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f. Drift 5 Drift was read directly from the 1:625 000 Geological Drift maps of Great Britain. The following attributes were recorded. g. Solid geology Alluvium Lowland peat Blown sand Brick earth River and marine gravel Head Glacial gravel Boulder clay Plateau gravel Clay and flints Hill peat Drift free Information was drawn from the 1:625 000 solid geological map of Great Britain. The geological strata mapped were variously combined to produce the following shortened list: Pre-Cambrian Igneous extrusive Igneous intrusive Metamorphic Slates(Cambrian) Limestones etc :X T,R,A,S,B G,F,H,D,E, G,B a Ordovician and Silurian bl-b7 Carboniferous and Magnesian d2,e2.e4 Oolites,chalk andcornbrash Sandstones Old Red (Devonian) cl-c3 New Red (Permian) e3,e5 Bunter,etc(Triassic) fl-f6 Greensand h3-h4, h2 Other beds (Eocene) i4-i7 Coal measures d4-d6 Clays etc Lias gl-g4 Oxford, Kimmeridge glO&g14 London i3 Norwich 1 Other (Oligocene&Pliocene) i8-i12,k,kl, hl 2.2.2. Classification . g5-g9, h5 The procedure was to divide the entire British Rail network into measured, and subsequently numbered, ten mile units. Attributes or characters were recorded for each rural unit, and the unit classified, with resnect to its score, by'Indicator Species Analysis (Hill, Bunce & Shaw 1975). The ISA was taken to five levels of division producing 32 classes. Classes having fewer than 15.members were subsequently amalgamated with their closest relation (provided this could be done within the fifth division) to produce groups of more comparable size for statistical and analytical purposes. Vu 1 1 1 I.
Page 1 and 2: crirTh Tritc,r ture .-on:Rervancy C
Page 3 and 4: I. INSTITUTEOF TERRESTRIAL ECOLOGY
Page 5 and 6: SUKMARY The background of the work
Page 7 and 8: CONTENTS SUISLARY 1_ INTRODUCTION 1
Page 9 and 10: 1 INTRODUCTION 1 April 1979 to Marc
Page 11: 2.2.1 Attributes The selection of a
Page 15 and 16: 7 The derived classes provided stra
Page 17 and 18: 2.3.3 Track classes Class 1 South-E
Page 19 and 20: 11 This is another combined class i
Page 21 and 22: 13 This is largely a coal measures
Page 23 and 24: 15 This group is widely dispersed a
Page 25 and 26: 17 This class is confined to the no
Page 27 and 28: 19 Table 2.3. Sampling proportionso
Page 29 and 30: V A Table 2.4 Southern and Western
Page 31 and 32: 23 The greater diversity of vegetat
Page 33 and 34: Table 3.1. Division of sampling eff
Page 35 and 36: 27 the key was tested at a number o
Page 37 and 38: Table 3.2. Vascular plant species f
Page 39 and 40: Table 3.2. (continued) 31 Cocnearia
Page 41 and 42: Table 3.2 (continued) 33 Rhus typhi
Page 43 and 44: 3.3 Bryophytes 35 A survey of the b
Page 45 and 46: Funariahygrometrica Grimmiapuivinat
Page 47 and 48: 3.4 Animal data 39 This section rel
Page 49 and 50: Table 3.4. Bird species seen on BR
Page 51 and 52: 3.4.3 Other vertebrates Species and
Page 53 and 54: 45 DIPTERA inc. Sepsis fly Biting "
Page 55 and 56: 47 The verges and adjacent land are
Page 57 and 58: 4 DISCUSSION AND FUTURE WORK 4.1 Fi
Page 59 and 60: 5 ACKNOWLEDGEMENTS 51 We are gratef
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a mon no an an Ins a a ano APPENDIX
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