11429139

Source:http://linkedlifedata.com/resource/pubmed/id/11429139

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0005516, umls-concept:C0020942, umls-concept:C0032659, umls-concept:C0205296, umls-concept:C0332120
pubmed:issue	1474
pubmed:dateCreated	2001-6-28
pubmed:abstractText	Population bottlenecks are often invoked to explain low levels of genetic variation in natural populations, yet few studies have documented the direct genetic consequences of known bottlenecks in the wild. Empirical studies of natural population bottlenecks are therefore needed, because key assumptions of theoretical and laboratory studies of bottlenecks may not hold in the wild. Here we present microsatellite data from a severe bottleneck (95% mortality) in an insular population of song sparrows (Melospiza melodia). The major findings of our study are as follows: (i) The bottleneck reduced heterozygosity and allelic diversity nearly to neutral expectations, despite non-random survival of birds with respect to inbreeding and wing length. (ii) All measures of genetic diversity regained pre-bottleneck levels within two to three years of the crash. This rapid recovery was due to low levels of immigration. (iii) The rapid recovery occurred despite a coincident, strong increase in average inbreeding. These results show that immigration at levels that are hard to measure in most field studies can lead to qualitatively very different genetic outcomes from those expected from mutations only. We suggest that future theoretical and empirical work on bottlenecks and metapopulations should address the impact of immigration.
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/101245157
pubmed:citationSubset	IM
pubmed:status	MEDLINE
pubmed:month	Jul
pubmed:issn	0962-8452
pubmed:author	pubmed-author:ArcesePP, pubmed-author:BeaumontM AMA, pubmed-author:BrufordM WMW, pubmed-author:HochachkaW MWM, pubmed-author:JefferyK JKJ, pubmed-author:KellerL FLF, pubmed-author:SmithJ NJN
pubmed:issnType	Print
pubmed:day	7
pubmed:volume	268
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	1387-94
pubmed:dateRevised	2008-11-21
pubmed:meshHeading	pubmed-meshheading:11429139-Animals, pubmed-meshheading:11429139-Behavior, Animal, pubmed-meshheading:11429139-Genetic Variation, pubmed-meshheading:11429139-Genetics, Population, pubmed-meshheading:11429139-Microsatellite Repeats, pubmed-meshheading:11429139-Songbirds
pubmed:year	2001
pubmed:articleTitle	Immigration and the ephemerality of a natural population bottleneck: evidence from molecular markers.
pubmed:affiliation	Division of Environmental and Evolutionary Biology, Institute of Biomedical and Life Sciences, Graham Kerr Building, University of Glasgow, Glasgow G12 8QQ, UK.
pubmed:publicationType	Journal Article, Research Support, Non-U.S. Gov't