 910-919"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134046215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advances and hotspots of phosphorus form analysis of sediments based on different extraction methods using CiteSpace 基于CiteSpace不同提取方法的沉积物中磷形态研究进展与热点分析

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2023.03.003

Ruoxuan Tang , Junhong Bai , Ling Zhang , Yaqi Wang , Haizhu Liu , Jiangbao Xia

Phosphorus (P) forms in sediments can be affected by various environmental factors, and P transformation in the water-sediment interface contributes to the eutrophication of water bodies. Therefore, a series of methods have been proposed to extract P forms in sediments. In order to explore the progress and research hotspots of P form analysis of sediments using different extraction methods, the core collection of Web of Science is taking as data source, and the CiteSpace knowledge map analysis tool is used to carry out visual analysis from the aspects of publication output, country analysis, publishing institution analysis, keyword analysis, literature co-citation analysis, burst terms analysis, and cluster analysis. The literature on the extraction methods for P form analysis of sediments was found to have boomed from 2013 to 2022, with higher contributions from China, France and United States. The cluster analysis of keywords and co-citation clarified the main research frontiers and hotspots. The bioavailability, migration and transformation mechanisms of P forms will become a new hotspot in this field in the future.

{"title":"Advances and hotspots of phosphorus form analysis of sediments based on different extraction methods using CiteSpace","authors":"Ruoxuan Tang , Junhong Bai , Ling Zhang , Yaqi Wang , Haizhu Liu , Jiangbao Xia","doi":"10.1016/j.ecohyd.2023.03.003","DOIUrl":"10.1016/j.ecohyd.2023.03.003","url":null,"abstract":"<div><div>Phosphorus (P) forms in sediments can be affected by various environmental factors, and P transformation in the water-sediment interface contributes to the eutrophication<span> of water bodies. Therefore, a series of methods have been proposed to extract P forms in sediments. In order to explore the progress and research hotspots of P form analysis of sediments using different extraction methods, the core collection of Web of Science is taking as data source, and the CiteSpace knowledge map analysis tool is used to carry out visual analysis from the aspects of publication output, country analysis, publishing institution analysis, keyword analysis, literature co-citation analysis, burst terms analysis, and cluster analysis. The literature on the extraction methods for P form analysis of sediments was found to have boomed from 2013 to 2022, with higher contributions from China, France and United States. The cluster analysis of keywords and co-citation clarified the main research frontiers and hotspots. The bioavailability, migration and transformation mechanisms of P forms will become a new hotspot in this field in the future.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 884-892"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122816531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two centuries of changes - revision of the hydrography of the Biebrza Valley, its transformation and probable ecohydrological challenges 两个世纪的变化——比布尔扎河谷水文学的修订，它的转变和可能的生态水文挑战

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2023.08.008

Marta Stachowicz, Nelson Venegas-Cordero, Pouya Ghezelayagh

Human-induced changes in hydrography have led to serious changes in the hydrological and ecological condition of ecosystems, including habitat fragmentation and reduction of water in the landscape. The aim of this study was to assess the transformation of the hydrographic network in the Biebrza National Park (BbNP) over the XIX-XXI centuries and to analyze its probable ecohydrological challenges. The analysis of changes in the hydrographic network was based on a spatial comparison of hydrographic network elements on the basis of spatial sources. As a result of both natural and human-induced processes, there have been significant changes to elements of the hydrographic network of the BbNP. The length, area and sinuosity of the rivers in the BbNP area have decreased significantly in the XIX-XXI centuries, in contrast to the length of the canals dug in the XIX century - their length increased. On average, river channelization reduced channel water storage capacity by 49%. In other cases the average decrease of storage capacity of the channel was about 14%. As a result of drainage works in the XIX century, the network of drainage ditches was established in the BbNP, which was significantly extended (more than 6 times) in the XXI century. A comprehensive analysis of hydrographic changes, their causes and possible consequences is necessary to understand the dynamics of river networks. It also makes it possible to predict the future ecohydrological response of rivers to anthropogenic influences and climate change, thus helping to establish appropriate management and ecohydrological restoration of aquatic ecosystems.

