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Canonical correspondence analysis and related multivariate methods in aquatic ecology
After pointing out the key assumptions underlying CCA, the paper focuses on the interpretation of CCA ordination diagrams and some advanced uses, such as ranking environmental variables in importance and the statistical testing of effects are illustrated on a typical macroinvertebrate data-set.
Overview and application of the AQEM assessment system
The main objective of the European Union (EU) funded project AQEM1was to develop a framework of an assessment system for streams in Europe based on benthic macroinvertebrates that fulfils the…
Assessment of european streams with diatoms, macrophytes, macroinvertebrates and fish : a comparative metric-based analysis of organism response to stress
- D. Hering, Richard K. Johnson, Sandra Kramm, S. Schmutz, K. Szoszkiewicz, P. Verdonschot
- Environmental Science
- 1 September 2006
General recommendations on European bioassessment of streams were derived from the results, including those on land use changes, hydromorphological degradation on the microhabitat scale and general degradation gradients.
The contribution of plant uptake to nutrient removal by floating treatment wetlands
The Development of a System to Assess the Ecological Quality of Streams Based on Macroinvertebrates – Design of the Sampling Programme within the AQEM Project
The EU Water Framework Directive (WFD) requires river assessment systems based on benthic invertebrates. The AQEM project is developing, at a European scale, such a methodology, based on a comparison…
Flight distance of mosquitoes (Culicidae): A metadata analysis to support the management of barrier zones around rewetted and newly constructed wetlands
A comparative analysis of restoration measures and their effects on hydromorphology and benthic invertebrates in 26 central and southern European rivers
1. Hydromorphological river restoration usually leads to habitat diversification, but the effects on benthic invertebrates, which are frequently used to assess river ecological status, are minor. We…
Indicators of ecological change: comparison of the early response of four organism groups to stress gradients
- Richard K. Johnson, D. Hering, M. Furse, P. Verdonschot
- Environmental ScienceHydrobiologia
- 1 August 2006
The findings indicate that the nonlinear relationships of organism/metric response to stress can be used to select potentially robust early warning indicators for monitoring and assessment.
Chapter Three - From Natural to Degraded Rivers and Back Again: A Test of Restoration Ecology Theory and Practice