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Comments Ecology, 88(1), 2007, pp. 252â253 à 2007 by the Ecological Society of America Eva S. Lindstrom,1,2 Alexander Eiler,1 ¨ Silke Langenheder,1 Stefan Bertilsson,1 Stina Drakare,1 Henrik Ragnarsson,1 and Lars J. Tranvik1 In their paper ââDoes ecosystem size determine aquatic bacterial richness?ââ Reche et al. (2005) observed a signiï¬cant correlation between lake surface area and lake bacterial OTU (operational taxonomic unit) richness in 32 lakes. The authors propose that this relationship corroborates one of the predictions of the island-biogeography theory, i.e., that larger islands support more species than smaller islands (MacArthur and Wilson 1967). The results of Reche et al. (2005) have already been cited in support of a positive relationship between habitat size and bacterial taxonomic richness (Bell et al. 2005, Dolan 2005). We argue that the study by Reche et al. (2005) does not provide support of a causal relationship between bacterial richness and habitat size, since their conclusions are biased by incorrect merging of data sets that are not comparable and because the methods used to determine bacterial richness are not adequate. The signiï¬cant correlation between lake area and bacterial OTU numbers obtained by Reche et al. (2005) was based on data from three separate
Ecology – Ecological Society of America
Published: Jan 1, 2007
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