scholarly journals Humans as predators on rocky reefs in New South Wales, Australia

1991 ◽  
Vol 72 ◽  
pp. 1-14 ◽  
Author(s):  
MJ Kingsford ◽  
AJ Underwood ◽  
SJ Kennelly
Keyword(s):  
New South ◽  
New South Wales ◽  
Rocky Reefs ◽  
South Wales

Range and habitat associations of the native macroalga Caulerpa filiformis in New South Wales, Australia

2015 ◽  
Vol 66 (11) ◽  
pp. 1018 ◽  
Author(s):  
Tim M. Glasby ◽  
Peter. T. Gibson ◽  
Gregory West ◽  
Peter Davies ◽  
Sofietje Voerman
Keyword(s):  
New South ◽  
New South Wales ◽  
Habitat Associations ◽  
Disjunct Distribution ◽  
Species Introduction ◽  
Isolated Populations ◽  
Rocky Reefs ◽  
South Wales ◽  
Green Seaweed ◽  
Natural Range

Caulerpa filiformis is a green seaweed found in New South Wales (NSW, Australia), South Africa, Mozambique and Peru. It has been suggested that the abundance of the species has increased in NSW over recent decades. Extensive aerial and diver surveys identified a 500-km northerly extension to the range of C. filiformis in NSW (to 28°21′S) compared with previous records. The alga has a disjunct distribution with small isolated populations around rocky headlands in far northern NSW, but then no apparent populations for 350km southwards. The far northern populations could be the result of recent human-mediated transport (a species introduction), or were simply not detected previously. The increased distribution around the previous northerly limit is likely a natural range expansion. The distribution of C. filiformis in NSW and globally seems confined to a temperature range of ~16–23°C. We found no relationship between abundance of C. filiformis and human population or oceanic chlorophyll-a (a surrogate for nutrient availability). We demonstrate that C. filiformis is predominately subtidal, being found along sections of coastline where there is a mixture of rocky reefs and beaches. It is argued that sand movement may have facilitated increases in abundance of C. filiformis.

Spatial patterns of ascidian assemblages on subtidal rocky reefs in the Port Stephens - Great Lakes Marine Park, New South Wales

2007 ◽  
Vol 58 (9) ◽  
pp. 843 ◽  
Author(s):  
Kathryn L. Newton ◽  
Bob Creese ◽  
David Raftos
Keyword(s):  
Great Lakes ◽  
Spatial Patterns ◽  
New South ◽  
New South Wales ◽  
Marine Biodiversity ◽  
Rocky Reefs ◽  
Marine Park ◽  
South Wales ◽  
Subtidal Rocky Reefs ◽  
Port Stephens

Spatial and temporal patterns of variability in ascidian assemblages were investigated on horizontal subtidal rocky reefs at Port Stephens, New South Wales (NSW). The study was designed to provide a baseline dataset on ascidian diversity and distribution patterns for an area destined to become a marine park (the Port Stephens–Great Lakes Marine Park: PSGLMP). Differences in ascidian assemblages between exposed oceanic island reefs and sheltered reefs within Port Stephens, and between two depth zones within each subtidal reef, were quantified using non-parametric multivariate techniques coupled with analysis of variance (ANOVA). Ascidian assemblages were highly variable between reef sites, reef exposures and particularly between depth zones within each reef surveyed. However, temporal variation was only observed for a few ascidian species. These highly variable spatial patterns in diversity indicate that numerous subtidal reefs may need to be protected within PSGLMP if the aim of the marine park is to adequately represent the entire array of marine biodiversity in the area.

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