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en:data:doubs [2017/03/02 19:16]
David Zelený [Description of the dataset (from Borcard et al. 2011)]
en:data:doubs [2018/03/30 23:04] (current)
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 ===== Description of the dataset ===== ===== Description of the dataset =====
 <wrap lo>(from Borcard et al. 2011)</​wrap>​ <wrap lo>(from Borcard et al. 2011)</​wrap>​
 +
 In an important doctoral thesis, Verneaux (1973) proposed to use fish species to characterize ecological zones along European rivers and streams. He showed that fish communities were good biological indicators of these water bodies. Starting from the source, Verneaux proposed a typology in four zones, and he named each one after a characteristic species: the trout zone, the grayling zone, the barbel zone and the bream zone. The corresponding ecological conditions, with much variation among rivers, range from relatively pristine, well oxygenated and oligotrophic to eutrophic and oxygen-deprived waters. In an important doctoral thesis, Verneaux (1973) proposed to use fish species to characterize ecological zones along European rivers and streams. He showed that fish communities were good biological indicators of these water bodies. Starting from the source, Verneaux proposed a typology in four zones, and he named each one after a characteristic species: the trout zone, the grayling zone, the barbel zone and the bream zone. The corresponding ecological conditions, with much variation among rivers, range from relatively pristine, well oxygenated and oligotrophic to eutrophic and oxygen-deprived waters.
  
-Data have been collected at 30 localities along Doubs river. The first matrix contains coded abundances of 27 fish species, the second matrix contains 11 environmental variables related to the hydrology, geomorphology and chemistry of the river, and the third matrix contains the geographical coordinates (Cartesian, X and Y) of the sites. ​+Data have been collected at 30 localities along Doubs river. The first matrix contains coded abundances of 27 fish species, the second matrix contains 11 environmental variables related to the hydrology, geomorphologyand chemistry of the river, and the third matrix contains the geographical coordinates (Cartesian, X and Y) of the sites.
 ===== Locality ===== ===== Locality =====
 Doubs river, which runs near France-Switzerland border in the Jura Mountains. Doubs river, which runs near France-Switzerland border in the Jura Mountains.
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 ===== R script for direct import of data to R ===== ===== R script for direct import of data to R =====
 <code rsplus> <code rsplus>
-doubs.spe <- read.csv ('http://www.davidzeleny.net/​anadat-r/​data-download/​DoubsSpe.csv',​ row.names = 1) +doubs.spe <- read.csv ('https://raw.githubusercontent.com/​zdealveindy/anadat-r/master/​data/​DoubsSpe.csv',​ row.names = 1) 
-doubs.env <- read.csv ('http://www.davidzeleny.net/​anadat-r/​data-download/​DoubsEnv.csv',​ row.names = 1) +doubs.env <- read.csv ('https://raw.githubusercontent.com/​zdealveindy/anadat-r/master/​data/​DoubsEnv.csv',​ row.names = 1) 
-doubs.spa <- read.csv ('http://www.davidzeleny.net/​anadat-r/​data-download/​DoubsSpa.csv',​ row.names = 1)+doubs.spa <- read.csv ('https://raw.githubusercontent.com/​zdealveindy/anadat-r/master/​data/​DoubsSpa.csv',​ row.names = 1)
    
 </​code>​ </​code>​
en/data/doubs.txt · Last modified: 2018/03/30 23:04 (external edit)