Brief description
To examine how phytoplankton biomass and species' successions are influenced by multiple variables in the Swan River estuary, the four primary phytoplankton groups were modelled with a three-dimensional hydrodynamic model (Estuarine and Lake Computer Model; ELCOM) coupled with an ecological model (Computational Aquatic Ecosystem Dynamics Model; CAEDYM) to simulate physical and ecological processes in the Swan River estuary, Western Australia. The model was run using inputs of bathymetry, meteorological, flow and water quality data. The water quality data was collected weekly at nine sites along a 20 km domain of the Swan River estuary, from Blackwall Reach to Success Hill Reserve from October 1994 to July 1998 for this study.Lineage
Maintenance and Update Frequency: notPlanned
Statement: - Water quality -
From October 1994 to July 1998, data were collected weekly by the Water and Rivers Commission of Western Australia, at nine sites along a 30 km stretch of the Swan River estuary, from Blackwall Reach up to Success Hill Reserve just above the confluence with Helena River (see thumbnail) Vertical profiles were taken at 0.5 m intervals for salinity, dissolved oxygen (DO) and temperature with a Hydrolab Datasonde multiprobe logger. Secchi disk depths (Zsd) were also recorded, and euphotic depths (Zeu) were estimated according to
Zeu = -Zsd ln(0.01)/1.44 (Kirk 1994).
Water samples were taken at the surface, 1 m depth, and bottom (0.5 m from the bed) by pumping water to the surface for distribution into pre-washed polyethylene containers. Samples were immediately divided in two, and one subsample of each pair was filtered through 0.45 um cellulose nitrate filter paper before each subsample and the filter paper (protected from light) were placed on ice. Ammonium was assayed on filtered samples by reaction with phenol, hypochlorite and sodium nitroferricyanide before measurement of absorbance at 640 nm (Greenberg et al. 1992, Standard Method 4500-NH3). Nitrate + nitrite
was assayed by reaction with cadmium in acidic solution before addition of N-(1-napthyl) ethylenediamine dihydrochloride and measurement of absorbance at 540 nm (Greenberg et al. 1992, Standard Method 4500-NO3). Filterable reactive phosphorus (FRP) samples were analysed by reaction of filtered samples with ammonium molybdate, potassium antimonyl tartrate and ascorbic acid, and measurement of absorbance at 880 nm (Greenberg et al. 1992, Standard Method 4500-P). Total nitrogen (TN) analysis was carried out on unfiltered samples by digestion with alkaline persulfate and then analysis as for nitrate. Total phosphorus (TP) samples were initially digested with sulfuric acid and potassium persulfate and then analysed as for FRP.
The filter paper from the water samples was ground and chlorophyll was extracted in aqueous acetone solution. The fluorescence of the extract before and after acidification with HCl was then measured, and converted to chlorophyll a(Greenberg et al. 1992, Standard Method 10200-H).
Phytoplankton counts were made from depth-integrated triplicate water samples, taken with a polyethylene hosepipe sampler to within 0.5 m of the bed or to 6 m depth. Samples were preserved with Lugol's solution at a ratio of 1:100. Counts and identification to genus or family level were carried out on 1 mL subsamples, to 300 cells or ten grids on a Sedgwick Rafter Cell at 125-200× magnification.
Daily flow data were taken from Water and Rivers Commission Regional Services gauges and were summed for the five major tributaries, representing >98% of the drainage area (Peters and Donohue, in press); these tributaries were Avon River, Ellen Brook, Helena River, Jane Brook, and Susannah Brook.
***Reference***
Kirk, J. T. O. (1994). 'Light and Photosynthesis in Aquatic Ecosystems.' (Cambridge University Press: Cambridge.)
Greenberg, A. E., Clesceri, L. S., and Eaton, A. D. (Eds.) (1992). ?Standard Methods for the Examination of Water and Wastewater. (American Public Health Association: Washington, DC.)
From October 1994 to July 1998, data were collected weekly by the Water and Rivers Commission of Western Australia, at nine sites along a 30 km stretch of the Swan River estuary, from Blackwall Reach up to Success Hill Reserve just above the confluence with Helena River (see thumbnail) Vertical profiles were taken at 0.5 m intervals for salinity, dissolved oxygen (DO) and temperature with a Hydrolab Datasonde multiprobe logger. Secchi disk depths (Zsd) were also recorded, and euphotic depths (Zeu) were estimated according to
Zeu = -Zsd ln(0.01)/1.44 (Kirk 1994).
