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1. A system of metrics for the assessment and improvement of aquatic ecosystem models

Author:
Hipsey, Matthew R.; Gal, Gideon; Arhonditsis, George B.; Carey, Cayelan C.; Elliott, J. Alex; Frassl, Marieke A.; Janse, Jan H.; de Mora, Lee; Robson, Barbara J.
Source:
Environmental modelling & software 2020 v.128 pp. 104697
ISSN:
1364-8152
Subject:
aquatic ecosystems,   etc   ; case studies; ecological models; prediction;     Show all 4 Subjects
Abstract:
... In this paper, we introduce the CSPS framework for the hierarchical assessment of aquatic ecosystem models built on a range of metrics and characteristic signatures relevant to aquatic ecosystem condition. The framework is comprised of four levels: 0) conceptual validation; 1) comparison of simulated state variables with observations (‘state validation’); 2) comparison of fluxes with measured proc ...
DOI:
10.1016/j.envsoft.2020.104697

2. Water volume differentially modifies copepod predatory strengths on two prey types

Author:
Cuthbert, Ross N.; Sithagu, Rotondwa; Weyl, Olaf L.F.; Wasserman, Ryan J.; Dick, Jaimie T.A.; Callaghan, Amanda; Froneman, P. William; Foord, Stefan; Dalu, Tatenda
Source:
Limnologica 2020 v.81 pp. 125747
ISSN:
0075-9511
Subject:
aquatic ecosystems,   etc   ; Copepoda; Culex; Daphnia; risk;     Show all 5 Subjects
Abstract:
... Predatory interaction strengths are highly context-dependent, and in temporary aquatic ecosystems, may be affected by water volume changes. We examine the influence of water volume on Lovenula raynerae (Copepoda) functional responses towards two temporary pond prey types. Daphnia prey risk was not affected by increasing water volume, whereas for Culex prey risk was reduced. Accordingly, water volu ...
DOI:
10.1016/j.limno.2020.125747

3. First Record of Cymatopleura aquastudia Kociolek & You and C. xinjiangiana You & Kociolek in Aquatic Ecosystems of Vietnam

Author:
Glushchenko, A. M.; Kulikovskiy, M. S.
Source:
Inland water biology 2019 v.12 no.2 pp. 254-257
ISSN:
1995-0829
Subject:
aquatic ecosystems,   etc   ; Cymatopleura; morphometry; Vietnam;     Show all 4 Subjects
Abstract:
... Two Cymatopleura species are found in aquatic ecosystems of North Vietnam: C. aquastudia Kociolek & You 2017 and C. xinjiangiana You & Kociolek 2017. The main qualitative (valve shape) and quantitative (morphometric characteristics) taxonomic data are given. The species are illustrated by original LM microphotographs. ...
DOI:
10.1134/S1995082919020068

4. Quantifying photosynthetic performance of phytoplankton based on photosynthesis–irradiance response models

Author:
Yang, Xiaolong; Liu, Lihua; Yin, Zhikai; Wang, Xingyu; Wang, Shoubing; Ye, Zipiao
Source:
Environmental sciences Europe 2020 v.32 no.1 pp. 24
ISSN:
2190-4707
Subject:
aquatic ecosystems,   etc   ; Dunaliella salina; Isochrysis galbana; Microcystis aeruginosa; freshwater; light intensity; photosynthesis; phytoplankton; radiation use efficiency;     Show all 9 Subjects
Abstract:
... BACKGROUND: Clarifying the relationship between photosynthesis and irradiance and accurately quantifying photosynthetic performance are of importance to calculate the productivity of phytoplankton, whether in aquatic ecosystems modelling or obtaining more economical production. RESULTS: The photosynthetic performance of seven phytoplankton species was characterized by four typical photosynthesis–i ...
DOI:
10.1186/s12302-020-00306-9

