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Yin S, Liu Y, Wei C, Zhu D. Comparing molecular signatures of dissolved organic matter (DOM) in four large freshwater lakes differing in hydrological connectivity to the Changjiang River. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174401. [PMID: 38964414 DOI: 10.1016/j.scitotenv.2024.174401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 06/28/2024] [Accepted: 06/29/2024] [Indexed: 07/06/2024]
Abstract
Freshwater lakes serve as active conduits for processing terrestrial dissolved organic matter (DOM), playing a crucial role in global carbon cycle. Little attention has been paid to how hydrological connectivity to a large river would affect the molecular signatures of DOM in lakes. Here, we systematically characterized and compared the molecular signatures of DOM in surface waters of four large freshwater lakes in the middle and lower Changjiang River basin that are directly connected to the river (Lake Dongting and Lake Poyang, referred to as Lakeconnected) or indirectly connected to the river (Lake Chao and Lake Tai, referred to as Lakenonconnected). The DOM in Lakeconnected was found to have similar total organic carbon (TOC)-normalized contents and characteristics of lignin phenols to the DOM in surface waters from the upstream Changjiang river, indicating allochthonous/terrestrial sources from riverine inputs. As indicated by the UV-vis and fluorescence analyses, the DOM in Lakeconnected overall had higher aromaticity and larger average molecular weight as well as stronger allochthonous feature compared to the DOM in Lakenonconnected. Consistently, the FT-ICR MS analysis revealed that the DOM in Lakeconnected had higher molecular diversity, higher unsaturation degree, and larger proportions of highly aromatic compounds. In contrast, the DOM in Lakenonconnected had larger proportions of lipids and peptide-like structures, but lower proportions of aromatic compounds, which could be ascribed to the enhanced autochthonous production and photodegradation due to pollution and eutrophication as well as longer water residence time. The results highlight the strong impacts of the hydrological connectivity to a large river on the molecular signatures of lake DOM. CAPSULE: The hydrological connectivity of the lakes to the Changjiang River has strong impacts on the molecular signatures of lake DOM.
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Affiliation(s)
- Shujun Yin
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China
| | - Yafang Liu
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China
| | - Chenhui Wei
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China
| | - Dongqiang Zhu
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China.
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2
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Feng W, Deng Y, Yang F, Li T, Wang F, Zhang Q, Yao H, Liao H. Underlying mechanisms governing on distribution and stratification of DOM during seasonal freeze-thaw cycles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 928:172211. [PMID: 38583617 DOI: 10.1016/j.scitotenv.2024.172211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 03/24/2024] [Accepted: 04/02/2024] [Indexed: 04/09/2024]
Abstract
During the freeze-thaw cycles of ice-covered lakes, DOM undergoes a series of transformations including enrichment, dispersion, and filtration. However, the mechanisms and influence factors on lake pollution processes remain unclear. Therefore, this study investigates the distribution of DOM components and elucidate the role of ice-layer sieving its mechanisms within ice-water-sediments. Study identifies significant variations in the characteristics of DOM, protein-like substances tend to migrate towards the ice layer, while humic-like substances predominantly remain in water. This selective distribution is primarily influenced by the physical and chemical properties of DOM during the freezing process. The ice layer acts as a sieve, allowing smaller molecules such as protein-like substances to pass through more easily, while larger molecules like humic-like substances are retained in the water. Additionally, Temperature plays a pivotal role in affecting the contents of DOM. As the temperature decreases, the solubility of DOM decreases, leading to its precipitation and enrichment in sediments. Conversely, an increase in temperature can facilitate the release of DOM from sediments into the water. Furthermore, high content of total dissolved solids can affect the solubility and stability of DOM, potentially leading to changes in its composition and distribution. These insights provide a deeper understanding of the complex interplay between thermal processes and chemical dynamics within ice-covered aquatic environments. They offered valuable insights into the behavior of organic pollutants in frozen lake systems. The findings have potential implications for environmental management strategies aimed at mitigating the effects of climate.
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Affiliation(s)
- Weiying Feng
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Yuxin Deng
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Fang Yang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Tingting Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Fu Wang
- School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Qi Zhang
- School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Haipeng Yao
- School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Haiqing Liao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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3
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Borgström A, Hansson LA, Klante C, Sjöstedt J. Wetlands as a potential multifunctioning tool to mitigate eutrophication and brownification. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2024; 34:e2945. [PMID: 38286682 DOI: 10.1002/eap.2945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 09/25/2023] [Accepted: 11/16/2023] [Indexed: 01/31/2024]
Abstract
Eutrophication and brownification are ongoing environmental problems affecting aquatic ecosystems. Due to anthropogenic changes, increasing amounts of organic and inorganic compounds are entering aquatic systems from surrounding catchment areas, increasing both nutrients, total organic carbon (TOC), and water color with societal, as well as ecological consequences. Several studies have focused on the ability of wetlands to reduce nutrients, whereas data on their potential to reduce TOC and water color are scarce. Here we evaluate wetlands as a potential multifunctional tool for mitigating both eutrophication and brownification. Therefore, we performed a study for 18 months in nine wetlands allowing us to estimate the reduction in concentrations of total nitrogen (TN), total phosphorus (TP), TOC and water color. We show that wetland reduction efficiency with respect to these variables was generally higher during summer, but many of the wetlands were also efficient during winter. We also show that some, but not all, wetlands have the potential to reduce TOC, water color and nutrients simultaneously. However, the generalist wetlands that reduced all four parameters were less efficient in reducing each of them than the specialist wetlands that only reduced one or two parameters. In a broader context, generalist wetlands have the potential to function as multifunctional tools to mitigate both eutrophication and brownification of aquatic systems. However, further research is needed to assess the design of the generalist wetlands and to investigate the potential of using several specialist wetlands in the same catchment.
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Affiliation(s)
- Anna Borgström
- Department of Biology/Aquatic Ecology, Lund University, Lund, Sweden
| | - Lars-Anders Hansson
- Department of Biology/Aquatic Ecology, Lund University, Lund, Sweden
- Leibniz Institute for Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
| | - Clemens Klante
- Department of Water Resources Engineering, Faculty of Engineering, Lund University, Lund, Sweden
- Sweden Water Research, Ideon Science Park, Lund, Sweden
| | - Johanna Sjöstedt
- Department of Biology/Aquatic Ecology, Lund University, Lund, Sweden
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4
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He H, Sun N, Li L, Ai J, Zhou H, Yang X, Yang X, Wang D, Zhang W. Effects of dissolved organic matter removal and molecular transformation in different water treatment processes on formation of disinfection byproducts. WATER RESEARCH 2023; 245:120626. [PMID: 37713793 DOI: 10.1016/j.watres.2023.120626] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/16/2023] [Accepted: 09/10/2023] [Indexed: 09/17/2023]
Abstract
Alterations in molecular composition of dissolved organic matter (DOM) during water treatments can influence the composition and toxicity of disinfection by-products (DBPs) in subsequent chlorination disinfection process. In this study, the impacts of DOM composition after various water treatment techniques (coagulation, adsorption, nanofiltration, biological aerated filter (BAF), and their integrated processes) on the generation mechanisms of DBPs were comprehensively explored by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) in combination with GC-MS and LC-MS analysis. The results indicated that coagulation preferentially removed unsaturated (low H/C) and oxidized (high O/C) compounds, whereas adsorption was prone to remove the reduced (low O/C) component that was more reactive with chlorine, leading to lower yields (μg DBP/mg DOC) of trihalomethanes (THMs) and haloacetic acids (HAAs) during subsequent chlorination. The coagulation-adsorption technique exhibited a relatively high removal of both known and unknown DBPs, demonstrating that coagulation and adsorption were complementary for DOM removal at the molecular level. Nanofiltration selectively removed molecules with relatively high O/C, however, those with very low O/C that were more reactive with chlorine could pass through the nanofiltration membrane, resulting in the highest yields of THMs and HAAs. Although BAF was inefficient in removing DBPs precursors, it could convert molecules with low degree of oxidation and unsaturation into highly oxidized and unsaturated ones, thereby significantly enhancing the removal of DBPs precursors in the subsequent coagulation-adsorption process. These findings are instrumental in developing and selecting more effective techniques to minimize the formation of DBPs in water treatment.
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Affiliation(s)
- Hang He
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Niannian Sun
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Lanfeng Li
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Jing Ai
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Hao Zhou
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Xiaoyin Yang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Xiaofang Yang
- National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Dongsheng Wang
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China.
| | - Weijun Zhang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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5
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Bridoux MC, Gaiffe G, Pacholski P, Cangemi S, Vinci G, Spaccini R, Schramm S. Concealed by darkness: Combination of NMR and HRMS reveal the molecular nature of dissolved organic matter in fractured-rock groundwater and connected surface waters. WATER RESEARCH 2023; 243:120392. [PMID: 37542781 DOI: 10.1016/j.watres.2023.120392] [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: 04/18/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 08/07/2023]
Abstract
Detailed molecular composition of solid phase extracted dissolved organic matter (SPEDOM) collected from fractured-rock groundwater was compared to connected surface river water at two different watersheds in the unconfined chalk aquifer of Champagne in France using full scan ultrahigh resolution electrospray and photoionization Fourier transform ion cyclotron mass spectrometry (FT-ICR MS), Orbitrap tandem MS (MS/MS) and 1H magnetic resonance spectroscopy (NMR). 1H NMR spectroscopy indicated that groundwater SPEDOM carried a higher contribution of aliphatic compounds while surface river waters SPEDOM were enriched in carboxyl-rich alicyclic molecules (CRAM), acetate derivatives and oxygenated units. Furthermore, we show here that use of photoionization (APPI(+)) in aquifer studies is key, ionizing about eight times more compounds than ESI in surface river water samples, specifically targeting the dissolved organic nitrogen pool, accounting for more than 50% of the total molecular space, as well as a non-polar, more aromatic fraction; with little overlap with compounds detected by ESI(-) FT-ICR MS. On the other hand, groundwater SPEDOM samples did not show similar selectivity as less molecular diversity was observed in APPI compared to ESI. Mass-difference transformation networks (MDiNs) applied to ESI(-) and APPI(+) FT-ICR MS datasets provided an overview of the biogeochemical relationships within the aquifer, revealing chemical diversity and microbial/abiotic reactions. Finally, the combination of ESI(-) FT-ICR MS and detailed Orbitrap MS/MS analysis revealed a pool of polar, anthropogenic sulfur-containing surfactants in the groundwaters, likely originating from agricultural runoff. Overall, our study shows that in this aquifer, groundwater SPEDOM contains a significantly reduced pool of organic compounds compared to surface river waters, possibly related to a combination of lack of sunlight and adsorption of high O/C formulas to mineral surfaces.
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Affiliation(s)
| | - G Gaiffe
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - P Pacholski
- CEA, DAM, DIF, F-91297 Arpajon, France; Laboratoire de Chimie et de Physique-Approches Multi-échelles des Milieux Complexes (LCP-A2MC), Université de Lorraine, Metz, France
| | - S Cangemi
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l'Ambiente, l'Agroalimentare e Nuovi Materiali (CERMANU), Università di Napoli Federico II, Via Università, 100, Portici (NA), 80055, Italy
| | - G Vinci
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l'Ambiente, l'Agroalimentare e Nuovi Materiali (CERMANU), Università di Napoli Federico II, Via Università, 100, Portici (NA), 80055, Italy
| | - R Spaccini
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l'Ambiente, l'Agroalimentare e Nuovi Materiali (CERMANU), Università di Napoli Federico II, Via Università, 100, Portici (NA), 80055, Italy
| | - S Schramm
- Laboratoire de Chimie et de Physique-Approches Multi-échelles des Milieux Complexes (LCP-A2MC), Université de Lorraine, Metz, France
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6
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Tichá A, Vondrák D, Moravcová A, Chiverrell R, Kuneš P. Climate-related soil saturation and peatland development may have conditioned surface water brownification at a central European lake for millennia. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159982. [PMID: 36356759 DOI: 10.1016/j.scitotenv.2022.159982] [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: 08/20/2022] [Revised: 10/27/2022] [Accepted: 11/01/2022] [Indexed: 06/16/2023]
Abstract
Water brownification has long altered freshwater ecosystems across the northern hemisphere. The intensive surface water brownification of the last 30 years was however preceded by previous long-lasting more humic browning episodes in many catchments. To disentangle a cascade of browning-induced environmental stressors this longer temporal perspective is essential and can be reconstructed using paleolimnological investigations. Here we present a Holocene duration multi-proxy paleolimnological record from a small forest mountain lake in the Bohemian Forest (Czechia) and show that climate-related soil saturation and peatland development has driven surface water brownification for millennia there. A long core retrieved from the central part of the lake was dated using 14C and 210Pb, subsampled and analyzed for diatoms and zoological indicator (chironomids, planktonic cladocerans) remains. X-ray fluorescence (XRF) provided a record of elements sensitive to biogeochemical processes connected to browning and catchment development (P, Ti, Al/Rb, Fe/Ti, Mn/Ti, Si/Ti). Three threshold shifts related to the processes of water browning were detected in both diatom and chironomid successions at ~10.7, ~5.5 and ~4.2 cal. ky BP. Since, postglacial afforestation of the catchment ~10.7 cal. ky BP the lake experienced strong thermal stratification of the waters, but after ~6.8 cal. ky BP soil saturation and expansion of peatlands led to effective shading and probable nutrient limitation within the lake ecosystem. The more intensive in-wash of dissolved organic matter appears to decline after ~4.2 cal. ky BP, when the paludified catchment soils became permanently anoxic. Two temporary negative and positive anomalies of browning progress occur at the same time and may be connected with the "8.2 ka event" and the "4.2 ka event", respectively. The key role of peatlands presence in the catchment was manifested in millennial-scaled browning process and a climatic forcing of long-lasting browning is evidenced by coincidence with the moistening of climate across the northern hemisphere after ~6 cal. ky BP.
