An ecological assessment system for sub-alpine lakes using macroinvertebrates - Preliminary investigationsFunded under: FP7-JRC
During 2006 data on benthic macroinvertebrates and supporting environmental parameters was successfully collected from 45 sub-alpine lakes. Several approaches were followed to develop an ecological assessment system for benthic macroinvertebrates. One approach, using a metric based on the proportion of sensitive taxa, proved too variable but is worthwhile to consider for future incorporation alongside other indices into a multimetric assessment system. The best results were achieved using a weighted average total phosphorus concentration (TP score) for each taxa to develop a metric score. The model had a highly significant relationship (r2 = 0.48, p = 0.001) with total phosphorus concentration. However, the variation explained by the model was too low for it to be recommended to national authorities in the sub-alpine ecoregion for implementation of the WFD. Although, the variance explained by the model was lower than desirable it is still possible for member states to apply the metric in an exploratory way as outlined in the results section. The approach used in this research has a wide applicability and can be followed by member states in developmental work for the Water Framework Directive. In addition, the standardised methodology used in the collection and analysis of the benthic macroinvertebrates should provide highly comparable data for use by member states in the ecoregion for future intercalibration exercises. There is still a need to further understand the lake benthic macroinvertebrate community structure and response to anthropogenic pressure in order to reduce uncertainty of developed indicators. Such problems may only be overcome by very extensive sampling campaigns across the range of typologies.
Bibliographic Reference: EUR 22558 EN (2006), 30 pp. Free of charge
Availability: Katalogue Number: LB-NA-22558-EN-C The paper version can be ordered online and the PDF version downloaded at: http://bookshop.europa.eu
Record Number: 200719441 / Last updated on: 2007-09-18
Original language: en
Available languages: en