Natural selection drives the fine-scale divergence of a coevolutionary arms race involving a long-mouthed weevil and its obligate host plant
Identifieur interne : 000A98 ( Pmc/Checkpoint ); précédent : 000A97; suivant : 000A99Natural selection drives the fine-scale divergence of a coevolutionary arms race involving a long-mouthed weevil and its obligate host plant
Auteurs : Hirokazu Toju [Japon]Source :
- BMC Evolutionary Biology [ 1471-2148 ] ; 2009.
Abstract
One of the major recent advances in evolutionary biology is the recognition that evolutionary interactions between species are substantially differentiated among geographic populations. To date, several authors have revealed natural selection pressures mediating the geographically-divergent processes of coevolution. How local, then, is the geographic structuring of natural selection in coevolutionary systems?
I examined the spatial scale of a "geographic selection mosaic," focusing on a system involving a seed-predatory insect, the camellia weevil (
These results show that natural selection can drive the geographic differentiation of interspecific interactions at surprisingly small spatial scales. Future studies should reveal the evolutionary/ecological outcomes of the "fine scale geographic mosaics" in biological communities.
Url:
DOI: 10.1186/1471-2148-9-273
PubMed: 19941669
PubMed Central: 2789073
Affiliations:
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Natural selection drives the fine-scale divergence of a coevolutionary arms race involving a long-mouthed weevil and its obligate host plant</title><author><name sortKey="Toju, Hirokazu" sort="Toju, Hirokazu" uniqKey="Toju H" first="Hirokazu" last="Toju">Hirokazu Toju</name><affiliation wicri:level="1"><nlm:aff id="I1">Research Institute of Genome-based Biofactory, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan</nlm:aff><country xml:lang="fr">Japon</country><wicri:regionArea>Research Institute of Genome-based Biofactory, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566</wicri:regionArea><wicri:noRegion>Ibaraki 305-8566</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">19941669</idno><idno type="pmc">2789073</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2789073</idno><idno type="RBID">PMC:2789073</idno><idno type="doi">10.1186/1471-2148-9-273</idno><date when="2009">2009</date><idno type="wicri:Area/Pmc/Corpus">000570</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000570</idno><idno type="wicri:Area/Pmc/Curation">000570</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000570</idno><idno type="wicri:Area/Pmc/Checkpoint">000A98</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000A98</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Natural selection drives the fine-scale divergence of a coevolutionary arms race involving a long-mouthed weevil and its obligate host plant</title><author><name sortKey="Toju, Hirokazu" sort="Toju, Hirokazu" uniqKey="Toju H" first="Hirokazu" last="Toju">Hirokazu Toju</name><affiliation wicri:level="1"><nlm:aff id="I1">Research Institute of Genome-based Biofactory, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan</nlm:aff><country xml:lang="fr">Japon</country><wicri:regionArea>Research Institute of Genome-based Biofactory, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566</wicri:regionArea><wicri:noRegion>Ibaraki 305-8566</wicri:noRegion></affiliation></author></analytic><series><title level="j">BMC Evolutionary Biology</title><idno type="eISSN">1471-2148</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>One of the major recent advances in evolutionary biology is the recognition that evolutionary interactions between species are substantially differentiated among geographic populations. To date, several authors have revealed natural selection pressures mediating the geographically-divergent processes of coevolution. How local, then, is the geographic structuring of natural selection in coevolutionary systems?</p></sec><sec><title>Results</title><p>I examined the spatial scale of a "geographic selection mosaic," focusing on a system involving a seed-predatory insect, the camellia weevil (<italic>Curculio camelliae</italic>), and its host plant, the Japanese camellia (<italic>Camellia japonica</italic>). In this system, female weevils excavate camellia fruits with their extremely-long mouthparts to lay eggs into seeds, while camellia seeds are protected by thick pericarps. Quantitative evaluation of natural selection demonstrated that thicker camellia pericarps are significantly favored in some, but not all, populations within a small island (Yakushima Island, Japan; diameter ca. 30 km). At the extreme, camellia populations separated by only several kilometers were subject to different selection pressures. Interestingly, in a population with the thickest pericarps, camellia individuals with intermediate pericarp thickness had relatively high fitness when the potential costs of producing thick pericarps were considered. Also importantly, some parameters of the weevil - camellia interaction such as the severity of seed infestation showed clines along temperature, suggesting the effects of climate on the fine-scale geographic differentiation of the coevolutionary processes.