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Affiliation(s)
- Anna Tichá
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-12801 Prague 2, Czech Republic.
| | - Daniel Vondrák
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-12801 Prague 2, Czech Republic
| | - Alice Moravcová
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-12801 Prague 2, Czech Republic; Department of Information Sources and Landscape Archaeology, Institute of Archaeology of the CAS, Prague, Letenská 4, 11801 Prague 1, Czech Republic
| | - Richard Chiverrell
- Department of Geography and Planning, School of Environmental Sciences, University of Liverpool, Liverpool L69 7ZT, UK
| | - Petr Kuneš
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-12801 Prague 2, Czech Republic
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7
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An S, Chen F, Chen S, Feng M, Jiang M, Xu L, Wen S, Zhang Q, Xu J, Du Y, Zhang Y. In-lake processing counteracts the effect of allochthonous input on the composition of color dissolved organic matter in a deep lake. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:158970. [PMID: 36162570 DOI: 10.1016/j.scitotenv.2022.158970] [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: 06/19/2022] [Revised: 09/15/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
Color dissolved organic matter (CDOM) plays a key role in lacustrine ecosystems and its composition is commonly mediated by the allochthonous input and autochthonous production. Deep lakes have a strong in-lake processing, which highly affects the sources, composition and cycle of CDOM. Here, the second deepest lake (Lake Fuxian) in China was selected to investigate the effects of allochthonous input and in-lake processing on lacustrine CDOM in deep lakes. Firstly, a detailed survey on CDOM composition across Lake Fuxian in the top water layer and inflowing rivers was carried out in the wet season representing the allochthonous input. In addition, CDOM in Lake Fuxian was compared with those in other lakes with distinct catchment characteristics and lake morphology. The results showed that compared to lacustrine CDOM in Lake Fuxian, the riverine CDOM contained much more humic-like substances, resulting in the humic-like fluorescence intensity peaked at the confluence of rivers into Lake Fuxian. In contrast, CDOM in Lake Fuxian was dominated by the protein-like substance. Comparison of CDOM composition among Lake Fuxian (well-vegetated catchment, deep lakes) with other diverse lakes in China (shallow/deep lakes with poor-vegetated catchment, and shallow lakes with well-vegetated catchment) showed similar CDOM quality in all type lakes, which were dominated by non-humified and autochthonous CDOM. Yet, CDOM quantity increased as the orders of deep lakes within poor-vegetated (Tibetan deep lakes) < the deep lake within well-vegetated catchment (Lake Fuxian) < shallow lakes within poorly-vegetated catchment (Tibetan shallow lakes) < shallow lakes within well-vegetated catchment (lakes along the middle and lower reaches of Yangtze River). Our results evidenced that the effect of allochthonous input on CDOM composition could be counteracted by in-lake processing in deep lakes. For deep lakes, a comprehensive understanding of in-lake processing of CDOM is critical for predicting lacustrine DOM composition and cycle.
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Affiliation(s)
- ShiLin An
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - FeiZhou Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuo Chen
- Department of Biological Sciences, Idaho State University, Pocatello, ID 83209, USA; Odum School of Ecology, University of Georgia, Athens, GA 30602, USA
| | - MuHua Feng
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - MingLiang Jiang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - LiGang Xu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - ShuaiLong Wen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - QiaoYing Zhang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - JinDuo Xu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - YingXun Du
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - YunLin Zhang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
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8
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Xu L, Hu Q, Liao L, Duan Z, Liu S, Chen L, Zhu Q, Zhong A. Hydrological isolation affected the chemo-diversity of dissolved organic matter in a large river-connected lake (Poyang Lake, China). THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158047. [PMID: 35985600 DOI: 10.1016/j.scitotenv.2022.158047] [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: 06/02/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 06/15/2023]
Abstract
The transportation processes during aquatic systems regulate the ultimate chemistry of dissolved organic matter (DOM), and in recent years, climate changes and human activities have altered the hydrological patterns of many rivers and lakes, which generated some severe issues, such as hydrological isolation. However, how hydrological isolation affects variations of DOM chemistry in large lake systems is still poorly understood. Here, optical properties and molecular compositions of DOM samples derived from a large river-connected lake (Poyang Lake, China) and its nearby seasonal sub-lakes (formed by hydrological isolation) were characterized using Fourier transform ion cyclotron resonance mass spectrometry (FT ICR MS) and ultraviolet-visible (UV-Vis) spectroscopy. The results revealed more abundance of organic matter in sub-lakes than that in the main lake according to high dissolved organic carbon (DOC) concentrations and absorption coefficients (a254 and a280). Large proportions of CHOS formulas were identified by FT ICR MS in sub-lakes DOM, which were produced through Kraft reactions (sulfide/bisulfide + lignin CHO → CHOS) in the interface of sediment/water, and greatly contributed to aliphatic compounds. In addition, obvious variations of compounds (such as polyphenols, highly unsaturated and aliphatic compounds) and lability of DOM were observed between sub-lakes and main lakes, which were mainly caused by the different degradation pathways of DOM (photodegradation in sub-lakes while biodegradation in the main lake). Our results demonstrated that hydrological isolation has significant impacts on DOM chemistry, and provides an improved understanding of the DOM biogeochemistry process in Poyang Lake and supports the management of the large lake systems.
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Affiliation(s)
- Lei Xu
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China.
| | - Qian Hu
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China
| | - Libing Liao
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China
| | - Zhongxin Duan
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China
| | - Songping Liu
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China
| | - Ludan Chen
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China
| | - Qiuping Zhu
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China
| | - Aiwen Zhong
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China.
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9
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He H, Xu H, Li L, Yang X, Fu Q, Yang X, Zhang W, Wang D. Molecular transformation of dissolved organic matter and the formation of disinfection byproducts in full-scale surface water treatment processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156547. [PMID: 35688238 DOI: 10.1016/j.scitotenv.2022.156547] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/26/2022] [Accepted: 06/04/2022] [Indexed: 06/15/2023]
Abstract
Dissolved organic matters (DOM) have important effects on the performance of surface water treatment processes and may convert into disinfection by-products (DBPs) during disinfection. In this work, the transformation of DOM and the chlorinated DBPs (Cl-DBPs) formation in two different full-scale surface water treatment processes (process 1: prechlorination-coagulation-precipitation-filtration; process 2: coagulation-precipitation-post-disinfection-filtration) were comparatively investigated at molecular scale. The results showed that coagulation preferentially removed unsaturated (H/C < 1.0 and DBE > 17) and oxidized (O/C > 0.5) compounds containing more carboxyl groups. Therefore, prechlorination produced more Cl-DBPs with H/C < 1.0 and O/C > 0.5 than post-disinfection. However, the algal in the influent produced many reduced molecules (O/C < 0.5) without prechlorination, and these compounds were more reactive with disinfectants. Sand filtration was ineffective in DOM removal, while microorganisms in the filter produced high molecular weight (MW) substances that were involved in the Cl-DBPs formation, causing the generation of higher MW Cl-DBPs under post-disinfection. Furthermore, the CHO molecules with high O atom number and the CHON molecules containing one N atom were the main Cl-DBPs precursors in both surface water treatment processes. In consideration of the putative Cl-DBPs precursors and their reaction pathways, the precursors with higher unsaturation degree and aromaticity were prone to produce Cl-DBPs through addition reactions, while that with higher saturation degree tended to form Cl-DBPs through substitution reactions. These findings are useful to optimize the treatment processes to ensure the safety of water quality.
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Affiliation(s)
- Hang He
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, Ministry of Ecology and Environment, Wuhan 430074, Hubei, China
| | - Hui Xu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Yangtze River Delta Branch, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Yiwu 322000, Zhejiang, China
| | - Lanfeng Li
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, Ministry of Ecology and Environment, Wuhan 430074, Hubei, China
| | - Xiaofang Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Yangtze River Delta Branch, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Yiwu 322000, Zhejiang, China
| | - Qinglong Fu
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, Ministry of Ecology and Environment, Wuhan 430074, Hubei, China
| | - Xiaoyin Yang
- Yangtze River Delta Branch, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Yiwu 322000, Zhejiang, China
| | - Weijun Zhang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, Ministry of Ecology and Environment, Wuhan 430074, Hubei, China.
| | - Dongsheng Wang
- Yangtze River Delta Branch, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Yiwu 322000, Zhejiang, China; Department of Environmental Engineering, Zhejiang university, Hangzhou 310058, Zhejiang, China
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10
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Zhang L, Xu YJ, Li S. Riverine dissolved organic matter (DOM) as affected by urbanization gradient. ENVIRONMENTAL RESEARCH 2022; 212:113457. [PMID: 35561829 DOI: 10.1016/j.envres.2022.113457] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 05/02/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
Rapid urbanization has considerably altered carbon biogeochemical cycle and river hydrology. However, the influences of urban land use and urban-induced nutrient increase on dissolved organic matter (DOM) characteristics are poorly understood. Here we hypothesize that the alterations significantly change sources and levels of DOM in river systems that drain the urban areas. To test the hypothesis, we investigated DOM in headwater rivers with varied urban intensities in the Three Gorges Reservoir Area (TGRA), China, through field sampling conducted in the dry and wet seasons. We found positive relationships of urban land (%Urban) with DOC concentration and chromophoric DOM (CDOM) absorption coefficients a254, a280 and a350, as well as fluorescence index (FI370), indicating the significantly increased levels of DOM and autochthonous sources along an urbanization gradient. A stepwise regression analysis demonstrated that occurrences of DOC and CDOM can be predicted by %Urban, while increasing autochthonous source is predictable by the increase in riverine nitrogen. Moreover, a254, a280 and FI370 values showed distinct seasonal variations, with significantly higher CDOM concentration in the wet season and with much higher autochthonous signal in the dry season with high nitrogen loading. Based on the findings, we conclude that urbanization influences occurrences and sources of DOM, with increasing urbanization making an important and direct contribution to DOM, and an indirect effect of urban induced nutrient enrichment, i.e., enhanced nutrient loadings increase autochthonous DOM production in rivers.
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Affiliation(s)
- Liuqing Zhang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing, 400714, China
| | - Y Jun Xu
- School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA; Coastal Studies Institute, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Siyue Li
- Institute of Changjiang Water Environment and Ecological Security, School of Environmental Ecology and Biological Engineering, Key Laboratory for Green Chemical Process of Ministry of Education, Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan, 430205, China.
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11
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Hao X, Ouyang W, Zhang K, Wan X, Cui X, Zhu W. Enhanced release, export, and transport of diffuse nutrients from litter in forested watersheds with climate warming. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 837:155897. [PMID: 35569656 DOI: 10.1016/j.scitotenv.2022.155897] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/08/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
Variations in litter decomposition and nutrient migration are constraints to accurately estimate watershed diffuse forest pollution under the combined effects of topographic heterogeneity and climate change. In this study, remote sensing data, decomposition and leaching experiments, and the Soil and Water Assessment Tool (SWAT) were used to quantify the release, export, and transport characteristics of diffuse nutrients from forest litter under two climate scenarios (the current climate condition [S1] and the future warming and drying climate condition [S2]), and the impacts on aquatic environment were identified. The annual litter decomposition was 27.80 × 106 t in S2, which was 1.39 times that of S1. Additionally, the annual litter nutrient release in S2 (C, N, and P was 8.65 × 106, 3.31 × 105, and 1.57 × 104 t, respectively) also increased by 31.16%-45.62% compared with that of S1. The spatial patterns of nutrient export showed that the annual exports of C, N, and P in S1 were 109.77, 46.85, and 0.43 kg/ha, respectively. The annual nutrient export in S2 increased by 1.44 times, and S2 also had higher values of nutrient transport. In addition, variation trends of temperature and precipitation increased significantly with increasing altitude, which promoted differences in nutrient transport between S1 and S2 in the high-altitude areas. The response analysis of the diffuse nutrient in surface water also indicated that forest nutrient discharge load were critical factors affecting the aquatic environmental quality. This study indicated that climate warming accelerated litter decomposition and made litter a potential source of diffuse forest pollution, and watershed discharge load varied intensively with the terrestrial conditions. The combination of experiments and modeling can improve the accuracy of diffuse forest pollution simulation and provide valuable information for formulating watershed climate change adaptation strategies.
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Affiliation(s)
- Xin Hao
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Wei Ouyang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Advanced interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai 519087, China.
| | - Kehao Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xinyue Wan
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xintong Cui
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Weihong Zhu
- School of Geographic and Ocean Sciences, Key laboratory of Wetland Ecological Functions and Ecological Security, Yanbian University, Yanji, Jilin 133000, China
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12
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Reinl KL, Harris TD, Elfferich I, Coker A, Zhan Q, De Senerpont Domis LN, Morales-Williams AM, Bhattacharya R, Grossart HP, North RL, Sweetman JN. The role of organic nutrients in structuring freshwater phytoplankton communities in a rapidly changing world. WATER RESEARCH 2022; 219:118573. [PMID: 35643062 DOI: 10.1016/j.watres.2022.118573] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/27/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
Carbon, nitrogen, and phosphorus are critical macroelements in freshwater systems. Historically, researchers and managers have focused on inorganic forms, based on the premise that the organic pool was not available for direct uptake by phytoplankton. We now know that phytoplankton can tap the organic nutrient pool through a number of mechanisms including direct uptake, enzymatic hydrolysis, mixotrophy, and through symbiotic relationships with microbial communities. In this review, we explore these mechanisms considering current and projected future anthropogenically-driven changes to freshwater systems. In particular, we focus on how naturally- and anthropogenically- derived organic nutrients can influence phytoplankton community structure. We also synthesize knowledge gaps regarding phytoplankton physiology and the potential challenges of nutrient management in an organically dynamic and anthropogenically modified world. Our review provides a basis for exploring these topics and suggests several avenues for future work on the relation between organic nutrients and eutrophication and their ecological implications in freshwater systems.
