A critical evaluation of the use of cluster analysis to identify contaminated sediments in the Ría de Vigo (NW Spain)
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Autónoma de Baja California
2001
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| _version_ | 1876446809764659200 |
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| author | B. Rubio |
| author_facet | B. Rubio |
| contents | A critical evaluation of the use of cluster analysis to identify contaminated sediments in the Ría de Vigo (NW Spain) B. Rubio M. A. Nombela F. Vilas Ciencias de la Tierra heavy metals contamination cluster analysis subtidal sediments discriminant analysis The indiscriminate use of cluster analysis to distinguish contaminated and non-contaminatedsediments has led us to make a comparative evaluation of different cluster analysis procedures as appliedto heavy metal concentrations in subtidal sediments from the Ría de Vigo, NW Spain. The use ofdifferent cluster algorithms and other transformations from the same departing set of data lead to theformation of different clusters with a clear inconclusive result about the contamination status of thesediments. The results show that this approach is better suited to identifying groups of samples differingin sedimentological characteristics, such as grain size, rather than in the degree of contamination. Ourmain aim is to call attention to these aspects in cluster analysis and to suggest that researchers should berigorous with this kind of analysis. Finally, the use of discriminant analysis allows us to find adiscriminant function that separates the samples into two clearly differentiated groups, which should notbe treated jointly. 2001 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48027202 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.27 |
| format | Artículo científico |
| id | redalyc_48027202 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Autónoma de Baja California |
| spellingShingle | A critical evaluation of the use of cluster analysis to identify contaminated sediments in the Ría de Vigo (NW Spain) B. Rubio Ciencias de la Tierra heavy metals contamination cluster analysis subtidal sediments discriminant analysis A critical evaluation of the use of cluster analysis to identify contaminated sediments in the Ría de Vigo (NW Spain) B. Rubio M. A. Nombela F. Vilas Ciencias de la Tierra heavy metals contamination cluster analysis subtidal sediments discriminant analysis The indiscriminate use of cluster analysis to distinguish contaminated and non-contaminatedsediments has led us to make a comparative evaluation of different cluster analysis procedures as appliedto heavy metal concentrations in subtidal sediments from the Ría de Vigo, NW Spain. The use ofdifferent cluster algorithms and other transformations from the same departing set of data lead to theformation of different clusters with a clear inconclusive result about the contamination status of thesediments. The results show that this approach is better suited to identifying groups of samples differingin sedimentological characteristics, such as grain size, rather than in the degree of contamination. Ourmain aim is to call attention to these aspects in cluster analysis and to suggest that researchers should berigorous with this kind of analysis. Finally, the use of discriminant analysis allows us to find adiscriminant function that separates the samples into two clearly differentiated groups, which should notbe treated jointly. 2001 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48027202 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.27 |
| title | A critical evaluation of the use of cluster analysis to identify contaminated sediments in the Ría de Vigo (NW Spain) |
| topic | Ciencias de la Tierra heavy metals contamination cluster analysis subtidal sediments discriminant analysis |
| url | https://www.redalyc.org/articulo.oa?id=48027202 |