Seasonal and spatial variation in the distribution of mangrove macroalgae in the Clyde River, Australia

Academic Press Ltd Elsevier Science Ltd
Publication Type:
Journal Article
Estuarine Coastal And Shelf Science, 2007, 71 (3-4), pp. 683 - 690
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The objective of this study was to determine whether there was significant spatial and temporal variation in macroalgae epiphytic on pneumatophores of the Grey Mangrove, Avicennia marina (Forsk.) Vieth., in the Clyde River, located 280 km south of Sydney, Australia. Three estuarine sites in th Clyde River were surveyed seasonally on four occasions over a two-year period and algal distribution and abundance assessed in respect to temporal, inte-site, intertidal (from front to back of mangrove stand) and vertical (from bottom to top of pneumatophores) variation. Sediment and water characteristics, including nutrient levels, were also assessed in order to examine all variables of potential influence on algal distribution and abundance. The results indicated that intertidal position within sites, and vertical height along the length of the pneumatophore, were the greatest influecne on algal frequency and biomass. Individual species dominated in different intertidal and vertical zones. These observations together with the identification of threee species of macroalgae that fulfil the criteria for bioindicators/bioonitos of environmental impacts are discussed.
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