Title: Analysis of 1995 Survey Data: Phase 2 Post-Survey Appraisal. Unit II: Changes in Biological Condition
Author: R T Clarke
Author: M T Furse
Author: J Davy-Bowker
Author: Environment Agency
Document Type: Monograph
Annotation: Environment Agency Project ID:EAPRJOUT_1607, Representation ID: 12, Object ID: 1342
Abstract:
Phase 2 of this R&D project aims to provide a comprehensive appraisal of the information content and performance of the 1995 General Quality Assessment (GQA) survey and of the changes between the 1990 River Quality Survey (RQS) and 1995 GQA survey. The implications of its results are to be taken into consideration in formulating the procedures to be used in the 2000 GQA survey. This phase aims to increase understanding of the spatial and temporal relationships between taxonomic distribution, biological condition, environmental characteristics, landscape type and the sources of environmental stress and pollution thought to be operating on each site. The reporting of Phase 2 is divided into three units : Unit I: Taxon distribution studies : R&D Technical Report E103 (Davy-Bowker et al. 2000) Unit II: Changes in biological condition : R&D Technical Report E101 (Clarke et al. 1999) this report Unit III: Post-survey appraisal : R&D Technical Report E102 (Furse et al. 1999) This report contains summaries of the: - patterns of distribution of biological condition in 1995, especially in relation to RIVPACS environmental variables - changes in biological condition between matched sites in 1990 and 1995, incorporating measures of the statistical significance of change in biological grade - changes in biological condition in relation to site environmental characteristics and Institute of Terrestrial Ecology landscape type data obtained from Environment Agency regions on the known or suspected sources of environmental stress operating on each of the GQA sites - relationships between biological condition or change in condition and the type and severity of any environmental stress or pollution.
ISBN: 1-85705-658-2
Publisher: Environment Agency
Publication Date: 1999
Publication Place: Bristol (UK)
Subject Keywords: Rivers; Canals; Invertebrates; Water quality; Biological surveys; Data processing; Freshwater ecology
Extent: 150
Permalink: http://www.environmentdata.org/archive/ealit:4405
Total file downloads: 226
Download PDF Display PDF in separate tab