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Affiliation(s)
- Kaitlin L Reinl
- Lake Superior National Estuarine Research Reserve, University of Wisconsin-Madison Division of Extension, 14 Marina Drive, Superior, Wisconsin 54880, US; University of Wisconsin-Madison, Center for Limnology, 608 N. Park St., Madison, WI, US; University of Minnesota-Duluth, Large Lakes Observatory, 2205 E. 5th St., Duluth, MN, US.
| | - Ted D Harris
- Kansas Biological Survey and Center for Ecological Research, 2101 Constant Ave., Lawrence, KS, US
| | - Inge Elfferich
- Cardiff University, Earth and Environmental Sciences, Main Building, Park Place CF10 3AT, Cardiff, UK
| | - Ayooluwateso Coker
- University of Minnesota-Duluth, Large Lakes Observatory, 2205 E. 5th St., Duluth, MN, US
| | - Qing Zhan
- Netherlands Institute of Ecology, Dept. of Aquatic Ecology, Droevendaalsesteeg 10, Wageningen, NL
| | | | - Ana M Morales-Williams
- University of Vermont, Rubenstein School of Environment and Natural Resources, 81 Carrigan Drive, Burlington, VT, US
| | - Ruchi Bhattacharya
- University of Waterloo, Department of Earth and Environmental Sciences, 200 University Ave., N2L 1V6, Waterloo, ON, CA
| | - Hans-Peter Grossart
- Leibniz Institute for Freshwater Ecology and Inland Fisheries (IGB), Dept. Plankton and Microbial Ecology, Zur alten Fischerhuette 2, D-16775 Stechlin, DE; Potsdam University, Institute of Biochemistry and Biology, Maulbeerallee 2, 14469 Potsdam
| | - Rebecca L North
- University of Missouri-Columbia, School of Natural Resources, 303L Anheuser Busch Natural Resource Building, Columbia, MO, US
| | - Jon N Sweetman
- Pennsylvania State University, Ecological Science and Management, 457 Agriculture Sciences and Industries Building, State College, PA, US
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13
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Zhao YQ, Shen J, Feng JM, Wang XZ. Relative contributions of different sources to DOM in Erhai Lake as revealed by PLS-PM. CHEMOSPHERE 2022; 299:134377. [PMID: 35364075 DOI: 10.1016/j.chemosphere.2022.134377] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 03/09/2022] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Dissolved organic matter (DOM) is a complex mixture of organic molecules that plays an important role in freshwater lake ecosystems. Excitation emission matrix-parallel factor analysis (EEM-PARAFAC) is an important tool for the identification and source analysis of DOM but is still inadequate for studying the differences and quantifying the contributions of different sources. Here, based on the maximum fluorescence intensities (Fmax) of the four fluorescent components (e.g., protein-like component C1, and the humic-like components C2, C3, C4) identified by EEM-PARAFAC, combined with large-scale data obtained from observations at Erhai Lake, we used partial least squares path modeling (PLS-PM) to improve the understanding of the migration and transformation mechanisms of DOM. The results showed that the phytoplankton and trophic state had greater impacts on DOM, while the impacts of sediment and inflow rivers were less significant. The results of the models that used nitrogen nutrients (N) and phosphorus nutrients (P) to separately indicate the trophic state suggested that the driving force of P on DOM was stronger than that of N in Erhai Lake. Among the four fluorescent components, the protein-like component with the largest relative proportion (41.98%) was mainly affected by phytoplankton, which was consistent with the autogenic characteristics obtained through spontaneous source index (BIX). The duality of the humic-like components was consistent with the duality of DOM through fluorescent index (FI). C3 had a higher sensitivity to the trophic state than the other components, and C2 received the greatest positive contribution from the rivers entering the lake. These results provide an improved insight into the influence of different sources on the behavior of DOM and demonstrate the potential of using PLS-PM to study the complex driving mechanism of aquatic biogeochemical parameters.
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Affiliation(s)
- Yu-Quan Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; National Observation and Research Station of Erhai Lake Ecosystem in Yunnan, Dali, China
| | - Jian Shen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; National Observation and Research Station of Erhai Lake Ecosystem in Yunnan, Dali, China; Yunnan Dali Research Institute of Shanghai Jiao Tong University, Dali, China.
| | - Ji-Meng Feng
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; National Observation and Research Station of Erhai Lake Ecosystem in Yunnan, Dali, China; Yunnan Dali Research Institute of Shanghai Jiao Tong University, Dali, China
| | - Xin-Ze Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; National Observation and Research Station of Erhai Lake Ecosystem in Yunnan, Dali, China; Yunnan Dali Research Institute of Shanghai Jiao Tong University, Dali, China.
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14
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Andrade VS, Gutierrez MF, Gagneten AM. Effect of rainfall runoff from agricultural areas and seasonal crop practices on zooplankton community in Pampean streams, Argentina. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:41713-41724. [PMID: 35098456 DOI: 10.1007/s11356-021-18417-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Extreme climatic events are considered one of the main consequences of climate change. In the Pampas region, Argentina, an intensification of rainfall is expected during the periods of maximum agrochemical application. This study assesses the main factors determining the zooplankton community attributes in three streams belonging to the agricultural Pampas region, Argentina, and the effect of rainfall and seasonal crop practices on the zooplankton community composition. Sampling campaigns were performed before and after three rainfall events during two seasonal crop practices: (1) soybean chemical fallow-sowing and corn vegetative growth-flowering, (2) soybean vegetative growth-grain filling and corn sowing. The runoff in agricultural areas affected the zooplankton community attributes and composition. The biological oxygen demand, turbidity, and conductivity were the main water quality variables affecting the zooplankton community attributes. The increase of these variables after rainfall or during pre-emergence crop practices favoured the zooplankton groups most tolerant to eutrophication such as Bdelloidea, Chydoridae, Moinidae, and Sididae. Factors such as rainfall and seasonal crop practices must be considered in environmental monitoring design.
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Affiliation(s)
- Victoria Soledad Andrade
- Laboratorio de Ecotoxicología, Departamento de Ciencias Naturales, Facultad de Humanidades Y Ciencias, Universidad Nacional del Litoral (UNL), Ciudad Universitaria, Santa Fe, 3000, Argentina.
- Consejo Nacional de Investigaciones Científicas Y Tecnológicas (CONICET), Nat. Route 168, Km 0, Santa Fe, 3000, Argentina.
| | - María Florencia Gutierrez
- Consejo Nacional de Investigaciones Científicas Y Tecnológicas (CONICET), Nat. Route 168, Km 0, Santa Fe, 3000, Argentina
- Instituto Nacional de Limnología (INALI-CONICET-UNL), Ciudad Universitaria, Santa Fe, 3000, Argentina
- Facultad de Bioquímica Y Ciencias Biológicas - Escuela Superior de Sanidad "Dr. Ramón Carrillo", UNL, Ciudad Universitaria, Santa Fe, 3000, Argentina
| | - Ana María Gagneten
- Laboratorio de Ecotoxicología, Departamento de Ciencias Naturales, Facultad de Humanidades Y Ciencias, Universidad Nacional del Litoral (UNL), Ciudad Universitaria, Santa Fe, 3000, Argentina
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15
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Zhu Y, Chen H, Jia Q, Liu H, Ye J. Interactions of anthropogenic and terrestrial sources drive the varying trends in molecular chemodiversity profiles of DOM in urban storm runoff, compared to land use patterns. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 817:152990. [PMID: 35026245 DOI: 10.1016/j.scitotenv.2022.152990] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 01/03/2022] [Accepted: 01/05/2022] [Indexed: 06/14/2023]
Abstract
Variations in land use drive the heterogeneous nature of dissolved organic matter (DOM) in storm runoff. However, in the context of the currently complicated multifactor interactions of urban land use, contamination occurrence, and environmental management, it is unclear how the molecular chemodiversity of storm runoff DOM responds to land use patterns or potential anthropogenic sources. Using Fourier-transform ion cyclotron resonance mass spectrometry, this study evaluated the molecular chemodiversity profiles of DOM in urban storm runoff from different land use and underlying surface pavement combinations. The chemodiversity of suburban forest runoff-associated DOM was characterized by high lignin and tannin abundance, predominance of CHO molecules, less heteroatoms, high molecular mass, and highly unsaturated and aromatic compounds. Urban storm runoff-associated DOM was predominantly characterized by abundant lipids, proteins, and carbohydrates, low-mass molecules, abundant S- and P-bearing heteroatoms, and high saturation. The low conformity of unique molecular features co-occurring across urban land-uses suggests a relatively incohesive pool in the urban storm runoff-associated DOM, i.e., high chemodiversity. The reconstructed source-derived patterns significantly drive the directional trends in DOM of urban storm runoff, oppositely shifting toward high saturation vs. high unsaturation and aromatization features. This demonstrates that unveiling the interactions of anthropogenic and terrestrial sources in order to understand the underlying mechanism is critical for our ability to track and predict the current and future turnover in DOM chemodiversity in storm runoff in the context of the global trend of upgrading urban environment management, following recognition of their probable links with urban land-uses. Underlying surface pavement can hardly superimpose a directional effect to alter the discrepancies in the dominant molecules of each urban land use further. These findings reveal the importance of understanding DOM characteristics at a molecular level and potentially enable targeted control of ecological risks in receiving ecosystems induced by urban storm runoff.
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Affiliation(s)
- Yi Zhu
- Shanghai Academy of Environmental Sciences, 200233 Shanghai, China
| | - Hao Chen
- Shanghai Academy of Environmental Sciences, 200233 Shanghai, China.
| | - Qilong Jia
- East China University of Science and Technology, School of Resources and Environmental Engineering, 200237 Shanghai, China
| | - Hui Liu
- Shanghai Academy of Environmental Sciences, 200233 Shanghai, China
| | - Jianfeng Ye
- Shanghai Academy of Environmental Sciences, 200233 Shanghai, China
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16
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Blanchet CC, Arzel C, Davranche A, Kahilainen KK, Secondi J, Taipale S, Lindberg H, Loehr J, Manninen-Johansen S, Sundell J, Maanan M, Nummi P. Ecology and extent of freshwater browning - What we know and what should be studied next in the context of global change. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 812:152420. [PMID: 34953836 DOI: 10.1016/j.scitotenv.2021.152420] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 12/10/2021] [Accepted: 12/11/2021] [Indexed: 06/14/2023]
Abstract
Water browning or brownification refers to increasing water color, often related to increasing dissolved organic matter (DOM) and carbon (DOC) content in freshwaters. Browning has been recognized as a significant physicochemical phenomenon altering boreal lakes, but our understanding of its ecological consequences in different freshwater habitats and regions is limited. Here, we review the consequences of browning on different freshwater habitats, food webs and aquatic-terrestrial habitat coupling. We examine global trends of browning and DOM/DOC, and the use of remote sensing as a tool to investigate browning from local to global scales. Studies have focused on lakes and rivers while seldom addressing effects at the catchment scale. Other freshwater habitats such as small and temporary waterbodies have been overlooked, making the study of the entire network of the catchment incomplete. While past research investigated the response of primary producers, aquatic invertebrates and fishes, the effects of browning on macrophytes, invasive species, and food webs have been understudied. Research has focused on freshwater habitats without considering the fluxes between aquatic and terrestrial habitats. We highlight the importance of understanding how the changes in one habitat may cascade to another. Browning is a broader phenomenon than the heretofore concentration on the boreal region. Overall, we propose that future studies improve the ecological understanding of browning through the following research actions: 1) increasing our knowledge of ecological processes of browning in other wetland types than lakes and rivers, 2) assessing the impact of browning on aquatic food webs at multiple scales, 3) examining the effects of browning on aquatic-terrestrial habitat coupling, 4) expanding our knowledge of browning from the local to global scale, and 5) using remote sensing to examine browning and its ecological consequences.
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Affiliation(s)
- Clarisse C Blanchet
- Department of Biology, FI-20014, University of Turku, Finland; Department of Forest Sciences, P.O. Box 27, University of Helsinki, FI-00014 Helsinki, Finland.
| | - Céline Arzel
- Department of Biology, FI-20014, University of Turku, Finland
| | - Aurélie Davranche
- CNRS UMR 6554 LETG, University of Angers, 2 Boulevard Lavoisier, FR-49000 Angers, France
| | - Kimmo K Kahilainen
- University of Helsinki, Lammi Biological Station, Pääjärventie 320, FI-16900 Lammi, Finland
| | - Jean Secondi
- University of Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France; Faculty of Sciences, University of Angers, F-49000 Angers, France
| | - Sami Taipale
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Henrik Lindberg
- HAMK University of Applied Sciences, Forestry Programme, Saarelantie 1, FI-16970 Evo, Finland
| | - John Loehr
- University of Helsinki, Lammi Biological Station, Pääjärventie 320, FI-16900 Lammi, Finland
| | | | - Janne Sundell
- University of Helsinki, Lammi Biological Station, Pääjärventie 320, FI-16900 Lammi, Finland
| | - Mohamed Maanan
- UMR CNRS 6554, University of Nantes, F-44000 Nantes, France
| | - Petri Nummi
- Department of Forest Sciences, P.O. Box 27, University of Helsinki, FI-00014 Helsinki, Finland
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17
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Complete genome of Pelagovum pacificum SM1903 T isolated from the marine surface oligotrophic environment. Mar Genomics 2021; 59:100874. [PMID: 34493388 DOI: 10.1016/j.margen.2021.100874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 04/06/2021] [Accepted: 04/12/2021] [Indexed: 11/21/2022]
Abstract
Pelagovum pacificum SM1903T, belonging to a novel genus of the family Rhodobacteraceae, was isolated from the surface seawater of the Mariana Trench. Here, we report the first complete genome sequence of the novel genus Pelagovum. The genome of strain SM1903T consists of a circular chromosome of 4,040,866 bp and two plasmids of 41,363 bp and 9705 bp, respectively. Gene annotation and metabolic pathway analyses showed that strain SM1903T possesses a series of genes related to adaptation to marine oligotrophic environments, which are involved in utilization of aromatic compounds, allantoin, and alkylphosphonate, and second messenger signaling in response to the oligotrophic stress. This strain also contains a variety of genes involved in coping with other stresses including osmotic stress, oxidative stress, cold shock, and heat shock. These features would assist this strain to survive under the natural nutrient limitation and other stresses from the environment. The genome of strain SM1903T of the novel genus Pelagovum would deepen our knowledge on marine bacterioplankton and their adaption strategies to marine oligotrophic environments.
