Evidence map›Paper›PMID 26372955›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2015

Suburbanization, estrogen contamination, and sex ratio in wild amphibian populations.

Max R Lambert, Geoffrey S J Giller, Larry B Barber, Kevin C Fitzgerald, David K Skelly

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
5.6field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

34 citing papers in PubMed, 109 citations in OpenAlex.

  1. Article
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  4. Bacterial estrogenesis without oxygen: Wood-Ljungdahl pathway likely contributed to the emergence of estrogens in the biosphere.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  5. Review
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  14. Review
  15. Reconnaissance of Surface Water Estrogenicity and the Prevalence of Intersex in Smallmouth Bass (International journal of environmental research and public health · 2020
    Article
  16. Retroconversion of estrogens into androgens by bacteria via a cobalamin-mediated methylation.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  17. Review
  18. Article
  19. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Max R LambertSchool of Forestry and Environmental Studies, Yale University, New Haven, CT 06511; max.lambert@yale.edu.
Geoffrey S J GillerSchool of Forestry and Environmental Studies, Yale University, New Haven, CT 06511;
Larry B BarberU.S. Geological Survey, Boulder, CO 80303.
Kevin C FitzgeraldU.S. Geological Survey, Boulder, CO 80303.
David K SkellySchool of Forestry and Environmental Studies, Yale University, New Haven, CT 06511;
Yale University · USUnited States Geological Survey · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Research on endocrine disruption in frog populations, such as shifts in sex ratios and feminization of males, has predominantly focused on agricultural pesticides. Recent evidence suggests that suburban landscapes harbor amphibian populations exhibiting similar levels of endocrine disruption; however the endocrine disrupting chemical (EDC) sources are unknown. Here, we show that sex ratios of metamorphosing frogs become increasingly female-dominated along a suburbanization gradient. We further show that suburban ponds are frequently contaminated by the classical estrogen estrone and a variety of EDCs produced by plants (phytoestrogens), and that the diversity of organic EDCs is correlated with the extent of developed land use and cultivated lawn and gardens around a pond. Our work also raises the possibility that trace-element contamination associated with human land use around suburban ponds may be contributing to the estrogenic load within suburban freshwaters and constitutes another source of estrogenic exposure for wildlife. These data suggest novel, unexplored pathways of EDC contamination in human-altered environments. In particular, we propose that vegetation changes associated with suburban neighborhoods (e.g., from forests to lawns and ornamental plants) increase the distribution of phytoestrogens in surface waters. The result of frog sex ratios varying as a function of human land use implicates a role for environmental modulation of sexual differentiation in amphibians, which are assumed to only have genetic sex determination. Overall, we show that endocrine disruption is widespread in suburban frog populations and that the causes are likely diverse.

Indexed as

Sex RatioSuburban PopulationAmphibiansAnimalsAnimals, WildConnecticutEndocrine DisruptorsEstrogensFemaleForestsHumansMaleMetamorphosis, BiologicalPondsRanidaeWater Pollutants, ChemicalEndocrine DisruptorsEstrogensWater Pollutants, Chemicalenvironmental sex determinationestronelandscapinglawnphytoestrogen

Identifiers

PMID26372955
PMCPMC4586825
OpenAlexW1946611173

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.