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<meta content="Johnson, Craig R." name="eprints.creators_name" />
<meta content="Seinen, Ingrid" name="eprints.creators_name" />
<meta content="Craig.Johnson@utas.edu.au" name="eprints.creators_id" />
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<meta content="article" name="eprints.type" />
<meta content="2007-06-21" name="eprints.datestamp" />
<meta content="2008-02-04T05:54:32Z" name="eprints.lastmod" />
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<meta content="Selection for restraint in competitive ability in spatial competition systems
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<meta content="270702" name="eprints.subjects" />
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<meta content="Competition; indirect interactions; spatial self-structuring; coexistence;
community-level selection; cellular automata" name="eprints.keywords" />
<meta content="Definitive version available online at http://www.journals.royalsoc.ac.uk/" name="eprints.note" />
<meta content="The absence of 'super competitors' in nature is usually attributed to organisms facing trade-offs in resource
allocation. Here we identify another mechanism, dependent on indirect interactions among species and
non-random spatial organization, in which selection favours restraint in competitive ability. In simple
spatial models of a three-species intransitive network, indirect interactions favour slower growth and selection
limits the difference in growth rate among species. The mechanism involves a trade-off between
selection at the individual level, which selects for increased growth rate, and at the community level,
which acts to limit growth rate to less than the maximum possible. If the difference in growth rates among
species becomes too large, then the community becomes unstable and collapses to a monoculture of the
slowest growing species. The mechanism requires both the intransitive network structure and selforganized
spatial structure in the system. Similar behaviours arise in more complex systems of more than
three species, and where there are reversals in interaction outcomes between species pairs. The work
suggests that spatial self-structuring, indirect interactions and selection acting on community properties
can be important in evolution. It provides a partial explanation of the high level of species coexistence
and apparent restraint in interspecific interactions evident in some assemblages of sessile marine colonial
organisms." name="eprints.abstract" />
<meta content="2002-04" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Proceedings of the Royal Society of London, B" name="eprints.publication" />
<meta content="269" name="eprints.volume" />
<meta content="1492" name="eprints.number" />
<meta content="655-663" name="eprints.pagerange" />
<meta content="10.1098/rspb.2001.1948" name="eprints.id_number" />
<meta content="UNSPECIFIED" name="eprints.thesis_type" />
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<meta content="http://dx.doi.org/10.1098/rspb.2001.1948" name="eprints.official_url" />
<meta content="Boerlijst, M. C. & Hogeweg, P. 1991 Spiral wave structure in
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<meta content="270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)" name="DC.subject" />
<meta content="The absence of 'super competitors' in nature is usually attributed to organisms facing trade-offs in resource
allocation. Here we identify another mechanism, dependent on indirect interactions among species and
non-random spatial organization, in which selection favours restraint in competitive ability. In simple
spatial models of a three-species intransitive network, indirect interactions favour slower growth and selection
limits the difference in growth rate among species. The mechanism involves a trade-off between
selection at the individual level, which selects for increased growth rate, and at the community level,
which acts to limit growth rate to less than the maximum possible. If the difference in growth rates among
species becomes too large, then the community becomes unstable and collapses to a monoculture of the
slowest growing species. The mechanism requires both the intransitive network structure and selforganized
spatial structure in the system. Similar behaviours arise in more complex systems of more than
three species, and where there are reversals in interaction outcomes between species pairs. The work
suggests that spatial self-structuring, indirect interactions and selection acting on community properties
can be important in evolution. It provides a partial explanation of the high level of species coexistence
and apparent restraint in interspecific interactions evident in some assemblages of sessile marine colonial
organisms." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Selection for restraint in competitive ability in spatial competition systems</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Johnson, Craig R.</span> and <span class="person_name">Seinen, Ingrid</span> (2002) <xhtml:em>Selection for restraint in competitive ability in spatial competition systems.</xhtml:em> Proceedings of the Royal Society of London, B, 269 (1492). pp. 655-663.</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/1191/1/2002_Johnson_%26_Seinen_PRSL_2002.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1191/1/2002_Johnson_%26_Seinen_PRSL_2002.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />1025Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="1535" name="docid" accept-charset="utf-8" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1098/rspb.2001.1948">http://dx.doi.org/10.1098/rspb.2001.1948</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">The absence of 'super competitors' in nature is usually attributed to organisms facing trade-offs in resource
allocation. Here we identify another mechanism, dependent on indirect interactions among species and
non-random spatial organization, in which selection favours restraint in competitive ability. In simple
spatial models of a three-species intransitive network, indirect interactions favour slower growth and selection
limits the difference in growth rate among species. The mechanism involves a trade-off between
selection at the individual level, which selects for increased growth rate, and at the community level,
which acts to limit growth rate to less than the maximum possible. If the difference in growth rates among
species becomes too large, then the community becomes unstable and collapses to a monoculture of the
slowest growing species. The mechanism requires both the intransitive network structure and selforganized
spatial structure in the system. Similar behaviours arise in more complex systems of more than
three species, and where there are reversals in interaction outcomes between species pairs. The work
suggests that spatial self-structuring, indirect interactions and selection acting on community properties
can be important in evolution. It provides a partial explanation of the high level of species coexistence
and apparent restraint in interspecific interactions evident in some assemblages of sessile marine colonial
organisms.</p></div><table style="margin-bottom: 1em" border="0" cellpadding="3" class="not_ep_block"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Additional Information:</th><td valign="top" class="ep_row">Definitive version available online at http://www.journals.royalsoc.ac.uk/</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">Competition; indirect interactions; spatial self-structuring; coexistence;
community-level selection; cellular automata</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/270702.html">270000 Biological Sciences > 270700 Ecology and Evolution > 270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">1191</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Professor Craig R. Johnson</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">21 Jun 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">04 Feb 2008 16:54</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=1191;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=1191">item control page</a></p>
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