{"title":"Two centuries of changes - revision of the hydrography of the Biebrza Valley, its transformation and probable ecohydrological challenges","authors":"Marta Stachowicz, Nelson Venegas-Cordero, Pouya Ghezelayagh","doi":"10.1016/j.ecohyd.2023.08.008","DOIUrl":"10.1016/j.ecohyd.2023.08.008","url":null,"abstract":"<div><div><span>Human-induced changes in hydrography have led to serious changes in the hydrological and ecological condition of ecosystems, including habitat fragmentation and reduction of water in the landscape. The aim of this study was to assess the transformation of the hydrographic network in the Biebrza National Park (BbNP) over the XIX-XXI centuries and to analyze its probable ecohydrological challenges. The analysis of changes in the hydrographic network was based on a spatial comparison of hydrographic network elements on the basis of spatial sources. As a result of both natural and human-induced processes, there have been significant changes to elements of the hydrographic network of the BbNP. The length, area and sinuosity of the rivers in the BbNP area have decreased significantly in the XIX-XXI centuries, in contrast to the length of the canals dug in the XIX century - their length increased. On average, river channelization reduced channel water storage capacity by 49%. In other cases the average decrease of storage capacity of the channel was about 14%. As a result of drainage works in the XIX century, the network of drainage ditches was established in the BbNP, which was significantly extended (more than 6 times) in the XXI century. A comprehensive analysis of hydrographic changes, their causes and possible consequences is necessary to understand the dynamics of river networks. It also makes it possible to predict the future ecohydrological response of rivers to anthropogenic influences and climate change, thus helping to establish appropriate management and ecohydrological restoration of </span>aquatic ecosystems.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 738-748"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125415816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An eco-hydrological model for modelling hydrological processes in a riparian wetland with the unclosed boundary 非封闭边界河岸湿地水文过程模拟的生态水文模型

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2022.03.001

Xiaoxiao Ju , Cun Du , Fan Feng , Demin Zhou , Xiangzheng Deng

It has always been one of the key problems of wetland science to explore the ecological-hydrological interaction mechanism of plants in floodplain wetland. However, the current traditional hydrological model cannot reveal effectively and quantitatively the hydrological process from the spatiotemporal method due to the complex multi-interface features of wetland. In this paper, we constructed innovatively a distributed model for Modelling of the Eco-hydrological process between the Interaction of Surface water & Soil water in Wetlands environment (MEISSW) on the unclosed boundary of Honghe National Nature Reserve (HNNR) in Sanjiang Plain, Northeast China. It is the first effort globally to establish the MEISSW model on the aim at simulating the spatiotemporal transformation characteristics of surface water and soil water in a riparian wetland. Four rainfall events with different hydrological and meteorological characteristics were used to calibrate parameters, and the other three rainfall events were used for verification. Results showed the model was generally credible and highly correlated with the Pearson correlation coefficient (PEARSON) as its 0.76 simulation result on the soil water and 0.64 as the NASH coefficient on the surface water. This model is not only helpful to understand the characteristics of the process interaction between plant ecology and water in the interaction zone, but also useful to quantify and predict the change of ecological base flow within the wetland habitats caused by the human disturbance, and its impact on the spatial pattern of the wetland plant community.

