Songbird genetic diversity is lower in anthropogenically versus naturally fragmented landscapes
Identifieur interne : 000570 ( Main/Exploration ); précédent : 000569; suivant : 000571Songbird genetic diversity is lower in anthropogenically versus naturally fragmented landscapes
Auteurs : Elizabeth A. Macdougall-Shackleton [Canada] ; Michael Clinchy [Canada] ; Liana Zanette [Canada] ; Bryan D. Neff [Canada]Source :
- Conservation Genetics [ 1566-0621 ] ; 2011.
English descriptors
- Teeft :
- Allele, Allele frequency, Annual reproductive success, Anthropogenic fragmentation, Anthropogenically, Anthropogenically fragmented landscape, Anthropogenically fragmented population, Arbutus point, Arcese, Assignment test, Bottleneck, Brood parasitism, Census size, Clinchy, Coastal, Coastal island, Coastal island site, Conserv, Conserv genet, Contemporary dispersal, Demographic process, Different landscape, Different rate, Dispersal, Ecol, Effective population size, Emily carr, Forest fragmentation, Fragmented, Fragmented counterpart, Fragmented landscape, Fragmented population, Gene flow, Genet, Genetic, Genetic differentiation, Genetic distance, Genetic diversity, Genetic implication, Genetic similarity, Genetic variation, Geographic distance, Geographic variation, Greater geographic distance, Habitat fragment, Habitat fragmentation, Habitat patch, Heterozygosity, Housing development, Human activity, Individual genetic diversity, Island population, Keller, Keyghobadi, Landscape, Landscape difference, Landscape type, Less able, Locus, Mandarte island, Mate choice, Mating strategy, Matrix, Melodia, Melospiza, Melospiza melodia, Microsatellite, Microsatellite genotype, Microsatellite locus, Nest predation, Open water, Other potential mate, Overall genetic similarity, Pairwise, Pairwise geographic distance, Pairwise matrix, Pellow islet, Philos trans, Population genetic, Population history, Population size, Population structure, Posterior probability, Potential mate, Potential recruit, Predator, Predator pressure, Proc natl acad, Recent change, Recent population decline, Reproductive, Reproductive success, Royal cove, Same site, Shell beach, Sign test, Significant difference, Site pair, Small coastal island, Social mate, Song sparrow, Sparrow, Study site, Swan lake, Swan lake east, Swan lake west, Tortoise island, Tree glen, Urban bird, Urban island, Urban island site, Urban landscape, Urban matrix, Urban site, Vancouver island, Vole meadow, Zanette.
Abstract
Abstract: Natural habitats, and the populations they sustain, are becoming increasingly fragmented by human activities. Parallels between ‘true’ islands and ‘habitat’ islands suggest that standing levels of individual genetic diversity in naturally fragmented populations may predict the genetic fate of their anthropogenically fragmented counterparts, but this hypothesis remains largely untested. We compared neutral-locus genetic diversity of individual song sparrows (Melospiza melodia) breeding in a naturally fragmented landscape (small coastal islands) to that of song sparrows in similar-sized ‘urban islands’ separated by roads and housing developments rather than by water. Individuals on coastal islands were more heterozygous and less inbred than those in urban islands. Estimates of population genetic structuring (assessed by pairwise genetic differentiation and Bayesian clustering methods) and contemporary dispersal (based on assignment tests) revealed little structure within either landscape, suggesting that lack of connectivity at the geographic scale we investigated cannot explain the reduced heterozygosity of urban birds. However, within-site genetic similarity was higher in the urban than the coastal landscape. Assuming that historic genetic diversity was similar in these two environments, our findings suggest that anthropogenically fragmented populations may lose genetic diversity faster than their naturally fragmented counterparts.