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18
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Sawicka K, Clark JM, Vanguelova E, Monteith DT, Wade AJ. Spatial properties affecting the sensitivity of soil water dissolved organic carbon long-term median concentrations and trends. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 780:146670. [PMID: 34030324 DOI: 10.1016/j.scitotenv.2021.146670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 03/17/2021] [Accepted: 03/17/2021] [Indexed: 06/12/2023]
Abstract
It is increasingly clear that increases in dissolved organic carbon in upland waters in recent decades have often been dominated by acid deposition, but reasons for substantial variation in rates of change remain unclear. This paper focuses on the extent to which spatial properties, such as variation in soil properties, atmospheric deposition and climate, affect the sensitivity of DOC concentrations in soil water. The purpose is to i) examine evidence for differences in site average concentrations and trends in soil water DOC between sites with contrasting ecosystem properties, i.e. vegetation cover and soil type, and ii) identify the wider combination of site characteristics that best explain variation in these DOC metrics between sites. We collated soil water and deposition chemistry, soil chemistry and meteorological data from 15 long-term UK monitoring sites (1992-2010) covering a range of soils, vegetation, climate and acid deposition levels. Mineral soils under forests showed the greatest range of long-term mean DOC concentrations and trends. Regression analysis indicated that acid and sea-salt deposition, and soil sensitivity to acidification were the factors most strongly associated with spatial variation in mean DOC concentrations. Spatial variation in DOC trends were best explained by Al saturation and water flux. Overall, the sensitivity of DOC release from soil to changes in pollutant deposition could be related to the type of vegetation cover and soils chemistry properties, such as Al saturation, divalent base cation content and hydrological regime. The identification of the ecosystem properties that appear most influential in modifying DOC production and responses to long-term drivers, helps elucidate potential mechanistic explanations for differences in DOC dynamics across seemingly similar ecosystems, and points to the importance of DOC mobility in regulating its dynamics.
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Affiliation(s)
- Katarzyna Sawicka
- Soil Research Centre, Department of Geography and Environmental Science, University of Reading, Reading RG6 6DW, UK; UK Centre for Ecology & Hydrology, Environment Centre Wales, Deiniol Road, Bangor LL57 2UW, UK; Environmental Science Group, Wageningen University, PO Box 47, 6700 AA Wageningen, the Netherlands.
| | - Joanna M Clark
- Soil Research Centre, Department of Geography and Environmental Science, University of Reading, Reading RG6 6DW, UK
| | - Elena Vanguelova
- Centre for Ecosystems, Society and Biosecurity, Forest Research, Alice Holt Lodge, Farnham, Surrey GU10 4LH, UK
| | - Don T Monteith
- Environmental Change Network, UK Centre for Ecology and Hydrology, Lancaster Environment Centre, Bailrigg, Lancaster LA1 4AP, UK
| | - Andrew J Wade
- Soil Research Centre, Department of Geography and Environmental Science, University of Reading, Reading RG6 6DW, UK
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19
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Liu F, Wang D, Zhang B, Huang J. Concentration and biodegradability of dissolved organic carbon derived from soils: A global perspective. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 754:142378. [PMID: 33254924 DOI: 10.1016/j.scitotenv.2020.142378] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/11/2020] [Accepted: 09/11/2020] [Indexed: 06/12/2023]
Abstract
Dissolved organic carbon (DOC), as active and mobile carbon, plays a critical role in terrestrial and aquatic ecosystems. However, it remains unclear how the concentration and biodegradability of soil-derived DOC (extracted from pore water or soil leachates) vary over a global scale and what determines the variations in DOC concentration and biodegradability. Here we addressed this issue by synthesizing the dataset involved in 121 sites from 39 literatures worldwide, and analyzed the patterns and drivers of DOC concentration and biodegradability. Our results showed that the DOC concentration in either pore water or soil leachates varied considerably, with mean values of 33.2 mg L-1 in pore water and 213.5 mg kg-1 in soil leachates, respectively. Mean annual precipitation (MAP) was the dominant control on the variability in soil-derived DOC concentration. Our results also revealed that the biodegradability of DOC in pore water was significantly lower than that in soil leachates, with the means of 16.5% versus 28.7%, respectively. Specific UV absorbance (SUVA254, a parameter used for evaluating dissolved aromatic carbon content) was the primary indicator predicting the spatial variation in DOC biodegradability, whereas MAP exerted limited effects on DOC biodegradability. These results demonstrate the high biodegradability of soil-derived DOC, highlighting its crucial role in the global carbon cycle under climate change.
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Affiliation(s)
- Futing Liu
- Research Institute of Natural Protected Area, Chinese Academy of Forestry, Beijing 100091, China; Key Laboratory of Tree Breeding and Cultivation of the State Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Dong Wang
- Research Institute of Natural Protected Area, Chinese Academy of Forestry, Beijing 100091, China; Key Laboratory of Tree Breeding and Cultivation of the State Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China.
| | - Beibei Zhang
- Key Laboratory of Forest Ecology and Environment of the State Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
| | - Jin Huang
- Key Laboratory of Tree Breeding and Cultivation of the State Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
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20
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Du Y, Lu Y, Roebuck JA, Liu D, Chen F, Zeng Q, Xiao K, He H, Liu Z, Zhang Y, Jaffé R. Direct versus indirect effects of human activities on dissolved organic matter in highly impacted lakes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 752:141839. [PMID: 32889275 DOI: 10.1016/j.scitotenv.2020.141839] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/18/2020] [Accepted: 08/19/2020] [Indexed: 06/11/2023]
Abstract
Human activities can alter dissolved organic matter (DOM) in lakes through both direct (i.e., exporting DOM of anthropogenic sources) and indirect effects (i.e., enhancing the autochthonous production of DOM via nutrient loading). Distinguishing between the direct and indirect effects is important to better understand human impacts on aquatic systems, but it remains highly challenging due to the interdependence of associated environmental variables. Here, we demonstrated that disentangling the direct and indirect effects can be achieved through combining large-scale environmental monitoring with the Partial Least Squares Path Modeling (PLS-PM). We presented DOM data from 61 lakes within the floodplain of the Yangtze River (Lakes-YR), China, a region that has been subjected to intense anthropogenic disturbances. We analyzed the amount and composition of DOM through dissolved organic carbon (DOC), chromophoric DOM (CDOM), and fluorescent DOM (FDOM). Four fluorescence components were identified, including one tyrosine-like component, one tryptophan-like component, and two humic-like components. Most of the lakes were dominated by freshly produced DOM with small molecular weights and low humification. Results from the PLS-PM models showed that the autochthonous production was more important than anthropogenic inputs in mediating DOC and CDOM. In contrast, FDOM parameters in lakes were more sensitive to the direct, anthropogenic sources, including treated domestic, industrial wastewater, and the effluents of aquaculture. These sources can be identified by elevated FDOM content per DOC (FDOM: DOC ratio) relative to autochthonous DOM, suggesting the potential of using FDOM as a tracer to identify and monitor the contribution of anthropogenic organic matter to inland waters.
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Affiliation(s)
- YingXun Du
- Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008, China.
| | - YueHan Lu
- Department of Geological Sciences, The University of Alabama, 201 7th Ave, Tuscaloosa, AL 35485, USA
| | - J Alan Roebuck
- Department of Earth Sciences, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada; Southeast Environmental Research Center & Department of Chemistry & Biochemistry, Florida International University, Miami, FL 33199, USA
| | - Dong Liu
- Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008, China
| | - FeiZhou Chen
- Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008, China
| | - QingFei Zeng
- Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008, China
| | - Kang Xiao
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hu He
- Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008, China
| | - ZhengWen Liu
- Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008, China
| | - YunLin Zhang
- Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008, China
| | - Rudolf Jaffé
- Southeast Environmental Research Center & Department of Chemistry & Biochemistry, Florida International University, Miami, FL 33199, USA
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21
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Nosrati K, Collins AL, Fiener P. Using catchment characteristics to model seasonality of dissolved organic carbon fluxes in semi-arid mountainous headwaters. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:674. [PMID: 33011837 DOI: 10.1007/s10661-020-08626-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
Prediction of dissolved organic carbon (DOC) based on catchment characteristics is a useful tool for efficient and effective water management, but in the case of arid and semi-arid regions, such predictive capacity is scarce. Accordingly, the main objective of this study was to evaluate the significance of principal components for predicting DOC concentrations and fluxes in nine headwater catchments of the Hiv catchment located in the Southern Alborz Mountains in the west of Tehran, Iran. To achieve this aim, data were assembled on 24 headwater catchment characteristics comprising soil properties, physiography, seasonal rainfall, and flow attributes, as well as estimates of DOC concentrations and fluxes across four seasons. The results revealed a major positive correlation between DOC and soil organic matter parameters related to soil biological processes. Using general linear modelling, an organic matter component related to soil biology, a seasonal component related to the dummy effect of sampling seasons, and a soil physical component related to soil texture were found to be the best predictors for DOC responses in the study area.
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Affiliation(s)
- Kazem Nosrati
- Department of Physical Geography, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, 1983969411, Iran.
| | - Adrian L Collins
- Sustainable Agriculture Sciences Department, Rothamsted Research, North Wyke, Okehampton, EX20 2SB, UK
| | - Peter Fiener
- Water and Soil Resources Research, Institut für Geographie, Universität Augsburg, Augsburg, Germany
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22
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The Response of Dissolved Organic Matter during Monsoon and Post-Monsoon Periods in the Regulated River for Sustainable Water Supply. SUSTAINABILITY 2020. [DOI: 10.3390/su12135310] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Dissolved organic matter (DOM) in rivers are an important factor in pollution management due to the abundance of stored carbon. Using fluorescent spectroscopy, we investigated the temporal and spatial dynamics of DOM compositions, as well as their properties, for two of the major four regulated rivers—Han River (HR) and Geum River (GR) in South Korea. We collected eight sampling sites, four from each of the two rivers (from close to the weirs) in order to observe the integrated effects of different land use (terrestrial input) during the monsoon (July) and post-monsoon periods (September). High integral values of DOM compositions (July: 30.81 ± 9.71 × 103 vs. September: 1.78 ± 0.66 × 103) were present in all eight sites after heavy rainfall during the monsoon period, which indicated that Asian monsoon climates occupy a potent role in the DOM compositions of the rivers. Regarding DOM compositions, tryptophan-like and fulvic acid-like components were predominant in HR and GR, especially in GR with high integral values of protein-like and humus components. However, the properties of terrestrial DOM between HR and GR are markedly different. These results considered due to the different land use, where the terrestrial DOM shows a low degree of humification due to a high percentage of agriculture and urban land use in GR. Furthermore, these two rivers are typical regulated rivers, due to their weir constructions. High values of DOM components were present in the downstream of the weirs; however, increasingly high patterns appeared in the HR because of heavy rainfall (511.01 mm in HR; 376.33 mm in GR). In addition, a lower increasing trend of humic-like component was present in the GR due to a low percentage of forest land use/cover. These results suggest that the effect of the weir on rivers can be highlighted by the different percentages of land use/cover under the conditions of the monsoon period. Hence, DOM fluorescence can serve as an effective indicator for providing an early signal for the complex impacts of the different land use and rainfall in the regulated river systems.
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23
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Strandberg U, Hiltunen M, Rissanen N, Taipale S, Akkanen J, Kankaala P. Increasing concentration of polyunsaturated fatty acids in browning boreal lakes is driven by nuisance alga
Gonyostomum. Ecosphere 2020. [DOI: 10.1002/ecs2.3189] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- Ursula Strandberg
- Department of Environmental and Biological Sciences University of Eastern Finland Joensuu Finland
| | - Minna Hiltunen
- Department of Environmental and Biological Sciences University of Eastern Finland Joensuu Finland
- Department of Biological and Environmental Science University of Jyväskylä Jyväskylä Finland
| | - Ninni Rissanen
- Department of Environmental and Biological Sciences University of Eastern Finland Joensuu Finland
| | - Sami Taipale
- Department of Biological and Environmental Science University of Jyväskylä Jyväskylä Finland
| | - Jarkko Akkanen
- Department of Environmental and Biological Sciences University of Eastern Finland Joensuu Finland
| | - Paula Kankaala
- Department of Environmental and Biological Sciences University of Eastern Finland Joensuu Finland
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24
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Ziouch OR, Laskri H, Chenaker H, Ledjedel NE, Daifallah T, Ounissi M. Transport of nutrients from the Seybouse River to Annaba Bay (Algeria, SW Mediterranean). MARINE POLLUTION BULLETIN 2020; 156:111231. [PMID: 32510377 DOI: 10.1016/j.marpolbul.2020.111231] [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: 09/21/2019] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 06/11/2023]
Abstract
Freshwater and dissolved nutrient inputs that entered the lower Seybouse River estuary were assessed in 2012 through a fortnightly surface water sampling both at a lower river station and at the estuary outlet. The Seybouse estuary delivered annually 950 × 106 m3 of freshwater yielding 83 kg N km-2 yr-1 of N-NH4 and 12 kg P km-2 yr-1 of P-PO4. More than 2/3 of the annual inputs of freshwater, Si(OH)4 and NO3 entered the sea during the flooding event of late February 2012. Si-Si(OH)4 and N-NO3 yields in the Seybouse estuary represented <1/3 those of the Mediterranean rivers. Annaba Bay is subjected to highly polluted waters from the Seybouse estuary, with significant NH4 (72 ± 37 μmol L-1) and PO4 (7 ± 4 μmol L-1) amounts. However it is characterized by low Si(OH)4 (104 ± 43 μmol L-1) amounts. Alteration of Si:N:P ratios at this bay suggest potential risk of eutrophication, except during and weeks after flood episodes.
