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The influence of size‐dependent life‐history traits on the structure and dynamics of populations and communities

Identifieur interne : 002740 ( Istex/Corpus ); précédent : 002739; suivant : 002741

The influence of size‐dependent life‐history traits on the structure and dynamics of populations and communities

Auteurs : André M. De Roos ; Lennart Persson ; Edward Mccauley

Source :

RBID : ISTEX:7CCA7FFF5404A8C5475794C589BFCABC7B0D15BD

English descriptors

Abstract

Individual organisms often show pronounced changes in body size throughout life with concomitant changes in ecological performance. We synthesize recent insight into the relationship between size dependence in individual life history and population dynamics. Most studies have focused on size‐dependent life‐history traits and population size‐structure in the highest trophic level, which generally leads to population cycles with a period equal to the juvenile delay. These cycles are driven by differences in competitiveness of differently sized individuals. In multi‐trophic systems, size dependence in life‐history traits at lower trophic levels may have consequences for both the dynamics and structure of communities, as size‐selective predation may lead to the occurrence of emergent Allee effects and the stabilization of predator–prey cycles. These consequences are linked to that individual development is density dependent. We conjecture that especially this population feedback on individual development may lead to new theoretical insight compared to theory based on unstructured or age‐dependent models. Density‐dependent individual development may also cause individuals to realize radically different life histories, dependent on the state and dynamics of the population during their life and may therefore have consequences for individual behaviour or the evolution of life‐history traits as well.

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DOI: 10.1046/j.1461-0248.2003.00458.x

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<namePart type="family">Persson</namePart>
<affiliation>Department of Ecology and Environmental Science, Umeå University, SE‐90187 Umeå, Sweden</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Edward</namePart>
<namePart type="family">McCauley</namePart>
<affiliation>Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada T2N 1N4</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<typeOfResource>text</typeOfResource>
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<originInfo>
<publisher>Blackwell Science Ltd</publisher>
<place>
<placeTerm type="text">Oxford, UK</placeTerm>
</place>
<dateIssued encoding="w3cdtf">2003-05</dateIssued>
<copyrightDate encoding="w3cdtf">2003</copyrightDate>
</originInfo>
<language>
<languageTerm type="code" authority="rfc3066">en</languageTerm>
<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
</language>
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<extent unit="figures">5</extent>
<extent unit="tables">1</extent>
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<abstract lang="en">Individual organisms often show pronounced changes in body size throughout life with concomitant changes in ecological performance. We synthesize recent insight into the relationship between size dependence in individual life history and population dynamics. Most studies have focused on size‐dependent life‐history traits and population size‐structure in the highest trophic level, which generally leads to population cycles with a period equal to the juvenile delay. These cycles are driven by differences in competitiveness of differently sized individuals. In multi‐trophic systems, size dependence in life‐history traits at lower trophic levels may have consequences for both the dynamics and structure of communities, as size‐selective predation may lead to the occurrence of emergent Allee effects and the stabilization of predator–prey cycles. These consequences are linked to that individual development is density dependent. We conjecture that especially this population feedback on individual development may lead to new theoretical insight compared to theory based on unstructured or age‐dependent models. Density‐dependent individual development may also cause individuals to realize radically different life histories, dependent on the state and dynamics of the population during their life and may therefore have consequences for individual behaviour or the evolution of life‐history traits as well.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>Allee effects</topic>
<topic>community structure</topic>
<topic>density‐dependent individual development</topic>
<topic>generation cycles</topic>
<topic>life history</topic>
<topic>population dynamics</topic>
<topic>size‐structure</topic>
<topic>size‐structured models</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Ecology Letters</title>
</titleInfo>
<genre type="journal">journal</genre>
<identifier type="ISSN">1461-023X</identifier>
<identifier type="eISSN">1461-0248</identifier>
<identifier type="DOI">10.1111/(ISSN)1461-0248</identifier>
<identifier type="PublisherID">ELE</identifier>
<part>
<date>2003</date>
<detail type="volume">
<caption>vol.</caption>
<number>6</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>5</number>
</detail>
<extent unit="pages">
<start>473</start>
<end>487</end>
<total>15</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">7CCA7FFF5404A8C5475794C589BFCABC7B0D15BD</identifier>
<identifier type="DOI">10.1046/j.1461-0248.2003.00458.x</identifier>
<identifier type="ArticleID">ELE458</identifier>
<recordInfo>
<recordContentSource>WILEY</recordContentSource>
<recordOrigin>Blackwell Science Ltd</recordOrigin>
</recordInfo>
</mods>
</metadata>
<serie></serie>
</istex>
</record>

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