{"title":"An eco-hydrological model for modelling hydrological processes in a riparian wetland with the unclosed boundary","authors":"Xiaoxiao Ju , Cun Du , Fan Feng , Demin Zhou , Xiangzheng Deng","doi":"10.1016/j.ecohyd.2022.03.001","DOIUrl":"10.1016/j.ecohyd.2022.03.001","url":null,"abstract":"<div><div><span>It has always been one of the key problems of wetland science to explore the ecological-hydrological interaction mechanism of plants in floodplain wetland. However, the current traditional hydrological model cannot reveal effectively and quantitatively the hydrological process from the spatiotemporal method due to the complex multi-interface features of wetland. In this paper, we constructed innovatively a distributed model for Modelling of the Eco-hydrological process between the Interaction of Surface water & Soil water in Wetlands environment (MEISSW) on the unclosed boundary of Honghe National Nature Reserve (HNNR) in Sanjiang Plain, Northeast China. It is the first effort globally to establish the MEISSW model on the aim at simulating the spatiotemporal transformation characteristics of surface water and soil water in a riparian wetland. Four rainfall events with different hydrological and meteorological characteristics were used to calibrate parameters, and the other three rainfall events were used for verification. Results showed the model was generally credible and highly correlated with the Pearson correlation coefficient (PEARSON) as its 0.76 simulation result on the soil water and 0.64 as the NASH coefficient on the surface water. This model is not only helpful to understand the characteristics of the process interaction between </span>plant ecology and water in the interaction zone, but also useful to quantify and predict the change of ecological base flow within the wetland habitats caused by the human disturbance, and its impact on the spatial pattern of the wetland plant community.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 839-848"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132407855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of bacterial community structure and diversity in overlying water and sediments with Lotus in the Baiyangdian Lake, China 白洋淀荷花覆盖水体及沉积物细菌群落结构及多样性特征

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2023.03.004

Ling Zhang , Junhong Bai , Kegang Zhang , Zhuoqun Wei , Yaqi Wang , Haizhu Liu , Rong Xiao , Milko A. Jorquera

Bacterial communities in water and sediments are important decomposers of lake ecosystem. However, the differences in bacterial community structure and biodiversity in overlying water and sediments covered by aquatic plants such as Lotus in lake ecosystems are still poorly understood. Here we collected paired overlying water and sediments in the Baiyangdian (BYD) Lake to explore their characteristics of bacterial community. Our results showed that bacterial diversity indices such as Sobs, Shannon, Simpsoneven and Phylogenetic diversity in sediment samples were significantly higher than those in overlying water samples, which were mainly affected by ofloxacin (OFL), dissolved oxygen and pH in the overlying water, while norfloxacin (NOR), OFL and sulfapyridine (SPD) in sediments. Dominant phyla across all overlying water samples were Actinobacteriota (36.65%), Proteobacteria (29.12%) and Patescibacteria (17.01%), while Proteobacteria (20.97%), Chloroflexi (19.56%) and Actinobacteriota (13.37%) in all sediment samples. Source Tracker results showed that about 6.59 ± 1.9% of the variations in bacterial community in sediments could be attributed to the contribution of the overlying water bacterial community, which is higher than that of sediments to the overlying water bacterial community. The dominant factors shaping the bacterial communities in the overlying water were NOR, dissolved organic carbon (DOC) and total phosphorus, while in sediments were NOR, OFL and DOC. It is suggested that antibiotics (especially NOR) may have a substantial effect on bacterial community rather than interaction of environmental compartments (overlying water and sediments), and would help to improve the understanding of bacteria transfer and coalescence in a shallow lake ecosystem.