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Affiliation(s)
- Omar Ramzi Ziouch
- Department of Ecology and Environment, Faculty of Science, Abbes Laghrour University, Khenchela, PO Box 1252, El Hamma 40004, Algeria; Laboratory of Biogeochemical and Ecological Analyses of Aquatic Environments, Department of Marine Science, Badji Mokhtar University, Annaba, PO Box 12, Sidi Ammar 23000, Algeria.
| | - Hadjer Laskri
- Laboratory of Biogeochemical and Ecological Analyses of Aquatic Environments, Department of Marine Science, Badji Mokhtar University, Annaba, PO Box 12, Sidi Ammar 23000, Algeria
| | - Houda Chenaker
- Department of Ecology and Environment, Faculty of Science, Abbes Laghrour University, Khenchela, PO Box 1252, El Hamma 40004, Algeria
| | - Nedjm Eddine Ledjedel
- Laboratory of Biogeochemical and Ecological Analyses of Aquatic Environments, Department of Marine Science, Badji Mokhtar University, Annaba, PO Box 12, Sidi Ammar 23000, Algeria
| | - Tarek Daifallah
- Department of Ecology and Environment, Faculty of Science, Abbes Laghrour University, Khenchela, PO Box 1252, El Hamma 40004, Algeria
| | - Makhlouf Ounissi
- Laboratory of Biogeochemical and Ecological Analyses of Aquatic Environments, Department of Marine Science, Badji Mokhtar University, Annaba, PO Box 12, Sidi Ammar 23000, Algeria
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25
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Praise S, Ito H, Sakuraba T, Pham DV, Watanabe T. Water extractable organic matter and iron in relation to land use and seasonal changes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 707:136070. [PMID: 31863986 DOI: 10.1016/j.scitotenv.2019.136070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/07/2019] [Accepted: 12/09/2019] [Indexed: 06/10/2023]
Abstract
The soil carbon pool is an essential part of the global carbon cycle although it is sensitive to climatic changes and the local environment. Terrestrial areas are important sources of organic matter for aquatic ecosystems and the fluctuation of different soil minerals and elements is largely influenced by land use and season changes. We studied water-extractable organic matter (WEOM) properties including iron (Fe), water extractable organic carbon (WEOC) and spectral characteristics from forests and arable soils to evaluate the effects of land use and seasonal change on WEOM and Fe in terrestrial areas. We collected soil samples randomly from arable land (AR), broadleaf (BL) and aged needle leaf forests (NL) and extracted WEOM for analysis using rainwater. Results of WEOC and Fe showed similar trend seasonally and were higher in forest sample than in AR. WEOC was high in the upper layer while Fe was independent of the depth and higher in AR. On the other hand, specific ultra-violet absorbance at 254 nm (SUVA254) and a proxy for aromaticity significantly varied with both land use and season and was on average two times higher in arable land than forests during spring and summer. Humic-like components significantly varied between the studied sites seasonally while tyrosine-like was affected by season only. The relative abundance of both humic-like and tryptophan-like components were significantly affected by land use while [Fe]: [WEOC] ratio was also high in arable land and negatively correlated with humic-like components in forest sites. As observed from ratio and Fe oxidation rate constant, summer presented ideal conditions for WEOM interactions. The synchronized seasonal WEOC and Fe changes indicate an enhancement of Fe mobility by DOM whereas the differences observed between sites especially from the high humic- and protein-like components in NL and BL reflects the effect of land use.
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Affiliation(s)
- Susan Praise
- Department of Food, Life and Environmental Sciences, Yamagata University, 1-23 Wakaba-machi, Tsuruoka, Yamagata 997-8555, Japan
| | - Hiroaki Ito
- Center for Water Cycle, Marine Environment and Disaster Management, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
| | - Takayuki Sakuraba
- Department of Food, Life and Environmental Sciences, Yamagata University, 1-23 Wakaba-machi, Tsuruoka, Yamagata 997-8555, Japan
| | - Dung Viet Pham
- Department of Food, Life and Environmental Sciences, Yamagata University, 1-23 Wakaba-machi, Tsuruoka, Yamagata 997-8555, Japan.
| | - Toru Watanabe
- Department of Food, Life and Environmental Sciences, Yamagata University, 1-23 Wakaba-machi, Tsuruoka, Yamagata 997-8555, Japan.
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26
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Kritzberg ES, Hasselquist EM, Škerlep M, Löfgren S, Olsson O, Stadmark J, Valinia S, Hansson LA, Laudon H. Browning of freshwaters: Consequences to ecosystem services, underlying drivers, and potential mitigation measures. AMBIO 2020; 49:375-390. [PMID: 31367885 PMCID: PMC6965042 DOI: 10.1007/s13280-019-01227-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/03/2019] [Accepted: 07/10/2019] [Indexed: 05/05/2023]
Abstract
Browning of surface waters, as a result of increasing dissolved organic carbon and iron concentrations, is a widespread phenomenon with implications to the structure and function of aquatic ecosystems. In this article, we provide an overview of the consequences of browning in relation to ecosystem services, outline what the underlying drivers and mechanisms of browning are, and specifically focus on exploring potential mitigation measures to locally counteract browning. These topical concepts are discussed with a focus on Scandinavia, but are of relevance also to other regions. Browning is of environmental concern as it leads to, e.g., increasing costs and risks for drinking water production, and reduced fish production in lakes by limiting light penetration. While climate change, recovery from acidification, and land-use change are all likely factors contributing to the observed browning, managing the land use in the hydrologically connected parts of the landscape may be the most feasible way to counteract browning of natural waters.
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Affiliation(s)
- Emma S. Kritzberg
- Biology Department, Lund University, Ecology Building, Sölvegatan 37, 223 62 Lund, Sweden
| | - Eliza Maher Hasselquist
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Skogsmarksgränd, 901 83 Umeå, Sweden
| | - Martin Škerlep
- Biology Department, Lund University, Ecology Building, Sölvegatan 37, 223 62 Lund, Sweden
| | - Stefan Löfgren
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), P.O. Box 7050, 750 07 Uppsala, Sweden
| | - Olle Olsson
- Stockholm Environment Institute, Linnégatan 87D, P.O. Box 242 18, 104 51 Stockholm, Sweden
| | - Johanna Stadmark
- IVL Svenska Miljöinstitutet, Box 530 21, 400 14 Göteborg, Sweden
| | | | - Lars-Anders Hansson
- Biology Department, Lund University, Ecology Building, Sölvegatan 37, 223 62 Lund, Sweden
| | - Hjalmar Laudon
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Skogsmarksgränd, 901 83 Umeå, Sweden
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27
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Rizinjirabake F, Abdi AM, Tenenbaum DE, Pilesjö P. Riverine dissolved organic carbon in Rukarara River Watershed, Rwanda. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 643:793-806. [PMID: 29958168 DOI: 10.1016/j.scitotenv.2018.06.194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 05/11/2018] [Accepted: 06/15/2018] [Indexed: 06/08/2023]
Abstract
Dissolved organic carbon (DOC) loading is rarely estimated in tropical watersheds. This study quantifies DOC loading in the Rukarara River Watershed (RRW), a Rwandan tropical forest and agricultural watershed, and evaluates its relationship with hydrological factors, land use and land cover (LULC), and topography to better understand the impact of stream DOC export on watershed carbon budgets. The annual average load for the study period was 977.80 kg C, which represents approximately 8.44% of the net primary productivity of the watershed. The mean daily exports were 0.37, 0.14, 0.075 and 0.32 kg C/m2 in streams located in natural forest, tea plantation, small farming areas, and at the outlet of the river, respectively. LULC is a factor that influences DOC loading. The quick flow was the main source of stream DOC at all study sites. Stream DOC increases with increasing water flow, indicating a positive relationship. Thus, the expectation is that a change in land cover and/or rainfall will result in a change of stream DOC dynamics within the watershed. Topography was also found to influence the dynamics of stream DOC through its effect on overland flow in terms of drainage area and total length of flow paths. Tea plantations were located in areas of high drainage density and projected increase of rainfall in the region, as a consequence of climate change, could increase stream DOC content and affect stream water quality, biodiversity, balance between autotrophy and heterotrophy, and bioavailability of toxic compounds within the RRW.
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Affiliation(s)
- Fabien Rizinjirabake
- Department of Physical Geography and Ecosystem Science, Lund University, Sweden; Department of Biology, College of Science and Technology, University of Rwanda, Rwanda.
| | - Abdulhakim M Abdi
- Department of Physical Geography and Ecosystem Science, Lund University, Sweden
| | - David E Tenenbaum
- Department of Physical Geography and Ecosystem Science, Lund University, Sweden
| | - Petter Pilesjö
- Department of Physical Geography and Ecosystem Science, Lund University, Sweden
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28
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Duval TP. Effect of residential development on stream phosphorus dynamics in headwater suburbanizing watersheds of southern Ontario, Canada. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 637-638:1241-1251. [PMID: 29801217 DOI: 10.1016/j.scitotenv.2018.04.437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 04/28/2018] [Accepted: 04/29/2018] [Indexed: 06/08/2023]
Abstract
Suburban landscapes are known to have degraded water quality relative to natural settings, including increased total phosphorus (TP) levels; however, the effect of subdivision construction activities on stream TP dynamics are less understood. This study measured TP and its constituents particulate, dissolved organic, and dissolved inorganic phosphorus (PP, DOP, and DIP, respectively) in two headwater streams of contrasting urbanization activity to examine whether the land-use conversion process itself contributed to TP concentrations and export. The nested watershed undergoing significant active residential community construction contained large areas of cleared former agricultural field and associated sediment mounds with elevated soil TP (~1000 mg kg-1), and twice as many stormwater management (SWM) ponds than the watershed with completed suburban communities. Daily stream sampling for six months revealed limited differences in TP between urbanized and urbanizing watersheds regardless of season or stream flow condition; however, the forms of TP varied significantly. The proportion of TP as DOP was consistently higher in the urbanizing stream relative to the urban stream, which was in line with significant decreases in DOP concentration as proportion of cleared former agricultural land decreased and density of SWM ponds increased. The DOP, and to a lesser extent DIP and PP, dynamics resulted in a 2.5× greater areal export of TP from a small watershed actively being suburbanized during the study period compared to the larger watershed with greater land urbanized 3-5 years ago. The results of this study suggest stream TP concentrations are relatively unresponsive to active versus established suburban cover, but the forms of TP can be quite different, and the period of home construction can increase phosphorus (P) delivery to and export through nearby streams. This information can aid land managers and urban planners update best management practices to mitigate the transfer of terrestrial P to the aquatic environment.
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Affiliation(s)
- Tim P Duval
- Department of Geography, University of Toronto Mississauga, 3359 Mississauga Rd, Mississauga, ON L5L 1C6, Canada.
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29
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Roebuck JA, Seidel M, Dittmar T, Jaffé R. Land Use Controls on the Spatial Variability of Dissolved Black Carbon in a Subtropical Watershed. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8104-8114. [PMID: 29940732 DOI: 10.1021/acs.est.8b00190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Rivers export roughly 250 Pg of dissolved organic carbon (DOC) to coastal oceans. DOC exported from rivers can be a reflection of watershed dynamics, and changes in land use can lead to shifts in the molecular composition and reactivity of riverine DOC. About 10% of DOC exported from rivers is dissolved black carbon (DBC), a collection of polycondensed aromatic compounds derived from the incomplete combustion of biomass and fossil fuels. While DOC and DBC export are generally coupled, the effects of watershed land use on DBC quality are not well understood. In this study, DBC samples were collected throughout the Altamaha River watershed in Georgia, USA. DBC was characterized using the benzenepoly(carboxylic acid) method and Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS). DBC had a more polycondensed character in areas of the watershed with less anthropogenic disturbance. Furthermore, FTICR-MS revealed that DBC became enriched with a lower molecular weight, heteroatomic signature in response to higher anthropogenic activity. As global land cover continues to change, this study demonstrates on a localized scale that watershed land use can influence the export and composition of DBC, which may have further implications for global carbon and nutrient cycling.
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Affiliation(s)
- J Alan Roebuck
- Southeast Environmental Research Center and Department of Chemistry and Biochemistry , Florida International University , Miami , Florida 33179 , United States
| | - Michael Seidel
- Research Group for Marine Geochemistry , Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg , D-26129 Oldenburg , Germany
| | - Thorsten Dittmar
- Research Group for Marine Geochemistry , Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg , D-26129 Oldenburg , Germany
| | - Rudolf Jaffé
- Southeast Environmental Research Center and Department of Chemistry and Biochemistry , Florida International University , Miami , Florida 33179 , United States
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30
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Manninen N, Soinne H, Lemola R, Hoikkala L, Turtola E. Effects of agricultural land use on dissolved organic carbon and nitrogen in surface runoff and subsurface drainage. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 618:1519-1528. [PMID: 29128120 DOI: 10.1016/j.scitotenv.2017.09.319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 09/29/2017] [Accepted: 09/29/2017] [Indexed: 05/28/2023]
Abstract
Dissolved organic carbon (DOC) load in discharges from cultivated soils may have negative impacts on surface waters. The magnitude of the load may vary according to soil properties or agricultural management practices. This study quantifies the DOC load of cultivated mineral soils and investigates whether the load is affected by agricultural practices. Discharge volumes and concentrations of DOC and dissolved organic nitrogen (DON) were continually measured at three sites from surface runoff and artificial subsurface drainage or from combined total discharge over a two-year period (2012-2014). Two experimental sites in South-West Finland had clayey soils (with soil carbon contents of 2.7-5.9% in the topmost soil layer), and the third site in West-Central Finland had sandy soil (soil carbon contents of 4.3-6.2%). Permanent grassland, organic manure application, mineral fertilization, and conventional ploughing or no-till activities were studied. Furthermore, the biodegradable DOC pool of surface runoff and subsurface drainage water from no-till and ploughed fields was estimated in a 2-month incubation experiment with natural bacterial communities collected from the Baltic Sea seawater. The annual DOC and DON loads were affected by discharge volume and seasonal weather conditions. The loads varied between 25-52kgha-1 and 0.8-3.2kgha-1, respectively, and were comparable to those from boreal forests with similar soil types. The DOC load increased with increasing topsoil carbon content at all sites. There were slightly higher DOC concentrations and DOC load from permanent grassland, but otherwise we could not distinguish any clear management-induced differences in the total DOC loads. While only 6-17% of the DOC in discharge water was biologically degraded during the 2-month incubation, the proportion of biodegradable (labile) DOC in surface runoff appeared to increase when soil was ploughed compared to no-till.
