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Coastal and estuarine resource condition assessment, a baseline survey in the southern NRM region, Tasmania: Port Cygnet

A 12-month program was developed and implemented in order to obtain baseline information on water quality (salinity, water temperature, dissolved oxygen, turbidity, pH, dissolved nutrients, silica), ecological condition as shown by Chlorophyll a, benthic macroinvertebrates, pathogens, and habitat extent determined from habitat mapping. Five key estuaries and coastal waters were assessed in the Southern NRM Region of Tasmania. The data represented by this record was collected in Port Cygnet.

Simple

Identification info

Date (Creation)
2011-11-21T10:33:00

Principal investigator

Tasmanian Aquaculture and Fisheries Institute (TAFI) - Crawford, Christine, Dr
Private Bag 49
Hobart
TAS
7001
Australia
61 3 6227 7277
ORCID ID >

Collaborator

Tasmanian Aquaculture and Fisheries Institute (TAFI) - Temby, Nepelle
Private Bag 49
Hobart
TAS
7001
Australia
Purpose
This projects' data was obtained as part of the trial implementation of the Coastal and Estuarine Resource Condition Assessment (CERCA) project.
Credit
Natural Resource Management (NRM) South
Credit
Natural Heritage Trust
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
61 3 6227 7277
ORCID ID >

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
61 3 6227 7281
61 3 6227 8035 (facsimile)
ORCID ID >

Temporal resolution
P0Y1M0DT0H0M0S
Topic category
  • Oceans

Extent

N
S
E
W


Geographic identifier
3414:237:1

Title
c-squares
Date (Creation)
2001-12-13T00:00:00

Owner

CSIRO Marine and Atmospheric Research
>

Temporal extent

Time period
2007-04-01T00:00:00 2008-04-30T00:00:00

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)
  • Human impact
  • Degradation
  • Monitoring program
  • Benthic macroinvertebrates
Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
  • ESTUARINE HABITAT
  • INTERTIDAL ZONE
  • BENTHIC HABITAT
  • ANIMALS/INVERTEBRATES
  • WATER TEMPERATURE
  • SALINITY
  • CHLOROPHYLL
  • TURBIDITY
  • NUTRIENTS
Keywords (Discipline)
  • Temperate Reef
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
  • Natural Resource Management
  • Marine and Estuarine Ecology (incl. Marine Ichthyology)
  • Aquatic Ecosystem Studies and Stock Assessment
Keywords (Theme)
  • Salinity
  • Temperature
  • Dissolved oxygen
  • Turbidity
  • Ammonia
  • Nitrate plus Nitrite
  • Reactive phosphorus
  • Silica
  • Chlorophyll a
  • Abundance - benthic macroinvertebrates
  • pH

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
Character encoding
UTF8
Supplemental Information
Temby, N. & Crawford, C. (2008) Coastal and estuarine resource condition assessment, a baseline survey in the southern NRM region, Tasmania. NHT Final Report

Content Information

Content type
Physical measurement
Name
Salinity

Name
ppt
Name
Temperature

Name
Degrees celcius
Name
Dissolved oxygen

Name
DO

Name
percentage saturation
Name
pH

Name
Turbidity

Name
NTU
Name
Ammonia

Name
NH4

Name
mg/L
Name
Nitrate plus Nitrite

Name
NOx

Name
mg/L
Name
Reactive phosphorus

Name
P

Name
mg/L
Name
Silica

Name
mg/L
Name
Chlorophyll a

Name
ug/L
Name
Abundance - benthic macroinvertebrates

Distribution Information

Distribution format
  • Microsoft Excel (xls)

Distributor

Principal investigator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Crawford, Christine, Dr
OnLine resource
DATA ACCESS - Port Cygnet dataset [direct download]

OnLine resource
REPORT - Final project report [direct download]