5. The value of perfect and imperfect information in lake monitoring and management

Author:
Koski, Vilja; Kotamäki, Niina; Hämäläinen, Heikki; Meissner, Kristian; Karvanen, Juha; Kärkkäinen, Salme
Source:
The Science of the total environment 2020 v.726 pp. 138396
ISSN:
0048-9697
Subject:
aquatic ecosystems,   etc   ; case studies; confidence interval; decision making; economic valuation; ecosystem management; lakes; monitoring; profitability; uncertainty;     Show all 10 Subjects
Abstract:
... Uncertainty in the information obtained through monitoring complicates decision making about aquatic ecosystems management actions. We suggest the value of information (VOI) to assess the profitability of paying for additional monitoring information, when taking into account the costs and benefits of monitoring and management actions, as well as associated uncertainty. Estimating the monetary valu ...
DOI:
10.1016/j.scitotenv.2020.138396

6. Molecular weight-dependent heterogeneities in photochemical formation of hydroxyl radical from dissolved organic matters with different sources

Author:
Xu, Huacheng; Li, Yani; Zhao, Ling; Du, Haiyan; Jiang, Helong
Source:
The Science of the total environment 2020 v.725 pp. 138402
ISSN:
0048-9697
Subject:
aquatic ecosystems,   etc   ; dissolved organic matter; fluorescence; fractionation; humic substances; hydroxyl radicals; molecular weight; photochemistry;     Show all 8 Subjects
Abstract:
... Dissolved organic matter (DOM) is ubiquitous in aquatic ecosystem and characterized by a wide range of molecular weight (MW) distribution. In this study, a total of nine bulk DOM samples, including five International Humic Substances Society (IHSS) standards and four naturally collected samples, were fractionated into low MW (LMW-, <1 kDa) and high MW (HMW-, 1 kDa~0.45 μm) fractions, with MW-depen ...
DOI:
10.1016/j.scitotenv.2020.138402

7. Use of muralism to promote awareness about aquatic ecosystems and wise water consumption in northwestern Ecuador

Author:
Sanchez, Estefanía; Vinueza, Rubén; Izurieta, Xiomara; Rey, Nuria
Source:
Ocean & coastal management 2020 v.190 pp. 105165
ISSN:
0964-5691
Subject:
aquatic ecosystems,   etc   ; adolescents; children; coastal zone management; education programs; environmental education; statistics; students; surveys; Ecuador;     Show all 10 Subjects
Abstract:
... In this article, we present the results of the use of muralism as an artistic tool applied to environmental education with a focus on the promotion of awareness of aquatic ecosystems and rationed water consumption in the province of Esmeraldas in northwestern Ecuador. The research was conducted by an interdisciplinary team of professors and students from the Pontificia Universidad Católica del Ecu ...
DOI:
10.1016/j.ocecoaman.2020.105165

8. Forecasting leachate generation from pilot woodchip stockpiles using a three-dimensional transient flow model

Author:
Amato, Matthew T.; Giménez, Daniel; Kannepalli, Sarat; Strom, Peter F.; Krogmann, Uta; Miskewitz, Robert J.
Source:
Journal of environmental management 2020 v.262 pp. 110379
ISSN:
0301-4797
Subject:
aquatic ecosystems,   etc   ; Bayesian theory; Markov chain; algorithms; leachates; mathematical models; prediction; rain; transient flow; wood chips;     Show all 10 Subjects
Abstract:
... Leachate generation from open stockpiles of recycled woodchip materials is potentially harmful to aquatic ecosystems. There is growing interest in using numerical models to simulate leachate generation from outdoor piles, but this requires information about the hydraulic properties of the materials. The objectives of this study were to simulate leachate from woodchip piles with the numerical model ...
DOI:
10.1016/j.jenvman.2020.110379

9. Megamerger of biosorbents and catalytic technologies for the removal of heavy metals from wastewater: Preparation, final disposal, mechanism and influencing factors

