Appendix A Summary of data for selected sites along the Thames Estuary (a) Physicochemical parameters National Distance Meanquarterlysalinity (gID Grid from Particlesize analysis(%) Reference Teddington Max Min Sediment Depth Site (TQ) Symbol weir (km) (quarter) (quarter) description < 63 J.lffi 63-212 212-600 600-1000 1-2 mm > 2 mm (m) Teddington 168715 T 0.1 0.24 (4/91)" 0.08 0 /90)" Shingle, stones on sand 1.77 5.99 10.37 2.52 3.21 76.14b 0.5 Kew 191779 K 7.0 0.24 (3/90) 0.080 /90) Ston es, shingle, debris 9.29 12.44 36.24 8.17 5.14 28.72b 0.5 on muddy sand Hammersmith 230780 HB 15.8 0.94 (3/90) 0.080/90) Sand and organic matter 7.35 16.45 74.74 0.66 0.32 0.48 Intertidal Bridge Cadogan Pier 274776 CP 23.2 2.38 (3/90) 0.080/90) Stones and debris on 25.59 11.21 47.35 2.21 0.39 13.25b 0.5 fine sand and mud South Bank 308 803 SBC 28.3 3.32 (3/90) 0.08 (1/90) Sand, organic matter 2.27 9.89 85.20 1.80 0.61 0.23 Int ertidal Centre and debris London Bridge 327 805 LB 30.4 4.97 (3/90) 0.090/90) Larg e rock s on mud 24.78 20.26 22.59 2.38 5.83 24.16b 0.5 Greenwich 383 780 GW 38.3 6.82 (3/90) 0.140/90) Silt and mud 22.54 52.34 22.05 1.05 2.02 0.00 Intertidal Woolwichi 427793 WWi 45.1 12.20 (3/90) 0.970 /90) Mud and stones 13.82 14.75 12.62 1.61 1.97 55.23 Intertidal Woolwich s 429794 WWs 45.6 " " Silt and mud 35.06 54.32 10.35 0.15 0.12 0.00 2.0 Beckton 456815 BK 48.9 13.58 (3/90) 2.040 /90) Fine mud 50.65 39.61 9.24 0.09 0.20 0.21 1.5 Crossness i 492809 XNi 53.1 17.09 (3/90) 2.510 /90) Coarse mud 34.76 48.32 16.25 0.25 0.42 0.00 Intertidal Crossness s 494809 XNs 53.3 " " Fine mud 40.05 50.76 8.46 0.11 0.20 0.42 2.0 Purfleet i 548786 Pi 61.4 20.20 (4/89) 6.030/90) Fine mud 67.43 16.35 16.13 0.02 0.00 0.07 Intertidal Purfleet s 580761 Ps 65.3 " " Fine mud 41.19 36.54 22.12 0.15 0.00 0.00 2.0 West Thurrock i 592 770 WTi 66.6 24.57 (3/90) 9.880/90) Coarse mud 44.47 45.03 9.21 0.30 0.45 0.54 Intertidal West Thurrock s 593 770 WTs 66.7 n " Coarse mud 36.10 33.99 12.07 0.27 2.03 4.54 2.0 Gravesend i 648745 GVi 73.1 26.81 (3/90) 12.61 (1/90) Sandy mud 22.54 51.21 26.19 0.06 0.00 0.00 Intertidal Gravesend s 649746 GVs 73.2 " " Coarse mud 38.36 52.54 8.57 0.53 0.00 0.00 3.0 Mucking 707808 MK 83.0 31.41 (4/89) 20.73 0 /90) Sandy mud 29.49 46.50 23.57 0.21 0.23 0.00 2.5 Blythe Sands 757805 BS 86.9 " " Mud and shells 23.80 65.26 8.72 0.45 0.60 1.17 2.0 Canvey Beach 800824 CB 91.7 32.95 (4/89) 25.960/90) Sandy mud 35.84 54.58 9.54 0.01 0.01 0.02 Intertidal Chapman Buoy 809813 CHB 93.1 " " Mud, stones, shells, 20.70 18.96 13.63 2.08 2.63 42.00 > 20.0 sodden wood and clay Allhallows 838792 AH 95.1 " " Mud and shells 37.82 35.15 20.51 0.57 0.94 5.01 Intertidal Grain Flats 877795 GF 99.6 Gen era lly > 30 " Fine sand 20.79 47.03 31.14 0.02 0.02 0.00 3.0 Southend i 888844 SEi 100.1 Generally > 30 Muddy sand and shells 14.44 65.82 12.92 0.78 0.51 5.53 Intertidal Southend s 901828 SEs 102.4 Generally > 30 Sand, stones and shell 5.83 29.42 52.34 0.39 0.48 11.54 15.0 Shoeburyness 949850 SNE 105.8 Generally > 30 Sand and shells 7.81 31.48 57.06 0.56 0.51 2.58 Intertidal East Sea Reach 955810 