Resource lineage

Statement
A minimum of 5 sites at key locations in each estuary or coastal waters were selected for monitoring over a 12 month period. Due to the availability of longer-term data, Little Swanport was an exception to this, with only 1 site selected for water quality monitoring over the 12 month period. It was important that each site was revisited using coordinates stored on a GPS and that monitoring methodology remained consistent over time so that any changes could be clearly identified. GPS co-ordinates (decimal latitude/longitude) for the 24 sites sampled in this study are provided in the report. The indicators examined for this study were: · Salinity (ppt) · Water temperature (oC) · Dissolved Oxygen (DO) (% Saturation) · Turbidity (NTU) · pH · Dissolved nutrients – ammonia (NH4 mg/L), nitrate and nitrite (NOx mg/L), and reactive phosphorus (P mg/L), silica, molybdate reactive (mg/L) · Chlorophyll a · Animal/plant species abundance - Benthic macroinvertebrates The methodology for monitoring each indicator has been described in a report (Crawford 2006, available at http://eprints.utas.edu.au/view/authors/Crawford,_C.html) that provides information from a user’s perspective on monitoring each indicator in Tasmania. The indicators outlined above were examined between April 2007 and April 2008 at monthly intervals. Temperature, salinity and dissolved oxygen were measured monthly at every site (see Fig 2-6) at 1 m intervals from the surface (0 m) to the bottom of the water column, allowing the construction of vertical profiles. The exact depth of each profile was recorded where the bottom did not fall exactly on a 1 m interval. Turbidity (NTU) and pH of surface waters were tested at every site. Three replicate samples at every site each month were taken for turbidity measurements and then averaged for graphing purposes. Dissolved nutrients (ammonia, nitrate plus nitrite (NOx) and soluble reactive phosphorous) and silica were sampled monthly from surface waters at key sites within each estuary. Bottles, syringes and filters were supplied by Analytical Services Tasmania (AST). Samples were kept on ice until returning to the Marine Research Laboratories (MRL) where the silica samples were refrigerated and the dissolved nutrient samples were frozen until they were transferred to AST for analysis within a week of collection. Ammonia, nitrate plus nitrite, dissolved reactive phosphorous and silica were quantified by AST at their NATA accredited laboratory using the APHA Method 4500. Chlorophyll a - One litre of water was taken from just below the surface at key sites within each estuary for chlorophyll a analysis at the Marine Research Laboratories (MRL), TAFI. Samples were transported to the MRL on ice where the sample was filtered through Whatman GF/C glass microfibre filters, recording the total volume of water filtered. The filters were folded, wrapped carefully in aluminium foil and frozen until analysis could be completed. Frozen filters were cut into small pieces and added to 10 mL of 90% acetone solution. The filter papers were then macerated in solution for approximately 10 seconds each using a cell disruptor. Tubes were then covered in aluminium foil to block out light and placed in a refrigerator for 12 hours. Tubes were then centrifuged for 15 minutes at 4 500 rpm. Extract was transferred into a glass 1 cm cuvet cell and placed into a Cintra 10 e spectrophotometer. Absorbance readings were taken at 630 nm, 647 nm, 664 nm and 750 nm with three replicate readings for every sample. These replicates were averaged to give the sample reading and the % standard deviation using the Cintra software package. Chlorophyll a levels were then determined using the Golterman and Clymo equation – see http://dipin.kent.edu/chlorophyll.htm. Benthic macroinvertebrates - Sediment samples for assessment of invertebrate fauna are collected in shallow water using a hand-held 150 mm diameter PVC pipe corer (sediment depth 100 mm; sample area 0.0177 m2). In deeper water sediment samples are collected either by a diver using the PVC pipe corer or from a boat using a Van Veen Grab (sampling area 0.05 – 0.1 m2). Five replicate cores were taken from each of the key sites within each estuary during Spring 2007. Two methods were utilised for sampling benthic macroinvertebrates. At shallow sites, five sediment cores were collected from 0.5 m depth using a benthic corer (150 mm diameter, 100 mm deep), whereas at the deeper sites, five benthic grab samples were collected using a Van Veen grab. Sediment samples were washed through a 1 mm mesh sieve and the material retained was collected and stored in 10% formalin/seawater solution for a minimum of 48 hours to ensure complete fixation. It was then stored in 70% alcohol. Invertebrates were sorted and identified to the lowest possible taxonomic level and each taxa counted by staff at the MRL, TAFI. Results of the benthic macroinvertebrate survey completed during Spring 2007 will be released in a supplementary report in late 2008.
Hierarchy level
Dataset

Metadata

Metadata identifier
287ad68a-a1fb-4379-9bab-017c675f46da

Language
English
Character encoding
UTF8

Point of contact

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - IMAS Data Manager
Parent metadata
  • Baseline coastal and estuarine condition assessment of the southern NRM region, Tasmania

Type of resource

Resource scope
Dataset
Metadata linkage
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/287ad68a-a1fb-4379-9bab-017c675f46da

Point of truth URL of this metadata record

Date info (Creation)
2021-03-30T21:46:33
Date info (Revision)
2021-03-30T21:46:33

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


Keywords

Abundance - benthic macroinvertebrates Ammonia Benthic macroinvertebrates Chlorophyll a Degradation Dissolved oxygen Human impact Monitoring program Nitrate plus Nitrite Reactive phosphorus Salinity Silica Temperature Turbidity pH
Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
ANIMALS/INVERTEBRATES BENTHIC HABITAT CHLOROPHYLL ESTUARINE HABITAT INTERTIDAL ZONE NUTRIENTS SALINITY TURBIDITY WATER TEMPERATURE

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Associated resources

Not available


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