Ali, M.M, Murphy, K.J., and Abernethy, V.J. (1999) Macrophyte functional variables versus species assemblages as predictors of trophic status in flowing waters. Hydrobiologia, 415 . pp. 131-138. ISSN 0018-8158
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Publisher's URL: http://link.springer.com/article/10.1023/A%3A1003833419359?null
A series of models was developed using functionally-derived variables (mainly based on morphological attributes of freshwater macrophytes) to predict the trophic status of river and associated channel systems. The models were compared with an existing species-assemblage based procedure for predicting British river trophic conditions (the Macrophyte Trophic Ranking scheme, MTR). We compared sites in cooler temperate conditions (in Scotland) and warmer, sub-tropical conditions (in Egypt). In total, we made measurements of 13 traits from >600 individual plant specimens of 33 species growing at 42 sites (divided into independent input and test site datasets). N status (as annual mean concentration in water of total oxidised nitrogen, TON) was only very poorly predicted by this approach. However, P (as annual mean concentration in water of soluble reactive phosphate, SRP) was better predicted: both by a model based on MTR (r =
|Glasgow Author(s):||Murphy, Dr Kevin|
|Authors:||Ali, M.M, Murphy, K.J., and Abernethy, V.J.|
|College/School:||College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine|