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Impact of heavy metal exposure on biological control of a deadly amphibian pathogen by zooplankton

Arne Deknock, Frank Pasmans (UGent) , Robby van Leeuwenberg, Sarah Van Praet (UGent) , Niels De Troyer (UGent) , Tess Goessens (UGent) , Leni Lammens (UGent) , Stijn Bruneel (UGent) , Luc Lens (UGent) , An Martel (UGent) , et al.
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Abstract
Despite devastating effects on global biodiversity, efficient mitigation strategies against amphibian chytridiomycosis are lacking. Since the free-living pathogenic zoospores of Batrachochytrium dendrobatidis (Bd), the infective stage of this disease, can serve as a nutritious food source for components of zooplankton communities, these groups may act as biological control agents by eliminating zoospores from the aquatic environment. Such pathogen-predator interaction is, however, embedded in the aquatic food web structure and is therefore affected by abiotic factors interfering with these networks. Heavy metals, released from both natural and anthropogenic sources, are widespread contaminants of aquatic ecosystems and may interfere with planktonic communities and thus pathogen elimination rates. We investigated the interaction between zooplankton communities and chytridiomycosis infections in a Flemish agricultural region. Moreover, we also investigated the impact of heavy metal contamination, that was previously investigated in the region and presented in recent work, on zooplankton assemblages and chytridiomycosis infections. Finally, we tested the effect of sublethal concentrations of copper and zinc on Bd removal rates by Daphnia magna in a laboratory assay. Although zinc, copper, nickel and chromium were widely abundant pollutants, heavy metals were no driving force for zooplankton assemblages at our study locations. Moreover, our field survey did not reveal indirect effects of zooplankton assemblages on chytridiomycosis infections. However, sampling occasions testing negative for Bd showed a higher degree of copper contamination compared to positive sampling occasions, indicating a potential inhibitory effect of copper on Bd prevalence. Finally, whereas D. magna significantly reduced zoospore densities in its environment, sublethal concentrations of copper and zinc showed no interference with pathogen removal in the laboratory assay. Our results provide perspectives for further research on such a biological control strategy against chytridiomycosis by optimizing environmental conditions for pathogen predation.
Keywords
Pollution, Waste Management and Disposal, Environmental Chemistry, Environmental Engineering, Chytridiomycosis, Heavy metals, Zooplankton, Zoospores, Amphibians, Pathogen predation, ENVIRONMENTAL RISK-ASSESSMENT, DAPHNIA-MAGNA, BATRACHOCHYTRIUM-DENDROBATIDIS, ACUTE TOXICITY, COPPER, WATER, ZINC, ZN, VALIDATION, CHEMICALS

