the reef biota at Wilsons promontory marine national - Parks Victoria

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Parks Victoria Technical Series #74SRMP Wilsons Promontory MNPSea sweep Scorpis aequipinnis, andbutterfly perch Caesioperca lepidopteraScalyfin Parma victoriaeBlue-throated wrasseNotolabrus tetricus (male)Six-spined leatherjacketMeuschenia freycineti (male)Magpie morwongCheilodactylus nigripesOld-wife Enoplosus armatusFigure 1.3. Examples of fish species found on Victorian subtidal reefs.5
Parks Victoria Technical Series #74SRMP Wilsons Promontory MNP1.2. Subtidal Reef Monitoring Program1.2.1. ObjectivesAn important aspect of the management and conservation of Victorian marine naturalresources and assets is assessing the condition of the ecosystem and how this changes overtime. Combined with an understanding of ecosystem processes, this information can be usedto manage any threats or pressures on the environment to ensure ecosystem sustainability.Consequently, the Victorian Government has established a long-term Subtidal ReefMonitoring Program (SRMP). The primary objective of the SRMP is to provide information onthe status of Victorian reef flora and fauna (focussing on macroalgae, macroinvertebratesand fish). This includes monitoring the nature and magnitude of trends in speciesabundances, species diversity and community structure. This is achieved through regularsurveys at locations throughout Victoria, encompassing both representative and uniquehabitats and communities.Information from the SRMP allows managers to better understand and interpret long-termchanges in the population and community dynamics of Victoria’s reef flora and fauna. As alonger time series of data are collected, the SRMP will allow managers to:• compare changes in the status of species populations and biological communitiesbetween highly protected marine national parks and marine sanctuaries and otherVictorian reef areas (e.g. Edgar and Barrett 1997, 1999);• determine associations between species and between species and environmentalparameters (e.g. depth, exposure, reef topography) and assess how theseassociations vary through space and time (e.g. Edgar et al. 1997; Dayton et al. 1998;Edmunds, Roob and Ferns 2000);• provide benchmarks for assessing the effectiveness of management actions, inaccordance with international best practice for quality environmental managementsystems (Holling 1978; Meredith 1997); and• determine the responses of species and communities to unforeseen andunpredictable events such as marine pest invasions, mass mortality events, oil spills,severe storm events and climate change (e.g. Ebeling et al. 1985; Edgar 1998; Roobet al. 2000; Sweatman et al. 2003).A monitoring survey gives an estimate of population abundance and community structure ata small window in time. Patterns seen in data from periodic surveys are unlikely to exactlymatch changes in the real populations over time or definitively predict the size and nature offuture variation. Plots of changes over time are unlikely to match the changes in realpopulations because changes over shorter time periods and actual minima and maxima may6
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the reef biota at Wilsons promontory marine national - Parks Victoria

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