Ordination of the integrated monitoring data gathered under auspices of ICP-IM, UN-ECE Convention on Long-Range Transboundary Air Pollution: 1989-1994
This report contains a limited number of exploratory multi-variate statistical gradient analyses of cause effect relationships in the data which are gathered in the framework of the International Co-operative Programme on Integrated Monitoring of Air Pollution Effects on Ecosystems (ICP-IM), which is executed under auspices of the UN-ECE Convention on Long Range Transboundary Air Pollution.
From the results of the individual ordination exercises, it can be concluded that this type of statistical technique is capable of revealing underlying structure and major cause-effect relationships in complex ecological data, provided that gradients analysed have an adequate range to be interpolated. Due to the fact that the data obtained are unexpectedly poor in the span of environmental gradients, the results of the presented statistical ordination only indicate cause-effect relationships with a limited validity. The poor span of gradients can be attributed to the relative scarcity of biological effect data as compared to the large amount of chemical data available.
|Author(s)||Zwart D de|