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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="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" />
<meta content="published" name="eprints.date_type" />
<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="http://dx.doi.org/10.1034/j.1600-0706.2003.11462.x" name="eprints.official_url" />
<meta content="Anderson, M. J. 2001. A new method for non-parametric
multivariate analysis of variance. - Austral. Ecol. 26:
32-46.
Billick, I. and Case, T. J. 1994. Higher order interactions in
ecological communities: what are they and how can they be
detected? - Ecology 75: 1529-1543.
Buss, L. W. 1979. Bryozoan overgrowth interactions - the
interdependance of competition for space and food. -
Nature 281: 475-477.
Buss, L. W. 1980. Competitive intransitivity and size frequency
distributions of interaction populations. - Proc. Nat.
Acad. Sci. USA 77: 5255-5259.
Buss, L. W. 1990. Competition within and between encrusting
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Buss, L. W. and Jackson, J. B. C. 1979. Competitive networks:
nontransitive competitive relationships in cryptic coral reef
environments. - Am. Nat. 113: 223-234.
Caswell, H. 1989. Matrix population models. - Sinauer Associated
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Dunstan P. K. and Johnson C. R. (submitted). Predicting
global dynamics from local interactions: spatial models
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communities.
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Patterns of species interaction strength in assembled theoretical
competition communities. - Ecol. Lett. 2: 70-74.
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estimates of competition coefficients in a montane
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Wilkins, Baltimore, MD.
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Nat. 101: 377-385.
May, R. M. 1973. Stability and complexity in model ecosystems.
- Princeton Univ. Press.
McPhee, C. S. and Aarssen, L. W. 2001. The separation
of above- and below-ground competition in plants. A review and critique of methodology. - Plant Ecol. 152:
119-136.
Nandakumar, K. and Tanaka, M. 1997. Effect of colony size
on the competitive outcome of encrusting colonial organisms.
- Ecol. Res. 12: 223-230.
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of the competition coefficients. - Am. Nat. 108: 399-408.
Okamura, B. 1992. Microhabitat variation and patterns of
colony growth and feeding in a marine bryozoan. - Ecology
73: 1502-1513.
Russ, G. R. 1982. Overgrowth in amarine epifaunal community:
competitive hierarchies and competitive networks. - Oecologia
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an experimental approach with protozoa. - Ecology
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Winston, J. E. and Jackson, J. B. C. 1979. Ecology of cryptic
coral reef communities. IV. Community development and
life histories of encrusting cheilostome bryozoa. - J. Exp.
Mar. Biol. Ecol. 76: 1-21.
Wootton, J. T. 1993. Indirect effects and habitat use in an
intertidal community: interaction chains and interaction
modifications. - Am. Nat. 141: 71-89.
Wootton, J. T. 1994. Putting the pieces together: testing the
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&#13;
marine epibenthic assemblage with respect to the outcomes of interspecific interactions,&#13;
neighbour-specific growth rates, and the dynamics of spatial and mean-field&#13;
models of the system. We compared the outcomes of interactions and overgrowth&#13;
rates of pair-wise combinations of species in spatially simplified contrived interactions&#13;
with the same combinations in an unmanipulated assemblage. While estimates of&#13;
neighbour-specific growth rates were similar in both sets of interactions, the probability&#13;
of a species winning a particular interaction was strongly dependent on whether&#13;
the interaction was contrived or occurred in the unmanipulated assemblage. The&#13;
dynamics of a spatial model and its mean-field equivalent parameterised from&#13;
estimates of interaction outcome and neighbour-specific growth from contrived&#13;
interactions were significantly different to the dynamics of models based on estimates&#13;
of interaction outcome and neighbour-specific growth obtained from non-manipulated&#13;
assemblages. Differences in the dynamics of models based on parameters from&#13;
unmanipulated and contrived interactions are primarily due to differences in outcomes&#13;
of interspecific interactions, while fluctuations in growth rates contribute to the&#13;
variability around these dynamics. Our results suggest that conclusions about interspecific&#13;
interactions and community dynamics examined in simplified spatial associations&#13;
(e.g. in manipulative experiments) is likely to be limited to assemblages with a&#13;
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 &gt; 270700 Ecology and Evolution &gt; 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&amp;eprintid=1118">item control page</a></p>
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