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Kumblad L, Petersson M, Aronsson H, Dinnétz P, Norberg L, Winqvist C, Rydin E, Hammer M. Managing multi-functional peri-urban landscapes: Impacts of horse-keeping on water quality. AMBIO 2024; 53:452-469. [PMID: 37973703 PMCID: PMC10837409 DOI: 10.1007/s13280-023-01955-9] [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: 05/04/2023] [Revised: 09/25/2023] [Accepted: 10/16/2023] [Indexed: 11/19/2023]
Abstract
Eutrophication assessments in water management to quantify nutrient loads and identify mitigating measures seldom include the contribution from horse facilities. This may be due to lack of appropriate methods, limited resources, or the belief that the impact from horses is insignificant. However, the recreational horse sector is growing, predominantly in multi-functional peri-urban landscapes. We applied an ecosystem management approach to quantify nutrient loads from horse facilities in the Stockholm Region, Sweden. We found that horses increased the total loads with 30-40% P and 20-45% N, with average area-specific loads of 1.2 kg P and 7.6 kg N ha-1 year-1. Identified local risk factors included manure management practices, trampling severity, soil condition and closeness to water. Comparisons of assessment methods showed that literature standard values of area-specific loads and water runoff may be sufficient at the catchment level, but in small and more complex catchments, measurements and local knowledge are needed.
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Affiliation(s)
- Linda Kumblad
- Baltic Sea Center, Stockholm University, 106 91, Stockholm, Sweden.
| | - Mona Petersson
- School of Natural Science, Technology, and Environmental Studies, Department of Sustainability, Environment, and Global Development, Södertörn University, 141 89, Huddinge, Sweden
| | - Helena Aronsson
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Box 7014, 750 07, Uppsala, Sweden
| | - Patrik Dinnétz
- School of Natural Science, Technology, and Environmental Studies, Department of Sustainability, Environment, and Global Development, Södertörn University, 141 89, Huddinge, Sweden
| | - Lisbet Norberg
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Box 7014, 750 07, Uppsala, Sweden
| | | | - Emil Rydin
- Baltic Sea Center, Stockholm University, 106 91, Stockholm, Sweden
| | - Monica Hammer
- School of Natural Science, Technology, and Environmental Studies, Department of Sustainability, Environment, and Global Development, Södertörn University, 141 89, Huddinge, Sweden
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2
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Kanuri VV, Muduli PR, Robin RS, Basuri CK, Avvari L, Patra S, Gupta GVM, Gollapalli NR, Subramanian BR. Ecosystem-scale insights into the dynamics of dissolved organic matter in an Asia's largest brackish water lagoon: Sources, fluxes, and biogeochemical significance. MARINE POLLUTION BULLETIN 2024; 200:116135. [PMID: 38359482 DOI: 10.1016/j.marpolbul.2024.116135] [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: 09/18/2023] [Revised: 01/30/2024] [Accepted: 02/05/2024] [Indexed: 02/17/2024]
Abstract
A twenty-four month long observational study conducted in an Asia's largest brackish water ecosystem, Chilika Lagoon, India, aimed to unravel dissolved organic matter (DOM) dynamics in this tropical brackish water ecosystem. The study assessed the interplay between allochthonous and autochthonous DOM sources during lean and active flow periods based on regional rainfall. Dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) fluxes were analyzed, considering catchment runoff, phytoplankton production, benthic-pelagic interactions, and sea-lagoon exchanges as contributors. Contrary to conventional thinking, the study found autochthonous processes to be more significant than conservative mixing in shaping DOM dynamics. It introduced a novel conceptual model illustrating the multifaceted origins of DOM, encompassing catchment runoff, phytoplankton, benthic-pelagic interactions, bacterial activity, and sea-lagoon exchanges. These findings underscore the importance of holistic management strategies for Chilika Lagoon to preserve its ecological health, given its vital role in global carbon cycling, fisheries, and aquaculture.