Author:
Huang, Danlian; Li, Bo; Ou, Jing; Xue, Wenjing; Li, Jing; Li, Zhihao; Li, Tao; Chen, Sha; Deng, Rui; Guo, Xueying
Source:
Journal of environmental management 2020 v.261 pp. 109879
ISSN:
0301-4797
Subject:
aquatic ecosystems,   etc   ; adsorption; biosorbents; catalytic activity; desorption; heavy metals; plant residues; pollution; raw materials; toxicity; wastewater;     Show all 11 Subjects
Abstract:
... Heavy metal pollution, because of its high toxicity, non-biodegradability and biological enrichment, has been identified as a global aquatic ecosystems threat in recent decades. Due to the high efficiency, low cost, satisfactory recyclability, easy storage and separation, biosorbents have exhibited a promising prospect for heavy metals treatment in aqueous phase. This article comprehensively summa ...
DOI:
10.1016/j.jenvman.2019.109879

10. The unexpected concentration-dependent response of periphytic biofilm during indole acetic acid removal

Author:
Wang, Sichu; Ma, Lan; Xu, Ying; Wang, Yu; Zhu, Ningyuan; Liu, Junzhuo; Dolfing, Jan; Kerr, Philip; Wu, Yonghong
Source:
Bioresource technology 2020 v.303 pp. 122922
ISSN:
0960-8524
Subject:
aquatic ecosystems,   etc   ; antioxidant enzymes; biofilm; bioremediation; community structure; enzyme activation; indole acetic acid; water pollution;     Show all 8 Subjects
Abstract:
... Due to its extensive application in agriculture as a germinating agent and growth promoter, indole acetic acid (IAA) is present in a variety of aquatic ecosystems. To explore the response of microbial aggregates to exogenous IAA in aquatic ecosystems, periphytic biofilm, a typical microbial aggregate, was exposed to IAA at different concentrations. Results reveal an unexpected concentration-depend ...
DOI:
10.1016/j.biortech.2020.122922

11. Shifts in mercury methylation across a peatland chronosequence: From sulfate reduction to methanogenesis and syntrophy

Author:
Hu, Haiyan; Wang, Baolin; Bravo, Andrea G.; Björn, Erik; Skyllberg, Ulf; Amouroux, David; Tessier, Emmanuel; Zopfi, Jakob; Feng, Xinbin; Bishop, Kevin; Nilsson, Mats B.; Bertilsson, Stefan
Source:
Journal of hazardous materials 2020 v.387 pp. 121967
ISSN:
0304-3894
Subject:
aquatic ecosystems,   etc   ; chronosequences; demethylation; environmental exposure; mercury; methane production; methanogens; methylation; methylmercury compounds; peatlands; sulfates; toxicity;     Show all 12 Subjects
Abstract:
... Peatlands are globally important ecosystems where inorganic mercury is converted to bioaccumulating and highly toxic methylmercury, resulting in high risks of methylmercury exposure in adjacent aquatic ecosystems. Although biological mercury methylation has been known for decades, there is still a lack of knowledge about the organisms involved in mercury methylation and the drivers controlling the ...
DOI:
10.1016/j.jhazmat.2019.121967

12. Legacy and Emerging Brominated Flame Retardants in Bizerte Lagoon Murex (Hexaplex Trunculus): Levels and Human Health Risk Assessment

Author:
Ameur, Walid Ben; Annabi, Ali; El Megdiche, Yassine; Mhadhbi, Takoua; Hassine, Sihem Ben; Barhoumi, Badreddine; Touil, Soufiane; Driss, Mohamed Ridha; Barceló, Damia; Eljarrat, Ethel
Source:
Archives of environmental contamination and toxicology 2020 v.78 no.3 pp. 337-349
ISSN:
0090-4341
Subject:
aquatic ecosystems,   etc   ; Hexaplex trunculus; decabromodiphenyl ethane; flame retardants; health effects assessments; human health; molluscs; pollutants; shellfish;     Show all 9 Subjects
Abstract:
... Occurrence of traditional (PBDEs) and novel (HBB, PBEB, DBDPE) brominated flame retardants, as well as the natural compounds of MeO-PBDEs, were studied in a shellfish species (Hexaplex trunculus) sampled from Bizerte Lagoon. PBDE and MeO-PBDE mean concentrations in murex soft tissues were 187 and 264 ng g⁻¹ lw respectively. The alternative flame retardants were not identified. The sum of PBDE and ...
DOI:
10.1007/s00244-019-00694-x

