Open AccessIntrogression dynamics from invasive pigs into wild boar following the March 2011 natural and anthropogenic disasters at Fukushima
Author(s) -
Donovan Anderson,
Yuki Negishi,
Hiroko Ishiniwa,
Kei Okuda,
Thomas G. Hinton,
Rio Toma,
Junco Nagata,
Hideo Tamate,
Shingo Kaneko
Publication year - 2021
Publication title -
proceedings - royal society. biological sciences/proceedings - royal society. biological sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.342
H-Index - 253
eISSN - 1471-2954
pISSN - 0962-8452
DOI - 10.1098/rspb.2021.0874
Subject(s) - wild boar , introgression , biological dispersal , biology , domestic pig , range (aeronautics) , gene flow , invasive species , domestication , outbreak , ecology , zoology , geography , genetic variation , demography , population , gene , composite material , materials science , sociology , forestry , biochemistry , virology
Natural and anthropogenic disasters have the capability to cause sudden extrinsic environmental changes and long-lasting perturbations including invasive species, species expansion and influence evolution as selective pressures force adaption. Such disasters occurred on 11 March 2011, in Fukushima, Japan, when an earthquake, tsunami and meltdown of a nuclear power plant all drastically reformed anthropogenic land use. Using genetic data, we demonstrate how wild boar ( Sus scrofa leucomystax ) have persevered against these environmental changes, including an invasion of escaped domestic pigs ( Sus scrofa domesticus ). Concurrently, we show evidence of successful hybridization between pigs and native wild boar in this area; however in future offspring, the pig legacy has been diluted through time. We speculate that the range expansion dynamics inhibit long-term introgression and introgressed alleles will continue to decrease at each generation while only maternally inherited organelles will persist. Using the gene flow data among wild boar, we assume that offspring from hybrid lineages will continue dispersal north at low frequencies as climates warm. We conclude that future risks for wild boar in this area include intraspecies competition, revitalization of human-related disruptions and disease outbreaks.