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  5. <title>UTas ePrints - Interaction and impacts of two introduced species on a soft-sediment marine assemblage in SE Tasmania</title>
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  13. <meta content="Ross, D. Jeff" name="eprints.creators_name" />
  14. <meta content="Johnson, Craig R." name="eprints.creators_name" />
  15. <meta content="Hewitt, Chad L." name="eprints.creators_name" />
  16. <meta content="Ruiz, G.M." name="eprints.creators_name" />
  17. <meta content="rossdj@unimelb.edu.au" name="eprints.creators_id" />
  18. <meta content="Craig.Johnson@utas.edu.au" name="eprints.creators_id" />
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  25. <meta content="Interaction and impacts of two introduced species on a soft-sediment marine assemblage in SE Tasmania
  26. " name="eprints.title" />
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  28. <meta content="270702" name="eprints.subjects" />
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  30. <meta content="Asterias amurensis; Carcinus maenas; Fulvia tenuicostata; Katelysia rhytiphora" name="eprints.keywords" />
  31. <meta content="The original publication is available at www.springerlink.com" name="eprints.note" />
  32. <meta content="Introduced species are having major impacts in terrestrial, freshwater and marine ecosystems worldwide.
  33. It is increasingly recognised that effects of multiple
  34. species often cannot be predicted from the effect of each
  35. species alone, due to complex interactions, but most
  36. investigations of invasion impacts have examined only
  37. one non-native species at a time and have not addressed
  38. the interactive effects of multiple species. We conducted
  39. a field experiment to compare the individual and combined
  40. effects of two introduced marine predators, the
  41. northern Pacific seastar Asterias amurensis and the
  42. European green crab Carcinus maenas, on a soft-sediment
  43. invertebrate assemblage in Tasmania. Spatial
  44. overlap in the distribution of these invaders is just
  45. beginning in Tasmania, and appears imminent as their respective ranges expand, suggesting a strong overlap in
  46. food resources will result from the shared proclivity for
  47. bivalve prey. A. amurensis and C. maenas provide good
  48. models to test the interaction between multiple introduced
  49. predators, because they leave clear predator-specific traces of their predatory activity for a number of
  50. common prey taxa (bivalves and gastropods). Our
  51. experiments demonstrate that both predators had a
  52. major effect on the abundance of bivalves, reducing
  53. populations of the commercial bivalves Fulvia tenuicostata
  54. and Katelysia rhytiphora. The interaction between
  55. C. maenas and A. amurensis appears to be one of resource
  56. competition, resulting in partitioning of bivalves
  57. according to size between predators, with A. amurensis
  58. consuming the large and C. maenas the small bivalves.
  59. At a large spatial scale, we predict that the combined
  60. effect on bivalves may be greater than that due to each
  61. predator alone simply because their combined distribution
  62. is likely to cover a broader range of habitats. At a
  63. smaller scale, in the shallow subtidal, where spatial
  64. overlap is expected to be most extensive, our results
  65. indicate the individual effects of each predator are likely
  66. to be modified in the presence of the other as densities
  67. increase. These results further highlight the need to
  68. consider the interactive effects of introduced species,
  69. especially with continued increases in the number of
  70. established invasions." name="eprints.abstract" />
  71. <meta content="2004-04" name="eprints.date" />
  72. <meta content="published" name="eprints.date_type" />
  73. <meta content="Marine Biology" name="eprints.publication" />
  74. <meta content="144" name="eprints.volume" />
  75. <meta content="4" name="eprints.number" />
  76. <meta content="747-756" name="eprints.pagerange" />
  77. <meta content="10.1007/s00227-003-1223-4" name="eprints.id_number" />
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  80. <meta content="http://dx.doi.org/10.1007/s00227-003-1223-4" name="eprints.official_url" />
  81. <meta content="Buchanan JB (1966) The biology of Echinocardium cordatum
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  253. (2002) Effect of an invasive crab upon a marine fishhery: green
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  260. " name="eprints.referencetext" />
  261. <meta content="Ross, D. Jeff and Johnson, Craig R. and Hewitt, Chad L. and Ruiz, G.M. (2004) Interaction and impacts of two introduced species on a soft-sediment marine assemblage in SE Tasmania. Marine Biology, 144 (4). pp. 747-756." name="eprints.citation" />
  262. <meta content="http://eprints.utas.edu.au/1099/1/2004_Ross%2C_Johnson%2C_Hewitt_%26_Ruiz_Mar_Biol.pdf" name="eprints.document_url" />
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  264. <meta content="Interaction and impacts of two introduced species on a soft-sediment marine assemblage in SE Tasmania
  265. " name="DC.title" />
  266. <meta content="Ross, D. Jeff" name="DC.creator" />
  267. <meta content="Johnson, Craig R." name="DC.creator" />
  268. <meta content="Hewitt, Chad L." name="DC.creator" />
  269. <meta content="Ruiz, G.M." name="DC.creator" />
  270. <meta content="270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)" name="DC.subject" />
  271. <meta content="Introduced species are having major impacts in terrestrial, freshwater and marine ecosystems worldwide.
  272. It is increasingly recognised that effects of multiple
  273. species often cannot be predicted from the effect of each
  274. species alone, due to complex interactions, but most
  275. investigations of invasion impacts have examined only
  276. one non-native species at a time and have not addressed
  277. the interactive effects of multiple species. We conducted
  278. a field experiment to compare the individual and combined
  279. effects of two introduced marine predators, the
  280. northern Pacific seastar Asterias amurensis and the
  281. European green crab Carcinus maenas, on a soft-sediment
  282. invertebrate assemblage in Tasmania. Spatial
  283. overlap in the distribution of these invaders is just
  284. beginning in Tasmania, and appears imminent as their respective ranges expand, suggesting a strong overlap in
  285. food resources will result from the shared proclivity for
  286. bivalve prey. A. amurensis and C. maenas provide good
  287. models to test the interaction between multiple introduced
  288. predators, because they leave clear predator-specific traces of their predatory activity for a number of
  289. common prey taxa (bivalves and gastropods). Our
  290. experiments demonstrate that both predators had a
  291. major effect on the abundance of bivalves, reducing
  292. populations of the commercial bivalves Fulvia tenuicostata
  293. and Katelysia rhytiphora. The interaction between
  294. C. maenas and A. amurensis appears to be one of resource
  295. competition, resulting in partitioning of bivalves
  296. according to size between predators, with A. amurensis
  297. consuming the large and C. maenas the small bivalves.
  298. At a large spatial scale, we predict that the combined
  299. effect on bivalves may be greater than that due to each
  300. predator alone simply because their combined distribution
  301. is likely to cover a broader range of habitats. At a
  302. smaller scale, in the shallow subtidal, where spatial
  303. overlap is expected to be most extensive, our results
  304. indicate the individual effects of each predator are likely
  305. to be modified in the presence of the other as densities
  306. increase. These results further highlight the need to
  307. consider the interactive effects of introduced species,
  308. especially with continued increases in the number of
  309. established invasions." name="DC.description" />
  310. <meta content="2004-04" name="DC.date" />
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  421. <h1 class="ep_tm_pagetitle">Interaction and impacts of two introduced species on a soft-sediment marine assemblage in SE Tasmania</h1>
  422. <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.&#13;
  423. It is increasingly recognised that effects of multiple&#13;
  424. species often cannot be predicted from the effect of each&#13;
  425. species alone, due to complex interactions, but most&#13;
  426. investigations of invasion impacts have examined only&#13;
  427. one non-native species at a time and have not addressed&#13;
  428. the interactive effects of multiple species. We conducted&#13;
  429. a field experiment to compare the individual and combined&#13;
  430. effects of two introduced marine predators, the&#13;
  431. northern Pacific seastar Asterias amurensis and the&#13;
  432. European green crab Carcinus maenas, on a soft-sediment&#13;
  433. invertebrate assemblage in Tasmania. Spatial&#13;
  434. overlap in the distribution of these invaders is just&#13;
  435. beginning in Tasmania, and appears imminent as their respective ranges expand, suggesting a strong overlap in&#13;
  436. food resources will result from the shared proclivity for&#13;
  437. bivalve prey. A. amurensis and C. maenas provide good&#13;
  438. models to test the interaction between multiple introduced&#13;
  439. predators, because they leave clear predator-specific traces of their predatory activity for a number of&#13;
  440. common prey taxa (bivalves and gastropods). Our&#13;
  441. experiments demonstrate that both predators had a&#13;
  442. major effect on the abundance of bivalves, reducing&#13;
  443. populations of the commercial bivalves Fulvia tenuicostata&#13;
  444. and Katelysia rhytiphora. The interaction between&#13;
  445. C. maenas and A. amurensis appears to be one of resource&#13;
  446. competition, resulting in partitioning of bivalves&#13;
  447. according to size between predators, with A. amurensis&#13;
  448. consuming the large and C. maenas the small bivalves.&#13;
  449. At a large spatial scale, we predict that the combined&#13;
  450. effect on bivalves may be greater than that due to each&#13;
  451. predator alone simply because their combined distribution&#13;
  452. is likely to cover a broader range of habitats. At a&#13;
  453. smaller scale, in the shallow subtidal, where spatial&#13;
  454. overlap is expected to be most extensive, our results&#13;
  455. indicate the individual effects of each predator are likely&#13;
  456. to be modified in the presence of the other as densities&#13;
  457. increase. These results further highlight the need to&#13;
  458. consider the interactive effects of introduced species,&#13;
  459. especially with continued increases in the number of&#13;
  460. 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 &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">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&amp;eprintid=1099">item control page</a></p>
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