</p></sec><sec><title>Conclusion</title><p>These results show that natural selection can drive the geographic differentiation of interspecific interactions at surprisingly small spatial scales. 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<front><journal-meta><journal-id journal-id-type="nlm-ta">BMC Evol Biol</journal-id><journal-title-group><journal-title>BMC Evolutionary Biology</journal-title></journal-title-group><issn pub-type="epub">1471-2148</issn><publisher><publisher-name>BioMed Central</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">19941669</article-id><article-id pub-id-type="pmc">2789073</article-id><article-id pub-id-type="publisher-id">1471-2148-9-273</article-id><article-id pub-id-type="doi">10.1186/1471-2148-9-273</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research article</subject></subj-group></article-categories><title-group><article-title>Natural selection drives the fine-scale divergence of a coevolutionary arms race involving a long-mouthed weevil and its obligate host plant</article-title></title-group><contrib-group><contrib contrib-type="author" corresp="yes" id="A1"><name><surname>Toju</surname><given-names>Hirokazu</given-names></name><xref ref-type="aff" rid="I1">1</xref><email>hiro.toju@gmail.com</email></contrib></contrib-group><aff id="I1"><label>1</label>Research Institute of Genome-based Biofactory, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan</aff><pub-date pub-type="collection"><year>2009</year></pub-date><pub-date pub-type="epub"><day>27</day><month>11</month><year>2009</year></pub-date><volume>9</volume><fpage>273</fpage><lpage>273</lpage><history><date date-type="received"><day>11</day><month>4</month><year>2009</year></date><date date-type="accepted"><day>27</day><month>11</month><year>2009</year></date></history><permissions><copyright-statement>Copyright ©2009 Toju; licensee BioMed Central Ltd.</copyright-statement><copyright-year>2009</copyright-year><copyright-holder>Toju; licensee BioMed Central Ltd.</copyright-holder><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/2.0"><license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution License (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/2.0">http://creativecommons.org/licenses/by/2.0</ext-link>), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><self-uri xlink:href="http://www.biomedcentral.com/1471-2148/9/273"></self-uri><abstract><sec><title>Background</title><p>One of the major recent advances in evolutionary biology is the recognition that evolutionary interactions between species are substantially differentiated among geographic populations. To date, several authors have revealed natural selection pressures mediating the geographically-divergent processes of coevolution. How local, then, is the geographic structuring of natural selection in coevolutionary systems?</p></sec><sec><title>Results</title><p>I examined the spatial scale of a "geographic selection mosaic," focusing on a system involving a seed-predatory insect, the camellia weevil (<italic>Curculio camelliae</italic>), and its host plant, the Japanese camellia (<italic>Camellia japonica</italic>). In this system, female weevils excavate camellia fruits with their extremely-long mouthparts to lay eggs into seeds, while camellia seeds are protected by thick pericarps. Quantitative evaluation of natural selection demonstrated that thicker camellia pericarps are significantly favored in some, but not all, populations within a small island (Yakushima Island, Japan; diameter ca. 30 km). At the extreme, camellia populations separated by only several kilometers were subject to different selection pressures. Interestingly, in a population with the thickest pericarps, camellia individuals with intermediate pericarp thickness had relatively high fitness when the potential costs of producing thick pericarps were considered. Also importantly, some parameters of the weevil - camellia interaction such as the severity of seed infestation showed clines along temperature, suggesting the effects of climate on the fine-scale geographic differentiation of the coevolutionary processes.</p></sec><sec><title>Conclusion</title><p>These results show that natural selection can drive the geographic differentiation of interspecific interactions at surprisingly small spatial scales. Future studies should reveal the evolutionary/ecological outcomes of the "fine scale geographic mosaics" in biological communities.</p></sec></abstract></article-meta></front></pmc><affiliations><list><country><li>Japon</li></country></list><tree><country name="Japon"><noRegion><name sortKey="Toju, Hirokazu" sort="Toju, Hirokazu" uniqKey="Toju H" first="Hirokazu" last="Toju">Hirokazu Toju</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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