{"title":"Characteristics of bacterial community structure and diversity in overlying water and sediments with Lotus in the Baiyangdian Lake, China","authors":"Ling Zhang , Junhong Bai , Kegang Zhang , Zhuoqun Wei , Yaqi Wang , Haizhu Liu , Rong Xiao , Milko A. Jorquera","doi":"10.1016/j.ecohyd.2023.03.004","DOIUrl":"10.1016/j.ecohyd.2023.03.004","url":null,"abstract":"<div><div><span>Bacterial communities<span><span> in water and sediments are important decomposers of lake ecosystem<span>. However, the differences in bacterial community structure and biodiversity in overlying water and sediments covered by aquatic plants such as Lotus in lake ecosystems are still poorly understood. Here we collected paired overlying water and sediments in the Baiyangdian (BYD) Lake to explore their characteristics of bacterial community. Our results showed that bacterial diversity indices such as Sobs, Shannon, Simpsoneven and </span></span>Phylogenetic<span> diversity in sediment samples were significantly higher than those in overlying water samples, which were mainly affected by ofloxacin<span><span> (OFL), dissolved oxygen and pH in the overlying water, while norfloxacin (NOR), OFL and </span>sulfapyridine (SPD) in sediments. Dominant phyla across all overlying water samples were Actinobacteriota (36.65%)</span></span></span></span><em>,</em> Proteobacteria (29.12%) and Patescibacteria (17.01%), while Proteobacteria (20.97%)<em>,</em><span><span> Chloroflexi (19.56%) and Actinobacteriota (13.37%) in all sediment samples. Source Tracker results showed that about 6.59 ± 1.9% of the variations in bacterial community in sediments could be attributed to the contribution of the overlying water bacterial community, which is higher than that of sediments to the overlying water bacterial community. The dominant factors shaping the bacterial communities in the overlying water were NOR, </span>dissolved organic carbon (DOC) and total phosphorus, while in sediments were NOR, OFL and DOC. It is suggested that antibiotics (especially NOR) may have a substantial effect on bacterial community rather than interaction of environmental compartments (overlying water and sediments), and would help to improve the understanding of bacteria transfer and coalescence in a shallow lake ecosystem.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 893-900"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120980881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Status of river-connected lakes under the influence of the Three Gorges Dam: research progress and prospect 三峡大坝影响下的连河湖泊现状:研究进展与展望

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2023.08.012

Jingtai Li , Li Chen , Cuiling Wu , Min Li , Dandan Yan , Siying Xie , Zhaoqing Luan

The construction and operation of the Three Gorges Dam, the world's largest dam, has provided important support for national economic development and drinking water safety. However, the dam's construction has had a non-negligible impact on the ecosystem condition of lake wetlands in the middle and lower reaches of the Yangtze River, which has become a significant theme in recent scientific researches and policy works. Although previous studies have carried out detailed assessments of the relationship between the Three Gorges Dam and downstream lake wetland ecosystems, there has not been a comprehensive discussion. Based on the bibliometric method and the systematic collation of related research, this paper comprehensively reviewed the research progress and hot topics of the river-connected lakes in the middle and lower reaches of the Yangtze River under the influence of the Three Gorges Project. The results show that the number of related studies continued to grow during the study period, involving multiple research fields. The research hotspots focused on five fields: schistosomiasis, remote sensing monitoring of the landscape, water quality, water level and sediment. The disturbance of the Three Gorges Dam on lake water level, landscape heterogeneity and habitat quality may be the focus of further research. In addition, this study presents challenges and recommendations for future research directions. This paper aims to provide a constructive reference for the management of the Three Gorges Dam and the conservation and restoration of lake wetland ecosystems.

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引用次数: 0

Spatiotemporal responses of ecosystem service values to land use/cover changes in the Baiyangdian region, China 中国白洋淀地区生态系统服务价值对土地利用/覆盖变化的时空响应

