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Santos CSA, Loureiro S, Sotillo A, Müller W, Stienen EWM, De Neve L, Lens L, Monteiro MS. Assay optimisation and age-related baseline variation in biochemical markers in Lesser Black-backed gulls. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 172:246-254. [PMID: 30711859 DOI: 10.1016/j.ecoenv.2019.01.084] [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: 09/24/2018] [Revised: 01/22/2019] [Accepted: 01/25/2019] [Indexed: 06/09/2023]
Abstract
Free-ranging animals are often used as bioindicators of both short- and long-term changes in ecosystem health, mainly to detect the presence and effects of contaminants. Birds, and gulls in particular, have been used as bioindicators over a broad range of marine and terrestrial ecosystems. In this study, we standardise the conditions for the use of a suite of biochemical markers in non-destructive matrices of Lesser Black-backed Gull (Larus fuscus) to facilitate future biomonitoring of marine and terrestrial contaminants. We characterized cholinesterase (ChE) in plasma and optimized assay conditions for ChE activity as a marker of neurotoxic damage. Moreover, we quantified variation in activity of ChE, lactate dehydrogenase (LDH), glutathione-S-transferase (GST) and catalase (CAT) as well as variation ranges of lipid peroxidation (LPO), in free-ranging adults and captive chicks. The main ChE form present in plasma of both adults and chicks was butyrylcholinesterase (BChE) followed by acetylcholinesterase (AChE), whose relative proportion in plasma tended to decrease with increased chick age. LPO levels and GST activity in blood cells (BCs) decreased significantly with increasing chick age, while BChE and LDH activity in plasma were not age-dependent. CAT in BCs tended to decline non-significantly in older chicks. Results of this study underscore the importance of standardising assay conditions and assessing intrinsic baseline variation in biochemical markers, before biochemical quantification. Data presented here provide a foundation for future use of BChE and LDH activity in plasma, as well as oxidative stress markers (LPO, CAT and GST) in BCs, to monitor environmental stress effects in Lesser Black-backed gulls.
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Affiliation(s)
- Cátia S A Santos
- Department of Biology, Terrestrial Ecology Unit, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium; Department of Biology & CESAM, Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - Susana Loureiro
- Department of Biology & CESAM, Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Alejandro Sotillo
- Department of Biology, Terrestrial Ecology Unit, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium; Department of Biology & CESAM, Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Wendt Müller
- Department of Biology - Behavioural Ecology and Ecophysiology Group, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Antwerp, Belgium
| | - Eric W M Stienen
- Research Institute for Nature and Forest (INBO), Havenlaan 88 Bus 73, 1000 Brussels, Belgium
| | - Liesbeth De Neve
- Department of Biology, Terrestrial Ecology Unit, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium
| | - Luc Lens
- Department of Biology, Terrestrial Ecology Unit, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium
| | - Marta S Monteiro
- Department of Biology & CESAM, Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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Silva ARR, Santos CSA, Ferreira NGC, Morgado R, Cardoso DN, Cruz A, Mendo S, Soares AMVM, Loureiro S. Multigenerational effects of carbendazim in Daphnia magna: From a subcellular to a population level. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2019; 38:412-422. [PMID: 30508263 DOI: 10.1002/etc.4307] [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: 06/05/2018] [Revised: 07/10/2018] [Accepted: 10/29/2018] [Indexed: 06/09/2023]
Abstract
Anthropogenic activities such as the use of pesticides may affect aquatic biota populations, due to potential agricultural runoffs or disposals. Carbendazim is one example of a widely used fungicide with a high potential to end up in aquatic ecosystems through runoff. Deleterious effects observed at the individual level are possibly explained by changes in homeostasis at the cellular level, and both factors can then be used to predict effects at the population level. In the present study, an isoclonal population of Daphnia magna (clone K6) was exposed to a concentration that mimics relevant levels of carbendazim in the environment over 12 generations. The effects of carbendazim were assessed in some generations using the following endpoints: biochemical biomarkers (cholinesterase, catalase, and glutathione-S-transferase), lipid peroxidation and energy-related parameters (carbohydrates, lipids, and proteins along with available energy and energy consumption), parental longevity, and population growth (r). Long-term exposure to carbendazim had no effect on the intrinsic rate of natural increase (r) of adult D. magna, but longevity was decreased at the F12 generation compared to that of control. Differences between the exposed and nonexposed populations were found for cholinesterase, glutathione-S-transferase, and lipid peroxidation. However, for catalase and energy-related parameters, no differences were observed between these 2 populations. Natural variability was seen throughout the test period, under control conditions, within the 12 generations. Overall, carbendazim induced some effects at the subcellular level that translated into changes in longevity but these later vanished in terms of population effects. Environ Toxicol Chem 2019;38:412-422. © 2018 SETAC.
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Affiliation(s)
- Ana Rita R Silva
- Department of Biology and Center for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
| | - Cátia S A Santos
- Department of Biology and Center for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
- Department of Biology, Terrestrial Ecology Unit, Ghent University, Ghent, Belgium
| | - Nuno G C Ferreira
- Department of Biology and Center for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
| | - Rui Morgado
- Department of Biology and Center for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
| | - Diogo N Cardoso
- Department of Biology and Center for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
| | - Andreia Cruz
- Department of Biology and Center for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
| | - Sónia Mendo
- Department of Biology and Center for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
| | - Amadeu M V M Soares
- Department of Biology and Center for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
| | - Susana Loureiro
- Department of Biology and Center for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
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Krosch MN, Bryant LM, Vink S. Differential gene expression of Australian Cricotopus draysoni (Diptera: Chironomidae) populations reveals seasonal association in detoxification gene regulation. Sci Rep 2017; 7:14263. [PMID: 29079848 PMCID: PMC5660232 DOI: 10.1038/s41598-017-14736-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 10/16/2017] [Indexed: 12/03/2022] Open
Abstract
Understanding the molecular mechanisms of organismal response to human-derived ecosystem change is recognised as a critical tool in monitoring and managing impacts, especially in freshwater systems. Fundamental to this approach is to determine the genes involved in responding to ecosystem change and detect modifications to their expression and activity in natural populations. Potential targets for this approach include well-known detoxification genes that are upregulated in response to stress. Here, we tested whether expression of such genes varied in association with differences in ecosystem health and could be detected in the field. We sampled populations of the freshwater midge, Cricotopus draysoni, from two geographically proximate sites in southeast Queensland, Australia, which differed in their ecosystem health, at multiple time points. We assessed transcriptome-level differential gene expression and predicted greatest differential expression between sites, associated with organismal responses to local physico-chemical factors. In contrast, we observed a clear and dramatic difference in gene expression – including of known detoxification genes – between time points, specifically between periods at the start and end of the austral summer rainfall when in-stream water levels are most different. These data suggest that these waterways experience greatest pollution load when water levels are high following rainfall events.
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Affiliation(s)
- Matt N Krosch
- Queensland University of Technology, Brisbane, QLD, 4001, Australia. .,University of Queensland, St Lucia, QLD, 4072, Australia.
| | | | - Sue Vink
- University of Queensland, St Lucia, QLD, 4072, Australia
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