European Diatom Database-East African Dataset

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Francoise Gasse
Publication_Date: Unknown
Title: European Diatom Database-East African Dataset
Edition:
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place: Newcastle upon Tyne, United Kingdom
Publisher: The University of Newcastle
Other_Citation_Details:
Online_Linkage: http://craticula.ncl.ac.uk/Eddi/jsp/datasetdesc.jsp?DatasetId=AfricaE
Description:
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 East African training set includes samples from 98 sites situated between 19N and 14S in latitude, 27N and 43E in longitude. They range from afro-alpine bogs at altitude of up to 4000 m to hypersaline lakes lying below sea-level. The conductivity ranges from 40 to 50,000 S cm-1 and the pH from 5 to 10.9. The chemical facies is of the alkaline earths/bicarbonate type for freshwaters, to the Na/carbonate or Na/chloride type for highly concentrated waters. The training set consists of 187 samples. Most samples have been collected by F. Gasse (98) from 1970, P. Kilham (19), J.-F. Talling (14) and R.B. Wood (14). Other collaborators in collecting diatom samples have been C. Barton, R.M. Baxter, J. Green, J. Kalff, ad J. L. Richardson. All diatom samples were counted by F. Gasse. Detailed descriptions of the diatom samples and chemical analyses were published by Gasse et al. (1983). This paper also provides a numerical classification of the diatom assemblages. A total of 579 taxa was identified in the data set, the taxonomy and ecology of which are discussed and illustrated by Gasse (1986a). This data set was used to develop transfer functions for estimating pH (Gasse and Tekaia, 1983) and conductivity (Gasse and Tekaia, unpublished) and the model has subsequently been applied to diatom sequences to reconstruct lake pH and salinity histories and related changes in the water balance (e.g. Gasse, 1986b ; Barker, 1990 ; Barker et al., 1991).
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Barker, P.A., 1990. Diatoms as palaeolimnological indicators : A reconstruction of late Quaternary environments in two East African salt lakes. Thesis. Loughbourough Univ., 267 pp. Barker, P., Gasse, F., Roberts, N., et Taieb, M., 1991. Taphonomy and diagenesis in diatom assemblages: a Late Pleistocene palaeoecological study from Lake Magadi, Kenya. In E. Smith (Ed), Environmental History and Paleolimnology, Kluwer Ac. Press., Dordrecht. Gasse, F., Talling, J.F. & Kilham, P., 1983. Diatom assemblages in East Africa: classification, distribution and ecology. Rev. Hydrobiol. Trop. ,16, 1, 3-34. Gasse, F. & Tekaia, F., 1983. Transfer functions for estimating paleocological conditions (ph) from East African diatoms. Hydrobiologia, 103, 85-90. Gasse, F., 1986b. East African diatoms and water pH. In: Smol et al. Eds., Diatoms and Lake Acidity. Developments in Hydrobiology, 29, 149-168. Junk Publ., Dordrecht. Gasse, F., 1986a. East African Diatoms. Taxonomy, ecological distribution. Bibliotheca Diatomologica. Bd 11, 202 pp. .J. Cramer, Stuttgart.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19600101
Ending_Date: 19861231
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 2.32
East_Bounding_Coordinate: 41.7
North_Bounding_Coordinate: 13.32
South_Bounding_Coordinate: -9.5
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > LAKES > LAKEWATER CHEMICAL DATA
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > ALKALINITY
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > CONDUCTIVITY
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > NITROGEN COMPOUNDS
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > PH > LAKEWATER PH TRANSFER FUNCTION
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > TRACE METALS
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENT CHEMISTRY > SURFACE SEDIMENT SAMPLES
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENTS > SURFACE SEDIMENT SAMPLES
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > DIATOMS
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > LAKES
Theme_Keyword: The European Diatom Database
Theme_Keyword: Surface-sediment Diatom Assemblages
Theme_Keyword: Surface Water Acidification
Theme_Keyword: Eutrophication
Theme_Keyword: Climate Change
Theme_Keyword: Plantae
Theme_Keyword: Plant
Theme_Keyword: Chromista
Theme_Keyword: Bacillariophyta
Theme_Keyword: Alkalinity
Theme_Keyword: Calcium
Theme_Keyword: Chloride
Theme_Keyword: Conductivity
Theme_Keyword: Magnesium
Theme_Keyword: Maximum Depth Of Lake
Theme_Keyword: Ph
Theme_Keyword: Potassium
Theme_Keyword: Salinity
Theme_Keyword: Silica
Theme_Keyword: Site Surface Area At Time Of Sampling
Theme_Keyword: Sodium
Theme_Keyword: Sulphate
Theme_Keyword: Total Phosphorus
Theme_Keyword: Water Depth Of Diatom Sample
Theme_Keyword: BIOTA
Theme_Keyword: ENVIRONMENT
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: INLAND WATERS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > AFRICA > EASTERN AFRICA > ETHIOPIA
Place_Keyword: CONTINENT > AFRICA > EASTERN AFRICA > MALAWI
Place_Keyword: CONTINENT > AFRICA > WESTERN AFRICA > NIGER
Place_Keyword: CONTINENT > AFRICA > EASTERN AFRICA > TANZANIA
Place_Keyword: CONTINENT > AFRICA > EASTERN AFRICA > UGANDA
Place_Keyword: CONTINENT > AFRICA > EASTERN AFRICA
Access_Constraints: None
Use_Constraints:
None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: FRANCOISE GASSE
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: CNRS-CEREGE, Europole Mediterraneen de l'Arbois- BP80
City: Aix en Provence Cedex 04
Postal_Code: 13545
Country: France
Contact_Voice_Telephone: 33 4 42 97 15 70
Contact_Facsimile_Telephone: 33 4 42 97 15 95
Contact_Electronic_Mail_Address: gasse@cerege.fr
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U-NCL/EDDI > European Diatom Database, University of Newcastle, UK
Contact_Person: STEPHEN JUGGINS
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: University of Newcastle
Address: Department of Geography
Address: Newcastle upon Tyne
Address: NEI 7RU
Country: UNITED KINGDOM
Contact_Voice_Telephone: 44 191 222 8799
Contact_Facsimile_Telephone: 44 191 222 5421
Contact_Electronic_Mail_Address: Stephen.Juggins@ncl.ac.uk
Resource_Description: AfricaE
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://craticula.ncl.ac.uk/Eddi/jsp/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20020923
Metadata_Review_Date: 20121221
Metadata_Future_Review_Date: 20030923
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: TYLER B. STEVENS
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NASA Goddard Space Flight Center
Address: Global Change Master Directory
City: Greenbelt
State_or_Province: MD
Postal_Code: 20771
Country: USA
Contact_Voice_Telephone: (301) 614-6898
Contact_Facsimile_Telephone: 301-614-5268
Contact_Electronic_Mail_Address: Tyler.B.Stevens@nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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