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Franco ME, Hill BN, Brooks BW, Lavado R. Prymnesium parvum differentially triggers sublethal fish antioxidant responses in vitro among salinity and nutrient conditions. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 213:105214. [PMID: 31185429 DOI: 10.1016/j.aquatox.2019.05.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/27/2019] [Accepted: 05/27/2019] [Indexed: 05/11/2023]
Abstract
Significant fish kills have been attributed to Prymnesium parvum in coastal and inland waters around the world. However, specific mechanisms responsible for adverse outcomes resulting from this harmful algal bloom (HAB) species remain unclear, though the gill has previously been identified as an important target organ. In the present study, an in vitro approach was used to examine cytotoxicity and antioxidant responses in fish liver (Hepa-E1 and PLHC-1) and gill (G1B and RTgill-W1) cell lines, following exposure to P. parvum grown at different salinities and nutrient concentrations, which can influence the magnitude of acute toxicity. Cultures from high salinity compromised survival of hepatic cell lines exposed to high dilutions, whereas no significant cytotoxicity was observed for gill cell lines. With respect to control groups, catalase showed significant activity in both gill cell lines, especially RTgill-W1, following exposure to high salinity cultures. High levels of superoxide dismutase were measured in Hepa-E1 cells exposed to all experimental treatment combinations and in RTgill-W1 cells following exposure to high salinity conditions, with respect to non-exposed cells Glutathione peroxidase activity was also detected at significant levels in Hepa-E1 cells after exposure to cultures from high salinity and the low salinity X low nutrients. Slight GPx increases were only observed in PLHC-1 and G1B exposed to P. parvum grown at high salinity. These results suggest that: 1. specific combinations of salinity and nutrient levels may contribute to production and potency of P. parvum toxins resulting in sub-lethal effects, and 2. sub-lethal responses are more prominent than cytotoxicity, and that oxidative stress may be a significant adverse effect of toxins produced by P. parvum.
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Affiliation(s)
- Marco E Franco
- Department of Environmental Science, Baylor University, Waco, TX 76798, USA
| | - Bridgett N Hill
- Department of Environmental Science, Baylor University, Waco, TX 76798, USA
| | - Bryan W Brooks
- Department of Environmental Science, Baylor University, Waco, TX 76798, USA
| | - Ramon Lavado
- Department of Environmental Science, Baylor University, Waco, TX 76798, USA.
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2
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Furley TH, Brodeur J, Silva de Assis HC, Carriquiriborde P, Chagas KR, Corrales J, Denadai M, Fuchs J, Mascarenhas R, Miglioranza KSB, Miguez Caramés DM, Navas JM, Nugegoda D, Planes E, Rodriguez‐Jorquera IA, Orozco‐Medina M, Boxall ABA, Rudd MA, Brooks BW. Toward sustainable environmental quality: Identifying priority research questions for Latin America. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2018; 14:344-357. [PMID: 29469193 PMCID: PMC5947661 DOI: 10.1002/ieam.2023] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 08/14/2017] [Accepted: 11/14/2017] [Indexed: 05/19/2023]
Abstract
The Global Horizon Scanning Project (GHSP) is an innovative initiative that aims to identify important global environmental quality research needs. Here we report 20 key research questions from Latin America (LA). Members of the Society of Environmental Toxicology and Chemistry (SETAC) LA and other scientists from LA were asked to submit research questions that would represent priority needs to address in the region. One hundred questions were received, then partitioned among categories, examined, and some rearranged during a workshop in Buenos Aires, Argentina. Twenty priority research questions were subsequently identified. These research questions included developing, improving, and harmonizing across LA countries methods for 1) identifying contaminants and degradation products in complex matrices (including biota); 2) advancing prediction of contaminant risks and effects in ecosystems, addressing lab-to-field extrapolation challenges, and understanding complexities of multiple stressors (including chemicals and climate change); and 3) improving management and regulatory tools toward achieving sustainable development. Whereas environmental contaminants frequently identified in these key questions were pesticides, pharmaceuticals, endocrine disruptors or modulators, plastics, and nanomaterials, commonly identified environmental challenges were related to agriculture, urban effluents, solid wastes, pulp and paper mills, and natural extraction activities. Several interesting research topics included assessing and preventing pollution impacts on conservation protected areas, integrating environment and health assessments, and developing strategies for identification, substitution, and design of less hazardous chemicals (e.g., green chemistry). Finally, a recurrent research need included developing an understanding of differential sensitivity of regional species and ecosystems to environmental contaminants and other stressors. Addressing these critical questions will support development of long-term strategic research efforts to advance more sustainable environmental quality and protect public health and the environment in LA. Integr Environ Assess Manag 2018;14:344-357. © 2018 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals, Inc. on behalf of Society of Environmental Toxicology & Chemistry (SETAC).
