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Tammeorg O, Nürnberg GK, Tõnno I, Toom L, Nõges P. Spatio-temporal variations in sediment phosphorus dynamics in a large shallow lake: Mechanisms and impacts of redox-related internal phosphorus loading. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 907:168044. [PMID: 37898204 DOI: 10.1016/j.scitotenv.2023.168044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/15/2023] [Accepted: 10/20/2023] [Indexed: 10/30/2023]
Abstract
The role of redox-related sediment phosphorus (P) release in shallow polymictic lakes remains poorly understood. Our previous studies in large and shallow Lake Peipsi suggested the importance of the redox-related P release in internal P loading. In the current study, we explored the validity of this hypothesis by also considering organic sediment P (Org-P). We analysed spatio-temporal changes in diffusive P flux and sediment P forms determined by P fractionation and nuclear magnetic resonance (NMR) spectroscopy in summer 2021. Using 1997-2021 data, we computed internal P load (IL) by two methods and studied their relationships with several water quality variables. Anoxia of sediment surfaces and P release progressed with an increase in water temperature during summer. In the long-term, IL estimates by two methods were similar (mean values: 315 and 346 mg/m2/year) and correlated with the predicted anoxia of sediment surfaces (AApred). A contribution of sediment iron-bound P (Fe-P) to P release was indicated by the positive correlation of Fe-P with orthophosphate (NMR) in the short-term studies. No similar evidence was found for Org-P, which contradicts the common tendency to attribute internal P loads largely to Org-P in eutrophic lakes. Nevertheless, organic matter seemed to support reductive dissolution, because seasonal changes in sediment Org-P correlated with those in Fe-P, and organic matter content and diffusive P flux were negatively correlated over different sites. Complex bottom morphology and hydrology affected spatial distribution of the sediment P forms and masked the relationships between sediment P variables and P release. Finally, the importance of redox-related release was reflected in significant relationships between AApred and associated IL with Secchi depth transparency, chlorophyll a concentration, and the biomass of phytoplankton and cyanobacteria. To our knowledge, this is the first time when such direct evidence was provided for a large polymictic lake.
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Affiliation(s)
- Olga Tammeorg
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65 (Viikinkaari 1), FI-00014 Helsinki, Finland; Chair of Hydrobiology and Fishery, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia.
| | | | - Ilmar Tõnno
- Chair of Hydrobiology and Fishery, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
| | - Lauri Toom
- University of Tartu, Faculty of Science and Technology, Estonia
| | - Peeter Nõges
- Chair of Hydrobiology and Fishery, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
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2
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Ma SN, Xu YF, Wang HJ, Wang HZ, Li Y, Dong XM, Xu JL, Yu Q, Søndergaard M, Jeppesen E. Mechanisms of high ammonium loading promoted phosphorus release from shallow lake sediments: A five-year large-scale experiment. WATER RESEARCH 2023; 245:120580. [PMID: 37708778 DOI: 10.1016/j.watres.2023.120580] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 08/25/2023] [Accepted: 09/04/2023] [Indexed: 09/16/2023]
Abstract
The unprecedented global increase in the anthropogenic-derived nitrogen (N) input may have profound effects on phosphorus (P) dynamics and may potentially lead to enhanced eutrophication as demonstrated in short-term mesocosm experiments. However, the role of N-influenced P release is less well studied in large-scale ecosystems. To gain more insight into ecosystem effects, we conducted a five-year large-scale experiment in ten ponds (700-1000 m2 each) with two types of sediments and five targeted total N concentrations (TN) by adding NH4Cl fertilizer (0.5, 1, 5, 10, and 25 mg N L-1). The results showed that: (ⅰ) The sediment P release increased significantly when TN exceeded 10-25 mg N L-1. (ⅱ) The most pronounced sediment P release increase occurred in summer and from sediments rich in organic matter (OMSed). (ⅲ) TN, algal biomass, fish biomass, non-algal turbidity, sediment pH, and OMSed were the dominant factors explaining the sediment P release, as suggested by piecewise structural equation modeling. We propose several mechanisms that may have stimulated P release, i.e. high ammonium input causes a stoichiometric N:P imbalance and induce alkaline phosphatase production and dissolved P uptake by phytoplankton, leading to enhanced inorganic P diffusion gradient between sediment and water; higher pelagic fish production induced by the higher phytoplankton production may have led increased sediment P resuspension through disturbance; low oxygen level in the upper sediment caused by nitrification and organic decomposition of the settled phytoplankton and, finally, long-term N application-induced sediment acidification as a net effect of ammonium hydrolysis, nitrification, denitrification; The mechanisms revealed by this study shed new light on the complex processes underlying the N-stimulated sediment P release, with implications also for the strategies used for restoring eutrophicated lakes.
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Affiliation(s)
- Shuo-Nan Ma
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; School of Marine Sciences, Ningbo University, Ningbo 315832, PR China
| | - Yuan-Feng Xu
- School of Marine Sciences, Ningbo University, Ningbo 315832, PR China
| | - Hai-Jun Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, PR China.
| | - Hong-Zhu Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China.