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2023.12.007

Lixiang Wen, Junhong Bai, Yaqi Wang, Yanan Guan, Liehui Zhi, Ruoxuan Tang

Intense human activities have altered the land use/land cover (LULC) patterns of lake basins, posing a major challenge to ecosystem sustainability. However, the impacts of land use/cover changes (LUCCs) on ecosystem service value (ESV) of lake basins remain unclear. Here, we investigated ESV of the Baiyangdian (BYD) region from 1980 to 2020 based on value equivalent method, assessed spatial differences of ESVs using hot/cold-spot mapping method, and explored the impact of LUCCs on ESVs in combination with elasticity coefficients. The results showed that (1) the study area was dominated by marsh (50.53 %), water bodies (21.84 %) and cropland (20.28 %) in 2020. Marsh, forestland and grassland significantly decreased from 1980 to 2010, and cropland rapidly rose reaching a peak. Marsh, grassland and water bodies increased during 2010–2020, while cropland decreased. (2) Total ESV was 3469.14 million yuan in 2020, a decrease of 5.77 % compared to 1980 (3681.41 million yuan), mainly due to the decrease in marsh area. (3) ESV hot spots were mainly distributed in the middle part of the region, consistent with water bodies, and ESV cold spots were mainly distributed on the edges of the region, consistent with cropland. The spatial distribution of ESVs varied widely, with an increasing trend. (4) The elasticity coefficients of ESVs to LULC were all greater than 1, indicating that ESVs responded significantly to LUCCs. Overall, there was a strong temporal and spatial correlation between LULC and ESV. This study will provide valuable references for optimizing land use policies and ecological restoration plans and promoting the improvement of ESVs in shallow lakes.

激烈的人类活动改变了湖泊流域的土地利用/土地覆被模式（LULC），对生态系统的可持续性构成了重大挑战。然而，土地利用/土地覆被变化（LUCCs）对湖泊流域生态系统服务价值（ESV）的影响仍不清楚。在此，我们基于价值当量法研究了白洋淀地区1980-2020年的生态系统服务价值，利用热点/冷点绘图法评估了生态系统服务价值的空间差异，并结合弹性系数探讨了土地利用/覆盖变化对生态系统服务价值的影响。结果表明：(1) 2020 年，研究区主要为沼泽（50.53%）、水体（21.84%）和耕地（20.28%）。从 1980 年到 2010 年，沼泽、林地和草地明显减少，耕地迅速增加并达到高峰。2010-2020 年间，沼泽、草地和水体增加，而耕地减少。(2）2020 年 ESV 总量为 346 914 万元，与 1980 年（36 8141 万元）相比下降了 5.77%，主要原因是沼泽面积减少。(3）ESV 热点主要分布在区域中部，与水体一致；ESV 冷点主要分布在区域边缘，与耕地一致。ESV 的空间分布差异较大，并呈上升趋势。(4) ESV 对 LULC 的弹性系数均大于 1，表明 ESV 对 LUCC 有显著的响应。总体而言，土地利用、土地利用变化和 ESV 之间存在很强的时空相关性。本研究将为优化土地利用政策和生态修复规划、促进浅水湖泊ESV的改善提供有价值的参考。

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引用次数: 0

Assessing the influence of the ecological restoration project on the submerged aquatic vegetation in the Baiyangdian Lake, northern China 白洋淀生态修复工程对沉水植被的影响评价

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2024-12-01 DOI: 10.1016/j.ecohyd.2022.12.006

Yanan Liang , Zhaoning Gong , Yuxin Zhao , Yan Yang

Submerged aquatic vegetation (SAV) is a key indicator for the restoration of wetland water environments and aquatic ecosystems. In this paper, SAV life history information was used to identify and analyze the spatial distribution of dominant SAV species in Baiyangdian Lake from 2017 to 2021 with Sentinel-2 image data, during the implementation of an ecological restoration project. The results show that: (1) The SWIR1_NIR index can achieve significantly accurate identification of SAV, with an accuracy of more than 88%. Combining life history features enabled researchers to distinguish the dominant SAV species with a classification accuracy of 68.75% and Kappa coefficient of 0.64. (2) The ecological restoration project did not significantly affect the spatial distribution of SAV; the SAV was still distributed in the northern, northwestern, southwestern, and shallow coastal areas of the lake. (3) Annually, dominant SAV species area in Baiyangdian Lake varied with the season. (4) Inter-annually, the overall distribution area of SAV in Baiyangdian Lake initially decreased and then increased. The results of this study are useful for the dredging and pollution control project of Baiyangdian Lake, and provide a scientific basis for the subsequent comprehensive treatment of SAV in the lake through multiple measures.

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引用次数: 0