IMAS Metadata Catalogue
State of Estuary Report for Georges Bay
Indicators of estuarine ecosystem health – temperature, salinity, turbidity, dissolved oxygen, chlorophyll a, pH, nutrients - were sampled each month for twelve months at four sites in Georges Bay and at the bridge at the river mouth by the Tasmanian Aquaculture and Fisheries Institute (TAFI), community volunteers and Break O’Day Council staff. Another indicator, macroinvertebrate fauna, was sampled by TAFI in winter and summer, and data were obtained on pathogen levels from the Tasmanian Shellfish Quality Assurance Program.
Simple
Identification info
- Date (Creation)
- 2011-11-23T10:33:00
Principal investigator
Tasmanian Aquaculture and Fisheries Institute (TAFI) - Crawford, Christine, Dr
Private Bag 49
Hobart
TAS
7001
Australia
Collaborator
Tasmanian Aquaculture and Fisheries Institute (TAFI) - Cahill, Kylie
Private Bag 49
Hobart
TAS
7001
Australia
- Purpose
- This survery was designed to compare the state of the estuary currently with data collected from 2004-05.
- Credit
- Natural Resource Management (NRM) North
- Status
- Completed
Principal investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Crawford, Christine, Dr
IMAS - Taroona
Private Bag 49
Hobart
TAS
7001
Australia
Point of contact
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Ross, Jeff, Dr
IMAS - Taroona
Private Bag 49
Hobart
TAS
7001
Australia
- Temporal resolution
-
P0Y1M0DT0H0M0S
- Topic category
-
- Oceans
Extent
N
S
E
W
))
Temporal extent
- Time period
- 2007-04-01T00:00:00 2008-03-31T00:00:00
Vertical element
- Minimum value
- 0
- Maximum value
- 10
- Identifier
- EPSG::5715
- Name
- MSL depth
- Maintenance and update frequency
- Not planned
Resource format
- Title
- Microsoft Excel (xls)
- Date
- Edition
- 2003
- Keywords (Theme)
-
- pH
- Benthic macroinvertebrates
- Human impact
- Degradation
- Monitoring progam
- Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
- AODN Discovery Parameter Vocabulary
-
- Practical salinity of the water body
- Temperature of the water body
- pH (total scale) of the water body
- Saturation of oxygen {O2} in the water body [dissolved phase]
- Turbidity of the water body
- Concentration of ammonium {NH4} per unit volume of the water body
- Concentration of silicate {SiO4} per unit volume of the water body
- Keywords (Theme)
-
- Nitrate plus nitrite concentration
Resource constraints
- Classification
- Unclassified
Resource constraints
- Use limitation
- The data described in this record are the intellectual property of the University of Tasmania through the Tasmanian Aquaculture and Fisheries Institute.
Resource constraints
- Linkage
-
http://i.creativecommons.org/l/by/2.5/au/88x31.png
License Graphic
- Title
- Creative Commons Attribution 2.5 Australia License
- Website
-
http://creativecommons.org/licenses/by/2.5/au/
License Text
- Other constraints
- The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).
Associated resource
- Title
- Tasmanian Estuaries Monitoring
- Date (Creation)
- 2011-11-16T00:00:00
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- Crawford, C and Cahill, KM, State of estuary report for Georges Bay. TAFI Project Report (2008)
Content Information
- Content type
- Physical measurement
Identifier
- Identifier
- http://vocab.aodn.org.au/def/unitsofmeasure/entity/481
- Name
- Practical Salinity Unit
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPAA
- Name
- Degrees Celsius
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UUPH
- Name
- pH units
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPCT
- Name
- Percent
- Description
- may be shortened to NTU
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/USTU
- Name
- Nephelometric Turbidity Units
- Name
-
Nitrate plus nitrite concentration
- Name
-
NOX
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UGPL
- Name
- Micrograms per litre
- Name
-
NH4
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UGPL
- Name
- Micrograms per litre
- Name
-
SiO4
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UMGL
- Name
- Milligrams per litre
Distribution Information
- Distribution format
-
-
Microsoft Excel (xls)
-
Microsoft Excel (xls)
Distributor
- OnLine resource
-
DATA ACCESS - George's Bay state of estuary [direct download]
- OnLine resource
-
imas:NR2_CMCrawford_Stateof_estuary_report_georgesbay_GV
MAP - Locations of sampling in Georges Bay
- OnLine resource
-
imas:NR2_CMCrawford_Stateof_estuary_report_georgesbay_GV
This OCG WFS service returns the data for download in subsettable CSV format.
Resource lineage
- Statement
- Five sites in Georges Bay were monitored each month. These sites were selected to be representative of different areas of the bay and where possible to be the same as those that had been monitored previously, thus enabling comparisons of data over time. Indicators monitored monthly for twelve months (April 2007 – March 2008) from the five sites as part of this project were temperature, salinity, dissolved oxygen, pH, turbidity, chlorophyll a, and nutrients (nitrate and nitrite, phosphate, ammonium and silicate). Using the same sampling procedures as previously used in Georges Bay, water column variables were collected during the outgoing tide and preferably as close to slack low tide as possible. The benthic invertebrate fauna were sampled in two seasons, winter and summer. Sampling procedures Temperature, salinity and dissolved oxygen, were measured at the surface and at the bottom using portable field meters with probes which were lowered through the water column. pH and turbidity were measured at the surface only using portable meters. Water samples for nutrients - nitrate plus nitrites, dissolved reactive phosphorous and ammonium, were collected at each site at the surface and filtered according to procedures and equipment supplied by Analytical Services Tasmania (AST), frozen overnight and later analysed by AST. Chlorophyll a concentrations were determined by collecting one litre of surface water at each site and filtering onto 20um filter paper on the day of sampling. The filtrate was frozen and later analysed in the laboratory for chlorophyll a using a spectrophotometer. Georges Bay community members assisted with the collection of these field measurements and water column samples. They received training in the sampling procedures so that they could continue the monitoring after the project finishes. Further details of sampling procedures are provided in “Manual for the Assessment of the Health of Georges Bay: Community monitoring” by Crawford and Cahill (2007), which is appended to the project report. Animal and plant species abundance was investigated by TAFI from sampling the macroinvertebrate fauna in the sediments at four sites in the Bay. The composition of the macroinvertberate infauna and species abundance is considered to be representative of fauna and flora in estuaries and a good indicator of the ecology of the system because soft sediments are the dominant substrate type in estuaries and the infauna are relatively stationary and long lived. Also, the invertebrate fauna in estuarine sediments have been widely sampled in Tasmania and thus there is a substantial knowledge base of these animals. The samples were collected and processed according to standards protocols used by TAFI and described in a number of publications (for details of the sampling method see: Macleod C. and Forbes S. (2006). Guide to the assessment of sediment condition at marine finfish farms in Tasmania, available at http://www.utas.edu.au/tafi/PDF_files/Field%20Manual_FINAL.pdf). Triplicate samples were collected using a van veen grab at the sites in the estuary and a PVC pipe corer in the river at the low tide mark. The sediment samples were sieved through a 1mm sieve in the field and the remaining contents were fixed in 10% formalin. In the laboratory macroinvertebrates were identified to species level where possible and counted.
- Hierarchy level
- Dataset
Metadata
- Metadata identifier
-
f15e32c8-b44d-43eb-adbd-921a6dcddab3
- Language
- English
- Character encoding
- UTF8
Point of contact
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/f15e32c8-b44d-43eb-adbd-921a6dcddab3
Point of truth URL of this metadata record
- Date info (Creation)
- 2021-03-30T21:24:37
- Date info (Revision)
- 2021-03-30T21:24:37
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available