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Affiliation(s)
- Vishnu Vardhan Kanuri
- Namami Gange Program, Central Pollution Control Board, Regional Directorate, MoEF&CC, Kolkata, India.
| | | | - R S Robin
- National Centre for Sustainable Coastal Management, MoEF&CC, Chennai, India
| | | | - Lovaraju Avvari
- Marine Biological Laboratory, Andhra University, Visakhapatnam, India
| | - Sivaji Patra
- National Centre for Coastal Research, MoES, Chennai, India
| | - G V M Gupta
- Centre for Marine Living Resource and Ecology, Kochi, India
| | | | - B R Subramanian
- National Centre for Sustainable Coastal Management, MoEF&CC, Chennai, India
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Strandberg U, Hiltunen M, Creed IF, Arts MT, Kankaala P. Browning-induced changes in trophic functioning of planktonic food webs in temperate and boreal lakes: insights from fatty acids. Oecologia 2023; 201:183-197. [PMID: 36520221 PMCID: PMC9813244 DOI: 10.1007/s00442-022-05301-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 12/05/2022] [Indexed: 12/16/2022]
Abstract
The effects of lake browning on trophic functioning of planktonic food webs are not fully understood. We studied the effects of browning on the response patterns of polyunsaturated fatty acids and n-3/n-6 ratio in seston and compared them between boreal and temperate lakes. We also compared the regional differences and the effects of lake browning on the reliance of zooplankton on heterotrophic microbial pathways and the mass fractions of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in zooplankton. Lake browning was associated with increasing phytoplankton biomass and concentrations of EPA and DHA in both temperate and boreal lakes, but the seston n-3/n-6 ratio was lower in temperate than boreal lakes, most likely due the differences in phytoplankton community composition. The browning-induced increase in phytoplankton biomass was associated with increased reliance of zooplankton on a heterotrophic microbial pathway for both cladocerans and copepods in boreal and temperate lakes. This increased reliance on the heterotrophic microbial diet was correlated with a decrease in the EPA and DHA mass fractions in temperate copepods and a decrease in the n-3/n-6 ratio in boreal cladocerans and copepods. Our results indicate that although phytoplankton responses to lake browning were similar across regions, this did not directly cascade to the next trophic level, where zooplankton responses were highly taxa- and region-specific. These results indicate that lake browning should be considered as an overarching moderator that is linked to, e.g., nutrient increases, which have more immediate consequences on trophic interactions at the phytoplankton-zooplankton interface.
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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
| | | | - Michael T. Arts
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, Canada
| | - Paula Kankaala
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
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4
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Keva O, Kiljunen M, Hämäläinen H, Jones RI, Kahilainen KK, Kankaala P, Laine MB, Schilder J, Strandberg U, Vesterinen J, Taipale SJ. Allochthony, fatty acid and mercury trends in muscle of Eurasian perch (Perca fluviatilis) along boreal environmental gradients. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:155982. [PMID: 35588838 DOI: 10.1016/j.scitotenv.2022.155982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
Environmental change, including joint effects of increasing dissolved organic carbon (DOC) and total phosphorus (TP) in boreal northern lakes may affect food web energy sources and the biochemical composition of organisms. These environmental stressors are enhanced by anthropogenic land-use and can decrease the quality of polyunsaturated fatty acids (PUFAs) in seston and zooplankton, and therefore, possibly cascading up to fish. In contrast, the content of mercury in fish increases with lake browning potentially amplified by intensive forestry practises. However, there is little evidence on how these environmental stressors simultaneously impact beneficial omega-3 fatty acid (n3-FA) and total mercury (THg) content of fish muscle for human consumption. A space-for-time substitution study was conducted to assess whether environmental stressors affect Eurasian perch (Perca fluviatilis) allochthony and muscle nutritional quality [PUFA, THg, and their derivative, the hazard quotient (HQ)]. Perch samples were collected from 31 Finnish lakes along pronounced lake size (0.03-107.5 km2), DOC (5.0-24.3 mg L-1), TP (5-118 μg L-1) and land-use gradients (forest: 50.7-96.4%, agriculture: 0-32.6%). These environmental gradients were combined using principal component analysis (PCA). Allochthony for individual perch was modelled using source and consumer δ2H values. Perch allochthony increased with decreasing lake pH and increasing forest coverage (PC1), but no correlation between lake DOC and perch allochthony was found. Perch muscle THg and omega-6 fatty acid (n6-FA) content increased with PC1 parallel with allochthony. Perch muscle DHA (22:6n3) content decreased, and ALA (18:3n3) increased towards shallower murkier lakes (PC2). Perch allochthony was positively correlated with muscle THg and n6-FA content, but did not correlate with n3-FA content. Hence, the quality of perch muscle for human consumption decreases (increase in HQ) with increasing forest coverage and decreasing pH, potentially mediated by increasing fish allochthony.
