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- <title>UTas ePrints - Interaction and impacts of two introduced species on a soft-sediment marine assemblage in SE Tasmania</title>
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- <meta content="Ross, D. Jeff" name="eprints.creators_name" />
- <meta content="Johnson, Craig R." name="eprints.creators_name" />
- <meta content="Hewitt, Chad L." name="eprints.creators_name" />
- <meta content="Ruiz, G.M." name="eprints.creators_name" />
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- <meta content="Interaction and impacts of two introduced species on a soft-sediment marine assemblage in SE Tasmania
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- <meta content="Asterias amurensis; Carcinus maenas; Fulvia tenuicostata; Katelysia rhytiphora" name="eprints.keywords" />
- <meta content="The original publication is available at www.springerlink.com" name="eprints.note" />
- <meta content="Introduced species are having major impacts in terrestrial, freshwater and marine ecosystems worldwide.
- It is increasingly recognised that effects of multiple
- species often cannot be predicted from the effect of each
- species alone, due to complex interactions, but most
- investigations of invasion impacts have examined only
- one non-native species at a time and have not addressed
- the interactive effects of multiple species. We conducted
- a field experiment to compare the individual and combined
- effects of two introduced marine predators, the
- northern Pacific seastar Asterias amurensis and the
- European green crab Carcinus maenas, on a soft-sediment
- invertebrate assemblage in Tasmania. Spatial
- overlap in the distribution of these invaders is just
- beginning in Tasmania, and appears imminent as their respective ranges expand, suggesting a strong overlap in
- food resources will result from the shared proclivity for
- bivalve prey. A. amurensis and C. maenas provide good
- models to test the interaction between multiple introduced
- predators, because they leave clear predator-specific traces of their predatory activity for a number of
- common prey taxa (bivalves and gastropods). Our
- experiments demonstrate that both predators had a
- major effect on the abundance of bivalves, reducing
- populations of the commercial bivalves Fulvia tenuicostata
- and Katelysia rhytiphora. The interaction between
- C. maenas and A. amurensis appears to be one of resource
- competition, resulting in partitioning of bivalves
- according to size between predators, with A. amurensis
- consuming the large and C. maenas the small bivalves.
- At a large spatial scale, we predict that the combined
- effect on bivalves may be greater than that due to each
- predator alone simply because their combined distribution
- is likely to cover a broader range of habitats. At a
- smaller scale, in the shallow subtidal, where spatial
- overlap is expected to be most extensive, our results
- indicate the individual effects of each predator are likely
- to be modified in the presence of the other as densities
- increase. These results further highlight the need to
- consider the interactive effects of introduced species,
- especially with continued increases in the number of
- established invasions." name="eprints.abstract" />
- <meta content="2004-04" name="eprints.date" />
- <meta content="published" name="eprints.date_type" />
- <meta content="Marine Biology" name="eprints.publication" />
- <meta content="144" name="eprints.volume" />
- <meta content="4" name="eprints.number" />
- <meta content="747-756" name="eprints.pagerange" />
- <meta content="10.1007/s00227-003-1223-4" name="eprints.id_number" />
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- crab, Carcinus maenas, predation upon a venerid clam, Katelysia
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- <meta content="270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)" name="DC.subject" />
- <meta content="Introduced species are having major impacts in terrestrial, freshwater and marine ecosystems worldwide.
- It is increasingly recognised that effects of multiple
- species often cannot be predicted from the effect of each
- species alone, due to complex interactions, but most
- investigations of invasion impacts have examined only
- one non-native species at a time and have not addressed
- the interactive effects of multiple species. We conducted
- a field experiment to compare the individual and combined
- effects of two introduced marine predators, the
- northern Pacific seastar Asterias amurensis and the
- European green crab Carcinus maenas, on a soft-sediment
- invertebrate assemblage in Tasmania. Spatial
- overlap in the distribution of these invaders is just
- beginning in Tasmania, and appears imminent as their respective ranges expand, suggesting a strong overlap in
- food resources will result from the shared proclivity for
- bivalve prey. A. amurensis and C. maenas provide good
- models to test the interaction between multiple introduced
- predators, because they leave clear predator-specific traces of their predatory activity for a number of
- common prey taxa (bivalves and gastropods). Our
- experiments demonstrate that both predators had a
- major effect on the abundance of bivalves, reducing
- populations of the commercial bivalves Fulvia tenuicostata
- and Katelysia rhytiphora. The interaction between
- C. maenas and A. amurensis appears to be one of resource
- competition, resulting in partitioning of bivalves
- according to size between predators, with A. amurensis
- consuming the large and C. maenas the small bivalves.
