Counterbalancing effects of maternal mercury exposure during different stages of early ontogeny in American toads

Christine M. Bergeron; William A. Hopkins; Catherine M. Bodinof; Sarah A. Budischak; Haruka Wada; Jason M. Unrine

doi:10.1016/j.scitotenv.2011.07.036

Counterbalancing effects of maternal mercury exposure during different stages of early ontogeny in American toads

Christine M. Bergeron
, William A. Hopkins
, Catherine M. Bodinof
, Sarah A. Budischak
, Haruka Wada
, Jason M. Unrine

Producción científica: Article › revisión exhaustiva

15 Citas (Scopus)

Resumen

Maternal transfer of environmental contaminants is a disadvantageous parental effect which can have long-lasting implications for offspring fitness. We investigated the effects of mercury (Hg) on the reproductive success of female amphibians and the subsequent effects of maternal transfer on the development of their offspring. American toads (Bufo americanus) maternally transferred Hg to their eggs, and there was a negative relationship between Hg concentrations and the percentage of viable hatchlings produced in clutches. However, when we continued to monitor larvae that successfully hatched, we found 21% greater metamorphic success in larvae from Hg-exposed mothers compared to reference larvae. The negative effect in the embryonic stage and positive effect in the larval stage counterbalanced one another, ultimately resulting in no difference in predicted terrestrial recruitment, regardless of maternal Hg exposure. Our findings demonstrate that maternal effects on survival manifesting at different stages in ontogeny have the potential to produce complicated outcomes.

Idioma original	English
Páginas (desde-hasta)	4746-4752
Número de páginas	7
Publicación	Science of the Total Environment
Volumen	409
N.º	22
DOI	https://doi.org/10.1016/j.scitotenv.2011.07.036
Estado	Published - oct 15 2011

Nota bibliográfica

Funding Information:
We thank the landowners along the South River and the Waynesboro Parks and Recreation Department for access to sampling locations, and D. Cristol, J. Schmerfeld, H. Brant, J. Burke, J. Callihan, S. DuRant, and S. Orlofske for their support and field and/or laboratory assistance. We thank B. Todd, C. Rowe, and J. Willson for reviewing earlier drafts of this manuscript. Collection of animals was in conformance with appropriate permits, and sample methods were in compliance with Virginia Tech animal care and use protocols. Research was completed with oversight from the South River Science Team which is a collaboration of state and federal agencies, academic institutions, and environmental interests. Financial support to WAH was provided by E.I. DuPont de Nemours , startup funds from Virginia Tech , and by the National Science Foundation (NSF # IOB-0615361 ). During the preparation of this manuscript, CMB was supported by the U.S. EPA STAR Graduate Fellowship ( FP-9170040-1 ). The information presented here has not been subjected to review by the supporting agencies and no official endorsement should be inferred.

Financiación

We thank the landowners along the South River and the Waynesboro Parks and Recreation Department for access to sampling locations, and D. Cristol, J. Schmerfeld, H. Brant, J. Burke, J. Callihan, S. DuRant, and S. Orlofske for their support and field and/or laboratory assistance. We thank B. Todd, C. Rowe, and J. Willson for reviewing earlier drafts of this manuscript. Collection of animals was in conformance with appropriate permits, and sample methods were in compliance with Virginia Tech animal care and use protocols. Research was completed with oversight from the South River Science Team which is a collaboration of state and federal agencies, academic institutions, and environmental interests. Financial support to WAH was provided by E.I. DuPont de Nemours , startup funds from Virginia Tech , and by the National Science Foundation (NSF # IOB-0615361 ). During the preparation of this manuscript, CMB was supported by the U.S. EPA STAR Graduate Fellowship ( FP-9170040-1 ). The information presented here has not been subjected to review by the supporting agencies and no official endorsement should be inferred.

Financiadores	Número del financiador
E.I. DuPont de Nemours
National Science Foundation (NSF)	IOB-0615361
U.S. Environmental Protection Agency	FP-9170040-1
Virginia Polytechnic Institute and State University

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution

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10.1016/j.scitotenv.2011.07.036

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title = "Counterbalancing effects of maternal mercury exposure during different stages of early ontogeny in American toads",

abstract = "Maternal transfer of environmental contaminants is a disadvantageous parental effect which can have long-lasting implications for offspring fitness. We investigated the effects of mercury (Hg) on the reproductive success of female amphibians and the subsequent effects of maternal transfer on the development of their offspring. American toads (Bufo americanus) maternally transferred Hg to their eggs, and there was a negative relationship between Hg concentrations and the percentage of viable hatchlings produced in clutches. However, when we continued to monitor larvae that successfully hatched, we found 21\% greater metamorphic success in larvae from Hg-exposed mothers compared to reference larvae. The negative effect in the embryonic stage and positive effect in the larval stage counterbalanced one another, ultimately resulting in no difference in predicted terrestrial recruitment, regardless of maternal Hg exposure. Our findings demonstrate that maternal effects on survival manifesting at different stages in ontogeny have the potential to produce complicated outcomes.",

keywords = "Amphibian, Maternal effects, Maternal transfer, Mercury",

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note = "Funding Information: We thank the landowners along the South River and the Waynesboro Parks and Recreation Department for access to sampling locations, and D. Cristol, J. Schmerfeld, H. Brant, J. Burke, J. Callihan, S. DuRant, and S. Orlofske for their support and field and/or laboratory assistance. We thank B. Todd, C. Rowe, and J. Willson for reviewing earlier drafts of this manuscript. Collection of animals was in conformance with appropriate permits, and sample methods were in compliance with Virginia Tech animal care and use protocols. Research was completed with oversight from the South River Science Team which is a collaboration of state and federal agencies, academic institutions, and environmental interests. Financial support to WAH was provided by E.I. DuPont de Nemours , startup funds from Virginia Tech , and by the National Science Foundation (NSF \# IOB-0615361 ). During the preparation of this manuscript, CMB was supported by the U.S. EPA STAR Graduate Fellowship ( FP-9170040-1 ). The information presented here has not been subjected to review by the supporting agencies and no official endorsement should be inferred. ",

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AU - Wada, Haruka

AU - Unrine, Jason M.

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N2 - Maternal transfer of environmental contaminants is a disadvantageous parental effect which can have long-lasting implications for offspring fitness. We investigated the effects of mercury (Hg) on the reproductive success of female amphibians and the subsequent effects of maternal transfer on the development of their offspring. American toads (Bufo americanus) maternally transferred Hg to their eggs, and there was a negative relationship between Hg concentrations and the percentage of viable hatchlings produced in clutches. However, when we continued to monitor larvae that successfully hatched, we found 21% greater metamorphic success in larvae from Hg-exposed mothers compared to reference larvae. The negative effect in the embryonic stage and positive effect in the larval stage counterbalanced one another, ultimately resulting in no difference in predicted terrestrial recruitment, regardless of maternal Hg exposure. Our findings demonstrate that maternal effects on survival manifesting at different stages in ontogeny have the potential to produce complicated outcomes.

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Counterbalancing effects of maternal mercury exposure during different stages of early ontogeny in American toads

Resumen

Nota bibliográfica

Financiación

ASJC Scopus subject areas

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Huella

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