bioindicators used to detect prawn farm and sewage effluent
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Marine Botany The University of Queensland. Bioindicators used to detect prawn farm and sewage effluent. Adrian Jones, James Udy, Mark O’Donohue & William Dennison Department of Botany, The University of Queensland, Brisbane, Queensland, Australia. Acknowledgements. - PowerPoint PPT PresentationTRANSCRIPT
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Bioindicators used to detect prawn Bioindicators used to detect prawn farm and sewage effluentfarm and sewage effluent
Adrian Jones, James Udy, Mark O’Donohue & William DennisonAdrian Jones, James Udy, Mark O’Donohue & William Dennison
Department of Botany, The University of Queensland, Brisbane, Queensland, AustraliaDepartment of Botany, The University of Queensland, Brisbane, Queensland, Australia
Marine BotanyMarine BotanyThe University of QueenslandThe University of Queensland
R C f
U AC U LT
E
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AcknowledgementsAcknowledgements
• Brisbane River and Moreton Bay Brisbane River and Moreton Bay Wastewater Management Study (Task - Wastewater Management Study (Task - DIBM)DIBM)
• Ian McLeod & Tom Taranto - CSIRO Ian McLeod & Tom Taranto - CSIRO Marine ResearchMarine Research
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AimsAims
• Develop bioindicators to identify Develop bioindicators to identify different biotic responses for prawn farm different biotic responses for prawn farm effluent versus sewage effluenteffluent versus sewage effluent
• Use bioindicator responses to determine Use bioindicator responses to determine the extent of prawn farm and sewage the extent of prawn farm and sewage impactsimpacts
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Experimental DesignExperimental Design
• Develop bioindicators by comparing two Develop bioindicators by comparing two separate tidal creeks:separate tidal creeks:
- prawn effluent discharge only - prawn effluent discharge only - sewage discharge only- sewage discharge only
• Use the identified responses in the Use the identified responses in the bioindicators to detect sewage and prawn bioindicators to detect sewage and prawn effluent discharging into the same water effluent discharging into the same water bodybody
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Water Quality ComparisonWater Quality Comparison
NNHH44++
((µµMM))NNOO33
--
((µµMM))PPOO44
33--
((µµMM))CChhll aa
((µµgg ll--11))TTSSSS
((mmgg ll--11))
PPrraawwnnEEfffflluueenntt 6600 11 00..99 110000 330000
SSeewwaaggeeEEfffflluueenntt 1166 116600 110055 00..22 1155
EEaasstteerrnnBBaayyWWaatteerr
11..11 00..11 00..22 00..55 1177
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Study Sites - Two CreeksStudy Sites - Two Creeks
PrawnPrawnFarmFarm
STPSTP
Brisbane
MoretonBay
Logan R
ImpactedUnimpacted
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Water Column NutrientsWater Column Nutrients
PrawnPrawnFarmFarm
STPSTP
Brisbane
MoretonBay
Logan R
NHNH44++ (µM) (µM)
NONO33--/NO/NO22
-- (µM) (µM)
POPO443-3- (µM) (µM)
130
1-25-10
10-20
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Chlorophyll Chlorophyll a a (µg l(µg l-1-1))
PrawnPrawnFarmFarm
STPSTP
Brisbane
MoretonBay
Logan R
1-25-10
10-20
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Phytoplankton Productivity (mg C mPhytoplankton Productivity (mg C m-3-3 h h-1-1))
Prawn FarmPrawn Farm
STPSTP
Brisbane
MoretonBay
Logan R
1-2020-50
50-100
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Tissue %N - Seagrass
2.42.4
2.82.8
2.02.0
2.82.82.02.0
2.02.0
1.71.7
PrawnPrawnFarmFarm
STPSTP
Brisbane
MoretonBay
Logan R
1-1.51.5-2.0
2-3
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Amino Acid Profile - Seagrass Amino Acid Profile - Seagrass Glutamine + Asparagine (nmol g-1 wet wt)Glutamine + Asparagine (nmol g-1 wet wt)
6060
2222
1717
2020
1919
1818
1010
PrawnPrawnFarmFarm
STPSTP
Brisbane
MoretonBay
Logan R
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1515N - SeagrassN - Seagrass
7.17.1
6.86.8
5.05.0
7.87.8
8.08.0
5.65.6
4.74.7
PrawnPrawnFarmFarm
STPSTP
Brisbane
MoretonBay
Logan R
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Study AreaStudy Area
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Study SitesStudy Sites
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Sewage EffluentSewage Effluent
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Prawn Farm PlumePrawn Farm Plume
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Prawn Farm PlumePrawn Farm Plume
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Water Quality ComparisonWater Quality Comparison
NNHH44++
((µµMM))NNOO33
--
((µµMM))PPOO44
33--
((µµMM))CChhll aa
((µµgg ll--11))TTSSSS
((mmgg ll--11))
PPrraawwnnEEfffflluueenntt 6600 11 00..99 110000 330000
SSeewwaaggeeEEfffflluueenntt 1166 116600 110055 00..22 1155
EEaasstteerrnnBBaayyWWaatteerr
11..11 00..11 00..22 00..55 1177
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Water Column NutrientsWater Column Nutrients
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Chlorophyll Chlorophyll aa Map Map
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Amino Acid Profile - Mangroves Amino Acid Profile - Mangroves Glutamine + Asparagine (nmol g-1 wet wt)Glutamine + Asparagine (nmol g-1 wet wt)
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Macroalgal Macroalgal 1515N MapN Map
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ConclusionsConclusions• Sewage effluentSewage effluent
– higher in dissolved nutrientshigher in dissolved nutrients
– proportionally more NOproportionally more NO33-- and PO and PO44
3-3-
• Prawn effluent Prawn effluent
– predominantly NHpredominantly NH44++
– higher in chlorophyll higher in chlorophyll aa and total suspended solids and total suspended solids
• Bioindicators were responsive to nutrients from both prawn and sewage Bioindicators were responsive to nutrients from both prawn and sewage effluent.effluent.
• Bioindicator parameters identified a greater geographical influence than Bioindicator parameters identified a greater geographical influence than traditional water qualitytraditional water quality
• Location of discharge may be important in controlling the impactsLocation of discharge may be important in controlling the impacts