Data · collection
Signy and Livingston diatom and water chemistry
Listed in NASA Earthdata CMR
The response of diatom species to environmental gradients was assessed by constructing this dataset of diatom abundance and water chemistry from 59 maritime Antarctic lakes.
Description
Freshwater diatom species composition is strongly related to lake water chemistry. Recently, attempts have been made to quantify these relationships using multivariate statistical methods.
This approach generally involves the collection of new data in the form of a training, or calibration, dataset, relating a modern lake surface sediment diatom assemblage to contemporary water chemistry. Environmental variables which are strongly related to diatom distribution can be identified, and the relationships quantified. These relationships, or transfer functions, can then be applied to fossil diatom assemblages from sediment cores to provide environmental reconstructions of key hydrochemical variables.
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There are a number of unusual and unique diatom forms in the Antarctic. This, together with a lack of autecological information, makes it necessary to construct a training set specifically for the Antarctic as an essential prerequisite to diatom-based environmental reconstruction. To this end, surface sediment and water chemistry data were obtained from lakes in two areas of the maritime Antarctic.
These were 45 sites from the Byers Peninsula, Livingston Island, South Shetland Islands and 14 sites on Signy Island, South Orkney Islands. For a more detailed description of this dataset refer to Jones, Juggins and Ellis-Evans (1993) Antarctic Science 5(4): 339-348.
Links
Documentation and papers
- antarctica.ac.uk /mdms/DIFDir/92347598821673.html ↗
Use related URL to access primary copy of metadata record from the BAS Metadata Management System. Gives detailed, up to date metadata description, which this DIF has been derived from.
documentation · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214608603-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214608603-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Lake/Pond · Lakes/Reservoirs · Marine Ecosystems · Not provided · Sediments
- Inferred from text
- Hydrology 74%
Provenance · 1 source records, 12 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214608603-SCIOPS | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3707 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (74%) |
| concepts[measured_variable].gcmd:earth-science/biosphere/ecosystems/freshwater-ecosystems/lake-pond | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biosphere/ecosystems/marine-ecosystems | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/paleoclimate/ocean-lake-records/sediments | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/terrestrial-hydrosphere/surface-water/surface-water-features/lakes-reservoirs | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:not-provided | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |