Date (Publication)

2018-06-27

Identifier

https://catalogue.ceh.ac.uk/id/2ad542be-e883-4c6e-b198-7d49da62208c

Identifier

doi: / 10.5285/2ad542be-e883-4c6e-b198-7d49da62208c

Other citation details

Laize, C.L.R., Barker, L.J., Edwards, F.K. (2018). Simulated monthly biological indicators for England and Wales 1964-2012. NERC Environmental Information Data Centre 10.5285/2ad542be-e883-4c6e-b198-7d49da62208c

Maintenance and update frequency

unknown Unknown

GEMET - INSPIRE themes, version 1.0

• Hydrography

GEMET - Concepts, version 4.1.3

• water scarcity
• drought

GeoNames

• England
• Wales

Keywords

• Historic Drought
• Standardised Streamflow Index
• SSI
• Biological Indicators
• Average Score per Taxon
• ASPT
• Lotic-invertebrate Index for Flow Evaluation
• LIFE

Access constraints

otherRestrictions Other restrictions

Other constraints

no limitations

Use constraints

otherRestrictions Other restrictions

Other constraints

This resource is made available under the terms of the Open Government Licence

Use constraints

otherRestrictions Other restrictions

Other constraints

You must acknowledge the use of Environment Agency using the following statement: © Environment Agency copyright and/or database right 2012. All rights reserved.

Use constraints

otherRestrictions Other restrictions

Other constraints

If you reuse this data, you should cite: Laize, C.L.R., Barker, L.J., Edwards, F.K. (2018). Simulated monthly biological indicators for England and Wales 1964-2012. NERC Environmental Information Data Centre https://doi.org/10.5285/2ad542be-e883-4c6e-b198-7d49da62208c

Spatial representation type

textTable Text, table

Metadata language

EnglishEnglish

Character set

utf8 UTF8

Topic category

• Environment

Begin date

1964-01-01

End date

2012-12-31

Unique resource identifier

OSGB 1936 / British National Grid

Distribution format

• Comma-separated values (CSV) ()

OnLine resource

Download the data

Download a copy of this data

OnLine resource

Supporting information

Supporting information available to assist in re-use of this dataset

Hierarchy level

dataset Dataset

Other

dataset

Statement

Biological indicator ASPT and LIFE (family and species levels) were obtained for 86 sites from the EA Freshwater and Marine Biological Surveys for Invertebrates England database (commonly known as 'BIOSYS'). Biological records for the UK typically exhibit an annual positive trend and seasonal offset (higher values in spring); bio-indicators were therefore de-trended and de-seasonalised by fitting linear regression models (season and year as predictors) then subtracting the fitted bio-indicator values from the raw indicator data. Monthly SSI series for period 1964-2012 for the 76 gauging stations paired to the 86 BIOSYS sites were derived using 6-month accumulation period and Tweedy distribution. Seven predictors were assembled: SSI on same monthly date as biological indicators, and six lagged SSI (6, 12, 18, 24, 30, and 36 months prior to date of biological indicators). For each bio-indicator, a model of the indicator's response to the SSI predictors was fitted using Multi-Level modelling and Multi-Model Inference. Models were then run with the whole SSI dataset to produce the final dataset of simulated de-trended/de-seasonalised ASPT, LIFE Family and LIFE Species series for period 1964-2012.

File identifier

2ad542be-e883-4c6e-b198-7d49da62208c XML

Metadata language

EnglishEnglish

Character set

ISO/IEC 8859-1 (also known as Latin 1) 8859 Part 1

Hierarchy level

dataset Dataset

Hierarchy level name

dataset

Date stamp

2025-11-13T16:22:50

Metadata standard name

UK GEMINI

Metadata standard version

2.3