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<meta content="Edgar, Graham J." name="eprints.creators_name" />
<meta content="Barrett, N.S." name="eprints.creators_name" />
<meta content="Bancroft, K." name="eprints.creators_name" />
<meta content="Brook, J." name="eprints.creators_name" />
<meta content="Crane, K." name="eprints.creators_name" />
<meta content="gedgar@utas.edu.au" name="eprints.creators_id" />
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<meta content="Ecosystem monitoring in different management zones within the Jurien Bay Marine Park - results of 2004 surveys." name="eprints.title" />
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<meta content="Marine Protected Areas, benthic surveys, Jurien Bay Marine Park" name="eprints.keywords" />
<meta content="Densities of fishes, macroinvertebrates, corals and plants on subtidal rocky reefs within the Jurien Bay Marine Park (JBMP) were surveyed at 42 sites in October and November 2004. At the time of survey, JBMP had been created but legislation to implement the zoning scheme and hence enforce fishing restrictions was not in place. Survey data obtained in 2004 thus represent baseline conditions.
Monitoring surveys utilised the same underwater visual census techniques as used in monitoring programmes operating concurrently in Tasmania, New South Wales, South Australia and Victoria, forming part of a continental-scale study of the effectiveness of marine protected areas (MPAs). Twenty-five JBMP sites had been censused previously in 1999, 2000 and 2003, providing a detailed time series of baseline data. Following recommendations outlined in the 2003 report (Edgar et al. 2003), the monitoring program was considerably expanded in 2004 to encompass additional sites in the outer reef region and in inshore sanctuary zones, and data on rock lobsters were obtained from eight rather than four 50 m x 1 m transect blocks at each site.
The flora and fauna at different sites generally exhibited a low level of change between years compared to variation between sites. With a few exceptions, the biotic composition of sites was generally interspersed with respect to the three major MPA management zones - sanctuary, scientific reference and general use, with no zone possessing a predominance of one particular biotic assemblage type. The exceptions were a lack of deep reef sites located in sanctuary zones (none are included in the zoning plan), and somewhat anomalous sanctuary zone sites in the north near Fishermans Island and inshore opposite Boullanger Island (south of Island Point) that could not be paired in other zone types. Regardless, data collected encompassed most of the range of variability within zones, allowing unambiguous analysis of change through time. Because a wide range of species have been examined, ecosystem shifts as well as changes in the abundance of targeted fishery species will be detectable following the protection of areas from fishing, other than ecosystem impacts caused by rock lobsters on deeper reefs.
The selection of 14 sites within each management zone provides sufficient replication to detect biologically meaningful change for common species and species richness indicators. Any future change in species richness per site of 2 taxa would be evident as a significant effect, as would a doubling in rock lobster numbers within sanctuary zones relative to other fished zones.
Once fishing restrictions pertaining to different management zones are adequately enforced, surveys should be repeated on an annual basis until differences between zones stabilise. Such a monitoring scheme would not only provide time-series information on trends in the abundance of species of interest in different management zones, but also information on indirect impacts of both rock lobster fishing and general recreational and commercial fishing on ecosystems, and regional effects associated with such factors as climate change.
We recommend:
- Baseline data on algal and sessile faunal assemblages be obtained from sites 31, 33, 34, 40 and 41 as a high priority in 2005
- Surveys of fishes and mobile invertebrates be repeated on an annual basis, and surveys of plant assemblages be conducted on a biennial basis, until biotic changes associated with MPA protection stabilise
- At least one sanctuary zone be extended to the outer reef region to fully protect the full range of biodiversity within JBMP. Additional sites within this new zone should then be monitored
" name="eprints.abstract" />
<meta content="2005-06" name="eprints.date" />
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<meta content="Tasmanian Aquaculture and Fisheries Institute" name="eprints.publisher" />
<meta content="Tasmania, Australia" name="eprints.place_of_pub" />
<meta content="33" name="eprints.pages" />
<meta content="University of Tasmania" name="eprints.institution" />
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<meta content="UNSPECIFIED" name="eprints.thesis_type" />
<meta content="ANZECC, 1999. Strategic plan of action for the national representative system of marine protected areas. A guide for action by Australian Governments. Australian and New Zealand Environment and Conservation Council Task Force on Marine Protected Areas, Environment Australia, Canberra, 80 pp.
