BRITISH BRYOLOGICAL SOCIETY
Survey of the
Bryophytes of Arable Land

 

 

The random tetrads

  • A map showing the location of each 10-km square is also available

Selection of tetrads for random sampling

Tetrads were selected from the arable regions of the country using the Landcover Map of Great Britain (Fuller, Groom & Jones, 1994). The process of selection was as follows.

Stage 1
Select those 100-km squares with at least 15% arable land. There were 22 such squares.

Stage 2
Decide how many tetrads are to be sampled in each selected 100-km square. The number of tetrads is in proportion to the total land area (not merely arable area) of each 100-km square . The purpose of this requirement was to avoid over-sampling 100-km squares with little land area. A secondary purpose was to spread the sample out, so that the most intensively arable parts of the country would not completely dominate the selection.

 
V.-c. V.-c. 100-km sq Tetrad V.-c. Locality ? Done Owner
5 S Som 31 ST12I 5 W of Taunton Yes Sam Bosanquet
5 S Som 31 ST31S 5 Ilminster Yes Sam Bosanquet
5 S Som 31 ST32A 5 E of Taunton Yes Sam Bosanquet
5 S Som 31 ST41C 5 W of Yeovil Yes Sam Bosanquet
6 N Som 31 ST53F 6 Glastonbury Yes Rumsey & Stevens
7 N Wilts 31 ST86B 7 Bradford-on-Avon Yes Jenny Dowell
7 N Wilts 41 SU27M 7 Aldbourne Yes Porley
8 S Wilts 41 SU02R 8 nr Coombe Bisset Yes Stern
8 S Wilts 41 SU25P 8 Collingbourne Yes Stern
9 Dorset 30 SY88B 9 Lulworth Yes Hill & Edwards
9 Dorset 31 ST90U 9 E of Blandford Yes Hill & Edwards
10 Isle of W 40 SZ38Y 10 nr Needles Yes BBS March 2001
11 S Hants 41 SU71H 11 S of Petersfield Yes Stern (one done already)
12 N Hants 41 SU54M 12 SW of Basingstoke Yes Rumsey, Stevens & Porley
12 N Hants 41 SU55Y 12 W of Basingstoke Yes Porley
12 N Hants 41 SU66V 12 Silchester Yes Rumsey, Stevens & Porley
15 E Kent 51 TQ92R 15 btw Rye & Romney Msh Yes Kent group (Hurr et al.)
15 E Kent 51 TQ95C 15 SW of Faversham Yes Kent group (Hurr et al.)
15 E Kent 51 TQ97V 15 Sheerness Yes Kent group (Hurr et al.)
15 E Kent 61 TR02H 15 Romney Marsh Yes Kent group (Hurr et al.)
16 W Kent 51 TQ87I 16 Isle of Grain Yes Kent group (Hurr et al.)
18 S Essex 51 TQ68G 18 Basildon Yes Richard Fisk & Tim Pyner
18 S Essex 51 TQ69I 18 Billericay Yes Richard Fisk & Tim Pyner
18 S Essex 51 TQ88Z 18 Southend Yes Richard Fisk & Tim Pyner
19 N Essex 52 TL74W 19 Clare Yes Richard Fisk
19 N Essex 52 TL84F 19 Sudbury Yes Richard Fisk
23 Oxford 42 SP32G 23 Chipping Norton Yes Jacqueline Wright (Oxford)
23 Oxford 42 SP44U 23 N of Banbury Yes Jacqueline Wright (Oxford)
24 Bucks 42 SP94E 24 E of Bedford Yes Frances Higgs
25 E Suffolk 62 TM06K 25 Stowmarket Yes Fisk & friends from N of border
25 E Suffolk 62 TM17N 25 Diss Yes Fisk & friends from N of border
26 W Suffolk 52 TL86V 26 Bury St Edmunds Yes Fisk & friends from N of border
26 W Suffolk 52 TL95U 26 W of Stowmarket Yes Fisk & friends from N of border
27 E Norfolk 63 TG13G 27 S of Sheringham Yes Norfolk group
27 E Norfolk 63 TG41R 27 NW of Yarmouth Yes Norfolk group
28 W Norfolk 53 TF90Q 28 NE of Thetford Yes Norfolk group
28 W Norfolk 62 TM08A 28 btw Thetford & Diss Yes Norfolk group
29 Cambs 52 TL39Z 29 March Yes Cambs bryo group
29 Cambs 52 TL47B 29 Willingham Yes Preston
29 Cambs 52 TL57D 29 Ely Yes Preston
29 Cambs 53 TF41B 29 Tydd St Giles Yes Preston
