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<title>UTas ePrints - A most unusual barrens: Complex interactions between lobsters, sea urchins and algae facilitates spread of an exotic kelp in eastern Tasmania</title>
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<meta content="Johnson, Craig R." name="eprints.creators_name" />
<meta content="Valentine, Joseph P." name="eprints.creators_name" />
<meta content="Pederson, Hugh G." name="eprints.creators_name" />
<meta content="Craig.Johnson@utas.edu.au" name="eprints.creators_id" />
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<meta content="Heinzeller, T." name="eprints.editors_name" />
<meta content="Nebelsick, J.H." name="eprints.editors_name" />
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<meta content="2007-06-25" name="eprints.datestamp" />
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<meta content="A most unusual barrens: Complex interactions between lobsters, sea
urchins and algae facilitates spread of an exotic kelp in eastern Tasmania
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<meta content="Sea urchin (Heliocidaris erythrogramma) 'barrens' in central eastern Tasmania differ from
typical barrens elsewhere in that they seasonally support dense cover of the introduced kelp Undaria pinnatifida.
Sporophytes of this kelp establish in dense stands only when the native algal canopy is reduced, and experimental
removal of native algae results in greatly increased cover of U. pinnatifida and sediment. Urchin
barrens are integral to widespread establishment of U. pinnatifida because urchin grazing and sediment on
barrens prevents native canopy-forming algae from colonizing, but is insufficient to prevent proliferation of
U. pinnatifida. Estimates of population growth of the urchin and in situ rates of lobster predation on urchins
reveal that fishing of lobsters can account for increases in urchin densities, ostensibly to levels enabling barrens
formation. Lobsters are far more important predators of H. erythrogramma than are fishes. Thus, fishing
of rock lobsters may ultimately account for the proliferation of U. pinnatifida in this area.
" name="eprints.abstract" />
<meta content="2004-12" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Balkema" name="eprints.publisher" />
<meta content="Leiden" name="eprints.place_of_pub" />
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<meta content="978-0-415-36481-2" name="eprints.isbn" />
<meta content="Echinoderms: Munchen. Proceedings of the 11th International Echinoderm Conference" name="eprints.book_title" />
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<meta content="Andrew, N.L. & Viejo, R.M., 1998. Ecological limits to the invasion
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Undaria pinnatifida Phaeophyceae, Laminariales on the
South Coast of England. Bot. Mar. 38, 355-358.
Floc'h, J., Pajot, R., & Mouret, V. 1996. Undaria pinnatifida
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Frusher, S.D. 1997. Stock Assessment Report : Rock Lobster.
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pinnatifida Phaeophyta: Laminariales found in a New Zealand
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effects of invaders. Biol. Invasions 1: 3-19.
Pederson, H. G. 2003. Population dynamics of the sea urchin
Heliocidaris erythrogramma on the east coast of Tasmania.
PhD thesis, University of Tasmania.
Pederson, H.G. & Johnson, C.R. (in revision). Predation on sea
urchins inside kelp beds. Mar. Ecol. Prog. Ser.
Rueness, J. 1989. Sargassum muticum and other introduced
Japanese macroalgae: biological pollution of European
coasts. Mar. Pollut. Bull. 20, 173-176.
Sanderson, J.C. 1990. A preliminary survey of the distribution
of the introduced macroalga, Undaria pinnatifida Harvey
Suringer on the east coast of Tasmania, Australia. Bot. Mar.
33:153-157.
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effects after 25 years of no-take marine reserve protection.
Mar. Ecol. Prog. Ser. 246: 1-16.
Steneck, R.S., Graham, M.H., Bourque, B.J., Corbett, D., Erlandson,
J.M., Estes, J.A. & Tegner, M.J. 2002. Kelp forest
ecosystems: biodiversity, stability, resilience and future.
Environ. Conserv. 29, 436-459.
Tegner, M. J. & Dayton, P.K. 2000. Ecosystem effects of fishing
in kelp forest communities. ICES J. Mar. Sci. 57: 579-
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Umar, M.J., McCook, L.J. & Price, I.R. 1998. Effects of sediment
deposition on the seaweed Sargassum on a fringing
coral reef. Coral Reefs 17, 169-177.
Valentine, J.P. 2003. Establishment and persistence of dense
stands of the introduced kelp Undaria pinnatifida. PhD thesis,
University of Tasmania.
Valentine, J.P. & Johnson, C.R. 2003. Establishment of the introduced
kelp Undaria pinnatifida in Tasmania depends on
disturbance to native algal assemblages. J. Exp. Mar. Biol.
Ecol. 295, 63-90.
Valentine, J.P. & Johnson, C.R. 2004a. Establishment of the introduced
kelp Undaria pinnatifida following dieback of the
native macroalga Phyllospora comosa in Tasmania, Australia.
Mar. Freshwat Res. 55, 223-230.
Valentine, J.P. & Johnson, C.R. in revision. Does intensive
grazing by the sea urchin Heliocidaris erythrogramma enable
dense stands of the introduced kelp Undaria pinnatifida
to persist? Mar. Ecol. Prog. Ser.
Wiens, J.A. 1989. Spatial scaling in ecology. Function. Ecol. 3:
385-397." name="eprints.referencetext" />
<meta content="Johnson, Craig R. and Valentine, Joseph P. and Pederson, Hugh G. (2004) A most unusual barrens: Complex interactions between lobsters, sea urchins and algae facilitates spread of an exotic kelp in eastern Tasmania. In: Echinoderms: Munchen. Proceedings of the 11th International Echinoderm Conference. . Balkema, Leiden, pp. 213-220. ISBN 978-0-415-36481-2" name="eprints.citation" />
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<meta content="A most unusual barrens: Complex interactions between lobsters, sea
urchins and algae facilitates spread of an exotic kelp in eastern Tasmania
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<meta content="Johnson, Craig R." name="DC.creator" />
<meta content="Valentine, Joseph P." name="DC.creator" />
<meta content="Pederson, Hugh G." name="DC.creator" />
<meta content="270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)" name="DC.subject" />
<meta content="Sea urchin (Heliocidaris erythrogramma) 'barrens' in central eastern Tasmania differ from
typical barrens elsewhere in that they seasonally support dense cover of the introduced kelp Undaria pinnatifida.
Sporophytes of this kelp establish in dense stands only when the native algal canopy is reduced, and experimental
removal of native algae results in greatly increased cover of U. pinnatifida and sediment. Urchin
barrens are integral to widespread establishment of U. pinnatifida because urchin grazing and sediment on
barrens prevents native canopy-forming algae from colonizing, but is insufficient to prevent proliferation of
U. pinnatifida. Estimates of population growth of the urchin and in situ rates of lobster predation on urchins
reveal that fishing of lobsters can account for increases in urchin densities, ostensibly to levels enabling barrens
formation. Lobsters are far more important predators of H. erythrogramma than are fishes. Thus, fishing
of rock lobsters may ultimately account for the proliferation of U. pinnatifida in this area.
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<h1 class="ep_tm_pagetitle">A most unusual barrens: Complex interactions between lobsters, sea urchins and algae facilitates spread of an exotic kelp in eastern Tasmania</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Johnson, Craig R.</span> and <span class="person_name">Valentine, Joseph P.</span> and <span class="person_name">Pederson, Hugh G.</span> (2004) <xhtml:em>A most unusual barrens: Complex interactions between lobsters, sea urchins and algae facilitates spread of an exotic kelp in eastern Tasmania.</xhtml:em> In: Echinoderms: Munchen. Proceedings of the 11th International Echinoderm Conference. . Balkema, Leiden, pp. 213-220. ISBN 978-0-415-36481-2</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 onmouseover="EPJS_ShowPreview( event, 'doc_preview_1636' );" onmouseout="EPJS_HidePreview( event, 'doc_preview_1636' );" href="http://eprints.utas.edu.au/1254/1/2004_Johnson%2C_Valentine_%26_Pederson_11th_Int_Echinoderm_Conf.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a><div class="ep_preview" id="doc_preview_1636"><table><tr><td><img alt="" src="http://eprints.utas.edu.au/1254/thumbnails/1/preview.png" border="0" class="ep_preview_image" /><div class="ep_preview_title">Preview</div></td></tr></table></div></td><td valign="top"><a href="http://eprints.utas.edu.au/1254/1/2004_Johnson%2C_Valentine_%26_Pederson_11th_Int_Echinoderm_Conf.pdf"><span class="ep_document_citation">PDF</span></a> - Requires a PDF viewer<br />219Kb</td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://www.informaworld.com/smpp/title~db=all~content=t735003435~tab=toc">http://www.informaworld.com/smpp/title~db=all~content=t735003435~tab=toc</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Sea urchin (Heliocidaris erythrogramma) 'barrens' in central eastern Tasmania differ from
typical barrens elsewhere in that they seasonally support dense cover of the introduced kelp Undaria pinnatifida.
Sporophytes of this kelp establish in dense stands only when the native algal canopy is reduced, and experimental
removal of native algae results in greatly increased cover of U. pinnatifida and sediment. Urchin
barrens are integral to widespread establishment of U. pinnatifida because urchin grazing and sediment on
barrens prevents native canopy-forming algae from colonizing, but is insufficient to prevent proliferation of
U. pinnatifida. Estimates of population growth of the urchin and in situ rates of lobster predation on urchins
reveal that fishing of lobsters can account for increases in urchin densities, ostensibly to levels enabling barrens
formation. Lobsters are far more important predators of H. erythrogramma than are fishes. Thus, fishing
of rock lobsters may ultimately account for the proliferation of U. pinnatifida in this area.
</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">Book Chapter</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">1254</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">25 Jun 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">06 Feb 2008 23:15</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=1254;">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=1254">item control page</a></p>
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