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Affiliation(s)
- Ossi Keva
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35 (YA), FI-40014 Jyväskylä, Finland.
| | - Mikko Kiljunen
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35 (YA), FI-40014 Jyväskylä, Finland
| | - Heikki Hämäläinen
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35 (YA), FI-40014 Jyväskylä, Finland
| | - Roger I Jones
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35 (YA), FI-40014 Jyväskylä, Finland
| | - Kimmo K Kahilainen
- Lammi Biological Station, University of Helsinki, Pääjärventie 320, FI-16900 Lammi, Finland
| | - Paula Kankaala
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Miikka B Laine
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35 (YA), FI-40014 Jyväskylä, Finland
| | - Jos Schilder
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35 (YA), FI-40014 Jyväskylä, Finland
| | - Ursula Strandberg
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Jussi Vesterinen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland; Association for Water and Environment of Western Uusimaa, Lohja, Finland
| | - Sami J Taipale
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35 (YA), FI-40014 Jyväskylä, Finland
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Driving Factors of Total Organic Carbon in Danjiangkou Reservoir Using Generalized Additive Model. WATER 2022. [DOI: 10.3390/w14060891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Dynamic changes in total organic carbon (TOC) concentration in lakes and reservoirs affect the functions of aquatic ecosystems and are a key component of water quality management, especially in drinking water sources. The Danjiangkou Reservoir is the water source area of the Middle Route Project of the South-to-North Water Diversion in China. Its water quality is of critical importance to the safety of water diversion. TOC concentration and other environmental factors at 19 sampling sites in the Danjiangkou Reservoir were investigated quarterly during 2020–2021 to explore the differences at the spatio-temporal scales. A generalized additive model (GAM) was used to analyze the environmental factors correlated with the observed spatio-temporal variations of TOC concentration. The results showed that the comprehensive trophic level index (TLI) of the Danjiangkou Reservoir was under the state of intermediate nutrition, and the water quality was overall good. In terms of temporal patterns, TOC concentration was higher in both spring and summer and lower in other seasons. Spatially, TOC concentrations were found in descending order from the site of outlet, Han reservoir, entrance of reservoir, and Dan reservoir. The single-factor GAM model showed that TOC correlated with different environmental factors across spatio-temporal scales. Water temperature (WT), permanganate index (CODMn), and ammonia nitrogen (NH4+-N) were significantly correlated with TOC in autumn, but only total nitrogen (TN) and transparency (SD) were significant in winter. Spatially, WT, chemical oxygen demand (COD), NH4+-N, TN, and conductivity (Cond) correlated with TOC in the Dan reservoir, but WT, COD, NH4+-N, total phosphorus (TP), and chlorophyll a (Chl.a) were significant in the Han reservoir. The multi-factor GAM model indicated that the environmental factors correlated with TOC concentration were mainly WT, TN, Cond, CODMn, and TP, among which WT and Cond showed a significant linear relationship with TOC concentration (edf = 1, p < 0.05), while TN, CODMn, and TP had a significant nonlinear relationship with TOC concentration (edf > 1, p < 0.05). Comprehensive trophic level index (TLI) and TOC concentration revealed a highly significant correlation (R2 = 0.414, p < 0.001). Therefore, the GAM model could well explain the environmental factors associated with the spatio-temporal dynamics of TOC concentration, providing a reference for the evaluation of water quality and research on the carbon cycle in similar inland reservoirs.