Barrett, N.S., Buxton, C., 2002. Examining underwater visual census techniques for the assessment of population structure and biodiversity in temperate coastal marine protected areas. Tasmanian Aquaculture and Fisheries Technical Report Series 11, 1-114.
Clarke, K.R., 1993. Non-parametric multivariate analyses of changes in community structure. Aust. J. Ecol. 18, 117-143.
Davis, G.E., 1981. On the role of underwater parks and sanctuaries in the management of coastal resources in the southeastern United States. Env. Conserv. 8, 67-70.
DeMartini E.E., Roberts D., 1982. An empirical test of biases in the rapid visual technique for species-time censuses of reef fish assemblages. Mar. Biology 70: 129-134.
Dugan, J.E., Davis, G.E., 1993. Introduction to the International Symposium on Marine Harvest Refugia. Can. J. Fish. Aquat. Sci. 50, 1991-1992.
Edgar, G.J., Barrett, N.S., 1999. Effects of the declaration of marine reserves on Tasmanian reef fishes, invertebrates and plants. J. Exp. Mar. Biol. Ecol. 242, 107-144.
Edgar, G., Barrett, N., Bancroft, K. 2003. Baseline surveys for ecosystem monitoring within the Jurien Bay Marine Park, 1999-2003. TAFI Internal Report, University of Tasmania.
Edgar G.J., Barrett N.S., Morton A.J., 2004. Biases associated with the use of underwater visual census techniques to quantify fish density and size-structure. Journal of Experimental Mar. Biology and Ecology 308: 269-290.
Fairweather, P.G., McNeill, S.E., 1993. Ecological and other scientific imperatives for marine and estuarine conservation. In: Ivanovici, A.M., Tarte, D., Olsen, M. (Eds.), Protection of marine and estuarine areas: a challenge for Australians. Occasional Paper No. 4, Australian Committee for IUCN, Sydney, pp. 39-48.
Green, R. H., 1979. Sampling design and statistical methods for environmental biologists. Wiley, Chichester, UK.
Jennings, S., Kaiser, M.J., 1998. The effects of fishing on marine ecosystems. Adv. Mar. Biol. 34, 201-352.
Kulbicki M. & Sarramega S., 1999. Comparison of density estimates derived from strip transect and distance sampling for underwater visual censuses: a case study of Chaetodontidae and Pomacanthidae. Aquatic Living Resources 12: 315-325.
Roberts, C.M., Polunin, N.V.C., 1991. Are marine reserves effective in management of reef fisheries? Rev. Fish Biol. Fish. 1, 65-91.
Roberts, C.M., Polunin, N.V.C., 1993. Marine reserves: Simple solutions to managing complex fisheries? Ambio 22, 363-368.
Roberts, C.M., Hawkins, J.P., 2000. Fully-protected marine reserves: a guide. WWF, Washington.
Sobel, J., 1993. Conserving marine diversity through marine protected areas. Oceanus 36, 19-26.
Thompson A.A., Mapstone B.D., 1997. Observer effects and training in underwater visual surveys of reef fishes. Mar. Ecology Progress Series 154: 53-63.
Underwood A.J., 2000. Importance of experimental design in detecting and measuring stresses in Mar. populations. Journal of Aquatic Ecosystem Stress and Recovery 7: 3-24.
Walters C.J. & Holling C.S., 1990. Large-scale management experiments and learning by doing. Ecology 71: 2060-2068.
Zann, L.P., 1995. Our sea, our future. Major findings of the state of the marine environment report for Australia. Great Barrier Reef Marine Park Authority, Townsville, Queensland.
" name="eprints.referencetext" />
<meta content="Edgar, Graham J. and Barrett, N.S. and Bancroft, K. and Brook, J. and Crane, K. (2005) Ecosystem monitoring in different management zones within the Jurien Bay Marine Park - results of 2004 surveys. Project Report. Tasmanian Aquaculture and Fisheries Institute, Tasmania, Australia. (Unpublished)" name="eprints.citation" />
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<meta content="Edgar, Graham J." name="DC.creator" />
<meta content="Barrett, N.S." name="DC.creator" />
<meta content="Bancroft, K." name="DC.creator" />
<meta content="Brook, J." name="DC.creator" />
<meta content="Crane, K." name="DC.creator" />
<meta content="270708 Conservation and Biodiversity" name="DC.subject" />
<meta content="270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)" name="DC.subject" />
<meta content="Densities of fishes, macroinvertebrates, corals and plants on subtidal rocky reefs within the Jurien Bay Marine Park (JBMP) were surveyed at 42 sites in October and November 2004. At the time of survey, JBMP had been created but legislation to implement the zoning scheme and hence enforce fishing restrictions was not in place. Survey data obtained in 2004 thus represent baseline conditions.
Monitoring surveys utilised the same underwater visual census techniques as used in monitoring programmes operating concurrently in Tasmania, New South Wales, South Australia and Victoria, forming part of a continental-scale study of the effectiveness of marine protected areas (MPAs). Twenty-five JBMP sites had been censused previously in 1999, 2000 and 2003, providing a detailed time series of baseline data. Following recommendations outlined in the 2003 report (Edgar et al. 2003), the monitoring program was considerably expanded in 2004 to encompass additional sites in the outer reef region and in inshore sanctuary zones, and data on rock lobsters were obtained from eight rather than four 50 m x 1 m transect blocks at each site.
The flora and fauna at different sites generally exhibited a low level of change between years compared to variation between sites. With a few exceptions, the biotic composition of sites was generally interspersed with respect to the three major MPA management zones - sanctuary, scientific reference and general use, with no zone possessing a predominance of one particular biotic assemblage type. The exceptions were a lack of deep reef sites located in sanctuary zones (none are included in the zoning plan), and somewhat anomalous sanctuary zone sites in the north near Fishermans Island and inshore opposite Boullanger Island (south of Island Point) that could not be paired in other zone types. Regardless, data collected encompassed most of the range of variability within zones, allowing unambiguous analysis of change through time. Because a wide range of species have been examined, ecosystem shifts as well as changes in the abundance of targeted fishery species will be detectable following the protection of areas from fishing, other than ecosystem impacts caused by rock lobsters on deeper reefs.
The selection of 14 sites within each management zone provides sufficient replication to detect biologically meaningful change for common species and species richness indicators. Any future change in species richness per site of 2 taxa would be evident as a significant effect, as would a doubling in rock lobster numbers within sanctuary zones relative to other fished zones.
Once fishing restrictions pertaining to different management zones are adequately enforced, surveys should be repeated on an annual basis until differences between zones stabilise. Such a monitoring scheme would not only provide time-series information on trends in the abundance of species of interest in different management zones, but also information on indirect impacts of both rock lobster fishing and general recreational and commercial fishing on ecosystems, and regional effects associated with such factors as climate change.
We recommend:
- Baseline data on algal and sessile faunal assemblages be obtained from sites 31, 33, 34, 40 and 41 as a high priority in 2005
- Surveys of fishes and mobile invertebrates be repeated on an annual basis, and surveys of plant assemblages be conducted on a biennial basis, until biotic changes associated with MPA protection stabilise
- At least one sanctuary zone be extended to the outer reef region to fully protect the full range of biodiversity within JBMP. Additional sites within this new zone should then be monitored
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<h1 class="ep_tm_pagetitle">Ecosystem monitoring in different management zones within the Jurien Bay Marine Park - results of 2004 surveys.</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Edgar, Graham J.</span> and <span class="person_name">Barrett, N.S.</span> and <span class="person_name">Bancroft, K.</span> and <span class="person_name">Brook, J.</span> and <span class="person_name">Crane, K.</span> (2005) <xhtml:em>Ecosystem monitoring in different management zones within the Jurien Bay Marine Park - results of 2004 surveys.</xhtml:em> Project Report. Tasmanian Aquaculture and Fisheries Institute, Tasmania, Australia. (Unpublished)</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/1640/1/Jurien_Bay_2004.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1640/1/Jurien_Bay_2004.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />241Kb</td></tr></table><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Densities of fishes, macroinvertebrates, corals and plants on subtidal rocky reefs within the Jurien Bay Marine Park (JBMP) were surveyed at 42 sites in October and November 2004. At the time of survey, JBMP had been created but legislation to implement the zoning scheme and hence enforce fishing restrictions was not in place. Survey data obtained in 2004 thus represent baseline conditions.
Monitoring surveys utilised the same underwater visual census techniques as used in monitoring programmes operating concurrently in Tasmania, New South Wales, South Australia and Victoria, forming part of a continental-scale study of the effectiveness of marine protected areas (MPAs). Twenty-five JBMP sites had been censused previously in 1999, 2000 and 2003, providing a detailed time series of baseline data. Following recommendations outlined in the 2003 report (Edgar et al. 2003), the monitoring program was considerably expanded in 2004 to encompass additional sites in the outer reef region and in inshore sanctuary zones, and data on rock lobsters were obtained from eight rather than four 50 m x 1 m transect blocks at each site.
The flora and fauna at different sites generally exhibited a low level of change between years compared to variation between sites. With a few exceptions, the biotic composition of sites was generally interspersed with respect to the three major MPA management zones - sanctuary, scientific reference and general use, with no zone possessing a predominance of one particular biotic assemblage type. The exceptions were a lack of deep reef sites located in sanctuary zones (none are included in the zoning plan), and somewhat anomalous sanctuary zone sites in the north near Fishermans Island and inshore opposite Boullanger Island (south of Island Point) that could not be paired in other zone types. Regardless, data collected encompassed most of the range of variability within zones, allowing unambiguous analysis of change through time. Because a wide range of species have been examined, ecosystem shifts as well as changes in the abundance of targeted fishery species will be detectable following the protection of areas from fishing, other than ecosystem impacts caused by rock lobsters on deeper reefs.
The selection of 14 sites within each management zone provides sufficient replication to detect biologically meaningful change for common species and species richness indicators. Any future change in species richness per site of 2 taxa would be evident as a significant effect, as would a doubling in rock lobster numbers within sanctuary zones relative to other fished zones.
Once fishing restrictions pertaining to different management zones are adequately enforced, surveys should be repeated on an annual basis until differences between zones stabilise. Such a monitoring scheme would not only provide time-series information on trends in the abundance of species of interest in different management zones, but also information on indirect impacts of both rock lobster fishing and general recreational and commercial fishing on ecosystems, and regional effects associated with such factors as climate change.
We recommend:
- Baseline data on algal and sessile faunal assemblages be obtained from sites 31, 33, 34, 40 and 41 as a high priority in 2005
- Surveys of fishes and mobile invertebrates be repeated on an annual basis, and surveys of plant assemblages be conducted on a biennial basis, until biotic changes associated with MPA protection stabilise
- At least one sanctuary zone be extended to the outer reef region to fully protect the full range of biodiversity within JBMP. Additional sites within this new zone should then be monitored
</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Report (Project Report)</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">Marine Protected Areas, benthic surveys, Jurien Bay Marine Park</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/270708.html">270000 Biological Sciences > 270700 Ecology and Evolution > 270708 Conservation and Biodiversity</a><br /><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">ID Code:</th><td valign="top" class="ep_row">1640</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">Miss Arianna Polacheck</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">22 Aug 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</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=1640;">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=1640">item control page</a></p>
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