IMAS Metadata Catalogue
Abundance and distribution of coastal, inshore zooplankton in the Huon Estuary and D'Entrecasteaux Channel, Tasmania: Grazing study in North West Bay (1-2 October, 2006)
Mesozooplankton community composition and structure were examined throughout the D’Entrecasteaux Channel, Huon Estuary and North West Bay, Tasmania. The data represented by this record was collected as part of a grazing study conducted in North West Bay (1-2 October, 2006).
The grazing impacts of microzooplankton and mesoplankton on the phytoplankton communities were examined during several process studies. Experiments with mesozooplankton grazers were restricted to dominant omnivorous copepods (e.g. Acartia tranteri, Paracalanus indicus, Centropages australiensis) cladocerans and appendicularians. Grazing rates of microzooplankton reached as high as 96% of daily primary production, while that of mesozooplankton herbivours was never greater than 20%. Trophic interactions between the species are complicated by the recent arrival of the heterotrophic dinoflagellate Noctiluca scintillans to the region. This species grazes heavily on phytoplankton, smaller zooplankton and faecal pellets. Noctiluca scintillans accounted for up to 20% of mesozooplankton abundance in autumn and it is capable of both suppressing zooplankton abundance and reducing the sedimentation of faecal pellets to the seafloor.
Simple
Identification info
- Date (Creation)
- 2007-10-12T14:40:00
Principal investigator
Tasmanian Aquaculture and Fisheries Institute (TAFI) - Swadling, Kerrie Dr
Private Bag 49
Hobart
TAS
7001
Australia
- Purpose
- As part of the FRDC project entitled A whole-of-ecosystem assessment of environmental issues for salmonid aquaculture (FRDC number 2004/074; Aquafin CRC project number 4.2(2)), studies of mesozooplankton were initiated in 2004 when it was recognised that they play a critical role in the fate of nutrient cycling within the pelagic environment. The inclusion of zooplankton into the Aquafin CRC study began during Phase 2, with the commencement of regular sampling for mesozooplankton in October 2004 and grazing studies in September 2005. Few studies have examined the distribution of mesozooplankton in temperate Australian estuaries, and there is a particular dearth of studies from recent times. Until this study of the Huon Estuary and D’Entrecasteaux Channel we lacked even rudimentary baseline information concerning zooplankton biodiversity and their distributions in space and time in that region.
- Credit
- Aquafin CRC
- Status
- Completed
Principal investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Swadling, Kerrie Dr
IMAS - Taroona
Private Bag 49
Hobart
TAS
7001
Australia
- Temporal resolution
-
P0Y1M0DT0H0M0S
- Topic category
-
- Biota
Extent
N
S
E
W
))
Temporal extent
- Time period
- 2006-10-01T00:00:00 2006-10-02T00:00:00
Vertical element
- Minimum value
- 0
- Maximum value
- 20
- Identifier
- EPSG::5715
- Name
- MSL depth
- Maintenance and update frequency
- Not planned
Resource format
- Title
- Microsoft Excel (xls)
- Date
- Edition
- 2003
- Keywords (Theme)
-
- Secondary productivity
- Grazing rates
- Keywords (Taxon)
-
- Copepods
- Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
- Keywords (Discipline)
-
- Temperate Reef
- Keywords (Theme)
-
- Clearance rate
- AODN Instrument Vocabulary
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).
- Other constraints
- Please contact the researcher when accessing the dataset.
Associated resource
- Title
- Abundance and distribution of coastal inshore zooplankton in the Huon Estuary and D'Entrecasteaux Channel Tasmania 2004 to 2005
- Date (Creation)
- 2011-11-15T00:00:00
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- Richardson, A.J., McKinnon, A.D. and Swadling, K.M. (2009) Chapter 13: Zooplankton. In Report Card of Marine Climate Change for Australia; detailed scientific assessment, NCCARF Publication 05/09, ISBN 978-1-921609-03-9. Volkman, J.K., Thompson, P., Herzfeld, M., Wild-Allen, K., Blackburn, S., Macleod, C., Swadling, K., Foster, S., Bonham, P. Holdsworth, D., Clementson, L., Skerratt, J. Rosebrock, U., Andrewartha, J. and Revill, A. (2009) A whole-of-ecosystem assessment of environmental issues for salmonid aquaculture. Aquafin CRC Project 4.2(2) (FRDC Project No. 2004/074) 197 pp. Swadling K.M., Macleod, C.K., Foster, S. and Slotwinski, A.S. (2008) Zooplankton in the Huon Estuary and D’Entrecasteaux Channel: community structure, trophic relationships and role in biogeochemical cycling. Technical Report, Aquafin CRC Project 4.2(2) (FRDC Project No. 2004/074), 25 pp Revill, A.T., Holdsworth, D.G., Volkman, J.K. and Swadling, K.M. (2008) Fluxes of organic matter and lipids to sediments in the Huon estuary. Technical Report, Aquafin CRC Project 4.2(2) (FRDC Project No. 2004/074), 38 pp. Holdsworth, D.G., Revill, A.T., Volkman J.K. and Swadling, K.M. (2008) Lipids in sediment traps and sediments from North West Bay, Tasmania. Technical Report, Aquafin CRC Project 4.2(2) (FRDC Project No. 2004/074), 25 pp.
Content Information
- Content type
- Physical measurement
- Name
-
Clearance rate
- Name
- ml/individual/hour
Distribution Information
- Distribution format
-
-
Microsoft Excel (xls)
-
Microsoft Excel (xls)
Distributor
- OnLine resource
-
DATA ACCESS - grazing experiment [direct download]
- OnLine resource
-
imas:AQF_KMSwadling_Abundance_distribution_coastal_inshore_zooplankton_grazing_study_GV
MAP - Location of grazing experiment
Resource lineage
- Statement
- A grazing experiment was conducted in North West Bay (1-2 October 2006). Mesozooplankton for these experiments were obtained from slow tows with a Bongo net fitted with a closed cod-end, to reduce damage to the animals. Undamaged individuals were sorted from the cod-end, identified and a known number of one species placed in 1L bottles containing surface seawater. The bottles were incubated under in situ light and temperature for 24 hours. Natural seawater without additions was used, with the only modification being the removal of mesozooplankton grazers via a 200 um mesh screen. The density of grazers was adjusted according to their size and literature clearance rates of congeneric species. Between 10 and 20 grazers were added to each experimental bottle. Microscope counts of initial and final subsamples of the incubation water were used to calculate clearance rates for each species.
- Hierarchy level
- Dataset
- Hierarchy level
- Dataset
Instrument
Identifier
- Code
- plankton nets
Metadata
- Metadata identifier
-
c2d305d0-f7bc-41f7-843d-a4e772efa320
- 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/c2d305d0-f7bc-41f7-843d-a4e772efa320
Point of truth URL of this metadata record
- Date info (Creation)
- 2020-08-14T11:40:43
- Date info (Revision)
- 2020-08-14T11:40:43
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available