Url:
DOI: 10.1007/s10592-011-0222-0
Affiliations:
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Neff</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Biology, University of Western Ontario, 1151 Richmond Avenue, N6A 5B7, London, ON</wicri:regionArea><wicri:noRegion>ON</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Conservation Genetics</title><title level="j" type="abbrev">Conserv Genet</title><idno type="ISSN">1566-0621</idno><idno type="eISSN">1572-9737</idno><imprint><publisher ref="https://scientific-publisher.data.istex.fr/ark:/67375/H02-SWLMH5L1-1">Springer Netherlands</publisher><pubPlace>Dordrecht</pubPlace><date type="published" when="2011">2011</date><biblScope unit="vol" from="12" to="12">12</biblScope><biblScope unit="issue" from="5" to="5">5</biblScope><biblScope unit="page" from="1195">1195</biblScope><biblScope unit="page" to="1203">1203</biblScope></imprint><idno type="ISSN">1566-0621</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1566-0621</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Allele</term><term>Allele frequency</term><term>Annual reproductive success</term><term>Anthropogenic fragmentation</term><term>Anthropogenically</term><term>Anthropogenically fragmented landscape</term><term>Anthropogenically fragmented population</term><term>Arbutus point</term><term>Arcese</term><term>Assignment test</term><term>Bottleneck</term><term>Brood parasitism</term><term>Census size</term><term>Clinchy</term><term>Coastal</term><term>Coastal island</term><term>Coastal island site</term><term>Conserv</term><term>Conserv genet</term><term>Contemporary dispersal</term><term>Demographic process</term><term>Different landscape</term><term>Different rate</term><term>Dispersal</term><term>Ecol</term><term>Effective population size</term><term>Emily carr</term><term>Forest fragmentation</term><term>Fragmented</term><term>Fragmented counterpart</term><term>Fragmented landscape</term><term>Fragmented population</term><term>Gene flow</term><term>Genet</term><term>Genetic</term><term>Genetic differentiation</term><term>Genetic distance</term><term>Genetic diversity</term><term>Genetic implication</term><term>Genetic similarity</term><term>Genetic variation</term><term>Geographic distance</term><term>Geographic variation</term><term>Greater geographic distance</term><term>Habitat fragment</term><term>Habitat fragmentation</term><term>Habitat patch</term><term>Heterozygosity</term><term>Housing development</term><term>Human activity</term><term>Individual genetic diversity</term><term>Island population</term><term>Keller</term><term>Keyghobadi</term><term>Landscape</term><term>Landscape difference</term><term>Landscape type</term><term>Less able</term><term>Locus</term><term>Mandarte island</term><term>Mate choice</term><term>Mating strategy</term><term>Matrix</term><term>Melodia</term><term>Melospiza</term><term>Melospiza melodia</term><term>Microsatellite</term><term>Microsatellite genotype</term><term>Microsatellite locus</term><term>Nest predation</term><term>Open water</term><term>Other potential mate</term><term>Overall genetic similarity</term><term>Pairwise</term><term>Pairwise geographic distance</term><term>Pairwise matrix</term><term>Pellow islet</term><term>Philos trans</term><term>Population genetic</term><term>Population history</term><term>Population size</term><term>Population structure</term><term>Posterior probability</term><term>Potential mate</term><term>Potential recruit</term><term>Predator</term><term>Predator pressure</term><term>Proc natl acad</term><term>Recent change</term><term>Recent population decline</term><term>Reproductive</term><term>Reproductive success</term><term>Royal cove</term><term>Same site</term><term>Shell beach</term><term>Sign test</term><term>Significant difference</term><term>Site pair</term><term>Small coastal island</term><term>Social mate</term><term>Song sparrow</term><term>Sparrow</term><term>Study site</term><term>Swan lake</term><term>Swan lake east</term><term>Swan lake west</term><term>Tortoise island</term><term>Tree glen</term><term>Urban bird</term><term>Urban island</term><term>Urban island site</term><term>Urban landscape</term><term>Urban matrix</term><term>Urban site</term><term>Vancouver island</term><term>Vole meadow</term><term>Zanette</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Natural habitats, and the populations they sustain, are becoming increasingly fragmented by human activities. Parallels between ‘true’ islands and ‘habitat’ islands suggest that standing levels of individual genetic diversity in naturally fragmented populations may predict the genetic fate of their anthropogenically fragmented counterparts, but this hypothesis remains largely untested. We compared neutral-locus genetic diversity of individual song sparrows (Melospiza melodia) breeding in a naturally fragmented landscape (small coastal islands) to that of song sparrows in similar-sized ‘urban islands’ separated by roads and housing developments rather than by water. Individuals on coastal islands were more heterozygous and less inbred than those in urban islands. Estimates of population genetic structuring (assessed by pairwise genetic differentiation and Bayesian clustering methods) and contemporary dispersal (based on assignment tests) revealed little structure within either landscape, suggesting that lack of connectivity at the geographic scale we investigated cannot explain the reduced heterozygosity of urban birds. However, within-site genetic similarity was higher in the urban than the coastal landscape. Assuming that historic genetic diversity was similar in these two environments, our findings suggest that anthropogenically fragmented populations may lose genetic diversity faster than their naturally fragmented counterparts.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Macdougall Shackleton, Elizabeth A" sort="Macdougall Shackleton, Elizabeth A" uniqKey="Macdougall Shackleton E" first="Elizabeth A." last="Macdougall-Shackleton">Elizabeth A. Macdougall-Shackleton</name></noRegion><name sortKey="Clinchy, Michael" sort="Clinchy, Michael" uniqKey="Clinchy M" first="Michael" last="Clinchy">Michael Clinchy</name><name sortKey="Macdougall Shackleton, Elizabeth A" sort="Macdougall Shackleton, Elizabeth A" uniqKey="Macdougall Shackleton E" first="Elizabeth A." last="Macdougall-Shackleton">Elizabeth A. Macdougall-Shackleton</name><name sortKey="Neff, Bryan D" sort="Neff, Bryan D" uniqKey="Neff B" first="Bryan D." last="Neff">Bryan D. Neff</name><name sortKey="Zanette, Liana" sort="Zanette, Liana" uniqKey="Zanette L" first="Liana" last="Zanette">Liana Zanette</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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