Brief description
This dataset includes Continuous Plankton Recorder (CPR) data, as part of the Australian Plankton Survey (AusCPR) and phytoplankton from the Southern Ocean Continuous Plankton Recorder Survey (SO-CPR). The dataset comprises the phytoplankton abundance, biovolume measurements and phytoplankton colour index (PCI).To understand how CPR plankton data is analysed and how to use CPR data we recommend reading Richardson et al., 2006.
The data are made available in binned products for ease of use. As taxonomy changes over time and the ability of analysts improves with training more and more species can be identified over time. The products account for these changes and for real absences from the samples. A 0 abundance means that the species was looked for and not seen, null (empty cell) means that the species was not looked for in that sample. The products are therefore applicable for use in time series analysis.
There are a total of 9 products to choose from.
Phytoplankton data are available as either abundance or biovolume, and each of these at 4 levels of binning:
- Raw product (includes all data)
- Species product (includes all data where species have been identified)
- Genus product (includes all data binned to genus level)
- Higher taxonomic group (includes all data binned to functional groups).
(each of these products includes the phytoplankton colour index (PCI) per samples)
Plus
Derived indices (useful indices at segment level for CPR data)
The PCI is an estimate of the amount of chlorophyl in the water. The colour of the silk is measured using Pantone colour charts against a numeric scale indicating increasing greenness or chlorophyll.
0 – No colour
1 – Very Pale Green
2 – Pale Green
3 – Green
Plankton abundances were originally provided on the AODN Portal only as raw data, in flat table form (with each species recorded in a separate row), without any adjustments for taxonomy changes or real absences.
The first version of the "analysis-ready" products were first published on 21/12/2018. However, they were removed again in April 2021 because technical issues prevented them from being regularly updated.
This dataset supersedes the previous "IMOS - AusCPR: Phytoplankton Abundance" - https://catalogue-imos.aodn.org.au/geonetwork/srv/api/records/c1344979-f701-0916-e044-00144f7bc0f4 and "IMOS - AusCPR: Phytoplankton Colour Index (PCI)" - https://catalogue-imos.aodn.org.au/geonetwork/srv/api/records/e210cb45-910a-79c2-e043-08114f8c7800 (both collections were removed from the AODN Portal in March 2022, and the data has been archived).
Lineage
Maintenance and Update Frequency: asNeededBiomass
This index includes the total mass of living organisms in sea water collected through the CPR. Thus, values provided by this parameter comprise the organic carbon from the plankton.
Abundance
Abundance is measured here as total number of elements (or individuals) for a specific taxon in sea water. This derived product is provided for phytoplankton (total number of cells), zooplankton and copepods (total number of animals).
Mean total length of copepods
This index provides the mean total length of copepod in the sample.
Mean volume of cells
This index provides the mean volume of a phytoplankton cell in the sample, calculated from the individual cell size, cell morphology and cell abundance.
Total phytoplankton carbon
Total mass of phytoplankton as carbon is calculated using standard conversion factors of biovolume to carbon for each cell, then summed (Montagnes-Berges 1994, Menden-Deuer & Lessard 2000, Verity & Langdon 1984, Vogt et al 2012, Caron et al 1995).
No of species in sample
Provided for copepods, phytoplankton, diatoms, dinoflagellates as an indicator of richness.
Shannon diversity
The Shannon diversity index is a statistical metric used to quantify rarity and commonness of species in a population. Indeed, Shannon diversity accounts for both species richness (the number of species present) and species abundance (the number of individuals per species) in the analysed population. This index is provided for copepods, phytoplankton, diatoms and dinoflagellates.
Shannon evenness
Shannon evenness provides a measure of biodiversity in the population analysed. The Shannon evenness index is derived from the Shannon diversity index, dividing Shannon diversity by its maximum. Thus, Shannon evenness can vary between 0 and 1, where 1 represents a complete evenness of the species in the analysed population. In this product the Shannon evenness index is provided for copepods, phytoplankton, diatoms and dinoflagellates.
Notes
CreditAustralia’s Integrated Marine Observing System (IMOS) is enabled by the National Collaborative Research Infrastructure Strategy (NCRIS). It is operated by a consortium of institutions as an unincorporated joint venture, with the University of Tasmania as Lead Agent.
Created: 11 2021
Data time period: 25 11 2007 to 01 12 2022
User Contributed Tags
Login to tag this record with meaningful keywords to make it easier to discover
Australian Plankton Survey - Home Page (Australian Plankton Survey)
uri :
https://imos.org.au/facilities/shipsofopportunity/auscontinuousplanktonrecorder
Southern Ocean Plankton - Home Page (Southern Ocean Plankton)
uri :
https://imos.org.au/shipsofopportunity/southern-ocean-plankton
(Link to Richardson et al. 2006 paper)
doi :
https://doi.org/10.1016/j.pocean.2005.09.011
(OGC WFS help documentation)
uri :
https://help.aodn.org.au/web-services/ogc-wfs/
(CPR Product Specfication document)
uri :
http://content.aodn.org.au/Documents/AODN/Water_Sampling_Database/CPR_product_specification.pdf
(CPR Derived Indices Product Specification document)
- global : 8e594cd1-363a-4b58-b741-9fa3624adb77