Evidence map›Paper›PMID 27746026›Full record

ArticleCurrent biology : CB2016

Genomic Consequences of Population Decline in the Endangered Florida Scrub-Jay.

Nancy Chen, Elissa J Cosgrove, Reed Bowman, John W Fitzpatrick, Andrew G Clark

Abstract read
In one paragraph

Article in Current biology : CB, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
–field-weighted citation impact
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

42 citing papers in PubMed.

  1. Article
  2. Indirect genetic effects across ontogeny in an avian cooperative breeder.bioRxiv : the preprint server for biology · 2026
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  10. Inbreeding reduces fitness in spatially structured populations of a threatened rattlesnake.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
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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.

Nancy ChenCenter for Population Biology and Department of Evolution and Ecology, University of California, Davis, Davis, CA 95616, USA; Cornell Lab of Ornithology, Cornell University, Ithaca, NY 14850, USA. Electronic address: nanchen@ucdavis.edu.
Elissa J CosgroveDepartment of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA.
Reed BowmanArchbold Biological Station, Venus, FL 33960, USA.
John W FitzpatrickCornell Lab of Ornithology, Cornell University, Ithaca, NY 14850, USA; Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA.
Andrew G ClarkDepartment of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA; Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA.

Funding

Genome-wide approaches to polygenic adaptationR01GM108779 · NIGMS · UNIVERSITY OF CALIFORNIA AT DAVIS · PI COOP, GRAHAM · 2014 to 2019
$1.0M
NIGMS NIH HHS R01 GM108779
6 · The paper itself

Abstract

Understanding the population genetic consequences of declining population size is important for conserving the many species worldwide facing severe decline [1]. Thorough empirical studies on the impacts of population reduction at a genome-wide scale in the wild are scarce because they demand huge field and laboratory investments [1, 2]. Previous studies have demonstrated the importance of gene flow in introducing genetic variation to small populations [3], but few have documented both genetic and fitness consequences of decreased immigration through time in a natural population [4-6]. Here we assess temporal variation in gene flow, inbreeding, and fitness using longitudinal genomic, demographic, and phenotypic data from a long-studied population of federally Threatened Florida scrub-jays (Aphelocoma coerulescens). We exhaustively sampled and genotyped the study population over two decades, providing one of the most detailed longitudinal investigations of genetics in a wild animal population to date. Immigrants were less heterozygous than residents but still introduced genetic variation into our study population. Owing to regional population declines, immigration into the study population declined from 1995-2013, resulting in increased levels of inbreeding and reduced fitness via inbreeding depression, even as the population remained demographically stable. Our results show that, contrary to conventional wisdom, small peripheral populations that already have undergone a genetic bottleneck may play a vital role in preserving genetic diversity of larger and seemingly stable populations. These findings underscore the importance of investing in the persistence of small populations and maintaining population connectivity in conservation of fragmented species.

Indexed as

Gene FlowGenetic FitnessGenomeInbreedingAnimalsEndangered SpeciesFloridaLife History TraitsPhenotypePopulation DynamicsSongbirdsconservation genomicsgene flowhabitat fragmentationinbreeding depressionpopulation genetics

Identifiers

PMID27746026
PMCPMC5102777

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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.