- At a large spatial scale, we predict that the combined
- effect on bivalves may be greater than that due to each
- predator alone simply because their combined distribution
- is likely to cover a broader range of habitats. At a
- smaller scale, in the shallow subtidal, where spatial
- overlap is expected to be most extensive, our results
- indicate the individual effects of each predator are likely
- to be modified in the presence of the other as densities
- increase. These results further highlight the need to
- consider the interactive effects of introduced species,
- especially with continued increases in the number of
- established invasions." name="DC.description" />
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- <h1 class="ep_tm_pagetitle">Interaction and impacts of two introduced species on a soft-sediment marine assemblage in SE Tasmania</h1>
- <p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Ross, D. Jeff</span> and <span class="person_name">Johnson, Craig R.</span> and <span class="person_name">Hewitt, Chad L.</span> and <span class="person_name">Ruiz, G.M.</span> (2004) <xhtml:em>Interaction and impacts of two introduced species on a soft-sediment marine assemblage in SE Tasmania.</xhtml:em> Marine Biology, 144 (4). pp. 747-756.</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/1099/1/2004_Ross%2C_Johnson%2C_Hewitt_%26_Ruiz_Mar_Biol.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/1099/1/2004_Ross%2C_Johnson%2C_Hewitt_%26_Ruiz_Mar_Biol.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />337Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="1347" 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/10.1007/s00227-003-1223-4">http://dx.doi.org/10.1007/s00227-003-1223-4</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Introduced species are having major impacts in terrestrial, freshwater and marine ecosystems worldwide.
- It is increasingly recognised that effects of multiple
- species often cannot be predicted from the effect of each
- species alone, due to complex interactions, but most
- investigations of invasion impacts have examined only
- one non-native species at a time and have not addressed
- the interactive effects of multiple species. We conducted
- a field experiment to compare the individual and combined
- effects of two introduced marine predators, the
- northern Pacific seastar Asterias amurensis and the
- European green crab Carcinus maenas, on a soft-sediment
- invertebrate assemblage in Tasmania. Spatial
- overlap in the distribution of these invaders is just
- beginning in Tasmania, and appears imminent as their respective ranges expand, suggesting a strong overlap in
- food resources will result from the shared proclivity for
- bivalve prey. A. amurensis and C. maenas provide good
- models to test the interaction between multiple introduced
- predators, because they leave clear predator-specific traces of their predatory activity for a number of
- common prey taxa (bivalves and gastropods). Our
- experiments demonstrate that both predators had a
- major effect on the abundance of bivalves, reducing
- populations of the commercial bivalves Fulvia tenuicostata
- and Katelysia rhytiphora. The interaction between
- C. maenas and A. amurensis appears to be one of resource
- competition, resulting in partitioning of bivalves
- according to size between predators, with A. amurensis
- consuming the large and C. maenas the small bivalves.
- At a large spatial scale, we predict that the combined
- effect on bivalves may be greater than that due to each
- predator alone simply because their combined distribution
- is likely to cover a broader range of habitats. At a
- smaller scale, in the shallow subtidal, where spatial
- overlap is expected to be most extensive, our results
- indicate the individual effects of each predator are likely
- to be modified in the presence of the other as densities
- increase. These results further highlight the need to
- consider the interactive effects of introduced species,
- especially with continued increases in the number of
- established invasions.</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 original publication is available at www.springerlink.com</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">Asterias amurensis; Carcinus maenas; Fulvia tenuicostata; Katelysia rhytiphora</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">1099</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 16:23</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=1099;">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=1099">item control page</a></p>
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