Vegetation Communities of British Lakes
Vegetation communities of British lakes: a revised classification Vegetation communities of British lakes: a revised classification Catherine Duigan, Countryside Council for Wales, Penrhos Road, Bangor, Gwynedd, LL57 2DW Warren Kovach, Kovach Computing Services, 85 Nant Y Felin, Pentraeth, Anglesey, LL75 8UY Margaret Palmer, Nethercott, Stamford Road, Barnack, Stamford, PE9 3EZ Joint Nature Conservation Committee, Monkstone House, City Road, Peterborough, PE1 1JY © JNCC 2006 ISBN-13 978 1 86107 575 8 ISBN-10 1 86107 575 8 1 2 Contents List of tables and figures 5 Summary 6 Chapter 1 Introduction 7 Chapter 2 Survey method 9 Chapter 3 The dataset, data analysis and the Plant Lake Ecotype Index (PLEX) 10 The dataset 10 Data analysis 10 Plant Lake Ecotype Index 12 Chapter 4 Revised classification system and lake key 14 Chapter 5 Individual descriptions of the lake groups 21 Group A Small, predominantly northern dystrophic peat or heathland pools, dominated by Sphagnum spp. 23 Group B Widespread, usually low-lying acid moorland or heathland pools and small lakes, with a limited range of plants, especially Juncus bulbosus, Potamogeton polygonifolius and Sphagnum spp. 24 Group C1 Northern, usually small to medium-sized, acid, largely mountain lakes, with a limited range of plants, but Juncus bulbosus and Sparganium angustifolium constant 25 Group C2 North western, predominantly large, slightly acid, upland lakes, supporting a diversity of plant species, Juncus bulbosus constant, often with Littorella uniflora and Lobelia dortmanna, in association with Myriophyllum alterniflorum 26 Group D Widespread, often large, mid-altitude circumneutral lakes, with a high diversity of plants, including Littorella uniflora, Myriophyllum alterniflorum, Callitriche hamulata, Fontinalis antipyretica and Glyceria fluitans 28 Group E Northern, often large, low altitude and coastal, above-neutral lakes with high diversity of plant species, including Littorella uniflora, Myriophyllum alterniflorum, Potamogeton perfoliatus and Chara spp.
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