European Diatom Database-Surface Waters Acidification Programme
Entry ID: uk_nc_eddi_swap

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Summary
Abstract: The European Diatom Database (EDDI) is a web-based information system designed
to enhance the application of diatom analysis to problems of surface water
acidification, eutrophication and climate change.

The Surface Waters Acidification Programme (SWAP) calibration training set
included initially 178 surface sediment diatom assemblages and the associated
environmental variables from 170 sites. Data-screening reduced these to 167
lakes, which using weighted averaging give superior results in terms of lowest
root mean squared errors of prediction in cross-validation (Birks et al. 1990a;
Birks et al. 1990b). The refined diatom/water chemistry training set used
within the SWAP project is derived from five regional datasets (number of
samples in parentheses) from Sweden (30), Norway (51), Scotland (60), Wales
(32) and the English Lake District (5). These sites represent upland lakes in
Britain and both upland and lowland lakes in Scandinavia with a bias towards
acidic waters. Using gravity or a piston corer, surface sediment samples were
usually taken from the deepest point in each lake and in all cases the top 0.5
cm was used for diatom preparation. A total of approximately 500 diatom valves
per sample were counted. As a result of the considerable variation in taxonomic
and nomenclatural usage between diatomists in different laboratories a
programme of taxonomic harmonization was undertaken to construct a common
diatom dataset (Munro et al. 1990). The development and application of the SWAP
training set is very well documented in the publications cited below and in
many subsequent projects which have applied SWAP training set in other contexts
or compared its performance with that of new training sets.

Parent DIF
This data set description is a member of a collection. The collection is described in
uk_nc_eddi


Geographic Coverage
 N: 64.8 S: 52.18  E: 17.53  W: -5.65

Data Set Citation
Dataset Originator/Creator: SWAP Participants
Dataset Title: European Diatom Database-Surface Waters Acidification Programme
Dataset Release Place: Newcastle upon Tyne, United Kingdom
Dataset Publisher: The University of Newcastle


Temporal Coverage
Start Date: 1979-01-01
Stop Date: 1987-01-01


Location Keywords
CONTINENT > EUROPE > NORTHERN EUROPE > SCANDINAVIA > NORWAY
CONTINENT > EUROPE > NORTHERN EUROPE > SCANDINAVIA > SWEDEN
CONTINENT > EUROPE > NORTHERN EUROPE > BRITISH ISLES > UNITED KINGDOM > Scotland
CONTINENT > EUROPE > NORTHERN EUROPE > BRITISH ISLES > UNITED KINGDOM > Wales
CONTINENT > EUROPE > NORTHERN EUROPE > BRITISH ISLES > UNITED KINGDOM > England


Science Keywords
TERRESTRIAL HYDROSPHERE >SURFACE WATER >LAKES >LAKEWATER CHEMICAL DATA    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >ALKALINITY    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >CONDUCTIVITY    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >NITROGEN COMPOUNDS    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >PH >LAKEWATER PH TRANSFER FUNCTION    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >TRACE METALS    [Definition]
LAND SURFACE >EROSION/SEDIMENTATION >SEDIMENT CHEMISTRY >SURFACE SEDIMENT SAMPLES    [Definition]
LAND SURFACE >EROSION/SEDIMENTATION >SEDIMENTS >SURFACE SEDIMENT SAMPLES    [Definition]
BIOLOGICAL CLASSIFICATION >PROTISTS >DIATOMS    [Definition]
BIOLOGICAL CLASSIFICATION >PLANTS >MICROALGAE >DIATOMS
BIOSPHERE >AQUATIC ECOSYSTEMS >LAKES    [Definition]


ISO Topic Category
BIOTA
ENVIRONMENT
GEOSCIENTIFIC INFORMATION
INLAND WATERS


Quality
Data-screening reduced the 170 lakes to 167 lakes, which using
weighted averaging give superior results in terms of lowest root mean
squared errors of prediction in cross-validation (Birks et al. 1990a;
Birks et al. 1990b).


Access Constraints
None


Use Constraints
None


Keywords
The European Diatom Database
surface-sediment diatom assemblages
surface water acidification
eutrophication
climate change
Plantae
Plant
Chromista
Bacillariophyta
alkalinity
aluminium
calcium
chloride
conductivity
iron
magnesium
manganese
maximum depth of lake
nitrate
pH
potassium
silica
sodium
sulphate
total nitrogen
total organic carbon
total phosphorus
water depth of diatom sample
zinc


Data Set Progress
COMPLETE


Data Center
European Diatom Database, University of Newcastle, UK    [Information]
Data Center URL: http://craticula.ncl.ac.uk/Eddi/jsp/
Dataset ID: SWAP

Data Center Personnel
Name: STEPHEN JUGGINS
Phone: 44 191 222 8799
Fax: 44 191 222 5421
Email: Stephen.Juggins at ncl.ac.uk
Contact Address:
University of Newcastle
Department of Geography
Newcastle upon Tyne
NEI 7RU
Country: UNITED KINGDOM



Distribution
Fees: None


Personnel
RICK BATTARBEE
Role: TECHNICAL CONTACT
Phone: 44 20 7679 7582
Fax: 44 20 7679 7565
Email: rbattarb at geog.ucl.ac.uk
Contact Address:
Environmental Change Research Centre,
Department of Geography,
26 Bedford Way,
University College London,
City: London
Postal Code: WC1H 0AP
Country: United Kingdom


JOHN BIRKS
Role: TECHNICAL CONTACT
Phone: 47 55 583350
Fax: 47 55 589667
Email: John.Birks at bot.uib.no
Contact Address:
Botanical Institute, University of Bergen,
City: Allegaten 41
Province or State: Bergen
Postal Code: N-5007
Country: Norway


STEPHEN JUGGINS
Role: TECHNICAL CONTACT
Phone: 44 191 222 8799
Fax: 44 191 222 5421
Email: Stephen.Juggins at ncl.ac.uk
Contact Address:
University of Newcastle
Department of Geography
Newcastle upon Tyne
NEI 7RU
Country: UNITED KINGDOM


TYLER B. STEVENS
Role: DIF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


Publications/References
Birks, H. J. B., S. Juggins, et al. (1990). Lake surface water chemistry
reconstructions from palaeolimnological data. The Surface Waters Acidification
Programme. B. J. Mason, Cambridge University Press:301-313.

Birks, H. J. B., J. M. Line, S. Juggins, A.C. Stevenson & C.J.F. ter Braak.
(1990). Diatoms and pH reconstruction. Philosophical Transactions of the Royal
Society of London, B 327: 263-278.

Stevenson, A.C., S. Juggins, H.J.B. Birks, D.S. Anderson, N.J. Anderson, R.W.
Battarbee, F. Berge, R.B. Davis, R.J. Flower, E.Y. Haworth, V.J. Jones, J.C.
Kingston, A.M. Kreiser, J.M. Line, M. M.A.R. & I. Renberg, 1991. The Surface
Waters Acidification Project Palaeolimnology Programme: Modern Diatom/
Lake-Water Chemistry Data-Set. ENSIS Ltd., London: 86 pp.

Creation and Review Dates
DIF Creation Date: 2002-09-23
Last DIF Revision Date: 2012-12-21
Future DIF Review Date: 2003-09-23

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