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Subtidal reef monitoring

Subtidal reef monitoring sites (in red).

Subtidal reef monitoring sites (in red).

2 years ago from Unknown LDAP UserParks Victoria

Location: Subtidal reef monitoring

Subtidal reef biota – bull kelp. Photo by Mark Rodrigue.

Subtidal reef biota – bull kelp. Photo by Mark Rodrigue.

2 years ago from Unknown LDAP UserParks Victoria

Location: Subtidal reef monitoring

Subtidal reef biota – red velvetfish. Photo by AME.

Subtidal reef biota – red velvetfish. Photo by AME.

2 years ago from Unknown LDAP UserParks Victoria

Location: Subtidal reef monitoring

Subtidal reef biota – horseshoe leatherjacket. Photo by Don Love.

Subtidal reef biota – horseshoe leatherjacket. Photo by Don Love.

2 years ago from Unknown LDAP UserParks Victoria

Location: Subtidal reef monitoring

Subtidal reef biota – blacklip abalone.

Subtidal reef biota – blacklip abalone.

2 years ago from Unknown LDAP UserParks Victoria

Location: Subtidal reef monitoring

Subtidal reef biota – rock lobster. Photo by Don Love.

Subtidal reef biota – rock lobster. Photo by Don Love.

2 years ago from Unknown LDAP UserParks Victoria

Location: Subtidal reef monitoring

Subtidal reef surveys. Photo by AME.

Subtidal reef surveys. Photo by AME.

2 years ago from Unknown LDAP UserParks Victoria

Location: Subtidal reef monitoring

Algal surveys. Photo by AME.

Algal surveys. Photo by AME.

2 years ago from Unknown LDAP UserParks Victoria

Location: Subtidal reef monitoring

Subtidal reef monitoring

Subtidal reef monitoring

2 years ago from Unknown LDAP UserParks Victoria

Location: Subtidal reef monitoring

The shallow subtidal reef monitoring program (SRMP) was established in 1998 at Wilsons Promontory before the declaration of the marine national parks system. In 1999 the it was expanded to include the marine environments where Bunurong and Port Phillip Heads Marine National Parks are now located.  With the establishment of marine national parks and sanctuaries in 2002 the program was further expanded to include Merri, Marengo, Eagle Rock, Point Cooke, Jawbone, Ricketts Point and Beware Reef Marine Sanctuaries, and Point Addis, Point Hicks and Cape Howe Marine National Parks.

The SRMP was implemented to provide information on the status of natural assets and threatening processes, and to determine the nature and magnitude of trends through time.  The results of the program will allow assessment of the condition of the park and will influence management priorities and responses.

Methods Summary

The SRMP involves standardised underwater diver-mediated visual survey methods of macroalgae, invertebrates and fish, generally at a depth of less than 10m (Edmunds and Hart 2003). 

The SRMP monitors a specific suite of flora and fauna associated with reefs in shallow waters and is not designed to assess non-reef associated biota in shallow waters nor is it designed to assess the suite of species found in deeper water. Sites will now be monitored according to a revised monitoring schedule. 

Current Results

The data collected since commencement of this program has provided essential baseline information on biodiversity both within and outside of MPAs.  A preliminary analysis of the data collected prior to 2007 was conducted by the University of Melbourne.  This analysis compared sites within MPAs with similar sites (reference sites) outside MPAs both pre- and post-declaration. 

Generally there were few differences in species size and abundance between MPAs and reference sites and only a few species showed increases in the MPAs (see also Marine Natural Values reports for details ).  This result was no surprise as previous national and international studies have highlighted that it can take well over a decade after declaration before changes in species size and abundance in MPAs can be detected. Interestingly other studies have also found that some subtidal reef species actually decrease in size and/or abundance because of complex species interactions.

More recent analysis has detected other useful information.  At Pope’s Eye, which has a longer period of protection as a Fisheries reserve from the late 1970s, an apparent increase in fish size and abundance has been detected.  Furthermore, the program has also identified threats to natural assets such as illegal harvesting of abalone in Bunurong and Cape Howe MNPs, marine pest incursions in MPAs and the dieback of a key habitat-forming seaweed in Port Phillip Heads MNP.  Threat detection is an essential activity so that Parks Victoria can implement management actions to reduce the impact of these threats.

A targeted analysis of monitoring data in relation to conservation outcomes for each marine national park and sanctuary will be carried out by 2013 (see Future Monitoring Directions).

 

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