Title: Lake Benthic Macroinvertebrates 1: Improving Sampling Methodology
Author: Environment Agency
Document Type: Monograph
Annotation: Environment Agency Project ID:EAPRJOUT_1620, Representation ID: 558, Object ID: 2728
Abstract:
In order to fulfill the requirements of the Water Framework Directive on using biological indicators in assessing water quality and classifying water bodies, the existing Environment Agency method for collecting littoral invertebrates and the SEPA (Scottish Environmental Protection Agency) method for sampling profundal invertebrates have been reviewed and revised. Fundamentally, the existing methods were deemed suitable for producing data that can be used in the classification of standing waters and to produce necessary diagnostic tools and predictive models. Nevertheless, some revision was necessary, and the mesohabitats sampled using the littoral method have now been clearly defined and limited to two major types - hard substrate and vegetated areas dominated by submerged macrophytes. The objective of this modification was to reduce noise in the dataset and potentially improve model predictions. Minor alterations were also made to the profundal method, and both revised methods are included in Annex I. Additional recommendations address sample site parameters, levels of taxonomic identification and sample times. The suggested list of parameters incorporates parameters required by the Water Framework Directive and includes both parameters which are not influenced by humans (for use in the classification of sites), and variables which are influenced by humans (for inclusion in predictive tools). In terms of taxonomic level, species level identification has been proposed, in order to facilitate the production of the best possible tools. Finally, given the constraints on resources, a single sample per season per method has been advised.
Publisher: Environment Agency
Subject Keywords: Water Framework Directive; Lakes; Littoral zone; Invertebrates; Sampling; Loughs; Lochs; Benthic environment
Extent: 64
Permalink: http://www.environmentdata.org/archive/ealit:4776
Total file downloads: 245
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