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<title>UTas ePrints - Competition coefficients in a marine epibenthic assemblage depend on spatial structure</title>
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<meta content="Dunstan, Piers K." name="eprints.creators_name" />
<meta content="Johnson, Craig R." name="eprints.creators_name" />
<meta content="Piers.Dunstan@csiro.au" name="eprints.creators_id" />
<meta content="Craig.Johnson@utas.edu.au" name="eprints.creators_id" />
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<meta content="2007-05-31" name="eprints.datestamp" />
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<meta content="Competition coefficients in a marine epibenthic assemblage depend on spatial structure" name="eprints.title" />
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<meta content="270702" name="eprints.subjects" />
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<meta content="community dynamics; growth rate; interspecific competition; interspecific interaction; spatial analysis" name="eprints.keywords" />
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<meta content="We investigated the importance of the spatial context of interactions in a multispecies
marine epibenthic assemblage with respect to the outcomes of interspecific interactions,
neighbour-specific growth rates, and the dynamics of spatial and mean-field
models of the system. We compared the outcomes of interactions and overgrowth
rates of pair-wise combinations of species in spatially simplified contrived interactions
with the same combinations in an unmanipulated assemblage. While estimates of
neighbour-specific growth rates were similar in both sets of interactions, the probability
of a species winning a particular interaction was strongly dependent on whether
the interaction was contrived or occurred in the unmanipulated assemblage. The
dynamics of a spatial model and its mean-field equivalent parameterised from
estimates of interaction outcome and neighbour-specific growth from contrived
interactions were significantly different to the dynamics of models based on estimates
of interaction outcome and neighbour-specific growth obtained from non-manipulated
assemblages. Differences in the dynamics of models based on parameters from
unmanipulated and contrived interactions are primarily due to differences in outcomes
of interspecific interactions, while fluctuations in growth rates contribute to the
variability around these dynamics. Our results suggest that conclusions about interspecific
interactions and community dynamics examined in simplified spatial associations
(e.g. in manipulative experiments) is likely to be limited to assemblages with a
similarly simplified spatial structure, which is an unlikely occurrence in nature." name="eprints.abstract" />
<meta content="2003-01" name="eprints.date" />
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<meta content="Oikos" name="eprints.publication" />
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<meta content="79-88" name="eprints.pagerange" />
<meta content="10.1034/j.1600-0706.2003.11462.x" name="eprints.id_number" />
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<meta content="Anderson, M. J. 2001. A new method for non-parametric
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independence of interactions among organisms. - Ecology 75: 1544-1551." name="eprints.referencetext" />
<meta content="Dunstan, Piers K. and Johnson, Craig R. (2003) Competition coefficients in a marine epibenthic assemblage depend on spatial structure. Oikos, 100 (1). pp. 79-88. ISSN 0030-1299" name="eprints.citation" />
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<meta content="Dunstan, Piers K." name="DC.creator" />
<meta content="Johnson, Craig R." name="DC.creator" />
<meta content="270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)" name="DC.subject" />
<meta content="We investigated the importance of the spatial context of interactions in a multispecies
marine epibenthic assemblage with respect to the outcomes of interspecific interactions,
neighbour-specific growth rates, and the dynamics of spatial and mean-field
models of the system. We compared the outcomes of interactions and overgrowth
rates of pair-wise combinations of species in spatially simplified contrived interactions
with the same combinations in an unmanipulated assemblage. While estimates of
neighbour-specific growth rates were similar in both sets of interactions, the probability
of a species winning a particular interaction was strongly dependent on whether
the interaction was contrived or occurred in the unmanipulated assemblage. The
dynamics of a spatial model and its mean-field equivalent parameterised from
estimates of interaction outcome and neighbour-specific growth from contrived
interactions were significantly different to the dynamics of models based on estimates
of interaction outcome and neighbour-specific growth obtained from non-manipulated
assemblages. Differences in the dynamics of models based on parameters from
unmanipulated and contrived interactions are primarily due to differences in outcomes
of interspecific interactions, while fluctuations in growth rates contribute to the
variability around these dynamics. Our results suggest that conclusions about interspecific
interactions and community dynamics examined in simplified spatial associations
(e.g. in manipulative experiments) is likely to be limited to assemblages with a
similarly simplified spatial structure, which is an unlikely occurrence in nature." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Competition coefficients in a marine epibenthic assemblage depend on spatial structure</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Dunstan, Piers K.</span> and <span class="person_name">Johnson, Craig R.</span> (2003) <xhtml:em>Competition coefficients in a marine epibenthic assemblage depend on spatial structure.</xhtml:em> Oikos, 100 (1). pp. 79-88. ISSN 0030-1299</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/1118/1/2003_Dunstan_%26_Johnson_Oikos.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/1118/1/2003_Dunstan_%26_Johnson_Oikos.PDF"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />164Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="1395" 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/10.1034/j.1600-0706.2003.11462.x">http://dx.doi.org/10.1034/j.1600-0706.2003.11462.x</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">We investigated the importance of the spatial context of interactions in a multispecies
marine epibenthic assemblage with respect to the outcomes of interspecific interactions,
neighbour-specific growth rates, and the dynamics of spatial and mean-field
models of the system. We compared the outcomes of interactions and overgrowth
rates of pair-wise combinations of species in spatially simplified contrived interactions
with the same combinations in an unmanipulated assemblage. While estimates of
neighbour-specific growth rates were similar in both sets of interactions, the probability
of a species winning a particular interaction was strongly dependent on whether
the interaction was contrived or occurred in the unmanipulated assemblage. The
dynamics of a spatial model and its mean-field equivalent parameterised from
estimates of interaction outcome and neighbour-specific growth from contrived
interactions were significantly different to the dynamics of models based on estimates
of interaction outcome and neighbour-specific growth obtained from non-manipulated
assemblages. Differences in the dynamics of models based on parameters from
unmanipulated and contrived interactions are primarily due to differences in outcomes
of interspecific interactions, while fluctuations in growth rates contribute to the
variability around these dynamics. Our results suggest that conclusions about interspecific
interactions and community dynamics examined in simplified spatial associations
(e.g. in manipulative experiments) is likely to be limited to assemblages with a
similarly simplified spatial structure, which is an unlikely occurrence in nature.</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">The definitive version is available at www.blackwell-synergy.com</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">community dynamics; growth rate; interspecific competition; interspecific interaction; spatial analysis</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">1118</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">31 May 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">04 Feb 2008 16:52</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=1118;">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=1118">item control page</a></p>
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