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Bhattacharjee J, Marttila H, Launiainen S, Lepistö A, Kløve B. Combined use of satellite image analysis, land-use statistics, and land-use-specific export coefficients to predict nutrients in drained peatland catchment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 779:146419. [PMID: 34030235 DOI: 10.1016/j.scitotenv.2021.146419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/18/2021] [Accepted: 03/08/2021] [Indexed: 06/12/2023]
Abstract
Maintaining and improving surface water quality requires knowledge of nutrient and sediment loads due to past and future land-use practices, but historical data on land cover and its changes are often lacking. In this study, we tested whether land-use-specific export coefficients can be used together with satellite images (Landsat) and/or regional land-use statistics to estimate riverine nutrient loads and concentrations of total nitrogen (TN), total phosphorus (TP), and suspended solids (SS). The study area, Simojoki (3160 km2) in northern Finland, has been intensively drained for peatland forestry since the 1960s. We used different approaches at multiple sub-catchment scales to simulate TN, TP, and SS export in the Simojoki catchment. The uncertainty in estimates based on specific export coefficients was quantified based on historical land-use changes (derived from Landsat data), and an uncertainty boundary was established for each land-use. The uncertainty boundary captured at least 60% of measured values of TN, TP, and SS loads or concentrations. However, the uncertainty in estimates compared with measured values ranged from 7% to 20% for TN, 0% to 18% for TP, and 13% to 43% for SS for different catchments. Some discrepancy between predicted and measured loads and concentrations was expected, as the method did not account for inter-annual variability in hydrological conditions or river processes. However, combining historical land-use change estimates with simple export coefficients can be a practical approach for evaluating the influence on water quality of historical land-use changes such as peatland drainage for forest establishment.
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Affiliation(s)
- Joy Bhattacharjee
- Water, Energy and Environmental Engineering Research Unit, PO Box 4300, 90014 University of Oulu, Finland.
| | - Hannu Marttila
- Water, Energy and Environmental Engineering Research Unit, PO Box 4300, 90014 University of Oulu, Finland.
| | - Samuli Launiainen
- Natural Resources Institute Finland (Luke), Latokartanonkaari 9, 00790 Helsinki, Finland.
| | - Ahti Lepistö
- Finnish Environment Institute (SYKE), Latokartanonkaari 11, 00790 Helsinki, Finland.
| | - Bjørn Kløve
- Water, Energy and Environmental Engineering Research Unit, PO Box 4300, 90014 University of Oulu, Finland.
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7
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NutSpaFHy—A Distributed Nutrient Balance Model to Predict Nutrient Export from Managed Boreal Headwater Catchments. FORESTS 2021. [DOI: 10.3390/f12060808] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Responsible forest management requires accounting for adverse environmental effects, such as increased nutrient export to water courses. We constructed a spatially-distributed nutrient balance model NutSpaFHy that extends the hydrological model SpaFHy by introducing a grid-based nutrient balance sub-model and a conceptual solute transport routine to approximate total nitrogen (N) and phosphorus (P) export to streams. NutSpaFHy uses openly-available Multi-Source National Forest Inventory data, soil maps, topographic databases, location of water bodies, and meteorological variables as input, and computes nutrient processes in monthly time-steps. NutSpaFHy contains two calibrated parameters both for N and P, which were optimized against measured N and P concentrations in runoff from twelve forested catchments distributed across Finland. NutSpaFHy was independently tested against six catchments. The model produced realistic nutrient exports. For one catchment, we simulated 25 scenarios, where clear-cuts were located differently with respect to distance to water body, location on mineral or peat soil, and on sites with different fertility. Results indicate that NutSpaFHy can be used to identify current and future nutrient export hot spots, allowing comparison of logging scenarios with variable harvesting area, location and harvest techniques, and to identify acceptable scenarios that preserve the wood supply whilst maintaining acceptable level of nutrient export.
