Techniques for assessing shingle communities - University of Sussex

Table 2. Table used to ascertain relative shingle habitat score. No. of 10 km 2 occurrences
taken from Preston et al (2002).
Species/Feature No. of 10km 2
occurrences
Anisantha madritensis 56 0.018
Arenaria serpyllifolia ssp. Leptoclados 704 0.001
Armeria maritima 1002 0.001
Atriplex glabriuscula 456 0.002
Carduus tenuiflorus 324 0.003
Crambe maritima 185 0.005
Echium vulgare 725 0.001
Galeopsis angustifolia 91 0.011
Geranium robertianum* 2450 0.005*
Glaucium flavum 184 0.005
Jasione montana 688 0.001
Lactuca saligna 3 0.333
Lathyrus japonicus 29 0.034
Lepidium ruderale 256 0.004
Linaria vulgaris 1676 0.001
Petrorhagia nanteuilii 5 0.200
Sagina maritima 403 0.002
Sedum acre 1784 0.001
Sedum album 1373 0.001
Sedum anglicum 851 0.001
Senecio viscosus 1404 0.001
Silene uniflora 750 0.001
Solanum dulcamara* 1828 0.005*
Teesdalia nudicaulis 216 0.005
Teucrium scorodonia* 2115 0.005*
Tripleurospermum maritimum 690 0.001
Vulpia ciliata ssp. Ambigua 80 0.013
Inverse/score
*arbitrary value
Invasive alien species (the scores below are arbitrary)
Centranthus ruber -0.01
Cerastium tomentosum -0.01
Urtica dioica -0.01
Perfect shingle habitat score 66.31
Techniques for assessing shingle communities 12