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Affiliation(s)
- Noora Manninen
- University of Helsinki, Environmental soil science, P.O. Box 56, FI-00014 University of Helsinki, Finland.
| | - Helena Soinne
- University of Helsinki, Environmental soil science, P.O. Box 56, FI-00014 University of Helsinki, Finland
| | - Riitta Lemola
- Natural resources institute Finland, Humppilantie, FI-31600 Jokioinen, Finland
| | - Laura Hoikkala
- University of Helsinki, P.O. Box 65, FI-00014 University of Helsinki, Finland; Marine Research Centre, Finnish Environment Institute, Mustialankatu 1, FI-00790 Helsinki, Finland
| | - Eila Turtola
- Natural resources institute Finland, Humppilantie, FI-31600 Jokioinen, Finland
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31
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Zhuang WE, Yang L. Impacts of global changes on the biogeochemistry and environmental effects of dissolved organic matter at the land-ocean interface: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:4165-4173. [PMID: 29255987 DOI: 10.1007/s11356-017-1027-6] [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: 02/23/2017] [Accepted: 12/12/2017] [Indexed: 06/07/2023]
Abstract
Dissolved organic matter (DOM) is an important component in the biogeochemistry and ecosystem function of aquatic environments at the highly populated land-ocean interface. The mobilization and transformation of DOM at this critical interface are increasingly affected by a series of notable global changes such as the increasing storm events, intense human activities, and accelerating glacier loss. This review provides an overview of the changes in the quantity and quality of DOM under the influences of multiple global changes. The profound implications of changing DOM for aquatic ecosystem and human society are further discussed, and future research needs are suggested for filling current knowledge gaps. The fluvial export of DOM is strongly intensified during storm events, which is accompanied with notable changes in the chemical composition and reactivity of DOM. Land use not only changes the mobilization of natural DOM source pools within watersheds but also adds DOM of distinct chemical composition and reactivity from anthropogenic sources. Glacier loss brings highly biolabile DOM to downstream water bodies. The changing DOM leads to significant changes in heterotrophic activity, CO2 out gassing, nutrient and pollutant biogeochemistry, and disinfection by-product formation. Further studies on the source, transformations, and downstream effects of storm DOM, temporal variations of DOM and its interactions with other pollutants in human-modified watersheds, photo-degradability of glacier DOM, and potential priming effects, are essential for better understanding the responses and feedbacks of DOM at the land-ocean interface under the impacts of global changes.
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Affiliation(s)
- Wan-E Zhuang
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, People's Republic of China
| | - Liyang Yang
- College of Environment and Resources, Fuzhou University, Fuzhou, Fujian, People's Republic of China.
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Sui X, Wu Z, Lin C, Zhou S. Terrestrially derived glomalin-related soil protein quality as a potential ecological indicator in a peri-urban watershed. ENVIRONMENTAL MONITORING AND ASSESSMENT 2017; 189:315. [PMID: 28589455 DOI: 10.1007/s10661-017-6012-5] [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: 08/19/2016] [Accepted: 05/21/2017] [Indexed: 06/07/2023]
Abstract
Glomalin, which sequesters substantial amounts of carbon, plays a critical role in sustaining terrestrial biome functions and contributes to the fate of many pollutants from terrestrial to aquatic ecosystems. Despite having focused on the amount of glomalin produced, very few attempts have been made to understand how landscapes and environmental conditions influence glomalin composition and characteristics. This study focused on glomalin-related soil protein (GRSP) exported as storm runoff including eroded sediment and water that was collected before flowing to surface waters in a peri-urban watershed. GRSP characteristics were assessed by Bradford protein analysis, fluorescence spectroscopy combined with parallel factor analysis (PARAFAC), and the determination of aromaticity based on the specific ultraviolet absorption value (280 nm) and molecular weight. General linear models (GLMs) was established by integrating microbial activity, land cover, water temperature, precipitation, and other solution chemical properties to explain the variations in GRSP characteristics. Results showed that a higher GRSP concentration in agricultural reference sites was produced in the form of specific materials with low molecular weight and aromaticity, as well as high percentage of C1 and C5 components which indicate microbial-processed sources, relative to urbanized and forested sites. Compared with forested land, urbanized land clearly produced runoff GRSP with low molecular weight and aromaticity, as well as more degradation of humic-like materials (C3 component). The highest GLM explaining 89% of the variables, including significant variables (p < 0.05) such as microbial activity, water temperature, and water conductivity, was observed for GRSP characteristics. Therefore, changes in eroded soil GRSP quality can serve as an indicator for improving watershed management and thus protecting aquatic ecosystems.
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Affiliation(s)
- Xueyan Sui
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210046, China
| | - Zhipeng Wu
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210046, China.
| | - Chen Lin
- Key Laboratory of Watershed Geographic Sciences, Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Shenglu Zhou
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210046, China.
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Ledesma JLJ, Futter MN, Blackburn M, Lidman F, Grabs T, Sponseller RA, Laudon H, Bishop KH, Köhler SJ. Towards an Improved Conceptualization of Riparian Zones in Boreal Forest Headwaters. Ecosystems 2017. [DOI: 10.1007/s10021-017-0149-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Raeke J, Lechtenfeld OJ, Tittel J, Oosterwoud MR, Bornmann K, Reemtsma T. Linking the mobilization of dissolved organic matter in catchments and its removal in drinking water treatment to its molecular characteristics. WATER RESEARCH 2017; 113:149-159. [PMID: 28213336 DOI: 10.1016/j.watres.2017.01.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 12/12/2016] [Accepted: 01/31/2017] [Indexed: 06/06/2023]
Abstract
Drinking water reservoirs in the Northern Hemisphere are largely affected by the decadal-long increase in riverine dissolved organic carbon (DOC) concentrations. The removal of DOC in drinking water treatment is costly and predictions are needed to link DOC removal efficiency to its mobilization in catchments, both of which are determined by the molecular composition. To study the effect of hydrological events and land use on the molecular characteristics of dissolved organic matter (DOM), 36 samples from three different catchment areas in the German low mountain ranges, with DOC concentrations ranging from 3 to 32 mg L-1, were examined. Additionally, nine pairs of samples from downstream drinking water reservoirs were analyzed before and after flocculation. The molecular composition and the age of DOM were analyzed using ultrahigh resolution Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) and radiocarbon (14C) analysis. At elevated discharge in a forested catchment comparatively younger, more oxygenated and unsaturated molecules of higher molecular weight were preferentially mobilized, likely linked to the reductive mobilization of iron. DOM with highly similar molecular characteristics (O/C ratio > 0.5, m/z > 500) could also be efficiently removed through flocculation in drinking water treatment. The proportion of DOM removed through flocculation ranged between 43% and 73% of DOC and was highest at elevated discharge. In catchment areas with a higher percentage of grassland and agriculture a higher proportion of DOM molecules containing sulfur and nitrogen was detected, which in turn could be less efficiently flocculated. Altogether, it was shown that DOM that is released during large hydrological events can be efficiently flocculated again, suggesting a reversal of similar chemical mechanisms in both processes. Since the occurrence of heavy rainfall events is predicted to increase in the future, event-driven mobilization of DOC may continue to challenge drinking water production.
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Affiliation(s)
- Julia Raeke
- Helmholtz Centre for Environmental Research - UFZ, Department of Analytical Chemistry, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Oliver J Lechtenfeld
- Helmholtz Centre for Environmental Research - UFZ, Department of Analytical Chemistry, Permoserstrasse 15, 04318 Leipzig, Germany; Helmholtz Centre for Environmental Research - UFZ, ProVIS - Centre for Chemical Microscopy, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Jörg Tittel
- Helmholtz Centre for Environmental Research - UFZ, Department of Lake Research, Brückstrasse 3a, 39114 Magdeburg, Germany
| | - Marieke R Oosterwoud
- Helmholtz Centre for Environmental Research - UFZ, Department of Hydrogeology, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Katrin Bornmann
- TZW: DVGW Water Technology Center, Wasserwerkstrasse 2, 01326 Dresden, Germany
| | - Thorsten Reemtsma
- Helmholtz Centre for Environmental Research - UFZ, Department of Analytical Chemistry, Permoserstrasse 15, 04318 Leipzig, Germany.
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35
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Awad J, van Leeuwen J, Chow CWK, Smernik RJ, Anderson SJ, Cox JW. Seasonal variation in the nature of DOM in a river and drinking water reservoir of a closed catchment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 220:788-796. [PMID: 27823862 DOI: 10.1016/j.envpol.2016.10.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 10/12/2016] [Accepted: 10/18/2016] [Indexed: 06/06/2023]
Abstract
Dissolved organic matter (DOM) in surface waters used for drinking purposes can vary markedly in character depending on its source within catchments and the timing and intensity of rainfall events. Here we report the findings of a study on the character and concentration of DOM in waters collected during different seasons from Myponga River and Reservoir, South Australia. The character of DOM was assessed in terms of its treatability by enhanced coagulation and potential for disinfection by-product i.e. trihalomethane (THM) formation. During the wet seasons (winter and spring), water samples from the river had higher DOC concentrations (X¯: 21 mg/L) and DOM of higher average molecular weight (AMW: 1526 Da) than waters collected during the dry seasons (summer and autumn: DOC: 13 mg/L; AMW: 1385 Da). Even though these features led to an increase in the percentage removal of organics by coagulation with alum (64% for wet compared with 53% for dry season samples) and a lower alum dose rate (10 versus 15 mg alum/mg DOC removal), there was a higher THM formation potential (THMFP) from wet season waters (treated waters: 217 μg/L vs 172 μg/L). For reservoir waters, samples collected during the wet seasons had an average DOC concentration (X¯: 15 mg/L), percentage removal of organics by alum (54%), alum dose rates (13 mg/mg DOC) and THMFP (treated waters: 207 μg/L) that were similar to samples collected during the dry seasons (mean DOC: 15 mg/L; removal of organics: 52%; alum dose rate: 13 mg/mg DOC; THMFP: 212 μg/L for treated waters). These results show that DOM present in river waters and treatability by alum are highly impacted by seasonal environmental variations. However these in reservoir waters exhibit less seasonal variability. Storage of large volumes of water in the reservoir enables mixing of influent waters and stabilization of water quality.
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Affiliation(s)
- John Awad
- School of Natural and Built Environments, University of South Australia, South Australia, 5095, Australia
| | - John van Leeuwen
- School of Natural and Built Environments, University of South Australia, South Australia, 5095, Australia; SKLEAC, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China.
| | - Christopher W K Chow
- School of Natural and Built Environments, University of South Australia, South Australia, 5095, Australia; Australian Water Quality Centre, SA Water Corporation, 250 Victoria Square, Adelaide, South Australia, 5000, Australia; SKLEAC, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China
| | - Ronald J Smernik
- School of Agriculture, Food & Wine and Waite Research Institute, The University of Adelaide, Urrbrae, South Australia, 5064, Australia
| | - Sharolyn J Anderson
- School of Natural and Built Environments, University of South Australia, South Australia, 5095, Australia
| | - Jim W Cox
- School of Biological Sciences, The University of Adelaide, North Terrace, South Australia, 5005, Australia; South Australian Research and Development Institute, Urrbrae, South Australia, 5064, Australia
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36
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Palviainen M, Laurén A, Launiainen S, Piirainen S. Predicting the export and concentrations of organic carbon, nitrogen and phosphorus in boreal lakes by catchment characteristics and land use: A practical approach. AMBIO 2016; 45:933-945. [PMID: 27250098 PMCID: PMC5102966 DOI: 10.1007/s13280-016-0789-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 03/31/2016] [Accepted: 04/27/2016] [Indexed: 05/12/2023]
Abstract
The majority of C, N and P in boreal lakes are in organic form. Organically bound nutrients are released through biodegradation or photodegradation which affects the water quality, eutrophication and greenhouse gas emissions of lakes. We tested whether open land-use data combined with land-use-specific export coefficients can be used to predict total organic carbon (TOC), dissolved organic nitrogen (DON) and dissolved organic phosphorus (DOP) loading and lake water concentrations. Using data from 12 lake catchments in eastern Finland, we found that land use and management of the catchment explained a substantial proportion of the variations in TOC (r 2 = 0.78), DON (r 2 = 0.55) and DOP (r 2 = 0.80) concentrations between lakes. The computation does not account for in-lake processes, which are reflected as mismatch between the predicted and observed concentrations. However, this simple practical approach is useful in ranking lakes according to their water quality. The results indicated that natural sources dominate TOC, DON and DOP exports; the background leachings accounted for 57-99 %, 48-96 % and 55-99 % of TOC, DON and DOP export, respectively. The proposed method has promise as a practical decision support tool for assessing the impacts of land use on water quality. The results showed that possibilities to control TOC, DON and DOP loading to surface waters are limited to catchments where the peatland proportion is low and anthropogenic sources significant.
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Affiliation(s)
- Marjo Palviainen
- Department of Forest Sciences, University of Helsinki, P.O. Box 27, 00014 Helsinki, Finland
| | - Ari Laurén
- Natural Resources Institute Finland (Luke), P.O. Box 68, 80101 Joensuu, Finland
| | - Samuli Launiainen
- Natural Resources Institute Finland (Luke), P.O. Box 18, 01301 Vantaa, Finland
| | - Sirpa Piirainen
- Natural Resources Institute Finland (Luke), P.O. Box 68, 80101 Joensuu, Finland
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37
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Strandberg U, Palviainen M, Eronen A, Piirainen S, Laurén A, Akkanen J, Kankaala P. Spatial variability of mercury and polyunsaturated fatty acids in the European perch (Perca fluviatilis) - Implications for risk-benefit analyses of fish consumption. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 219:305-314. [PMID: 27814547 DOI: 10.1016/j.envpol.2016.10.050] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 10/17/2016] [Indexed: 06/06/2023]
Abstract
This study evaluated the spatial variability of risks and benefits of consuming fish from humic and clear lakes. Mercury in fish is a potential risk for human health, but risk assessment may be confounded by selenium, which has been suggested to counterbalance mercury toxicity. In addition to the risks, fish are also rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are known to be beneficial for cardiovascular health and brain cognitive function in humans. We found that the concentrations of EPA + DHA and mercury in European perch (Perca fluviatilis) vary spatially and are connected with lake water chemistry and catchment characteristics. The highest mercury concentrations and the lowest EPA + DHA concentrations were found in perch from humic lakes with high proportion of peatland (30-50%) in the catchment. In addition, the ratio of selenium to mercury in perch muscle was ≥1 suggesting that selenium may counterbalance mercury toxicity. The observed variation in mercury and EPA + DHA content in perch from different lakes indicate that the risks and benefits of fish consumption vary spatially, and are connected with lake water chemistry and catchment characteristics. In general, consumption of perch from humic lakes exposed humans to greater risks (higher concentrations of mercury), but provided less benefits (lower concentrations of EPA + DHA) than consumption of perch from clear lakes.