13. Resilience of aquatic systems: Review and management implications

Author:
Pelletier, Marguerite C.; Ebersole, Joe; Mulvaney, Kate; Rashleigh, Brenda; Gutierrez, Mary Nicole; Chintala, Marnita; Kuhn, Anne; Molina, Marirosa; Bagley, Mark; Lane, Chuck
Source:
Aquatic sciences 2020 v.82 no.2 pp. 44
ISSN:
1015-1621
Subject:
aquatic ecosystems,   etc   ; adaptive management; biodiversity; collaborative management; habitat connectivity; monitoring; social environment; stakeholders;     Show all 8 Subjects
Abstract:
... Our understanding of how ecosystems function has changed from an equilibria-based view to one that recognizes the dynamic, fluctuating, nonlinear nature of aquatic systems. This current understanding requires that we manage systems for resilience. In this review, we examine how resilience has been defined, measured and applied in aquatic systems, and more broadly, in the socioecological systems in ...
DOI:
10.1007/s00027-020-00717-z

14. Regional regression models for estimating monthly streamflows

Author:
Zhang, Zhenxing; Balay, John W.; Liu, Can
Source:
The Science of the total environment 2020 v.706 pp. 135729
ISSN:
0048-9697
Subject:
aquatic ecosystems,   etc   ; databases; drainage; monitoring; regression analysis; stream flow; water resources; watersheds; weather;     Show all 9 Subjects
Abstract:
... Environmental flow science has attracted significant attention in recent years and has become more widely implemented by various agencies responsible for managing water resources. In addition to annual environmental flows, monthly environmental flows have been increasingly used to protect aquatic ecosystems. Regional regression analysis is commonly used to estimate streamflows when long-term conti ...
DOI:
10.1016/j.scitotenv.2019.135729

15. The effect of varied dam release mechanisms and storage volume on downstream river thermal regimes

Author:
Michie, Laura E.; Hitchcock, James N.; Thiem, Jason D.; Boys, Craig A.; Mitrovic, Simon M.
Source:
Limnologica 2020 v.81 pp. 125760
ISSN:
0075-9511
Subject:
aquatic ecosystems,   etc   ; basins; dams (hydrology); fish; remediation; rivers; spillways; temperature; thermal pollution; thermodynamics; threatened species; Australia;     Show all 12 Subjects
Abstract:
... Temperature plays an essential role in the ecology and biology of aquatic ecosystems. The use of dams to store and subsequently re-regulate river flows can have a negative impact on the natural thermal regime of rivers, causing thermal pollution of downstream river ecosystems. Autonomous thermal loggers were used to measure temperature changes downstream of a large dam on the Macquarie River, in A ...
DOI:
10.1016/j.limno.2020.125760

16. When policy implementation failures affect public preferences for environmental goods: Implications for economic analysis in the European water policy

Author:
Perni, Ángel; Barreiro-Hurlé, Jesús; Martínez-Paz, José Miguel
Source:
Ecological economics 2020 v.169 pp. 106523
ISSN:
0921-8009
Subject:
aquatic ecosystems,   etc   ; contingent valuation; decision making; surface water; surveys; utility functions; water policy; Spain;     Show all 8 Subjects
Abstract:
... The Water Framework Directive (WFD) establishes that Programme of Measures (PoMs) to manage aquatic ecosystems have to be assessed to determine whether the benefits obtained from the good ecological status outweigh the costs. Stated preference methods have been widely applied to estimate non-market benefits of improved ecological status, assuming that respondents declare their true preferences tha ...
DOI:
10.1016/j.ecolecon.2019.106523

17. Zinc and aluminum mixtures have synergic effects to the algae Raphidocelis subcapitata at environmental concentrations