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Schneider SC, Biberdžić V, Braho V, Gjoreska BB, Cara M, Dana Z, Đurašković P, Eriksen TE, Hjermann D, Imeri A, Jovanović K, Krizmanić J, Kupe L, Loshkoska T, Kemp JL, Marković A, Patceva S, Rakočević J, Stojanović K, Talevska M, Trajanovska S, Trajanovski S, Veljanoska-Sarafiloska E, Vidaković D, Zdraveski K, Živić I, Vermaat JE. Littoral eutrophication indicators are more closely related to nearshore land use than to water nutrient concentrations: A critical evaluation of stressor-response relationships. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 748:141193. [PMID: 32810803 DOI: 10.1016/j.scitotenv.2020.141193] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/22/2020] [Accepted: 07/21/2020] [Indexed: 06/11/2023]
Abstract
Biological assessment metrics and water chemistry measurements are used to quantify the link between stressors and their effects on lake ecosystems, for the Water Framework Directive. However, correlations between metrics and water chemistry are often poor. This is seen as major weaknesses of Water Framework Directive-related monitoring and assessment. We analyzed macrophytes, benthic algae, benthic macroinvertebrates, water chemistry and sediment total phosphorus content in the littoral of six lakes in the Western Balkans and used CORINE land use data to estimate nutrient enrichment via runoff from the adjacent land. Lakes with a higher estimated phosphorus runoff from the adjacent land did not have higher littoral water nutrient concentrations, but littoral diatom assemblages indicated more eutrophic conditions. These lakes also had higher abundances of littoral benthic primary producers, which in turn were associated with low concentrations of dissolved nutrients, but only in autumn, not in spring. This is consistent with primary producers taking up nutrients during the summer growth season. In lakes with high abundances of benthic primary producers, it is likely that the littoral vegetation plays a large role in the transfer of nutrients from the water to the benthos. This process impairs correlations between biological metrics and water nutrient concentrations. Our results suggest that CORINE land cover may be more useful to characterize littoral nutrient enrichment than lake water chemistry. Increased benthic primary producer biomasses and "eutrophic" diatom indices may indicate littoral nutrient enrichment even if water nutrient concentrations are low.
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Affiliation(s)
- Susanne C Schneider
- Norwegian Institute for Water Research, Gaustadalleen 21, 0349 Oslo, Norway.
| | - Vera Biberdžić
- Natural History Museum of Montenegro, Bećir bega Osmanagića 16, 81000, Podgorica, Montenegro
| | - Vjola Braho
- Agricultural University of Tirana, Faculty of Agriculture and Environment, Paisi Vodica, Kodër-Kamza, Tirana, Albania
| | | | - Magdalena Cara
- Agricultural University of Tirana, Faculty of Agriculture and Environment, Paisi Vodica, Kodër-Kamza, Tirana, Albania
| | - Zamira Dana
- Agricultural University of Tirana, Faculty of Agriculture and Environment, Paisi Vodica, Kodër-Kamza, Tirana, Albania
| | - Pavle Đurašković
- Institute of Hydrometeorology and Seismology, 4th Proleterske brigade 19, 81000 Podgorica, Montenegro
| | - Tor Erik Eriksen
- Norwegian Institute for Water Research, Gaustadalleen 21, 0349 Oslo, Norway
| | - Dag Hjermann
- Norwegian Institute for Water Research, Gaustadalleen 21, 0349 Oslo, Norway
| | - Alma Imeri
- Agricultural University of Tirana, Faculty of Agriculture and Environment, Paisi Vodica, Kodër-Kamza, Tirana, Albania
| | - Katarina Jovanović
- Institute of Public Health of Serbia Dr Milan Jovanovic Batut, dr Subotića starijeg 5, 11000 Belgrade, Serbia
| | - Jelena Krizmanić
- University of Belgrade, Faculty of Biology, Institute of Botany and Botanical Garden "Jevremovac", 43 Takovska, Belgrade 11000, Serbia
| | - Lirika Kupe
- Agricultural University of Tirana, Faculty of Agriculture and Environment, Paisi Vodica, Kodër-Kamza, Tirana, Albania
| | | | - Joanna Lynn Kemp
- Norwegian Institute for Water Research, Gaustadalleen 21, 0349 Oslo, Norway
| | - Aleksandra Marković
- University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Department of Chemistry, Njegoševa 12, Belgrade 11000, Serbia
| | - Suzana Patceva
- Hydrobiological Institute Ohrid, Naum Ohridski 50, 6000 Ohrid, Macedonia
| | - Jelena Rakočević
- University of Montenegro, Faculty of Natural Sciences and Mathematics, Biology Department, 81000 Podgorica, Montenegro
| | - Katarina Stojanović
- University of Belgrade - Faculty of Biology, Studentski trg 16, 11 000 Belgrade, Serbia
| | - Marina Talevska
- Hydrobiological Institute Ohrid, Naum Ohridski 50, 6000 Ohrid, Macedonia
| | - Sonja Trajanovska
- Hydrobiological Institute Ohrid, Naum Ohridski 50, 6000 Ohrid, Macedonia
| | - Sasho Trajanovski
