TemperateReefBase Geonetwork Catalogue
Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone
Diatom and biogenic particle fluxes were investigated over a one-year period (2001-02) at the southern Antarctic Zone in the Australian Sector of the Southern Ocean. Two vertically moored sediment traps were deployed at 60 degrees 44.43'S 139 degrees 53.97' E at 2000 and 3800 m below sea-level. In these data sets we present the results on the temporal and vertical variability of total diatom flux, species composition and biogenic particle fluxes during a year. A detailed description of the field experiment, sample processing and counting methods can be found in Rigual-Hernandez et al. (2015).
Total fluxes of particulates at both traps were highly seasonal, with maxima registered during the austral summer (up to 1151 mg m-2 d-1 at 2000 m and 1157 mg m-2 d-1 at 3700 m) and almost negligible fluxes during winter (up to 42 mg m-2 d-1 at 2000 m and below detection limits at 3700 m). Particulate fluxes were slightly higher at 2000 m than at 3700 m (deployment average = 261 and 216 mg m-2 d-1, respectively). Biogenic silica (SiO2) was the dominant bulk component, regardless of the sampling period or depth (deployment average = 76% at 2000 and 78% at 3700 m). Highest relative contribution of opal was registered from the end of summer through early-autumn at both depths. Secondary contributors were carbonate (CaCO3) (7% at 2000 m and 9% at 3700 m) and particulate organic carbon (POC) (1.4% at 2000 m and 1.2% at 3700 m). The relative concentration of carbonate and POC was at its highest in austral spring and summer.
Diatom frustules from 61 taxa were identified over the entire experiment. The dominant species of the diatom assemblage was Fragilariopsis kerguelensis with a mean flux between 53 x 106 and 60 x 106 valves m-2 day-1 at 2000 m (annualized mean and deployment average, respectively). Secondary contributors to the diatom assemblage at 2000 and 3700 m were Thalassiosira lentiginosa, Thalassiosira gracilis var. gracilis, Fragilariopsis separanda, Fragilariopsis pseudonana, Fragilariopsis rhombica, Fragilariopsis curta and Azpeitia tabularis.
Data available: two excel files containing sampling dates and depths, raw counts, relative abundance and fluxes (valves m-2 d-1) of the diatom species, and biogenic particle fluxes found at 2000 m and 3700 m depth. Each file contains four spreadsheets: raw diatom valve counts, relative abundance of diatom species and valve flux of diatom species and biogenic particle composition and fluxes. Detailed information of the column headings is provided below.
Cup - Cup (=sample) number
Depth - vertical location of the sediment trap in meters below the surface
Mid-point date - Mid date of the sampling interval
Length (days) - number of days the cup was open
Girdle bands instead of valves were counted for Dactyliosolen antarcticus Castracane. Therefore, D. antarcticus girdles counts were not included in relative abundance calculations
Simple
Identification info
- Alternate title
- Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone
- Date (Publication)
- 2014-11-14
- Edition
- 1
- Citation identifier
-
Dataset DOI
- Title
- Information and documentation - Digital object identifier system
- Date (Publication)
- 2012-04-23
- Citation identifier
- ISO 26324:2012
- Citation identifier
- doi:10.4225/15/54656F37E04D6
Originator
Publisher
Principal investigator
Principal investigator
Principal investigator
Principal investigator
Principal investigator
Collaborator
Collaborator
Collaborator
Collaborator
Collaborator
- Name
- CAASM Metadata
- Status
- Completed
Custodian
- Topic category
-
- Biota
- Oceans
Extent
))
Extent
- Description
- Temporal Coverage
Temporal extent
- TimePeriod
- 2001-11-30 2002-09-29
- Title
- Seasonal dynamics in diatom and particulate export fluxes to the deep sea in the Australian sector of the southern Antarctic Zone
- Date (Publication)
- 2015
- Citation identifier
- 142
- Citation identifier
- doi:http://dx.doi.org/10.1016/j.jmarsys.2014.10.0
Author
- Name
- Journal of Marine Systems
- Page
- 62-74
- NASA/GCMD Earth Science Keywords
-
- EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS
- EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > DIATOMS
- EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > BIOGENIC SEDIMENTS
- Keywords
-
- Diatoms
- Biogenic Particle Flux
- NASA/GCMD Earth Science Keywords
-
- SHIPS
- R/V AA > R/V Aurora Australis
- NASA/GCMD Earth Science Keywords
-
- AMD
- AMD/AU
- CEOS
- ACE/CRC
- NASA/GCMD Earth Science Keywords
-
- CONTINENT > ANTARCTICA
- OCEAN > SOUTHERN OCEAN
- GEOGRAPHIC REGION > POLAR
Resource constraints
- Use limitation
- This metadata record is publicly available.
Resource constraints
- Access constraints
- licence
- Other constraints
- These data are publicly available for download form the provided URL.
Resource constraints
- File type
- Portable Network Graphic
- Title
- Attribution 4.0 International (CC BY 4.0)
- Website
-
https://creativecommons.org/licenses/by/4.0/legalcode
Legal code for Creative Commons by Attribution 4.0 International license
- Use constraints
- licence
- Other constraints
- This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4078_diatoms_biogenic_flux when using these data.
- Language
- English
- Character encoding
- UTF8
Distribution Information
Distributor
Distributor
Distributor
- Fees
- Free
- Planned available datetime
- 2014-11-14T00:00:00
Distributor
- Fees
- Free
- Planned available datetime
- 2014-11-14T00:00:00
- Units of distribution
- kb
- Transfer size
- 61
- Distribution format
-
- Excel, Word
- Units of distribution
- kb
- Transfer size
- 798
- Distribution format
-
- OnLine resource
-
GET DATA
Download point for the data
- OnLine resource
-
PROJECT HOME PAGE
Public information for ASAC project 1156
- OnLine resource
-
PROJECT HOME PAGE
Public information for AAS project 4078
- OnLine resource
-
VIEW RELATED INFORMATION > PUBLICATIONS
Download point for the publication
- OnLine resource
-
VIEW RELATED INFORMATION > PUBLICATIONS
Download the AADC copy of the publication - AAD Staff Only
- OnLine resource
-
VIEW RELATED INFORMATION
Citation reference for this metadata record and dataset
Resource lineage
- Statement
- Some large and/or entangled frustules of some large diatom taxa, such as Thalassiothrix, could have been be retained in the 1 mm screen mesh, and therefore, underrepresented in this study.
- Hierarchy level
- Dataset
- Maintenance and update frequency
- As needed
- Maintenance note
- 2014-11-14 - record created by Dave Connell from a template completed by Andres Rigual Hernandez. 2016-06-14 - record updated by Dave Connell to add a publication.
Metadata
- Metadata identifier
- string/AAS_4078_diatoms_biogenic_flux
- Language
- English
- Character encoding
- UTF8
Author
Sponsor
Owner
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 76f6636a-b400-4773-8ea3-d5fe0b8c52ce
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Date (Last Revision)
- 2015-11-29T18:06:24
Identifier
- Description
- metadata.extraction_date
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 8.6
- Metadata linkage
-
http://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux
Point of truth for the metadata record
- Date info (Creation)
- 2014-11-14T00:00:00
- Date info (Last Update)
- 2017-04-26
Metadata standard
- Title
- ISO 19115-3
- Edition
- 2014
- Other citation details
- Version 1
- Title
- DIF to ISO 19115-1 Profile
Overviews
Spatial extent
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