Author:
Gebara, Renan Castelhano; Alho, Lays de Oliveira Gonçalves; Rocha, Giseli Swerts; Mansano, Adrislaine da Silva; Melão, Maria da Graça Gama
Source:
Chemosphere 2020 v.242 pp. 125231
ISSN:
0045-6535
Subject:
aquatic ecosystems,   etc   ; Selenastrum capricornutum; aluminum; antagonists; chlorophyll; fluorescence; inhibitory concentration 50; microalgae; models; synergism; toxicity; zinc;     Show all 12 Subjects
Abstract:
... A large number of metals is present in aquatic ecosystems, often occurring simultaneously, however, the isolated toxicity of them are better well known than their mixtures. Based on that, for the first time we aimed to test the effects of zinc (Zn) and aluminum (Al) mixtures to the microalgae Raphidocelis subcapitata. Regarding isolated toxicity, the 96 h IC₅₀ of Zn and Al based on specific growth ...
DOI:
10.1016/j.chemosphere.2019.125231

18. Evaluating temporal patterns of metals concentrations in floodplain lakes of the Athabasca Delta (Canada) relative to pre-industrial baselines

Author:
Kay, M.L.; Wiklund, J.A.; Remmer, C.R.; Owca, T.J.; Klemt, W.H.; Neary, L.K.; Brown, K.; MacDonald, E.; Thomson, K.; Vucic, J.M.; Wesenberg, K.; Hall, R.I.; Wolfe, B.B.
Source:
The Science of the total environment 2020 v.704 pp. 135309
ISSN:
0048-9697
Subject:
aquatic ecosystems,   etc   ; floodplains; lakes; landscapes; monitoring; oil sands; pollution; primary pollutants; rivers; vanadium; zinc; Alberta;     Show all 12 Subjects
Abstract:
... Sediment quality monitoring is widely used to quantify extent of river pollution, but requires knowledge of pre-disturbance conditions in the potentially altered landscape. This has long been identified as a critical aspect to develop for addressing concerns of river pollution in the Alberta Oil Sands Region. Here, we use analyses of sediment cores from eight floodplain lakes spanning a 67 river-k ...
DOI:
10.1016/j.scitotenv.2019.135309

19. Effect of nutrient concentration on growth and saxitoxin production of Raphidiopsis raciborskii (Cyanophyta) interacting with Monoraphidium contortum (Chlorophyceae)

Author:
Vargas, Sarah Regina; dos Santos, Paulo Vagner; Bottino, Flavia; Calijuri, Maria do Carmo
Source:
Journal of applied phycology 2020 v.32 no.1 pp. 421-430
ISSN:
0921-8971
Subject:
aquatic ecosystems,   etc   ; Chlorophyceae; Monoraphidium; Raphidiopsis; bioassays; biomass; dominant species; enzyme-linked immunosorbent assay; nutrient content; saxitoxins;     Show all 10 Subjects
Abstract:
... Raphidiopsis raciborskii is the dominant species in several subtropical aquatic ecosystems. This study addressed the influence of nutrient concentration on cyanobacteria growth and saxitoxin synthesis. Therefore, we performed bioassays of interaction between the Chlorophyceae Monoraphidium contortum and R. raciborskii simulating oligotrophic and supereutrophic environments. Experiments were carrie ...
DOI:
10.1007/s10811-019-01972-w

20. Selenium mass balance and flux in water of Pariette Wetlands, Utah (USA)

Author:
Jones, Colleen P.; Amacher, Michael C.; Grossl, Paul R.; Jacobson, Astrid R.
Source:
Applied geochemistry 2020 v.113 pp. 104517
ISSN:
0883-2927
Subject:
aquatic ecosystems,   etc   ; bioaccumulation; biogeochemistry; fauna; flora; lakes; sediments; selenium; sorption; volatilization; wetlands; Utah;     Show all 12 Subjects
Abstract:
... Selenium (Se) has potentially deleterious impacts on flora and fauna of aquatic ecosystems. As Se moves through a wetlands system, various processes such as sorption onto sediments, plant uptake, and volatilization into the atmosphere can attenuate Se resulting in its storage in the wetlands. A comparison of inlet and outlet Se fluxes can be used to determine the mass of Se stored in a wetlands sy ...
DOI:
10.1016/j.apgeochem.2019.104517