- Hydrobiological Institute Ohrid, Naum Ohridski 50, 6000 Ohrid, Macedonia
| | | | - Danijela Vidaković
- University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Department of Chemistry, Njegoševa 12, Belgrade 11000, Serbia
| | - Konstantin Zdraveski
- Public Institution Galicica National Park, Department of Alternative Activities and Environmental Education, Velestovski pat b.b., 6000 Ohrid, Macedonia
| | - Ivana Živić
- University of Belgrade - Faculty of Biology, Studentski trg 16, 11 000 Belgrade, Serbia
| | - Jan E Vermaat
- Faculty of Environmental Sciences and Nature Conservation, Norwegian University of Life Sciences, P.O. Box 5003, 1430 Ås, Norway
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Yan X, Wu S, Xu J, Xu X, Wang G. Parallelism of Nutrients and CO 2 Dynamics: Evidence Based on Long-Term Data in Taihu Lake. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 105:742-749. [PMID: 33000334 DOI: 10.1007/s00128-020-03009-2] [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: 04/21/2020] [Accepted: 09/23/2020] [Indexed: 06/11/2023]
Abstract
Inland lakes are important ecosystems for the carbon cycle at both regional and global scales. However, a knowledge gap still exists about the correlations between the partial pressure of CO2 (pCO2) and nutrient dynamics in lakes. In this study, we analysed the long-term dynamics of nutrient and pCO2 in Taihu Lake. Strong spatial heterogeneity was observed with highest nutrient concentrations occurring in the River mouth and significant lower concentrations (p < 0.01) occurring in East Taihu and Other zone. For pCO2, the average values were 1136.81 ± 1240.16 μatm, 433.07 ± 305.45 μatm, and 487.05 ± 414.02 μatm in Rive mouth, East Taihu, and Other zone, respectively. Statistical analysis revealed that pCO2 was significantly and positively related to nutrient (TN: total nitrogen and NH4+: ammonium) concentrations (p < 0.01), but negatively related to Chla (Chlorophyll a) concentrations in River mouth and Other zone (p < 0.01). The parallelism of nutrient concentrations and pCO2 in Taihu Lake highlights the dual effects of external pollution inputs from the surrounding catchment. In addition, progressive mitigation was found for not only nutrients but also pCO2, which was attributed to the previous effort in the environmental protections in Taihu Lake basin. Our results also suggest the importance of long-term monitoring for the future assessment of anthropogenic impacts on nutrient and CO2 dynamics in freshwater lakes.
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Affiliation(s)
- Xingcheng Yan
- Sorbonne Université, UMR 7619 METIS, 4 place Jussieu, Box 105, 75005, Paris, France
| | - Songjun Wu
- Department of Ecohydrology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587, Berlin, Germany
- Department of Geography, Humboldt University of Berlin, Rudower Chaussee 16, 12489, Berlin, Germany
| | - Jie Xu
- Key Laboratory of Virtual Geographic Environment of Education Ministry, Nanjing Normal University, Nanjing, 210023, People's Republic of China.
| | - Xiaoguang Xu
- School of Environment, Nanjing Normal University, Nanjing, 210023, People's Republic of China
| | - Guoxiang Wang
- School of Environment, Nanjing Normal University, Nanjing, 210023, People's Republic of China
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10
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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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11
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DelSontro T, Beaulieu JJ, Downing JA. Greenhouse gas emissions from lakes and impoundments: upscaling in the face of global change. LIMNOLOGY AND OCEANOGRAPHY LETTERS 2019; 3:64-75. [PMID: 32076654 PMCID: PMC7029703 DOI: 10.1002/lol2.10073] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 02/15/2018] [Indexed: 05/08/2023]
Abstract
Lakes and impoundments are important sources of greenhouse gases (GHG: i.e., CO2, CH4, N2O), yet global emission estimates are based on regionally-biased averages and elementary upscaling. We assembled the largest global dataset to date on emission rates of all three GHGs and found they covary with lake size and trophic state. Fitted models were upscaled to estimate global emission using global lake size inventories and a remotely-sensed global lake productivity distribution. Traditional upscaling approaches overestimated CO2 and N2O emission but underestimated CH4 by half. Our upscaled size-productivity weighted estimates (1.25-2.30 Pg of CO2-equivalents annually) are nearly 20% of global CO2 fossil fuel emission with ~75% of the climate impact due to CH4. Moderate global increases in eutrophication could translate to 5-40% increases in the GHG effects in the atmosphere, adding the equivalent effect of another 13% of fossil fuel combustion or an effect equal to GHG emissions from current land use change.