| | - Yan Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
| | - Xu-Meng Dong
- School of Marine Sciences, Ningbo University, Ningbo 315832, PR China
| | - Ji-Lin Xu
- School of Marine Sciences, Ningbo University, Ningbo 315832, PR China
| | - Qing Yu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
| | - Martin Søndergaard
- Department of Ecoscience and WATEC, Aarhus University, Aarhus 8000, Denmark; Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, Beijing 100190, China
| | - Erik Jeppesen
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, PR China; Department of Ecoscience and WATEC, Aarhus University, Aarhus 8000, Denmark; Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, Beijing 100190, China; Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and implementation, Middle East Technical University, Ankara 06800, Turkey; Institute of Marine Sciences, Middle East Technical University, Erdemli-Mersin 33731, Turkey
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3
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Allen DJ, Farrell M, Huang J, Plush S, Mosley LM. Artificial aeration of an overloaded constructed wetland improves hypoxia but does not ameliorate high nitrogen loads. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 326:116625. [PMID: 36356541 DOI: 10.1016/j.jenvman.2022.116625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 10/04/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
High organic loadings to constructed wetlands can result in water quality issues such as low dissolved oxygen and high ammonium concentrations, with artificial aeration a potential mitigation option. This study compared baseline (no aeration - NA), continuous aeration (CA), and intermittent aeration (IA) conditions to improve water quality in a tertiary treatment free water surface constructed wetland (FWS CW) with night time hypoxia/anoxia, and high nutrient concentrations. The response variables included dissolved oxygen (DO), total nitrogen (TN), ammonium nitrogen (NH4+-N), nitrate nitrogen (NO3--N), total phosphorus (TP), phosphate (PO43--P), and dissolved organic carbon (DOC). In situ aeration and monitoring was performed from April to June 2021 in a large, field-scale FWS CW, the Laratinga wetlands Mount Barker, South Australia. The results demonstrated that DO increased by an average 2.11 mg L-1 from NA to CA during the night and 1.26 mg L-1 and 1.84 mg L-1 from NA to IA during the night and day respectively when averaging over the basins. The C/N ratio was very low and there was no significant influence of DO on DOC concentrations. There was no significant difference in TN concentrations with the application of aeration aside from a decrease in the channel at night from NA to IA, and an increase in NH4+-N resulted under IA compared with NA in Basin 1 and 2 during the day. This implies that the N loadings exceeded the wetland's ability to complete nutrient conversions at a rate that aligns with input rate. The concentrations of NO3--N increased at night under CA and IA treatments suggesting that some nitrification was promoted, or there was inhibition of dissimilatory nitrate reduction to ammonium. The concentrations of TP and PO43--P significantly increased with the aeration compared with no aeration, however there was no difference between the aeration treatments. This suggested that increased sediment resuspension during aeration increased P in the water. There was no change in DOC with the application of aeration. Overall, the DO increased with aeration application and may be able to better support the wetland ecology; however, the Laratinga wetland is overloaded and the capacity of the wetland to effectively transform and remove nutrients is inhibited, even with the application of artificial aeration.
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Affiliation(s)
- Danielle J Allen
- School of Biological Sciences, University of Adelaide, Kaurna Country, Urrbrae, South Australia 5064, Australia; CSIRO Agriculture & Food, Kaurna Country, Gate 4 Waite Road, Urrbrae, South Australia 5064, Australia
| | - Mark Farrell
- CSIRO Agriculture & Food, Kaurna Country, Gate 4 Waite Road, Urrbrae, South Australia 5064, Australia
| | - Jianyin Huang
- Scarce Resources and Circular Economy (ScaRCE) University of South Australia, Mawson Lakes Blvd, Kaurna Country, Mawson Lakes, South Australia 5095, Australia
| | - Simon Plush
- Mount Barker District Council, 6 Dutton Road, Peramangk Country, Mount Barker, South Australia 5251, Australia
| | - Luke M Mosley
- School of Biological Sciences, University of Adelaide, Kaurna Country, Urrbrae, South Australia 5064, Australia; School of Agriculture Food and Wine, University of Adelaide, Kaurna Country, Urrbrae, South Australia 5064, Australia.
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Assessing the role of internal phosphorus recycling on eutrophication in four lakes in China and Malaysia. ECOL INFORM 2022. [DOI: 10.1016/j.ecoinf.2022.101830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tammeorg O, Nürnberg GK, Nõges P, Niemistö J. The role of humic substances in sediment phosphorus release in northern lakes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 833:155257. [PMID: 35427610 DOI: 10.1016/j.scitotenv.2022.155257] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 04/05/2022] [Accepted: 04/09/2022] [Indexed: 06/14/2023]
Abstract
In northern lakes, which are often stained and productive, the impacts of dissolved organic carbon (DOC) on sediment phosphorus (P) release are largely unexplored. Here we elucidated the factors behind experimentally-derived sediment release rates of P by diffusion (DF) in four Finnish lakes with a range of colour. Next, we extended our analysis to a larger set of northern lakes for further insights regarding possible implications of organic substances on sediment P release. The significant correlation between pore-water soluble reactive P and dissolved iron, and a positive effect of iron-bound sedimentary P (Fe-P) on DF supports the classic paradigm of redox-dependent P release in the four Finnish lakes studied. Nevertheless, the P release from Fe-P may be inhibited by humic substances, as we observed lower Fe-P and negative DF in two humic rich lakes (high DOC). The analysis of a larger set of northern lakes supported the negative effect of humic substances on P release rate (RR) determined by in situ P increases. In this dataset, DOC correlated positively with water colour and negatively with RR. Furthermore, multiple stepwise regression analysis selected sediment total P and organic matter content in sediments (LOI) as the best predictors of RR, similar to a previously published model by Nürnberg (1988). While the model predictions (RRpred) were correlated to RR in the present study, they tended to overestimate RR that was determined in closed experimental systems. The inhibiting effects of humic substances on RR may be manifested in both internal P loading and primary production.