32 Northants 42 SP65G 32 Blakesley Yes Preston & Hill
32 Northants 42 SP97H 32 Thrapston Yes Frances Higgs
33 E Glos 42 SP03M 33 Stanway Yes Paul Smith
34 E Glos 32 SO90F 34 W of Cirencester Yes Jonathan Graham
36 Heref 32 SO43Q 36 SW of Hereford Yes Sleath
36 Heref 32 SO64V 36 Ledbury Yes Sleath
37 Worcs 32 SO84Z 37 S of Worcester Yes BBS 2004
37 Worcs 32 SO87S 37 Kidderminster Yes Mark Lawley
37 Worcs 32 SO94V 37 Evesham Yes BBS 2004
37 Worcs 32 SO95F 37 E of Worcester Yes BBS 2004
38 Warwick 42 SP46I 38 S of Rugby Yes Preston & Hill
39 Staffs 33 SJ71V 39 nr Oakengates Yes Done
39 Staffs 33 SJ81M 39 Church Eaton Yes Mark Lawley
40 Shrop 33 SJ50J 40 SE of Shrewsbury Yes SBAL meeting
40 Shrop 33 SJ51Z 40 NE of Shrewsbury Yes Hill
40 Shrop 33 SJ70V 40 SW of Albrighton Yes Mark Lawley
53 S Lincs 43 SK94V 53 Ancaster Yes Hodgetts
53 S Lincs 53 TF03T 53 E of Grantham Yes Hodgetts
54 N Lincs 44 SE71X 54 W of Scunthorpe Yes Hodgetts
54 N Lincs 44 SE91H 54 E of Scunthorpe Yes Hodgetts
54 N Lincs 53 TF07Z 54 NE of Lincoln Yes Chris Cheffings and Guy Moss
54 N Lincs 53 TF38Z 54 Louth Yes Rieser & Lammiman
54 N Lincs 54 TA01T 54 S of Hull Yes Hodgetts
55 Leics 43 SK71B 55 Melton Mowbray Yes Preston
56 Notts 43 SK63K 56 SE of Nottingham Yes Blockeel
56 Notts 43 SK73P 56 Bingham Yes Blockeel
56 Notts 43 SK75M 56 Newark Yes Blockeel
57 Derbs 43 SK47Y 57 W of Worksop Yes Blockeel
59 S Lanc 33 SJ59W 59 Newton-le-Willows Yes Lowell & Locksley
59 S Lanc 33 SJ69B 59 N of Warrington Yes Lowell & Locksley
61 SE York 44 SE64K 61 SE of York Yes Blackburn
61 SE York 44 SE85N 61 Huggate (Wolds) Yes Blackburn
61 SE York 54 TA06E 61 W of Bridlington Yes Blackburn
62 NE York 44 SE56W 62 Sutton-on-the-Forest Yes Blackburn
62 NE York 45 NZ40Z 62 S of Middlesborough Yes Blackburn
63 SW York 43 SK59I 63 Rotherham Yes Blockeel
63 SW York 44 SE40U 63 E of Barnsley Yes Blockeel
64 Mid W York 44 SE44G 64 btw York & Leeds Yes Blackburn
65 NW York 45 NZ11L 65 Caldwell nr Darlington Yes Blackburn
66 Durham 45 NZ31G 66 E of Darlington Yes Blackburn
66 Durham 45 NZ42N 66 Billingham Yes Blackburn
68 Cheviot 36 NT83D 68 nr Coldstream Yes Long
68 Cheviot 36 NT93M 68 Ford Yes Long
68 Cheviot 46 NU02E 68 Wooler Yes Long
81 Berwick 36 NT74Y 81 Eccles Yes RBGE
82 E Lothi 36 NT57Q 82 Haddington Yes RBGE
82 E Lothi 36 NT67E 82 Dunbar Yes RBGE
85 Fife 36 NT29X 85 Kirkaldy Yes Tim Robinson
85 Fife 37 NO30B 85 nr Markinch Yes Tim Robinson
89 E Perth 37 NO13U 89 N of Perth Yes .
90 Angus 37 NO64N 90 Arbroath Yes BBS SBAL Aberdeeen Meeting
91 Kincard 37 NO67X 91 Fettercairn Yes BBS SBAL Aberdeeen Meeting
91 Kincard 37 NO76P 91 nr Lawrencekirk Yes BBS SBAL Aberdeeen Meeting
92 S Aberd 38 NJ82L 92 E of Inverurie Yes BBS SBAL Aberdeeen Meeting
93 N Aberd 38 NJ74H 93 Turriff Yes BBS SBAL Aberdeeen Meeting
93 N Aberd 38 NJ75L 93 N of Turriff Yes BBS SBAL Aberdeeen Meeting
93 N Aberd 38 NJ83V 93 Methlick Yes BBS SBAL Aberdeeen Meeting
93 N Aberd 48 NK04C 93 W of Peterhead Yes BBS SBAL Aberdeeen Meeting
94 Banff 38 NJ76F 94 MacDuff Yes BBS SBAL Aberdeeen Meeting


Reference

Fuller, R. M., Groom, G. B. & Jones, A. R. (1994). The Land Cover Map of Great Britain: an automated classification of Landsat Thematic Mapper data. Photogrammetric Engineering and Remote Sensing 60, 553-562.

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