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Affiliation(s)
- Tonya DelSontro
- Groupe de Recherche Interuniversitaire en Limnologie (GRIL), Département des sciences biologiques, Université du Québec à Montréal, Case postale 8888, succ. Centre-Ville, Montréal, QC, H3C 3P8 Canada
| | - J. J. Beaulieu
- United States Environmental Protection Agency, Office of Research and Development, Cincinnati, Ohio, 45268 USA
| | - John A. Downing
- University of Minnesota, Minnesota Sea Grant and Large Lakes Observatory, Duluth, Minnesota, USA
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Liu S, Ryu D, Webb JA, Lintern A, Waters D, Guo D, Western AW. Characterisation of spatial variability in water quality in the Great Barrier Reef catchments using multivariate statistical analysis. MARINE POLLUTION BULLETIN 2018; 137:137-151. [PMID: 30503420 DOI: 10.1016/j.marpolbul.2018.10.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 10/04/2018] [Accepted: 10/04/2018] [Indexed: 05/23/2023]
Abstract
Water quality monitoring is important to assess changes in inland and coastal water quality. The focus of this study was to improve understanding of the spatial component of spatial-temporal water quality dynamics, particularly the spatial variability in water quality and the association between this spatial variability and catchment characteristics. A dataset of nine water quality constituents collected from 32 monitoring sites over a 11-year period (2006-2016), across the Great Barrier Reef catchments (Queensland, Australia), were evaluated by multivariate techniques. Two clusters were identified, which were strongly associated with catchment characteristics. A two-step Principal Component Analysis/Factor Analysis revealed four groupings of constituents with similar spatial pattern and allowed the key catchment characteristics affecting water quality to be determined. These findings provide a more nuanced view of spatial variations in water quality compared with previous understanding and an improved basis for water quality management to protect nearshore marine ecosystem.
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Affiliation(s)
- S Liu
- Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - D Ryu
- Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - J A Webb
- Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - A Lintern
- Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia; Department of Civil Engineering, Monash University, VIC 3800, Australia
| | - D Waters
- Queensland Department of Natural Resources, Mines and Energy, Toowoomba, QLD 4350, Australia
| | - D Guo
- Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - A W Western
- Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
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Huser BJ, Futter MN, Wang R, Fölster J. Persistent and widespread long-term phosphorus declines in Boreal lakes in Sweden. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 613-614:240-249. [PMID: 28915460 DOI: 10.1016/j.scitotenv.2017.09.067] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 09/07/2017] [Accepted: 09/07/2017] [Indexed: 05/14/2023]
Abstract
We present an analysis of long-term (1988-2013; 26years) total phosphorus (TP) concentration trends in 81 Swedish boreal lakes subject to minimal anthropogenic disturbance. Near universal increases in dissolved organic carbon (DOC) concentrations and a widespread but hitherto unexplained decline in TP were observed. Over 50% of the lakes (n=42) had significant declining TP trends over the past quarter century (Sen's slope=2.5%y-1). These declines were linked to catchment processes related to changes in climate, recovery from acidification, and catchment soil properties, but were unrelated to trends in P deposition. Increasing DOC concentrations appear to be masking in-lake TP declines. When the effect of increasing DOC was removed, the small number of positive TP trends (N=5) turned negative and the average decline in TP increased to 3.9%y-1. The greatest relative TP declines occurred in already nutrient poor, oligotrophic systems and TP concentrations have reached the analytical detection limit (1μgL-1) in some lakes. In addition, ongoing oligotrophication may be exacerbated by increased reliance on renewable energy from forest biomass and hydropower. It is a cause of significant concern that potential impairments to lake ecosystem functioning associated with oligotrophication are not well handled by a management paradigm focused exclusively on the negative consequences of increasing phosphorus concentrations.
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Affiliation(s)
- Brian J Huser
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, 750 07 Uppsala, Sweden.
| | - Martyn N Futter
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, 750 07 Uppsala, Sweden
| | - Rong Wang
- Department of Global Ecology, Carnegie Institution for Science, Stanford, CA 94305, USA
| | - Jens Fölster
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, 750 07 Uppsala, Sweden
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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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