The influence of estuarine water quality on cover of barnacles and Enteromorpha spp.
- 160 Downloads
The influence of ambient water quality on the settlement of barnacles and the green alga Enteromorpha spp. to an artificial substratum in the estuaries of Sydney, Australia, was investigated to test the efficacy of both groups of organisms as indicators of changes in water quality due to urban stormwater runoff and/or sewage overflows. Wooden settlement panels were immersed for 4 months on 17 occasions between 1996 and 2005 at 11 locations known to vary in water-quality parameters (conductivity, total uncombined ammonia, oxidised nitrogen, total nitrogen, filterable phosphorus, total phosphorus, faecal coliforms and chlorophyll-a) and ambient meteorological conditions (total rainfall, maximum rainfall). Water-quality data were collected during the time that the settlement panels were deployed. Cover of barnacles was highly variable among locations (range 1.2–55.2%). Hierarchical partitioning found that chlorophyll-a, total phosphorus and total nitrogen had significant independent positive effects on barnacle cover. Together, these variables explained 26% of the variation in barnacle cover. Mean cover of Enteromorpha spp., however, did not vary significantly among locations suggesting that other potentially more important factors are influencing its settlement and growth. The results of this study suggest that barnacle cover is likely to be a useful indicator of some components of water quality.
KeywordsEstuary Indicator Settlement Urbanised catchments Water quality
Unable to display preview. Download preview PDF.
- APHA [American Public Health Association, American Water Works Association and Water Pollution Control Federation] (1998). Standard methods for the examination of water and wastewater, 20th Edition. Washington DC: American Public Health Association.Google Scholar
- AWT - Ensight (1996). Biological Indicators Pilot Studies—May 1994 to December 1995. Prepared for Clean Waterways Programme, Sydney Water Corporation.Google Scholar
- Day, J. W., Hall, C. A. S., & Kemp, W. M. (1989). Estuarine ecology. New Jersey: Wiley.Google Scholar
- Dean, T. A., & Hurd, L. E. (1980). Development in an estuarine fouling community: The influence of early colonists on later animals. Oecologia, 46, 295–301.Google Scholar
- Ellien, C., Thiébaut, E., Dumas, F., Salomon, J., & Nival, P. (2004). A modelling study of the respective role of hydrodynamic processes and larval mortality on larval dispersal and recruitment of benthic invertebrates: Example of Pectinaria koreni (Annelida: Polychaeta) in the Bay of Seine (English Channel). Journal of Plankton Research, 26, 117–132.CrossRefGoogle Scholar
- Fong, P., Boyer, K. E., & Zedler, J. B. (1998). Developing an indicator of nutrient enrichment in coastal estuaries and lagoons using tissue nitrogen content of the opportunistic alga, Enteromorpha intestinalis (L. Link). Journal of Experimental Marine Biology and Ecology, 231, 63–79.CrossRefGoogle Scholar
- Gombach, M., Bressan, G., & Seriani, M. (1992). Microfouling Seasonality in a locality of the Gulf of Trieste (1986–1988). In R. A. Vollenweider, R. Marchetti, & R. Viviani (Eds.), Marine Coastal Eutrophication (pp. 441–443). Oxford: Elsevier.Google Scholar
- Hargrave, B. T. (1991). Impacts of man’s activities on aquatic systems. In R. S. K. Barnes, & K. H. Mann (Eds.), Fundamentals of aquatic ecology (pp. 245–264). Oxford: Blackwell.Google Scholar
- Kennish, M. J. (1992). Ecology of estuaries: Anthropogenic effects. Boca Raton: CRC.Google Scholar
- Loeb, S. L. (1994). An ecological context for biological monitoring. In S. L. Loeb, & A. Spacie (Eds.), Biological monitoring of aquatic systems (pp. 3–7). Boca Raton: Lewis.Google Scholar
- Lopez, C., & Dates, G. (1998). The efforts of community volunteers in assessing watershed ecosystem health. In D. Rapport, R. Costanza, P. R. Epstein, C. Gaudet, & R. Levins (Eds.), Ecosystem health (pp. 103–128). Oxford: Blackwell.Google Scholar
- Mann, K. H. (2000). Ecology of coastal waters. Oxford: Blackwell.Google Scholar
- Moreira, J. (2006). Patterns of occurrence of grazing molluscs on sandstone and concrete seawalls in Sydney Harbour (Australia). Molluscan Research, 26, 51–60.Google Scholar
- Pierson, W. L., Bishop, K., Van Senden, D., Horton, P. R., & Adamantidis, C. A. (2002). Environmental Flows Initiative Technical Report: Environmental Water Requirements to Maintain Estuarine Processes. Canberra: Environment Australia.Google Scholar
- Quinn, G. P., & Keough, M. J. (2002). Experimental design and data analysis for biologists. Cambridge: Cambridge University Press.Google Scholar
- Scammell, M., & Besley, C. (1995). Biological indicators pilot study: Intertidal settlement - June 1995, Prepared for Clean Waterways Programme, Sydney Water Corporation, Report No. 95/79.Google Scholar
- Underwood, A. J. (1997). Experiments in ecology: Their logical design and interpretation using analysis of variance. Cambridge: Cambridge University Press.Google Scholar
- UNESCO (1980). UNESCO Technical Papers in Marine Science 1978. Journal of Oceanographic Engineering, Vol.OE-5, No.1, January 1980.Google Scholar
- Walsh, C., & MacNally R. (2004). The hier.part package’ available at http://cran.r-project.org/web/packages/hier.part/hier.part.pdf. Accessed 6 August 2008.