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By J. S. Rodwell, C. D. Pigott, D. A. Ratcliffe, A. J. C. Malloch, H. J. B. Birks, M. C. F. Proctor

British Plant groups is the 1st systematic and accomplished account of all ordinary, semi-natural and significant synthetic habitats in nice Britain (excluding Northern Ireland), representing fifteen years of analysis by means of major plant ecologists. The publication breaks new floor in marriage ceremony the rigorous curiosity within the category of plant groups that has characterised Continental phytosociology with the deep conventional challenge in nice Britain to appreciate how crops works. The acclaimed sequence has develop into firmly demonstrated as a framework for a wide selection of educating, study and administration actions in ecology, conservation, and land-use making plans.

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Extra info for British Plant Communities: Volume 5, Maritime Communities and Vegetation of Open Habitats (British Plant Communities)

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P. insidiosa Ceramium rubrum Polyneura gmelinii Fucus vesiculosus Cladophora sp. Chondria dasyphylla Polysiphonia cf. P. nigrescens Enteromorpha intestinalis Ectocarpus sp. Chaetomorpha cf. C. tortuosa Porphyra umbilicalis Spartina anglica III II I I I I I I I I I I I I (1–4) (1–6) (2) (1–2) (1) (1–2) (4) (1) (1) (1–2) (1) (2) (2) (4) Number of samples 15 Shells of the cockle (Cerastoderma edule) and common periwinkle (Littorina littorea) and casts of the lugworm (Arenicola marina) occasional to very abundant in the samples; spire shell (Hydrobia ulvae), mussel (Mytilus edulis) and shore crab (Carcinus maenas) recorded less frequently.

The following should thus be seen as simply as a crude guide to identifying the types of vegetation found on salt-marshes and must always be used in conjunction with the data tables and community descriptions. It relies on floristic (and, to a lesser extent, physiognomic) features of the vegetation and demands a knowledge of the British vascular flora. It does not make primary use of any habitat features, though these may provide a valuable confirmation of a diagnosis. Because the major distinctions between the vegetation types in the classification are based on inter-stand frequency, the key works best when sufficient samples of similar composition are available to construct a constancy table.

Du Rietz 1925) Gillner 1960 Key to salt-marsh communities 25 Eleocharis uniglumis in often small stands of sometimes open vegetation SM20 Eleocharis uniglumis salt-marsh Eleocharitetum uniglumis Nordhagen 1923 Suaeda vera as an open bushy canopy with one or more of Limonium binervosum, L. , Suaeda maritima and Puccinellia maritima 4 Annual Salicornia spp. and Suaeda maritima not dominant or co-dominant 5 4 Suaeda maritima and annual Salicornia spp. , Suaeda maritima and Puccinellia maritima co-dominant in various proportions, often with a little Aster tripolium verae (Arènes SM10 Transitional low-marsh vegetation Vegetation of this kind frequently occurs as mosaics between the Salicornietum europaeae and the Puccinellietum maritimae, Spartinetum maritimae and, especially in the south-east, the Asteretum tripolii and Halimionetum portulacoidis.

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