Vegetation communities of British lakes: a revised classification
(2006)
Duigan CA, Kovach WL, Palmer M.
Online only
This report presents the results of the statistical analysis of the enlarged dataset following the first comprehensive classification scheme for standing waters in Britain

Summary

 
 
 
Vegetation Communities of British Lakes coverThe first comprehensive classification scheme for standing waters in Britain (Palmer 1992; Palmer et al. 1992) was based on macrophyte surveys carried out by the Nature Conservancy Council (NCC) from 1124 standing waters throughout England, Scotland and Wales between 1975 and 1988.  This dataset became an important source of information used for a variety of purposes including conservation site selection and the identification of aquatic communities in the National Vegetation Classification (NVC) (Rodwell et al. 1995). The macrophyte records were also used in a number of atlases (Preston & Croft 1997; Preston et al. 2002). 
 
Since then, the NCC and its successor organisations (Countryside Council for Wales (CCW), English Nature (EN) and Scottish Natural Heritage (SNH)) have commissioned a substantial number of additional lake surveys, leading to the establishment of a much larger dataset with records from 3447 sites (310 England, 38 Wales and 3099 Scotland). The advent of the Habitats Directive (Council Directive 92/43/EEC on the conservation of natural habitats and of wild fauna and flora) and more recently the Water Framework Directive (Directive of the European Parliament and of the Council establishing a framework for Community action in the field of water policy) provided the incentive for the production of a revised classification using this larger dataset, supplemented by environmental data.
 
This report presents the results of the statistical analysis of the enlarged dataset. Differences from the previous classification are highlighted. The important components of this report include:
  • separate ecological descriptions of 11 distinct lake groups (A-J);
  • a revised key for the classification of newly surveyed sites;
  • updated distribution maps showing the distribution of sites within each lake group, supported by summary environmental data and macrophyte constancy tables;
  • the earlier Trophic Ranking Scheme (TRS) is replaced by a Plant Lake Ecotype Index (PLEX), which reflects the fit with the new classification scheme rather than a perceived simple trophic relationship.
 
 
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ISBN 1 86107 575 8
 
Please cite as: Duigan CA, Kovach WL, Palmer M., (2006), Vegetation communities of British lakes: a revised classification, Online only, ISBN 1 86107 575 8