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Affiliation(s)
- Olga Tammeorg
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65, (Viikinkaari 1), FI-00014 Helsinki, Finland; Chair of Hydrobiology and Fishery, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia.
| | | | - Peeter Nõges
- Chair of Hydrobiology and Fishery, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
| | - Juha Niemistö
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65, (Viikinkaari 1), FI-00014 Helsinki, Finland; AFRY Finland Oy, Environment & Land Use Planning, P.O. Box 50, FI-01621 Vantaa, Finland
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6
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Tammeorg O, Tuvikene L, Kondratyev S, Golosov S, Zverev I, Zadonskaya O, Nõges P. Opportunities for combining data of Estonian and Russian monitoring to reflect on water quality in large transboundary Lake Peipsi. JOURNAL OF GREAT LAKES RESEARCH 2022; 48:961-970. [PMID: 35958273 PMCID: PMC9353880 DOI: 10.1016/j.jglr.2022.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 05/14/2022] [Indexed: 06/15/2023]
Abstract
Lake Peipsi, one of the world's largest lakes, is shared between Estonia and Russia. The water quality in different parts of the lake has so far been assessed independently. Here we explore opportunities for combining data of Estonian and Russian monitoring. For that, we 1) analysed the compatibility of data for some water quality variables; 2) estimated the potential effects of the differences in sampling frequency; 3) provided a few regression models to calculate the missing data for months not sampled by the Russian side. Data of the concurrent Estonian and Russian sampling indicated a good compatibility. Estonian data analysis suggested that water quality assessment results are sensitive to sampling frequency. For example, total phosphorus (TP) in the largest basin showed a long-term decreasing trend in three month data that disappeared when data for other months were added. Disregarding some months may lead to under- or overestimation of certain factors with no consistency in the response of different basins. Hence, data of the whole ice-free period are recommended for an adequate water quality assessment. Furthermore, we demonstrated that monthly values of the water quality variables of the same year are autocorrelated. Based on this, we filled the gaps in the long-term data and compiled a dataset for the whole lake that enables its most comprehensive use in water quality assessment and management. Long-term data revealed no water quality improvement of Lake Peipsi. Further reduction of the external nutrient load is needed. Eutrophication is sustained by high internal phosphorus load.
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Affiliation(s)
- Olga Tammeorg
- Chair of Hydrobiology and Fisheries, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Viikinkaari 1, 00014 Helsinki, Finland
| | - Lea Tuvikene
- Chair of Hydrobiology and Fisheries, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
| | - Sergey Kondratyev
- Institute of Limnology, Russian Academy of Sciences, ul. Sevast’yanova 9, St. Petersburg 199105, Russia
| | - Sergey Golosov
- Institute of Limnology, Russian Academy of Sciences, ul. Sevast’yanova 9, St. Petersburg 199105, Russia
| | - Ilya Zverev
- Institute of Limnology, Russian Academy of Sciences, ul. Sevast’yanova 9, St. Petersburg 199105, Russia
| | - Olga Zadonskaya
- State Hydrological Institute, 23, 2-ia liniia V.O., St. Petersburg 199053, Russia
| | - Peeter Nõges
- Chair of Hydrobiology and Fisheries, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
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7
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Albright EA, Wilkinson GM. Sediment phosphorus composition controls hot spots and hot moments of internal loading in a temperate reservoir. Ecosphere 2022. [DOI: 10.1002/ecs2.4201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Ellen A. Albright
- Department of Ecology, Evolution and Organismal Biology Iowa State University Ames Iowa USA
- Center for Limnology University of Wisconsin‐Madison Madison Wisconsin USA
| | - Grace M. Wilkinson
- Department of Ecology, Evolution and Organismal Biology Iowa State University Ames Iowa USA
- Center for Limnology University of Wisconsin‐Madison Madison Wisconsin USA
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8
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Tammeorg O, Nürnberg GK, Tõnno I, Kisand A, Tuvikene L, Nõges T, Nõges P. Sediment phosphorus mobility in Võrtsjärv, a large shallow lake: Insights from phosphorus sorption experiments and long-term monitoring. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 829:154572. [PMID: 35306066 DOI: 10.1016/j.scitotenv.2022.154572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 03/06/2022] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
Sediment phosphorus (P) recycling is one of the key issues in lake water quality management. We studied sediment P mobility in Võrtsjärv, a large shallow lake in Estonia using both sorption experiments and long-term (1985-2020) monitoring data of the lake. Over the years studied, the lake has undergone a decline in external phosphorus loading (EL), while no improvement in phytoplankton indicators was observed. The results of the sorption experiments revealed that it may be successfully used as a tool to determine P forms involved in P retention, as up to 100% of the P from the water column was detected in sediments. Incubation of wet sediment is preferred to dry because of the sensitivity of organic P to desiccation. In the sediments of Võrtsjärv, the labile P (Lab-P) and iron bound (Fe-P) fractions are the major forms of the mobile pool that supply internal P load as sediment released P. The internal P load calculated from summer total P (TP) increases (ILin situ) in the water column was on average 42%, but could reach 240% of EL at extreme environmental conditions. ILin situ was correlated with the active area, which resembles the area involved in redox-related P release in polymictic lakes, and with the mean bottom shear stress in summer. ILin situ showed a similar decreasing pattern as the external P load over the years 1985-2020, and was likely driven by the decrease of the pool of releasable P. Similarly, the decreases in sediment loading by P retention in our P sorption experiment were associated with decreases in the concentration of the potentially mobile P forms (mainly Lab-P and Fe-P). These results show that changes in external P loading can successfully control internal P loading and are useful in water quality management of large lakes.
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Affiliation(s)
- Olga Tammeorg
- Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia; Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65, Viikinkaari 1, FI-00014 Helsinki, Finland.
| | | | - Ilmar Tõnno
- Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
| | - Anu Kisand
- Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
| | - Lea Tuvikene
- Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
| | - Tiina Nõges
- Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
| | - Peeter Nõges
- Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
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9
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A Rahman ARA, Sinang SC, Nayan N. Response of algal biomass and macrophyte communities to internal or external nutrient loading. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:491. [PMID: 35678919 DOI: 10.1007/s10661-022-10116-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 05/15/2022] [Indexed: 06/15/2023]
Abstract
Nutrient input from internal and external sources could regulate the variability and abundance of algal and macrophytes in freshwater lakes. This study explores the response of algal and macrophyte growth in relation to internal and external nutrient loading. This study was conducted over a 12-month period in a eutrophic shallow urban lake known as Slim River Lake, which located in Perak state, Malaysia. The internal nutrient loading was calculated during five identified dry periods. Meanwhile, external nutrient loading was measured from stormwater runoff after storm events. Algal biomass was measured twice a month, while total macrophyte abundance was measured once in a month. In this lake, internal nutrient loading could contribute up to 7538.33 kg total phosphorus and 42.23 kg total nitrogen during dry periods. Meanwhile, external nutrient loading quantified from the stormwater runoff contributed up to 401,500 kg total phosphorus and 4611.67 kg total nitrogen. The highest monthly mean for algal biomass and total macrophyte abundance was recorded as 60,343.75 cells/mL and 821.50, respectively. Based on the Pearson correlation analysis, algal biomass was significantly correlated with the internal total phosphorus loading (r = 0.54, p < 0.05). In addition, algal biomass also shows an inverse relationship with the external total phosphorus loading (r = - 0.44, p < 0.05). In contrast, total macrophyte abundance was significantly correlated with the external total phosphorus loading (r = 0.50, p < 0.05) and external total nitrogen loading (r = 0.44, p < 0.05). These results suggest that variation of nutrient sources triggers a different response by algal and macrophytes in the study lake. In implications, these findings show that a combination approach in reducing nutrients from sediment and anthropogenic sources is required for potential lake restoration.
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Affiliation(s)
- Amy Rose Aeriyanie A Rahman
- Biology Department, Faculty of Science and Mathematics, Sultan Idris Education University, 35900 Tanjong Malim, Perak, Malaysia
| | - Som Cit Sinang
- Biology Department, Faculty of Science and Mathematics, Sultan Idris Education University, 35900 Tanjong Malim, Perak, Malaysia.
| | - Nasir Nayan
- Geography Department, Faculty of Human Sciences, Sultan Idris Education University, 35900 Tanjong Malim, Perak, Malaysia
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10
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Funaki H, Tsuji H, Nakanishi T, Yoshimura K, Sakuma K, Hayashi S. Remobilisation of radiocaesium from bottom sediments to water column in reservoirs in Fukushima, Japan. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 812:152534. [PMID: 34954177 DOI: 10.1016/j.scitotenv.2021.152534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 11/17/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Reservoir sediments generally act as a sink for radionuclides derived from nuclear accidents, but under anaerobic conditions, several radionuclides remobilise in bioavailable form from sediments to water columns, which may contribute to the long-term contamination of aquatic products. This study systematically investigated the 137Cs activities of sediment-pore water, providing a direct evidence of the remobilisation of bioavailable 137Cs from sediments in two highly contaminated reservoirs affected by the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident. We observed that the dissolved 137Cs activity concentration of pore water (3.0-65.8 Bq L-1) was one to two orders of magnitude higher than that of reservoir water. Moreover, the distribution coefficient (Kd) values for the 137Cs of sediment-pore water (2.6-14 × 103 L kg-1) decreased with depth. The Kd values were significantly and negatively correlated with the concentration of the major 137Cs competing cation NH4+. Our results strongly indicate a competitive ion exchange process between 137Cs and NH4+ via a highly selective interaction with the frayed edge sites of phyllosilicate minerals, which is the major reason for the variability of Kd values of sediment-pore water, even in the Fukushima case. Additionally, the sediment accumulation rates were relatively high, and the annual depositional rate of exchangeable 137Cs prevailed over the annual diffusive flux of 137Cs from the sediment to the overlying water. This finding indicates that even after 10 years since the FDNPP accident, the bioavailable 137Cs is still continuously supplied from the catchment covered by mountainous forests, and reservoir sediments are a long-term important source of bioavailable 137Cs in the riverine system. Our findings provide important parameter values for mid- and long-term assessments of the radiation impact of radionuclide discharges to freshwater environments.
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Affiliation(s)
- Hironori Funaki
- Japan Atomic Energy Agency, 45-169, Kaihama-sukakeba, Minamisoma, Fukushima 975-0036, Japan.
| | - Hideki Tsuji
- National Institute for Environmental Studies, 10-2 Fukasaku, Miharu, Fukushima 963-7700, Japan
| | - Takahiro Nakanishi
- Japan Atomic Energy Agency, 45-169, Kaihama-sukakeba, Minamisoma, Fukushima 975-0036, Japan
| | - Kazuya Yoshimura
- Japan Atomic Energy Agency, 45-169, Kaihama-sukakeba, Minamisoma, Fukushima 975-0036, Japan
| | - Kazuyuki Sakuma
- Japan Atomic Energy Agency, 45-169, Kaihama-sukakeba, Minamisoma, Fukushima 975-0036, Japan
| | - Seiji Hayashi
- National Institute for Environmental Studies, 10-2 Fukasaku, Miharu, Fukushima 963-7700, Japan
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11
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Wang C, Wei Z, Zhao Y, Bai L, Jiang H, Xu H, Xu Y. Resuspension and settlement characteristics of lake sediments amended by phosphorus inactivating materials: Implications for environmental remediation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 302:113892. [PMID: 34688047 DOI: 10.1016/j.jenvman.2021.113892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 09/26/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
The classical lake internal phosphorus (P) pollution control using P-inactivating materials is typically carried out by reducing the release of soluble P from sediments to overlying water; however, particulate P loading through sediment resuspension could also cause internal P pollution for algae breeding. Therefore, based on lanthanum modified bentonite clay (Phoslock®) and drinking water treatment residues (DWTR), the effect of P inactivating materials on sediment resuspension and settlement were comprehensively investigated to assess the variations in particulate P pollution from sediment. Results showed that both materials could effectively control soluble P pollution from sediment, while both had limited effect on the supplement of particulate P to overlying water. The reason may be that hydrodynamic disturbance was the key factor regulating sediment resuspension and settlement. The disturbance induced the resuspension of different sized sediments, especially <8 μm fractions, while increasing disturbing intensities promoted resuspension of relatively larger sized sediments (e.g., <63 μm). Further analysis suggested that after resuspension and settlement, the efficiencies of reducing bioavailable P by Phoslock® in relatively large sized sediment fraction (e.g., <63 μm) were substantially less than those in relatively small sized sediment (<8 μm). Although the reducing efficacies of DWTR had limited changes in different sized sediments, the remaining bioavailable P were clearly higher in smaller sized sediments with DWTR. The different performances on bioavailable P reduction mainly resulted from the distributions of materials and original P in different sized sediments. These findings indicated the potential supplement of particulate P for algal growth during resuspension and settlement of sediments amended by P inactivating materials. Overall, understanding the sediment P bioavailability and hydraulic properties at different sizes and the lake hydrodynamic conditions is essential to develop appropriate methods to control lake internal P pollution.
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Affiliation(s)
- Changhui Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Zhao Wei
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuanyuan Zhao
- Key Laboratory of Water Pollution Control Technology, Hunan Province, Hunan Research Academy of Environmental Sciences, Changsha 410004, China
| | - Leilei Bai
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Helong Jiang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Huacheng Xu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Youze Xu
- Key Laboratory of Water Pollution Control Technology, Hunan Province, Hunan Research Academy of Environmental Sciences, Changsha 410004, China.
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12
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Zhang Y, Shan C, Qian J, Pan B. Scenario oriented strategies for phosphorus management by using environmental nanotechnology. Curr Opin Chem Eng 2021. [DOI: 10.1016/j.coche.2021.100720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Ding S, Liu Y, Dan SF, Jiao L. Historical changes of sedimentary P-binding forms and their ecological driving mechanism in a typical "grass-algae" eutrophic lake. WATER RESEARCH 2021; 204:117604. [PMID: 34517265 DOI: 10.1016/j.watres.2021.117604] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 08/21/2021] [Accepted: 08/23/2021] [Indexed: 06/13/2023]
Abstract
With the transformation of lake ecosystem from "clear water" to "turbid water", the residual phosphorus (P) accumulated in sediments may slow down the process of aquatic ecological restoration, and the related mechanisms are complex and need to be better understood. In this study, high-resolution systematic investigation and analysis of P-binding forms in the sediments showed that Lake Dianchi, the largest plateau lake in Southwest China, was enriched with NaOH-rP, HCl-P and Res-P, but depleted in NH4Cl-P, BD-P and NaOH-nrP. The BD-P, NaOH-nrP and NaOH-rP were the main contributors to potential P release from sediments, while the release potential of NH4Cl-P was relatively weak (<1%). When the external P loading gradually decreased, the internal P loading of Lake Dianchi was estimated to be 522 mg P/(m2•a) in the past 30 years. The succession of "grass-algae" type in Lake Dianchi coincided with reduced absorption and transformation of potential mobile P and decreased accumulation of stable P, especially the Res-P. Meanwhile, the temporal variation of potential mobile P was a good predictor of ecological degradation and reduced ecosystem sustainability in Lake Dianchi.
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Affiliation(s)
- Shuai Ding
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Environmental Standard Institute, Ministry of Ecology and Environment of the People's Republic of China, Beijing 100012, China
| | - Yan Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Environmental Standard Institute, Ministry of Ecology and Environment of the People's Republic of China, Beijing 100012, China
| | - Solomon Felix Dan
- Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China
| | - Lixin Jiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Institute of Water Environment Research, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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14
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Ji N, Zou R, Jiang Q, Liang Z, Hu M, Liu Y, Yu Y, Wang Z, Wang H. Internal positive feedback promotes water quality improvement for a recovering hyper-eutrophic lake: A three-dimensional nutrient flux tracking model. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 772:145505. [PMID: 33581532 DOI: 10.1016/j.scitotenv.2021.145505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 01/24/2021] [Accepted: 01/25/2021] [Indexed: 06/12/2023]
Abstract
Nutrient dynamics in lakes are determined by the combined effects of external and internal nutrient fluxes. However, the feedback loop of nutrient fluxes and water quality changes is still an open question. An integrated three-dimensional flux tracking approach based on the Environmental Fluid Dynamics Code model was established to quantify the long-term dynamic changes in external and internal processes in Lake Dianchi (one of the three most hyper-eutrophic lakes in China), and to explore the potential causes of water quality improvement during 2012-2018. The long-term trends and relative influences of nutrient fluxes on water quality were identified. The results showed that the inflow flux was the largest input source and declined by 50% between 2003 and 2012, which was followed by a stable trend from 2012 to 2018. The second largest input source was benthic release, which exhibited a significant interannual reduction. Algae sedimentation was the largest removal process, and declined by 45% between 2012 and 2018. An integrated analysis demonstrated that, following an external loading reduction prior to 2012, the positive feedback of internal fluxes promoted water quality improvement during 2012-2018. Considering the long timescale of the nutrient-flux feedback mechanism, reducing external loading is still the top priority for a long-term virtuous cycle of water quality in the process of eutrophic lake restoration.
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Affiliation(s)
- Ningning Ji
- College of Environmental Sciences and Engineering, State Environmental Protection Key Laboratory of All Materials Flux in Rivers, Peking University, Beijing 100871, China
| | - Rui Zou
- Rays Computational Intelligence Lab, Beijing Inteliway Environmental Ltd., Beijing 100085, China
| | - Qingsong Jiang
- College of Environmental Sciences and Engineering, State Environmental Protection Key Laboratory of All Materials Flux in Rivers, Peking University, Beijing 100871, China
| | - Zhongyao Liang
- Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State University, 407 Forest Resources Building, University Park, PA 16802, USA
| | - Mengchen Hu
- College of Environmental Sciences and Engineering, State Environmental Protection Key Laboratory of All Materials Flux in Rivers, Peking University, Beijing 100871, China
| | - Yong Liu
- College of Environmental Sciences and Engineering, State Environmental Protection Key Laboratory of All Materials Flux in Rivers, Peking University, Beijing 100871, China; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed, Kunming 650034, China.
| | - Yanhong Yu
- Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed, Kunming 650034, China
| | - Zhiyun Wang
- Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed, Kunming 650034, China
| | - Hailing Wang
- Kunming Dianchi Investment Co., Ltd., Kunming 650100, China
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15
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Liu Z, Zhang Y, Yan P, Luo J, Kong L, Chang J, Liu B, Xu D, He F, Wu Z. Synergistic control of internal phosphorus loading from eutrophic lake sediment using MMF coupled with submerged macrophytes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 731:138697. [PMID: 32438085 DOI: 10.1016/j.scitotenv.2020.138697] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/16/2020] [Accepted: 04/12/2020] [Indexed: 06/11/2023]
Abstract
Sediment phosphorus (P) is the main source of endogenous P for lake eutrophication. An in-situ combined technology for determination the removal effect of sediment P in all fractions was first developed using the novel modified maifanite (MMF) and submerged macrophytes in this study. MMF was synthesized using an acidification process (2.5 mol/L H2SO4) and then a calcination (400 °C) method. The morphology and structure of MMF were characterized by XRD, SEM, XPS, and BET. We tested the removal effects of sediment P by MMF and submerged macrophytes in combination and separately. The results demonstrated that the synergistic removal capacity of sediment P using MMF coupled with submerged macrophytes was higher than the sum of them applied separately. MMF could promote the submerged macrophytes growth and enhance the adsorption of extra P on MMF through root oxygenation and nutrient allocation. The microcosm experiment results showed that sediment from fMMF+V. spiralis exhibited the most microbial diversity and abundance among the sediment. The combination of MMF and submerged macrophytes increased the Firmicutes abundance and decreased the Bacteroidetes. These results indicated that adsorption-biological technology can be regarded as a novel and competitive technology to the endogenous pollution control in eutrophic shallow lakes.
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Affiliation(s)
- Zisen Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Yi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Pan Yan
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ji Luo
- Center for Environmental Research and Technology, University of California-Riverside, California, USA
| | - Lingwei Kong
- Environmental Research and Design Institute of Zhejiang Province, Hangzhou 310007, China
| | - Junjun Chang
- School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China
| | - Biyun Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Dong Xu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Feng He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
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16
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Bartoszek L, Miąsik M, Koszelnik P. Trophic degradation predispositions and intensity in a high-flow, silted reservoir. PeerJ 2020; 8:e9374. [PMID: 32742765 PMCID: PMC7359821 DOI: 10.7717/peerj.9374] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 05/27/2020] [Indexed: 01/29/2023] Open
Abstract
The objective of the work was to demonstrate the relationship between the natural environmental characteristics of a reservoir and its catchment and severity of trophic degradation. The shallow, highly-silted Rzeszów Reservoir (SE Poland) was the object of study. The impact on degradation of internal supply from accumulated bottom sediments was also assessed, using water and sediment sampled in 2013 and 2014. A high value for trophic state was identified for the reservoir on the basis of TSI indexes, while assessed natural resilience to degradation and analysis of the catchment as a supplier of biogenic and organic matter both indicate high susceptibility to cultural eutrophication. Obtained values for equilibrium phosphate concentrations under anoxic conditions (EPC-0) point to the possibility of a more intensive process of internal supply in phosphorus. However, the presence of sediments poor in organic matter suggest no major threat of ongoing eutrophication. Desludging and/or dredging are likely to entail elimination from the ecosystem of a large part of the pollutants accumulated in sediments, as well as the internal supply of phosphate to the water column. However, as external sources are responsible for the advanced degradation of Rzeszów Reservoir, any attempts at reclamation within the water will fail to yield persistent effects if appropriate protective procedures in the catchment are not implemented.
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Affiliation(s)
- Lilianna Bartoszek
- Department of Environmental Engineering and Chemistry, Faculty of Civil and Environmental Engineering and Architecture, Rzeszów University of Technology, Rzeszów, Poland
| | - Małgorzata Miąsik
- Department of Environmental Engineering and Chemistry, Faculty of Civil and Environmental Engineering and Architecture, Rzeszów University of Technology, Rzeszów, Poland
| | - Piotr Koszelnik
- Department of Environmental Engineering and Chemistry, Faculty of Civil and Environmental Engineering and Architecture, Rzeszów University of Technology, Rzeszów, Poland
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17
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Shen X, Yuan N, Wang C. The bioturbation effect of the snail Bellamya aeruginosa on phosphorus immobilisation by drinking water treatment residue in sediment: A long-term continuous flow test. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 266:110579. [PMID: 32310120 DOI: 10.1016/j.jenvman.2020.110579] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 04/05/2020] [Accepted: 04/05/2020] [Indexed: 06/11/2023]
Abstract
This study used a relatively long-term (350 d) continuous flow test to determine the bioturbation effect of a benthic macroinvertebrate (the snail Bellamya aeruginosa) on sediment internal phosphorus (P) pollution control by in-situ immobilisation using drinking water treatment residue (DWTR) as the inactivating agent. The results showed that DWTR substantially reduced P concentration in overlying water, had a limited effect on other overlying water properties, and tended to reduce nitrogen release from the sediment. Variations in overlying water properties induced by DWTR were generally not associated with snail activity or population density. However, the snails were found to promote DWTR burial and induce DWTR mixing within the sediment, indicating that bioturbation could change the distribution of P inactivating agents in sediment. The mobility of P was closely related to oxalate extractable aluminium, iron, and P (Alox, Feox, and Pox, respectively) in sediments at different depths. Typically, mobile P was stable at a relatively low level when the total content of Alox and Feox was >0.750 mmol g-1 or when the ratio of Pox to (Alox + Feox) was <0.05. Given these results, recommended practices include repeated dosing of the immobilising agents at intervals determined by the relationships among mobile P, Pox, Alox, and Feox in the sediment, especially for Al- and Fe-based agents such as DWTR. Overall, the effect of bioturbation on the stability of in-situ P immobilisation in sediment should be fully considered during long-term pollution control.
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Affiliation(s)
- Xiaoxiao Shen
- College of Agricultural Engineering, HoHai University, Nanjing, 210098, China
| | - Nannan Yuan
- Electronic Information Technology School, Nanjing Vocational College of Information Technology, Nanjing, 210023, China
| | - Changhui Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.
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18
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Panksep K, Tamm M, Mantzouki E, Rantala-Ylinen A, Laugaste R, Sivonen K, Tammeorg O, Kisand V. Using Microcystin Gene Copies to Determine Potentially-Toxic Blooms, Example from a Shallow Eutrophic Lake Peipsi. Toxins (Basel) 2020; 12:E211. [PMID: 32225013 PMCID: PMC7232469 DOI: 10.3390/toxins12040211] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/20/2020] [Accepted: 03/24/2020] [Indexed: 11/16/2022] Open
Abstract
Global warming, paired with eutrophication processes, is shifting phytoplankton communities towards the dominance of bloom-forming and potentially toxic cyanobacteria. The ecosystems of shallow lakes are especially vulnerable to these changes. Traditional monitoring via microscopy is not able to quantify the dynamics of toxin-producing cyanobacteria on a proper spatio-temporal scale. Molecular tools are highly sensitive and can be useful as an early warning tool for lake managers. We quantified the potential microcystin (MC) producers in Lake Peipsi using microscopy and quantitative polymerase chain reaction (qPCR) and analysed the relationship between the abundance of the mcyE genes, MC concentration, MC variants and toxin quota per mcyE gene. We also linked environmental factors to the cyanobacteria community composition. In Lake Peipsi, we found rather moderate MC concentrations, but microcystins and microcystin-producing cyanobacteria were widespread across the lake. Nitrate (NO3-) was a main driver behind the cyanobacterial community at the beginning of the growing season, while in late summer it was primarily associated with the soluble reactive phosphorus (SRP) concentration. A positive relationship was found between the MC quota per mcyE gene and water temperature. The most abundant variant-MC-RR-was associated with MC quota per mcyE gene, while other MC variants did not show any significant impact.
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Affiliation(s)
- Kristel Panksep
- Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 51006 Tartu, Estonia
| | - Marju Tamm
- Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 51006 Tartu, Estonia
| | - Evanthia Mantzouki
- Department F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, 1205 Geneva, Switzerland
| | | | - Reet Laugaste
- Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 51006 Tartu, Estonia
| | - Kaarina Sivonen
- Department of Microbiology, University of Helsinki, 00014 Helsinki, Finland
| | - Olga Tammeorg
- Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 51006 Tartu, Estonia
- Ecosystems and Environmental Research Programme, University of Helsinki, 00014 Helsinki, Finland
| | - Veljo Kisand
- Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 51006 Tartu, Estonia
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia
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19
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Tu L, Jarosch KA, Schneider T, Grosjean M. Phosphorus fractions in sediments and their relevance for historical lake eutrophication in the Ponte Tresa basin (Lake Lugano, Switzerland) since 1959. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 685:806-817. [PMID: 31238284 DOI: 10.1016/j.scitotenv.2019.06.243] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 06/13/2019] [Accepted: 06/15/2019] [Indexed: 06/09/2023]
Abstract
Lake Lugano is one of several deep lakes in Switzerland that have not yet recovered from eutrophication after large reductions of external phosphorus (P) loadings. Persistent eutrophication has been attributed mainly to internal P loadings from sediments. To achieve the restoration goals, it is critically important to evaluate the sediment P availability and release risk in this lake. In this study, we combined sequential P extraction (four fractions) with enzyme hydrolysis to assess distribution characteristics of P forms and potential bioavailability of organic P in an anoxic sediment profile from the Ponte Tresa basin of Lake Lugano, southern Switzerland. Labile P forms, i.e. mostly redox-sensitive iron bound P and metal oxides bound P (Al/Fe-P), comprised ~70% of total P in the sediment profile (1959-2017 CE), suggesting a high potential for P release from the anoxic sediment. Potentially bioavailable organic P forms (determined by addition of substrate specific enzymes) were considerably higher in the surface sediments (top 5 cm), which is very likely to release P in the near future with early diagenesis. The net burial rates (NBR) of redox sensitive Fe-P fraction and total P in sediments both showed significant decreasing trends from 1959 to 2017 CE, when trophic levels of the lake increased from mesotrophic to hypertrophic status. We suggest that, in the Ponte Tresa basin, higher eutrophication conditions led to enhanced sediment P release (mainly from redox sensitive Fe-P fraction), thus reducing P-NBR in sediments. This study highlights the concern that in deep monomictic lakes, eutrophication restoration might be hindered by extensive internal P cycling and reduced capacity of sediment P-trapping.