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Affiliation(s)
- Ursula Strandberg
- University of Eastern Finland, Department of Environmental and Biological Sciences, Joensuu, Finland.
| | - Marjo Palviainen
- University of Helsinki, Department of Forest Sciences, Helsinki, Finland
| | - Aslak Eronen
- University of Eastern Finland, Department of Environmental and Biological Sciences, Joensuu, Finland
| | | | - Ari Laurén
- Natural Resources Institute Finland, Joensuu, Finland
| | - Jarkko Akkanen
- University of Eastern Finland, Department of Environmental and Biological Sciences, Joensuu, Finland
| | - Paula Kankaala
- University of Eastern Finland, Department of Environmental and Biological Sciences, Joensuu, Finland
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38
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Taipale SJ, Galloway AWE, Aalto SL, Kahilainen KK, Strandberg U, Kankaala P. Terrestrial carbohydrates support freshwater zooplankton during phytoplankton deficiency. Sci Rep 2016; 6:30897. [PMID: 27510848 PMCID: PMC4980614 DOI: 10.1038/srep30897] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 07/10/2016] [Indexed: 11/09/2022] Open
Abstract
Freshwater food webs can be partly supported by terrestrial primary production, often deriving from plant litter of surrounding catchment vegetation. Although consisting mainly of poorly bioavailable lignin, with low protein and lipid content, the carbohydrates from fallen tree leaves and shoreline vegetation may be utilized by aquatic consumers. Here we show that during phytoplankton deficiency, zooplankton (Daphnia magna) can benefit from terrestrial particulate organic matter by using terrestrial-origin carbohydrates for energy and sparing essential fatty acids and amino acids for somatic growth and reproduction. Assimilated terrestrial-origin fatty acids from shoreline reed particles exceeded available diet, indicating that Daphnia may convert a part of their dietary carbohydrates to saturated fatty acids. This conversion was not observed with birch leaf diets, which had lower carbohydrate content. Subsequent analysis of 21 boreal and subarctic lakes showed that diet of herbivorous zooplankton is mainly based on high-quality phytoplankton rich in essential polyunsaturated fatty acids. The proportion of low-quality diets (bacteria and terrestrial particulate organic matter) was <28% of the assimilated carbon. Taken collectively, the incorporation of terrestrial carbon into zooplankton was not directly related to the concentration of terrestrial organic matter in experiments or lakes, but rather to the low availability of phytoplankton.
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Affiliation(s)
- Sami J Taipale
- Lammi Biological Station, University of Helsinki, Pääjärventie 320, FIN-16900 Lammi, Finland.,Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland
| | - Aaron W E Galloway
- Oregon Institute of Marine Biology, University of Oregon, P.O. Box 5389, Charleston, Oregon, USA
| | - Sanni L Aalto
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35 (YA), 40014 Jyväskylä, Finland
| | - Kimmo K Kahilainen
- Kilpisjärvi Biological Station, University of Helsinki, Käsivarrentie 14622, FIN-99490 Kilpisjärvi, Finland.,Department of Environmental Sciences, University of Helsinki, P.O. Box 65, 00014 University of Helsinki, Finland
| | - Ursula Strandberg
- Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland
| | - Paula Kankaala
- Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland
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Awad J, van Leeuwen J, Chow C, Drikas M, Smernik RJ, Chittleborough DJ, Bestland E. Characterization of dissolved organic matter for prediction of trihalomethane formation potential in surface and sub-surface waters. JOURNAL OF HAZARDOUS MATERIALS 2016; 308:430-439. [PMID: 26874432 DOI: 10.1016/j.jhazmat.2016.01.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/01/2016] [Accepted: 01/12/2016] [Indexed: 06/05/2023]
Abstract
Dissolved organic matter (DOM) in surface waters used for drinking purposes can vary markedly in character dependent on their sources within catchments. The character of DOM further influences the formation of disinfection by products when precursor DOM present in drinking water reacts with chlorine during disinfection. Here we report the development of models that describe the formation potential of trihalomethanes (THMFP) dependent on the character of DOM in waters from discrete catchments with specific land-use and soil textures. DOM was characterized based on UV absorbance at 254 nm, apparent molecular weight and relative abundances of protein-like and humic-like compounds. DOM character and Br concentration (up to 0.5 mg/L) were used as variables in models (R(2)>0.93) of THMFP, which ranged from 19 to 649 μg/L. Chloroform concentration (12-594 μg/L) and relative abundance (27-99%) were first modeled (R(2)>0.85) and from these, the abundances of bromodichloromethane and chlorodibromomethane estimated using power and exponential functions, respectively (R(2)>0.98). From these, the abundance of bromoform is calculated. The proposed model may be used in risk assessment of catchment factors on formation of trihalomethanes in drinking water, in context of treatment efficiency for removal of organic matter.
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Affiliation(s)
- John Awad
- Natural & Built Environments Research Centre, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia
| | - John van Leeuwen
- Natural & Built Environments Research Centre, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia; SKLEAC, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
| | - Christopher Chow
- Natural & Built Environments Research Centre, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia; Australian Water Quality Centre, SA Water Corporation, 250 Victoria Square, Adelaide, South Australia 5000, Australia; SKLEAC, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
| | - Mary Drikas
- Natural & Built Environments Research Centre, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia; Australian Water Quality Centre, SA Water Corporation, 250 Victoria Square, Adelaide, South Australia 5000, Australia; SKLEAC, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
| | - Ronald J Smernik
- School of Agriculture, Food & Wine and Waite Research Institute, The University of Adelaide, Urrbrae, South Australia 5064, Australia
| | - David J Chittleborough
- School of Physical Sciences, The University of Adelaide, North Terrace, South Australia 5005, Australia
| | - Erick Bestland
- School of the Environment, Flinders University, Bedford Park, Adelaide, South Australia 5042, Australia
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Gücker B, Silva RCS, Graeber D, Monteiro JAF, Boëchat IG. Urbanization and agriculture increase exports and differentially alter elemental stoichiometry of dissolved organic matter (DOM) from tropical catchments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 550:785-792. [PMID: 26849342 DOI: 10.1016/j.scitotenv.2016.01.158] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 01/24/2016] [Accepted: 01/24/2016] [Indexed: 06/05/2023]
Abstract
Many tropical biomes are threatened by rapid land-use change, but its catchment-wide biogeochemical effects are poorly understood. The few previous studies on DOM in tropical catchments suggest that deforestation and subsequent land use increase stream water dissolved organic carbon (DOC) concentrations, but consistent effects on DOM elemental stoichiometry have not yet been reported. Here, we studied stream water DOC concentrations, catchment DOC exports, and DOM elemental stoichiometry in 20 tropical catchments at the Cerrado-Atlantic rainforest transition, dominated by natural vegetation, pasture, intensive agriculture, and urban land cover. Streams draining pasture could be distinguished from those draining natural catchments by their lower DOC concentrations, with lower DOM C:N and C:P ratios. Catchments with intensive agriculture had higher DOC exports and lower DOM C:P ratios than natural catchments. Finally, with the highest DOC concentrations and exports, as well as the highest DOM C:P and N:P ratios, but the lowest C:N ratios among all land-use types, urbanized catchments had the strongest effects on catchment DOM. Thus, urbanization may have alleviated N limitation of heterotrophic DOM decomposition, but increased P limitation. Land use-especially urbanization-also affected the seasonality of catchment biogeochemistry. While natural catchments exhibited high DOC exports and concentrations, with high DOM C:P ratios in the rainy season only, urbanized catchments had high values in these variables throughout the year. Our results suggest that urbanization and pastoral land use exerted the strongest impacts on DOM biogeochemistry in the investigated tropical catchments and should thus be important targets for management and mitigation efforts.
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Affiliation(s)
- Björn Gücker
- Applied Limnology Laboratory, Federal University of São João del-Rei, São João del-Rei, Brazil.
| | - Ricky C S Silva
- Applied Limnology Laboratory, Federal University of São João del-Rei, São João del-Rei, Brazil
| | | | - José A F Monteiro
- Applied Limnology Laboratory, Federal University of São João del-Rei, São João del-Rei, Brazil
| | - Iola G Boëchat
- Applied Limnology Laboratory, Federal University of São João del-Rei, São João del-Rei, Brazil
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41
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Autio I, Soinne H, Helin J, Asmala E, Hoikkala L. Effect of catchment land use and soil type on the concentration, quality, and bacterial degradation of riverine dissolved organic matter. AMBIO 2016; 45:331-49. [PMID: 26596969 PMCID: PMC4815755 DOI: 10.1007/s13280-015-0724-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 09/29/2015] [Accepted: 10/19/2015] [Indexed: 05/12/2023]
Abstract
We studied the effects of catchment characteristics (soil type and land use) on the concentration and quality of dissolved organic matter (DOM) in river water and on the bacterial degradation of terrestrial DOM. The share of organic soil was the strongest predictor of high concentrations of dissolved organic carbon, nitrogen, and phosphorus (DOC, DON, and DOP, respectively), and was linked to DOM quality. Soil type was more important than land use in determining the concentration and quality of riverine DOM. On average, 5-9 % of the DOC and 45 % of the DON were degraded by the bacterial communities within 2-3 months. Simultaneously, the proportion of humic-like compounds in the DOM pool increased. Bioavailable DON accounted for approximately one-third of the total bioavailable dissolved nitrogen, and thus, terrestrial DON can markedly contribute to the coastal plankton dynamics and support the heterotrophic food web.
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Affiliation(s)
- Iida Autio
- Department of Environmental Sciences, University of Helsinki, P.O. Box 65, 00014, Helsinki, Finland.
| | - Helena Soinne
- Department of Food and Environmental Sciences, University of Helsinki, P.O. Box 27, 00014, Helsinki, Finland.
| | - Janne Helin
- Luke (Natural Resources Institute Finland), Latokartanonkaari 9, 00790, Helsinki, Finland.
| | - Eero Asmala
- Department of Bioscience, Aarhus University, Frederiksborgvej 399, 4000, Roskilde, Denmark.
| | - Laura Hoikkala
- SYKE Marine Research Laboratory, Erik Palménin aukio 1, 00560, Helsinki, Finland.
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42
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Wagner S, Riedel T, Niggemann J, Vähätalo AV, Dittmar T, Jaffé R. Linking the Molecular Signature of Heteroatomic Dissolved Organic Matter to Watershed Characteristics in World Rivers. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:13798-13806. [PMID: 26153846 DOI: 10.1021/acs.est.5b00525] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Large world rivers are significant sources of dissolved organic matter (DOM) to the oceans. Watershed geomorphology and land use can drive the quality and reactivity of DOM. Determining the molecular composition of riverine DOM is essential for understanding its source, mobility and fate across landscapes. In this study, DOM from the main stem of 10 global rivers covering a wide climatic range and land use features was molecularly characterized via ultrahigh-resolution Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). FT-ICR mass spectral data revealed an overall similarity in molecular components among the rivers. However, when focusing specifically on the contribution of nonoxygen heteroatomic molecular formulas (CHON, CHOS, CHOP, etc.) to the bulk molecular signature, patterns relating DOM composition and watershed land use became apparent. Greater abundances of N- and S-containing molecular formulas were identified as unique to rivers influenced by anthropogenic inputs, whereas rivers with primarily forested watersheds had DOM signatures relatively depleted in heteroatomic content. A strong correlation between cropland cover and dissolved black nitrogen was established when focusing specifically on the pyrogenic class of compounds. This study demonstrated how changes in land use directly affect downstream DOM quality and could impact C and nutrient cycling on a global scale.
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Affiliation(s)
- Sasha Wagner
- Florida International University , Southeast Environmental Research Center and Department of Chemistry and Biochemistry, Biscayne Bay Campus, North Miami, Florida 33181, United States
| | - Thomas Riedel
- Carl von Ossietzky University of Oldenburg , Institute for Chemistry and Biology of the Marine Environment, Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), 26129 Oldenburg, Germany
| | - Jutta Niggemann
- Carl von Ossietzky University of Oldenburg , Institute for Chemistry and Biology of the Marine Environment, Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), 26129 Oldenburg, Germany
| | - Anssi V Vähätalo
- University of Jyväskylä , Department of Biological and Environmental Sciences, 40500 Jyväskylä, Finland
| | - Thorsten Dittmar
- Carl von Ossietzky University of Oldenburg , Institute for Chemistry and Biology of the Marine Environment, Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), 26129 Oldenburg, Germany
| | - Rudolf Jaffé
- Florida International University , Southeast Environmental Research Center and Department of Chemistry and Biochemistry, Biscayne Bay Campus, North Miami, Florida 33181, United States
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43
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Awad J, van Leeuwen J, Abate D, Pichler M, Bestland E, Chittleborough DJ, Fleming N, Cohen J, Liffner J, Drikas M. The effect of vegetation and soil texture on the nature of organics in runoff from a catchment supplying water for domestic consumption. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 529:72-81. [PMID: 26005751 DOI: 10.1016/j.scitotenv.2015.05.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 02/17/2015] [Accepted: 05/08/2015] [Indexed: 06/04/2023]
Abstract
The influence of vegetation and soil texture on the concentration and character of dissolved organic matter (DOM) present in runoff from the surface and sub-surface of zero order catchments of the Myponga Reservoir-catchment (South Australia) was investigated to determine the impacts of catchment characteristics and land management practices on the quality of waters used for domestic supply. Catchments selected have distinct vegetative cover (grass, native vegetation or pine) and contrasting texture of the surface soil horizon (sand or clay loam/clay). Water samples were collected from three slope positions (upper, middle, and lower) at soil depths of ~30 cm and ~60 cm in addition to overland flows. Filtered (0.45 μm) water samples were analyzed for dissolved organic carbon (DOC) and UV-visible absorbance and by F-EEM and HPSEC with UV and fluorescence detection to characterize the DOM. Surface and sub-surface runoff from catchments with clay soils and native vegetation or grass had lower DOC concentrations and lower relative abundances of aromatic, humic-like and high molecular weight organics than runoff from sandy soils with these vegetative types. Sub-surface flows from two catchments with Pinus radiata had similar DOC concentrations and DOM character, regardless of marked variation in surface soil texture. Runoff from catchments under native vegetation and grass on clay soils resulted in lower DOC concentrations and hence would be expected to have lower coagulant demand in conventional treatment for potable water supply than runoff from corresponding sandy soil catchments. However, organics in runoff from clay catchments would be more difficult to remove by coagulation. Surface waters from the native vegetation and grass catchments were generally found to have higher relative abundance of organic compounds amenable to removal by coagulation compared with sub-surface waters. Biophysical and land management practices combine to have a marked influence on the quality of source water used for domestic supply.
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Affiliation(s)
- John Awad
- Centre for Water Management and Reuse, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia
| | - John van Leeuwen
- Centre for Water Management and Reuse, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia; State Key Laboratory for Environmental Aquatic Chemistry, CAS, Beijing, China; Barbara Hardy Institute, University of South Australia, South Australia 5095, Australia.
| | - Dawit Abate
- Centre for Water Management and Reuse, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia
| | - Markus Pichler
- School of the Environment, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Erick Bestland
- School of the Environment, Flinders University, Bedford Park, South Australia 5042, Australia
| | - David J Chittleborough
- School of Physical Sciences, University of Adelaide, North Terrace, South Australia 5005, Australia
| | - Nigel Fleming
- South Australian Research and Development Institute, P.O. Box 397, Adelaide, SA 5000, Australia
| | - Jonathan Cohen
- Centre for Water Management and Reuse, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia
| | - Joel Liffner
- Centre for Water Management and Reuse, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia
| | - Mary Drikas
- Centre for Water Management and Reuse, School of Natural and Built Environments, University of South Australia, South Australia 5095, Australia; Australian Water Quality Centre, SA Water Corporation, 250 Victoria Square, Adelaide, South Australia 5000, Australia; State Key Laboratory for Environmental Aquatic Chemistry, CAS, Beijing, China
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Tzortziou M, Zeri C, Dimitriou E, Ding Y, Jaffé R, Anagnostou E, Pitta E, Mentzafou A. Colored dissolved organic matter dynamics and anthropogenic influences in a major transboundary river and its coastal wetland. LIMNOLOGY AND OCEANOGRAPHY 2015; 60:1222-1240. [PMID: 27656002 PMCID: PMC5014288 DOI: 10.1002/lno.10092] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 03/08/2015] [Accepted: 02/28/2015] [Indexed: 05/25/2023]
Abstract
Most transboundary rivers and their wetlands are subject to considerable anthropogenic pressures associated with multiple and often conflicting uses. In the Eastern Mediterranean such systems are also particularly vulnerable to climate change, posing additional challenges for integrated water resources management. Comprehensive measurements of the optical signature of colored dissolved organic matter (CDOM) were combined with measurements of river discharges and water physicochemical and biogeochemical properties, to assess carbon dynamics, water quality, and anthropogenic influences in a major transboundary system of the Eastern Mediterranean, the Evros (or, Марица or, Meriç) river and its Ramsar protected coastal wetland. Measurements were performed over three years, in seasons characterized by different hydrologic conditions and along transects extending more than 70 km from the freshwater end-member to two kilometers offshore in the Aegean Sea. Changes in precipitation, anthropogenic dissolved organic matter (DOM) inputs from the polluted Ergene tributary, and the irregular operation of a dam were key factors driving water quality, salinity regimes, and biogeochemical properties in the Evros delta and coastal waters. Marsh outwelling affected coastal carbon quality, but the influence of wetlands was often masked by anthropogenic DOM contributions. A distinctive five-peak CDOM fluorescence signature was characteristic of upstream anthropogenic inputs and clearly tracked the influence of freshwater discharges on water quality. Monitoring of this CDOM fluorescence footprint could have direct applications to programs focusing on water quality and environmental assessment in this and other transboundary rivers where management of water resources remains largely ineffective.
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Affiliation(s)
- Maria Tzortziou
- Department of Earth and Atmospheric Sciences The City College of New York City University of New York New York New York
| | - Christina Zeri
- Institute of Oceanography Hellenic Center for Marine Research Anavyssos Greece
| | - Elias Dimitriou
- Institute of Marine Biological Resources and Inland Waters Hellenic Center for Marine Research Anavyssos Greece
| | - Yan Ding
- Southeast Environmental Research Center and Department of Chemistry and Biochemistry Florida International University Miami Florida
| | - Rudolf Jaffé
- Southeast Environmental Research Center and Department of Chemistry and Biochemistry Florida International University Miami Florida
| | - Emmanouil Anagnostou
- Department of Civil and Environmental Engineering University of Connecticut Storrs Connecticut
| | - Elli Pitta
- Southeast Environmental Research Center and Department of Chemistry and Biochemistry Florida International University Miami Florida
| | - Angeliki Mentzafou
- Institute of Marine Biological Resources and Inland Waters Hellenic Center for Marine Research Anavyssos Greece
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45
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Mattsson T, Kortelainen P, Räike A, Lepistö A, Thomas DN. Spatial and temporal variability of organic C and N concentrations and export from 30 boreal rivers induced by land use and climate. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 508:145-54. [PMID: 25555556 DOI: 10.1016/j.scitotenv.2014.11.091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 11/25/2014] [Accepted: 11/27/2014] [Indexed: 05/15/2023]
Abstract
Climate change scenarios for northern boreal regions indicate that there will be increasing temperature and precipitation, and the changes are expected to be larger in winter than in summer. These precipitation and discharge patterns, coupled with shorter ice cover/soil frost periods in the future would be expected to contribute significantly to changing flow paths of organic matter over a range of land use patterns. In order to study the impact of climate change on the seasonality of organic matter export we compared total organic carbon (TOC) and total organic nitrogen (TON) concentrations and export, during different seasons and climatically different years, over 12 years for 30 Finnish rivers separated into forest, agriculture and peat dominated catchments. The mean monthly TOC concentrations were highest during autumn and there was also a peak in May during the highest flow period. The mean monthly concentrations of TON were lowest during winter, increased in spring and remaining high throughout summer and autumn. The TOC/TON ratios were lowest during summer and highest during winter, and in all seasons the ratios were lowest in catchments with a high proportion of agricultural land and highest in peat-dominated catchments. The seasonality of TOC and TON exports reflected geographical location, hydrology and land use patterns. Most of the TOC and TON were transported during the high flow following the spring snowmelt and during rainfall in autumn. In all catchments the relative importance of the spring snowmelt decreased in wet and warm years. However, in peat-dominated catchments the proportion of spring period was over 30% of the annual export even in these wet and warm years, while in other catchments the proportion was about 20%. This might be linked to the northern location of the peat-dominated catchments and the permanent snow cover and spring snowmelt, even in warm years.
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Affiliation(s)
- Tuija Mattsson
- Finnish Environment Institute (SYKE), P.O. Box 140, FI-00251 Helsinki, Finland.
| | - Pirkko Kortelainen
- Finnish Environment Institute (SYKE), P.O. Box 140, FI-00251 Helsinki, Finland
| | - Antti Räike
- Finnish Environment Institute (SYKE), P.O. Box 140, FI-00251 Helsinki, Finland
| | - Ahti Lepistö
- Finnish Environment Institute (SYKE), P.O. Box 140, FI-00251 Helsinki, Finland
| | - David N Thomas
- Finnish Environment Institute (SYKE), P.O. Box 140, FI-00251 Helsinki, Finland; School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, UK
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Heinz M, Graeber D, Zak D, Zwirnmann E, Gelbrecht J, Pusch MT. Comparison of organic matter composition in agricultural versus forest affected headwaters with special emphasis on organic nitrogen. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:2081-2090. [PMID: 25594834 DOI: 10.1021/es505146h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Agricultural management practices promote organic matter (OM) turnover and thus alter both the processing of dissolved organic matter (DOM) in soils and presumably also the export of DOM to headwater streams, which intimately connect the terrestrial with the aquatic environment. Size-exclusion chromatography, in combination with absorbance and emission matrix fluorometry, was applied to assess how agricultural land use alters the amount and composition of DOM, as well as dissolved organic nitrogen (DON) forms in headwater streams, including temporal variations, in a temperate region of NE Germany. By comparing six agriculturally and six forest-impacted headwater streams, we demonstrated that agriculture promotes increased DOC and DON concentrations, entailing an even more pronounced effect on DON. The major part of DOC and DON in agricultural and forest reference streams is exported in the form of humic-like material with high molecular weight, which indicates terrestrial, i.e., allochthonous sources. As an obvious difference in agricultural streams, the contribution of DOC and particularly DON occurring in the form of nonhumic high-molecular-weight, presumably proteinous material is clearly elevated. Altogether, DOM in agricultural headwaters is mainly complex-soil-derived and aromatic material with a low C:N ratio, which is more microbial processed than its counterpart from forest reference catchments. Our results emphasize the importance of agricultural land use on DOM loss from soils and identify agricultural soils as important DOC and particularly DON sources to headwater streams.
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Affiliation(s)
- Marlen Heinz
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries , Müggelseedamm 301, 12587 Berlin, Germany
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47
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Guo Y, Song C, Wan Z, Tan W, Lu Y, Qiao T. Effects of long-term land use change on dissolved carbon characteristics in the permafrost streams of northeast China. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2014; 16:2496-2506. [PMID: 25287902 DOI: 10.1039/c4em00283k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Permafrost soils act as large sinks of organic carbon but are highly sensitive to interference such as changes in land use, which can greatly influence dissolved carbon loads in streams. This study examines the effects of long-term land reclamation on seasonal concentrations of dissolved carbons in the upper reaches of the Nenjiang River, northeast China. A comparison of streams in natural and agricultural systems shows that the dissolved organic carbon (DOC) concentration is much lower in the agricultural stream (AG) than in the two natural streams (WAF, wetland dominated; FR, forest dominated), suggesting that land use change is associated with reduced DOC exporting capacity. Moreover, the fluorescence indexes and the ratio of dissolved carbon to nitrogen also differ greatly between the natural and agricultural streams, indicating that the chemical characteristics and the origin of the DOC released from the whole reaches are also altered to some extent. Importantly, the exporting concentration of dissolved inorganic carbon (DIC) and its proportion of total dissolved carbon (TDC) substantially increase following land reclamation, which would largely alter the carbon cycling processes in the downstream fluvial system. Although the strong association between the stream discharge and the DOC concentration was unchanged, the reduction in total soil organic carbon following land reclamation led to remarkable decline of the total flux and exporting coefficient of the dissolved carbons. The results suggest that dissolved carbons in permafrost streams have been greatly affected by changes in land use since the 1970s, and the changes in the concentration and chemical characteristics of dissolved carbons will last until the alteration in both the traditional agriculture pattern and the persistent reclamation activities.
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Affiliation(s)
- Yuedong Guo
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China.
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48
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Trends in Levels of Allochthonous Dissolved Organic Carbon in Natural Water: A Review of Potential Mechanisms under a Changing Climate. WATER 2014. [DOI: 10.3390/w6102862] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Relationships Between Land Cover and Dissolved Organic Matter Change Along the River to Lake Transition. Ecosystems 2014. [DOI: 10.1007/s10021-014-9804-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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50
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Glendell M, Brazier RE. Accelerated export of sediment and carbon from a landscape under intensive agriculture. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 476-477:643-656. [PMID: 24503335 DOI: 10.1016/j.scitotenv.2014.01.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 01/15/2014] [Accepted: 01/15/2014] [Indexed: 06/03/2023]
Abstract
The export of total organic carbon (particulate and dissolved) from terrestrial to aquatic ecosystems has important implications for water quality and the global carbon cycle. However, most research to date has focused on DOC losses from either forested or peaty catchments, with only limited studies examining the controls and rates of total fluvial carbon losses from agricultural catchments, particularly during storm events. This study examined the controls and fluxes of total suspended sediment (SS), total particulate (TPC) and dissolved organic carbon (DOC) from two adjacent catchments with contrasting intensive agricultural and semi-natural land-use. Data from 35 individual storm events showed that the agricultural catchment exported significantly higher SS concentrations on a storm-by-storm basis than the semi-natural catchment, with peak discharge exerting a greater control over SS, TPC and DOC concentrations. Baseflow DOC concentrations in the agricultural catchment were significantly higher. DOC quality monitored during one simultaneous rainfall event differed between the two study catchments, with more humic, higher molecular weight compounds prevailing in the agricultural catchment and lower molecular weight compounds prevailing in the semi-natural catchment. During an eight month period for which a comparable continuous turbidity record was available, the estimated SS yields from the agricultural catchment were higher than from the semi-natural catchment. Further, the agricultural catchment exported proportionally more TPC and a comparable amount of DOC, despite a lower total soil carbon pool. These results suggest that altered hydrological and biogeochemical processes within the agricultural catchment, including accelerated soil erosion and soil organic matter turnover, contributed to an enhanced fluvial SS and carbon export. Thus, we argue that enhancing semi-natural vegetation within intensively farmed catchments could reduce sediment and carbon losses from these areas and increase their resilience to more extreme hydrological events, anticipated as a result of climate change.
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Affiliation(s)
- M Glendell
- Geography, College of Life and Environmental Sciences, Amory Building, Rennes Drive, Exeter, Devon EX4 4RJ, United Kingdom.
| | - R E Brazier
- Geography, College of Life and Environmental Sciences, Amory Building, Rennes Drive, Exeter, Devon EX4 4RJ, United Kingdom.
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