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MLA
Deknock, Arne, et al. “Impact of Heavy Metal Exposure on Biological Control of a Deadly Amphibian Pathogen by Zooplankton.” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 823, 2022, doi:10.1016/j.scitotenv.2022.153800.
APA
Deknock, A., Pasmans, F., van Leeuwenberg, R., Van Praet, S., De Troyer, N., Goessens, T., … Goethals, P. (2022). Impact of heavy metal exposure on biological control of a deadly amphibian pathogen by zooplankton. SCIENCE OF THE TOTAL ENVIRONMENT, 823. https://doi.org/10.1016/j.scitotenv.2022.153800
Chicago author-date
Deknock, Arne, Frank Pasmans, Robby van Leeuwenberg, Sarah Van Praet, Niels De Troyer, Tess Goessens, Leni Lammens, et al. 2022. “Impact of Heavy Metal Exposure on Biological Control of a Deadly Amphibian Pathogen by Zooplankton.” SCIENCE OF THE TOTAL ENVIRONMENT 823. https://doi.org/10.1016/j.scitotenv.2022.153800.
Chicago author-date (all authors)
Deknock, Arne, Frank Pasmans, Robby van Leeuwenberg, Sarah Van Praet, Niels De Troyer, Tess Goessens, Leni Lammens, Stijn Bruneel, Luc Lens, An Martel, Siska Croubels, and Peter Goethals. 2022. “Impact of Heavy Metal Exposure on Biological Control of a Deadly Amphibian Pathogen by Zooplankton.” SCIENCE OF THE TOTAL ENVIRONMENT 823. doi:10.1016/j.scitotenv.2022.153800.
Vancouver
1.
Deknock A, Pasmans F, van Leeuwenberg R, Van Praet S, De Troyer N, Goessens T, et al. Impact of heavy metal exposure on biological control of a deadly amphibian pathogen by zooplankton. SCIENCE OF THE TOTAL ENVIRONMENT. 2022;823.
IEEE
[1]
A. Deknock et al., “Impact of heavy metal exposure on biological control of a deadly amphibian pathogen by zooplankton,” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 823, 2022.
@article{8741133,
  abstract     = {{Despite devastating effects on global biodiversity, efficient mitigation strategies against amphibian chytridiomycosis are lacking. Since the free-living pathogenic zoospores of Batrachochytrium dendrobatidis (Bd), the infective stage of this disease, can serve as a nutritious food source for components of zooplankton communities, these groups may act as biological control agents by eliminating zoospores from the aquatic environment. Such pathogen-predator interaction is, however, embedded in the aquatic food web structure and is therefore affected by abiotic factors interfering with these networks. Heavy metals, released from both natural and anthropogenic sources, are widespread contaminants of aquatic ecosystems and may interfere with planktonic communities and thus pathogen elimination rates. We investigated the interaction between zooplankton communities and chytridiomycosis infections in a Flemish agricultural region. Moreover, we also investigated the impact of heavy metal contamination, that was previously investigated in the region and presented in recent work, on zooplankton assemblages and chytridiomycosis infections. Finally, we tested the effect of sublethal concentrations of copper and zinc on Bd removal rates by Daphnia magna in a laboratory assay. Although zinc, copper, nickel and chromium were widely abundant pollutants, heavy metals were no driving force for zooplankton assemblages at our study locations. Moreover, our field survey did not reveal indirect effects of zooplankton assemblages on chytridiomycosis infections. However, sampling occasions testing negative for Bd showed a higher degree of copper contamination compared to positive sampling occasions, indicating a potential inhibitory effect of copper on Bd prevalence. Finally, whereas D. magna significantly reduced zoospore densities in its environment, sublethal concentrations of copper and zinc showed no interference with pathogen removal in the laboratory assay. Our results provide perspectives for further research on such a biological control strategy against chytridiomycosis by optimizing environmental conditions for pathogen predation.}},
  articleno    = {{153800}},
  author       = {{Deknock, Arne and Pasmans, Frank and van Leeuwenberg, Robby and Van Praet, Sarah and De Troyer, Niels and Goessens, Tess and Lammens, Leni and Bruneel, Stijn and Lens, Luc and Martel, An and Croubels, Siska and Goethals, Peter}},
  issn         = {{0048-9697}},
  journal      = {{SCIENCE OF THE TOTAL ENVIRONMENT}},
  keywords     = {{Pollution,Waste Management and Disposal,Environmental Chemistry,Environmental Engineering,Chytridiomycosis,Heavy metals,Zooplankton,Zoospores,Amphibians,Pathogen predation,ENVIRONMENTAL RISK-ASSESSMENT,DAPHNIA-MAGNA,BATRACHOCHYTRIUM-DENDROBATIDIS,ACUTE TOXICITY,COPPER,WATER,ZINC,ZN,VALIDATION,CHEMICALS}},
  language     = {{eng}},
  pages        = {{11}},
  title        = {{Impact of heavy metal exposure on biological control of a deadly amphibian pathogen by zooplankton}},
  url          = {{http://doi.org/10.1016/j.scitotenv.2022.153800}},
  volume       = {{823}},
  year         = {{2022}},
}

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