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Affiliation(s)
- Luyao Tu
- Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland; Institute of Geography, University of Bern, 3012 Bern, Switzerland.
| | - Klaus A Jarosch
- Institute of Geography, University of Bern, 3012 Bern, Switzerland
| | - Tobias Schneider
- Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland; Institute of Geography, University of Bern, 3012 Bern, Switzerland
| | - Martin Grosjean
- Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland; Institute of Geography, University of Bern, 3012 Bern, Switzerland
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20
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Navarrete IA, Dicen GP, Perez TR, Mendoza SM, Rallos RV, Labides JLR, Rivera CT, Hallare AV, Claveria RJR. Towards integrated management of a shallow tropical lake: assessment of water quality, sediment geochemistry, and phytoplankton diversity in Lake Palakpakin, Philippines. ENVIRONMENTAL MONITORING AND ASSESSMENT 2019; 191:485. [PMID: 31280379 DOI: 10.1007/s10661-019-7617-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 06/24/2019] [Indexed: 06/09/2023]
Abstract
The limited carrying capacities of shallow tropical lakes render them more vulnerable to ecological problems like eutrophication. Unregulated human activities such as unsustainable aquaculture and urbanization can alter ecosystem dynamics rapidly, and this warrants more comprehensive researches than what has been previously conducted. Here, we presented an integrated assessment of the nutrient dynamics, phytoplankton diversity, and sediment geochemistry in Lake Palakpakin, a shallow tropical lake of volcanic origin, to understand its deteriorating ecological state. Water, phytoplankton, and sediment samples were collected, and in situ water quality measurements were done during wet and dry seasons in four critical areas in the lake, namely, the inlet, center, sanctuary, and outlet. Results revealed that high light extinction coefficient (1.13 m-1), high turbidity (28 NTU), high phosphate concentration (> 2.0.5 mg/L), and the abundance of Microcystis aeruginosa, Anabaena helicoidea, and Lyngbya sp. indicate that from a relatively healthy lake in 2008, Lake Palakpakin has become a eutrophic to hypereutrophic freshwater body. High concentrations of available nutrients such as N and P were detected in the center and sanctuary sediments, which drive the internal nutrient loading in the lake. We recommend that management efforts be directed towards a whole-ecosystem approach in addressing the problem of eutrophication, especially in shallow tropical lakes.
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Affiliation(s)
- Ian A Navarrete
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines.
- College of Agriculture, Food and Environmental Science, Southern Leyte State University, 6608, Hinunangan, Southern Leyte, Philippines.
| | - Gerald P Dicen
- Agriculture Research Section, Atomic Research Division, Department of Science and Technology, Philippine Nuclear Research Institute, Commonwealth Avenue, Diliman, 1101, Quezon City, Philippines
| | - Teresita R Perez
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines
| | - Shinelle M Mendoza
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines
| | - Roland V Rallos
- Agriculture Research Section, Atomic Research Division, Department of Science and Technology, Philippine Nuclear Research Institute, Commonwealth Avenue, Diliman, 1101, Quezon City, Philippines
| | - John Leonard R Labides
- Agriculture Research Section, Atomic Research Division, Department of Science and Technology, Philippine Nuclear Research Institute, Commonwealth Avenue, Diliman, 1101, Quezon City, Philippines
| | - Clarissa T Rivera
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines
| | - Arnold V Hallare
- Department of Biology, College of Arts and Sciences, University of the Philippines-Manila, Padre Faura, 1000, Manila, Philippines
| | - Rene Juna R Claveria
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines
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21
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Frumin GT, Haldna M, Tammeorg O. Trophic Status of Peipus Lake. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363217130242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Tammeorg O, Möls T, Niemistö J, Holmroos H, Horppila J. The actual role of oxygen deficit in the linkage of the water quality and benthic phosphorus release: Potential implications for lake restoration. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 599-600:732-738. [PMID: 28499222 DOI: 10.1016/j.scitotenv.2017.04.244] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 04/30/2017] [Accepted: 04/30/2017] [Indexed: 06/07/2023]
Abstract
Human activities in watersheds have resulted in huge accumulations of phosphorus (P) in sediments that have subsequently hindered restoration efforts of lake water quality managers worldwide. Much controversy exists about the factors that control the release of P from sediments (internal P loading). One of the main debates concerns the role of oxygen deficit (anoxia) in the regulation of water quality. Our results based on a comprehensive set of lakes worldwide demonstrate that internal P loading (IPtot) plays a significant role in water quality regulation. Internal P loading due to anoxia (IPanox) contributes significantly to the IPtot. However, this contribution is insufficient to significantly increase the chlorophyll a (Chl a) concentration in stratifying lakes. In the lakes of the north temperate and boreal zone, this is because the IPanox reaches surface water layer in the end of the growing season. Observed water quality implications of IPtot are most likely caused by the sedimentary P that actually originates from the shallow areas. These findings suggest limitations for the use of aeration (improvement of the oxygen conditions in the hypolimnion) in lake water quality restoration. Moreover, lake ecosystem managers can benefit from our model that enables to predict anoxia triggered sedimentary P release from the combination of lake characteristics. The final decision on the use of aeration is indeed unique to each lake, and lake specific targets should be considered.
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Affiliation(s)
- Olga Tammeorg
- Department of Environmental Sciences, University of Helsinki, P.O. Box 65, FI 00014, Helsinki, Finland; Centre for Limnology, Estonian University of Life Sciences, 61117 Rannu, Tartumaa, Estonia.
| | - Tõnu Möls
- Centre for Limnology, Estonian University of Life Sciences, 61117 Rannu, Tartumaa, Estonia.
| | - Juha Niemistö
- Department of Environmental Sciences, University of Helsinki, P.O. Box 65, FI 00014, Helsinki, Finland.
| | - Heidi Holmroos
- Department of Environmental Sciences, University of Helsinki, P.O. Box 65, FI 00014, Helsinki, Finland.
| | - Jukka Horppila
- Department of Environmental Sciences, University of Helsinki, P.O. Box 65, FI 00014, Helsinki, Finland.
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