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Affiliation(s)
| | - Julie Brodeur
- Instituto de Recursos Biológicos, Centro de Investigaciones de Recursos Naturales (CIRN)Instituto Nacional de Tecnología Agropecuaria (INTA)Buenos AiresArgentina
| | | | | | | | - Jone Corrales
- Department of Environmental ScienceBaylor UniversityWacoTexasUSA
| | - Marina Denadai
- Department of ChemistryFederal University of São CarlosSão CarlosBrazil
| | - Julio Fuchs
- IQUIBICEN‐CONICETUniversidad de Buenos AiresBuenos AiresArgentina
| | | | | | - Diana Margarita Miguez Caramés
- Laboratorio Ecotoxicología y Contaminación Ambiental, IIMyC, CONICET‐UNMDPArgentina
- Laboratorio Tecnológico del Uruguay (LATU)MontevideoUruguay
| | | | | | - Estela Planes
- National Institute of Industrial TechnologyChemistry CenterBuenos AiresArgentina
| | | | | | | | - Murray A Rudd
- Department of Environmental SciencesEmory UniversityAtlantaGeorgiaUSA
| | - Bryan W Brooks
- Department of Environmental ScienceBaylor UniversityWacoTexasUSA
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Pu Z, Cortez MH, Jiang L. Predator-Prey Coevolution Drives Productivity-Richness Relationships in Planktonic Systems. Am Nat 2016; 189:28-42. [PMID: 28035895 DOI: 10.1086/689550] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The relationship between environmental productivity and species richness often varies among empirical studies, and despite much research, simple explanations for this phenomenon remain elusive. We investigated how phytoplankton and zooplankton coevolution shapes productivity-richness relationships in both phytoplankton and zooplankton, using a simple nutrient-phytoplankton-zooplankton model that incorporates size-dependent metabolic rates summarized from empirical studies. The model allowed comparisons of evolved species richness across productivity levels and at different evolutionary times. Our results show that disruptive selection leads to evolutionary branching of phytoplankton and zooplankton. Both the time required for evolutionary branching and the number of evolved species in phytoplankton and zooplankton tend to increase with productivity, producing a transient unimodal or positive productivity-richness relationship but followed by a positive productivity-richness relationship for both groups over long enough evolutionary time. Our findings suggest that coevolution between phytoplankton and zooplankton can drive the two common forms (unimodal and positive) of productivity-richness relationships in nature.
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Shimoda Y, Arhonditsis GB. Phytoplankton functional type modelling: Running before we can walk? A critical evaluation of the current state of knowledge. Ecol Modell 2016. [DOI: 10.1016/j.ecolmodel.2015.08.029] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Brooks BW, Lazorchak JM, Howard MDA, Johnson MVV, Morton SL, Perkins DAK, Reavie ED, Scott GI, Smith SA, Steevens JA. Are harmful algal blooms becoming the greatest inland water quality threat to public health and aquatic ecosystems? ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2016; 35:6-13. [PMID: 26771345 DOI: 10.1002/etc.3220] [Citation(s) in RCA: 199] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 06/17/2015] [Accepted: 08/24/2015] [Indexed: 05/22/2023]
Abstract
In this Focus article, the authors ask a seemingly simple question: Are harmful algal blooms (HABs) becoming the greatest inland water quality threat to public health and aquatic ecosystems? When HAB events require restrictions on fisheries, recreation, and drinking water uses of inland water bodies significant economic consequences result. Unfortunately, the magnitude, frequency, and duration of HABs in inland waters are poorly understood across spatiotemporal scales and differentially engaged among states, tribes, and territories. Harmful algal bloom impacts are not as predictable as those from conventional chemical contaminants, for which water quality assessment and management programs were primarily developed, because interactions among multiple natural and anthropogenic factors determine the likelihood and severity to which a HAB will occur in a specific water body. These forcing factors can also affect toxin production. Beyond site-specific water quality degradation caused directly by HABs, the presence of HAB toxins can negatively influence routine surface water quality monitoring, assessment, and management practices. Harmful algal blooms present significant challenges for achieving water quality protection and restoration goals when these toxins confound interpretation of monitoring results and environmental quality standards implementation efforts for other chemicals and stressors. Whether HABs presently represent the greatest threat to inland water quality is debatable, though in inland waters of developed countries they typically cause more severe acute impacts to environmental quality than conventional chemical contamination events. The authors identify several timely research needs. Environmental toxicology, environmental chemistry, and risk-assessment expertise must interface with ecologists, engineers, and public health practitioners to engage the complexities of HAB assessment and management, to address the forcing factors for HAB formation, and to reduce the threats posed to inland surface water quality.
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Affiliation(s)
- Bryan W Brooks
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Institute of Biomedical Studies, Baylor University, Waco, Texas, USA
| | - James M Lazorchak
- Office of Research and Development, US Environmental Protection Agency, Cincinnati, Ohio, USA
| | - Meredith D A Howard
- Southern California Coastal Water Research Project, Costa Mesa, California, USA
| | - Mari-Vaughn V Johnson
- Natural Resources Conservation Service, US Department of Agriculture, Temple, Texas, USA
| | - Steve L Morton
- National Centers for Coastal Ocean Science, Center for Coastal Environmental Health and Biomolecular Research, National Oceanic and Atmospheric Administration, Charleston, South Carolina, USA
| | - Dawn A K Perkins
- Wisconsin State Laboratory of Hygiene, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Euan D Reavie
- Natural Resources Research Institute, Center for Water and the Environment, University of Minnesota-Duluth, Duluth, Minnesota, USA
| | - Geoffrey I Scott
- Department of Environmental Health Science, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina, USA
| | | | - Jeffery A Steevens
- US Army Engineer Research and Development Center, Vicksburg, Mississippi, USA
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Wang FB. A PDE system modeling the competition and inhibition of harmful algae with seasonal variations. NONLINEAR ANALYSIS: REAL WORLD APPLICATIONS 2015; 25:258-275. [DOI: 10.1016/j.nonrwa.2015.02.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Xu Y, Peng H, Yang Y, Zhang W, Wang S. A cumulative eutrophication risk evaluation method based on a bioaccumulation model. Ecol Modell 2014. [DOI: 10.1016/j.ecolmodel.2014.07.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hambright KD, Beyer JE, Easton JD, Zamor RM, Easton AC, Hallidayschult TC. The niche of an invasive marine microbe in a subtropical freshwater impoundment. ISME JOURNAL 2014; 9:256-64. [PMID: 24950108 DOI: 10.1038/ismej.2014.103] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Revised: 05/09/2014] [Accepted: 05/13/2014] [Indexed: 11/09/2022]
Abstract
Growing attention in aquatic ecology is focusing on biogeographic patterns in microorganisms and whether these potential patterns can be explained within the framework of general ecology. The long-standing microbiologist's credo 'Everything is everywhere, but, the environment selects' suggests that dispersal is not limiting for microbes, but that the environment is the primary determining factor in microbial community composition. Advances in molecular techniques have provided new evidence that biogeographic patterns exist in microbes and that dispersal limitation may actually have an important role, yet more recent study using extremely deep sequencing predicts that indeed everything is everywhere. Using a long-term field study of the 'invasive' marine haptophyte Prymnesium parvum, we characterize the environmental niche of P. parvum in a subtropical impoundment in the southern United States. Our analysis contributes to a growing body of evidence that indicates a primary role for environmental conditions, but not dispersal, in the lake-wide abundances and seasonal bloom patterns in this globally important microbe.
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Affiliation(s)
- K David Hambright
- 1] Plankton Ecology and Limnology Laboratory, Department of Biology, University of Oklahoma, Norman, OK, USA [2] Program in Ecology and Evolutionary Biology, Department of Biology, University of Oklahoma, Norman, OK, USA [3] Biological Station, Department of Biology, University of Oklahoma, Norman, OK, USA
| | - Jessica E Beyer
- 1] Plankton Ecology and Limnology Laboratory, Department of Biology, University of Oklahoma, Norman, OK, USA [2] Program in Ecology and Evolutionary Biology, Department of Biology, University of Oklahoma, Norman, OK, USA
| | - James D Easton
- 1] Plankton Ecology and Limnology Laboratory, Department of Biology, University of Oklahoma, Norman, OK, USA [2] Biological Station, Department of Biology, University of Oklahoma, Norman, OK, USA
| | - Richard M Zamor
- 1] Plankton Ecology and Limnology Laboratory, Department of Biology, University of Oklahoma, Norman, OK, USA [2] Program in Ecology and Evolutionary Biology, Department of Biology, University of Oklahoma, Norman, OK, USA
| | - Anne C Easton
- 1] Plankton Ecology and Limnology Laboratory, Department of Biology, University of Oklahoma, Norman, OK, USA [2] Biological Station, Department of Biology, University of Oklahoma, Norman, OK, USA
| | - Thayer C Hallidayschult
- 1] Plankton Ecology and Limnology Laboratory, Department of Biology, University of Oklahoma, Norman, OK, USA [2] Program in Ecology and Evolutionary Biology, Department of Biology, University of Oklahoma, Norman, OK, USA
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