the reef biota at bunurong marine national park - Parks Victoria

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Parks Victoria Technical Series No. 84 Bunurong Subtidal Reef Monitoring 3.1.2 Species richness and Diversity Macroalgae The total algal abundance remained at complete substratum coverage throughout the survey period (Figure 3.7a). Macrophyte species richness was relatively high (30-40 species per site) and stable at most sites over time (Figure 3.7b). Algal species diversity was consistently greater within the MNP than in the reference areas (Figure 3.7c). In 2011, species diversity inside and outside the MNP was the lowest since the MNP was established in 2002 (Figure 3.7c). Invertebrates Total invertebrate abundance peaked in 2001, both inside and outside the MNP area, before decreasing to below baseline surveys in 2005 and 2006, with little subsequent change to 2011 (Figure 3.8a). Invertebrate species richness had a similar decline between 2002 and 2005 surveys, and remained at a similar level in following surveys (Figure 3.8b). Species diversity in terms of Hill’s N 2 , was generally confined to between 2 and 3 in both regions, with no discernable trends over time (Figure 3.8c). Fishes Total fish abundance fluctuated over time both inside and outside the Bunurong MNP (Figure 3.9). Total abundances inside the MNP largely followed the reference area variations, except for low total abundances in 2006 (Figure 3.9a). Both species richness and species diversity in the MNP and reference areas were at similar levels and showed similar temporal patterns prior to the establishment of the park. This pattern has generally continued except for significantly higher species richness and diversity in reference sites in the 2006 survey (Figure 3.9b and c). 39
Parks Victoria Technical Series No. 84 Bunurong Subtidal Reef Monitoring Algal Abundance Index Cover Index 0 500 1000 1500 MPA ref a. 2000 2002 2004 2006 2008 2010 2012 Year Algal Species Richness No. Species 0 10 20 30 40 MPA ref b. 2000 2002 2004 2006 2008 2010 2012 Year Algal Diversity Hills N 2 0 5 10 15 MPA ref c. 2000 2002 2004 2006 2008 2010 2012 Year Figure 3.7. Algal species diversity indicators (± standard error) inside and outside Bunurong Marine National Park. 40
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the reef biota at bunurong marine national park - Parks Victoria

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