BGS Hosted Metadata
Diatom taxon abundances at river sites in the Cordillera Blanca region of the Peruvian Andes, 2020
[This dataset is embargoed until July 1, 2026]. This dataset provides diatom taxon abundance data from 11 rivers in the Cordillera Blanca region of the Peruvian Andes. Benthic diatoms were collected from a 9cm2 surface on 5 submerged cobbles at each river site. Diatoms were identified and abundances determined using microscopy methods in the laboratory from each replicate, then averaged across the 5 replicates for each site. Data were collected from 7/05/2020 to 16/05/2020.
Simple
- Date (Publication)
- 2025-11-03
- Date (Creation)
- 2025-10-29
- Citation identifier
- https://catalogue.ceh.ac.uk/id/6f8b326e-d1f0-413e-b8ac-472b83c7de5e
- Point of contact
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Organisation name Individual name Electronic mail address Role University of Leeds Nicky Kerr
Point of contact University of Leeds Kerr, N.
Author University of Leeds Fell, S.C.
Author Bowburn Consultancy
Kelly, M.
Author University of Leeds Brown, L.E.
Author University of Leeds EMAIL NOT PROVIDED
Owner NERC EDS Environmental Information Data Centre Custodian NERC EDS Environmental Information Data Centre Publisher
- Access constraints
- Other restrictions
- Other constraints
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Embargoed
- Use constraints
- Other restrictions
- Spatial representation type
- Grid
- Distance
- 10 urn:ogc:def:uom:EPSG::9001
- Language
- English
- Character set
- UTF8
- Topic category
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- Biota
- Environment
- Begin date
- 2020-05-07
- End date
- 2020-05-16
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- Unique resource identifier
- WGS 84
- Distribution format
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Name Version Comma-separated values (CSV)
- Distributor contact
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Organisation name Individual name Electronic mail address Role NERC EDS Environmental Information Data Centre
Distributor
- Hierarchy level
- Dataset
- Other
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dataset
Conformance result
- Title
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Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Date (Publication)
- 2010-12-08
- Statement
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At each site, benthic diatoms were collected from five submerged cobbles. Using a sterile toothbrush, the benthic biofilm on the upper surface of each cobble was scrubbed from a 9 cm2 area using a miniature quadrat. Organic material was removed using the hot hydrogen peroxide (H2O2) method and replicate samples mounted on individual slides. Diatom valves were identified and counted using light microscopy at x 1000 magnification using phase-contrast illumination (Olympus CX43 microscope). A minimum of 500 diatom valves were identified from each replicate. Where less than 500 valves were present, all valves were counted. To determine estimates of valve density, the number of valves identified within coverslip transects was used to estimate the total number present on the whole coverslip (0.5 mL) and then multiplied to m-2 based on sample volume and rock area (9 cm2) sampled. Abundances were then averaged across the five replicates to mean diatom density (valve m-2) at each site.
Metadata
- File identifier
- 6f8b326e-d1f0-413e-b8ac-472b83c7de5e XML
- Metadata language
- English
- Character set
- 8859 Part 1
- Hierarchy level
- Dataset
- Hierarchy level name
-
dataset
- Date stamp
- 2025-11-03T10:20:39
- Metadata standard name
- UK GEMINI
- Metadata standard version
-
2.3
- Metadata author
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Organisation name Individual name Electronic mail address Role NERC EDS Environmental Information Data Centre Point of contact
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