Aggregation of ecological indicators for mapping aquatic nature quality : overview of existing methods and case studies

M. Knotters, J. Lahr, A.M. van Oosten-Siedlecka, P.F.M. Verdonschot

Research output: Book/ReportReportProfessional

Abstract

Indicators for aquatic nature quality are calculated using ecological monitoring data from individual sampling stations. For reporting purposes, these results need to be aggregated and scaled up to higher levels (catchment area, country). This report provides an overview of different existing spatial aggregation methods for this purpose, including an evaluation of their suitability for aquatic ecological indicators. So-called „model-based„ methods, consisting of some sort of „kriging¿ step followed by calculation of the arithmetic mean, appeared to be the most appropriate. Application of these methods to multimetric indicators of aquatic macroinvertebrates in two Dutch subcatchment areas confirmed their suitability. However, the methods that were used were based on aggregation (using kriging) over Euclidian (straight), distances. It is recommended to conduct further research on the suitability of interpolation through stream networks, i.e., through the waterways themselves.
Original languageEnglish
Place of PublicationWageningen
PublisherWettelijke Onderzoekstaken Natuur & Milieu
Number of pages44
Publication statusPublished - 2010

Publication series

NameWOt-werkdocument
PublisherWettelijke Onderzoekstaken Natuur & Milieu
No.209

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Keywords

  • aquatic organisms
  • biological indicators
  • surface water
  • watersheds
  • natural value
  • spatial models
  • correlation
  • freshwater ecology
  • netherlands

Cite this

Knotters, M., Lahr, J., van Oosten-Siedlecka, A. M., & Verdonschot, P. F. M. (2010). Aggregation of ecological indicators for mapping aquatic nature quality : overview of existing methods and case studies. (WOt-werkdocument; No. 209). Wageningen: Wettelijke Onderzoekstaken Natuur & Milieu.