Water samples were taken at the surface, 1 m depth, and bottom (0.5 m from the bed) by pumping water to the surface for distribution into pre-washed polyethylene containers. Samples were immediately divided in two, and one subsample of each pair was filtered through 0.45 um cellulose nitrate filter paper before each subsample and the filter paper (protected from light) were placed on ice. Ammonium was assayed on filtered samples by reaction with phenol, hypochlorite and sodium nitroferricyanide before measurement of absorbance at 640 nm (Greenberg et al. 1992, Standard Method 4500-NH3). Nitrate + nitrite
was assayed by reaction with cadmium in acidic solution before addition of N-(1-napthyl) ethylenediamine dihydrochloride and measurement of absorbance at 540 nm (Greenberg et al. 1992, Standard Method 4500-NO3). Filterable reactive phosphorus (FRP) samples were analysed by reaction of filtered samples with ammonium molybdate, potassium antimonyl tartrate and ascorbic acid, and measurement of absorbance at 880 nm (Greenberg et al. 1992, Standard Method 4500-P). Total nitrogen (TN) analysis was carried out on unfiltered samples by digestion with alkaline persulfate and then analysis as for nitrate. Total phosphorus (TP) samples were initially digested with sulfuric acid and potassium persulfate and then analysed as for FRP.
The filter paper from the water samples was ground and chlorophyll was extracted in aqueous acetone solution. The fluorescence of the extract before and after acidification with HCl was then measured, and converted to chlorophyll a(Greenberg et al. 1992, Standard Method 10200-H).
Phytoplankton counts were made from depth-integrated triplicate water samples, taken with a polyethylene hosepipe sampler to within 0.5 m of the bed or to 6 m depth. Samples were preserved with Lugol's solution at a ratio of 1:100. Counts and identification to genus or family level were carried out on 1 mL subsamples, to 300 cells or ten grids on a Sedgwick Rafter Cell at 125-200× magnification.
Daily flow data were taken from Water and Rivers Commission Regional Services gauges and were summed for the five major tributaries, representing >98% of the drainage area (Peters and Donohue, in press); these tributaries were Avon River, Ellen Brook, Helena River, Jane Brook, and Susannah Brook.
***Reference***
Kirk, J. T. O. (1994). 'Light and Photosynthesis in Aquatic Ecosystems.' (Cambridge University Press: Cambridge.)
Greenberg, A. E., Clesceri, L. S., and Eaton, A. D. (Eds.) (1992). ?Standard Methods for the Examination of Water and Wastewater. (American Public Health Association: Washington, DC.)
Notes
CreditWestern Australian Estuarine Research Foundation
Credit
Water and Rivers Commission (now Department of Water)
Water and Rivers Commission (now Department of Water)
Credit
Monash University
Monash University
Purpose
To identify the processes involved in the succession of phytoplankton and the development of blooms in the Swan River estuary. This research will facilitate estuary management techniques that aim to prevent potentially dangerous and ecologically harmful phytoplankton blooms in the Swan River.
To identify the processes involved in the succession of phytoplankton and the development of blooms in the Swan River estuary. This research will facilitate estuary management techniques that aim to prevent potentially dangerous and ecologically harmful phytoplankton blooms in the Swan River.
Created: 06 02 2008
Data time period: 1994-10 to 1998-07
text: westlimit=115.7; southlimit=-32.05; eastlimit=116; northlimit=-31.85
Subjects
AQUATIC ECOSYSTEMS |
BATHYMETRY/SEAFLOOR TOPOGRAPHY |
BIOLOGICAL CLASSIFICATION |
Biomass |
BIOSPHERE |
Chlorophyll |
COASTAL PROCESSES |
Conductivity |
EARTH SCIENCE |
ECOLOGICAL DYNAMICS |
Estuarine Habitat |
Nutrients |
OCEAN CHEMISTRY |
OCEAN TEMPERATURE |
OCEANS |
Oxygen |
Phytoplankton |
PLANKTON |
Population Dynamics |
PROTISTS |
Saltwater Intrusion |
SPECIES/POPULATION INTERACTIONS |
TERRESTRIAL HYDROSPHERE |
Tidal Height |
TIDES |
VEGETATION |
Water Depth |
WATER QUALITY/WATER CHEMISTRY |
Water Temperature |
oceans |
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Other Information
(PhD thesis)
uri :
http://theses.library.uwa.edu.au/adt-WU2006.0089/
(Appendix of PhD thesis, containing datasets)
uri :
http://theses.library.uwa.edu.au/adt-WU2006.0089/public/08appendix.pdf
Identifiers
- global : a45cb700-d43f-11dc-9644-00188b4c0af8