SR2 108.2 Generally > 30 Sand 5.71 50.50 43.28 0.29 0.07 0.15 12.0 No .2 Buoy "= Richmond (b) Biological parameters Macrofauna Meiofauna SamEliJ? me ho Mean Mean Mean Abundance Biomass Mean Mean Abundance Site Symbol andsize spp. No ±S D abundance ± SD biomass ± SD dominant(s) dominant No. spp. ± SD abundance ± SD dominant Teddington T Kick 3 min 20.3 ± 6.6 1024 ± 500 10.3 ± 6.7 G. zaddachi G. zaddachi 18.0 ± 7.4 7560 ±6042 Tobrilusgracilis Kew K Kick3min 15.1 ± 3.1 3096 ± 2000 23.2 ± 15.5 G. zaddachi G. zaddachi 17.0 ±3.4 3159 ± 755 Tobrilusgracilis Hammersmith HB Inter 0.4 m2 8.7 ±2.9 280 ± 238 1.3 ± 1.2 L. hoffmeisteri G. zaddachi 14.8 ± 4.6 387 ± 230 Daptonema setosa Bridg e Cadogan Pier CP Kick 3 min 12.0 ± 1.9 2298 ± 1081 24.2 ± 12.2 P barbatus and G. zaddaehi 17.8 ± 3.9 2515 ± 247 Daptonemasetosa G. zaddachi South Bank SBC Inter 0.4 m 2 4.5 ± 1.5 71 ± 118 0.6 ± 0.8 G. zaddachi G. zaddachi 8.5 ± 4.1 253 ± 108 Daptonemasetasa Centre Lond on Bridge LB Kick 3 min 6.4 ±3.2 678 ± 649 11.0 ± 9.4 G. zaddachi G. zaddachi 16.3 ± 3.9 3674 ± 2600 Daptonema normandica Greenwich GW Inter 0.4 m2 5.8 ± 2.5 1330 ± 1722 6.2 ± 13.3 L. hoffmeisteri L. hoffmeisteri 19.3 ± 4.0 2775 ± 2455 None Woolwichi WWi Inter 0.4 m? 6.3 ± 2.5 403 ± 350 1.2 ±0. 8 L. hoffmeisteri L. hoffmeisteri 12.3 ± 8.1 3116 ± 2850 Daptonema setosa Woolwich s WWs Day grab 0.4 m2 4.9 ± 2.3 192 ±161 1.0 ± 0.9 M. rubroniveus None 7.0 ±4.3 419 ± 407 Sabatieria punctata Beckton BK Day grab 0.4 m2 2.2 ±2.0 160 ± 393 0.7 ± 1.2 L. hoffmeisteri L. hoffrneisteri 4.5 ± 2.5 128 ± 102 None Crossness i XNi Inter 0.4 m2 4.9 ± 1.6 10243 ± 8200 28.5 ± 20.5 T. costatus T. costatus 12,8 ± 4.3 18198 ± 25198 Daptonema setosa Crossness s XNs Day grab 0.4 m2 6.2 ±2.6 404 ± 388 1.8 ± 1.9 M. rubroniveus M. rubroniveus 6.3 ± 4.0 329 ± 197 None Purfleet i Pi Inter 0.4 m2 5.7 ± 2.7 138 ± 122 1.2 ± 2.2 M. rubroniveus M. rubroniveus 14.5 ± 3.0 3712 ±3620 Sabatieria punctata Purfleet s Ps Day grab 0.4 m2 6.3 ± 3.3 1163 ± 1924 7.2 ± 11.6 T. benedeni C. volutator 5.5 ± 2.7 2426 ±3554 Sabatieriapunctata West Thurrock i WTi Inte r 0.4 m 2 6.0 ± 1.5 6838 ±3960 356.3 ± 165.6 N. diversicolor N. diversicolor 19.3 ± 2.3 8160 ± 5772 Sabatieriapunetata West Thurrock s WTs Day grab 0.4 m 2 5.8 ± 2.4 2295 ± 6789 15.7 ±42.9 C. volutator C. volutator 7.8 ± 5.8 942 ± 808 Sabatieriapunctata Gra vesend i GVi Inter 0.4 m 2 9.5 ± 1.5 5928 ± 3600 35.6 ± 39.9 T. benedeni T.benedeni 22.0 ± 7.8 10097 ± 4357 Daptonema sp. Gra vesend s GVs Day grab 0.4 m2 5.9 ± 3.2 590 ± 1553 5.5 ± 14.8 None C. valutator 14.5 ± 3.6 1198 ± 1156 Sabatieriapunetata Mucking MK Day grab 0.4 m2 8.5 ± 2.3 2630 ±2728 11.9 ± 10.5 Caulleriella N. hombergi 13.0 ± 2.5 11251 ±1136 Sabatieria punctata Blythe Sands BS Day grab 0.4 m? 6.3 ± 2.1 154 ± 115 3.0 ±2.2 N.hombergi N. hombergi 20.0 ±4.7 4798 ± 6425 None Canvey Beach CB Inter 0.4 m- 14.5 ± 4.4 535 ± 174 25.6 ± 23.6 N. hombergi N. hambergi 37.0 ±3.7 39358 ± 16042 Sabatieria punctata Chapman Buoy CHB Day grab 0.4 m2 33.3 ± 9.2 1012 ± 375 248.3 ± 270.7 S. troglodytes S. troglodytes 37.8 ± 12.1 8421 ± 5475 None Allhallows AH Inter 0.4 m2 16.9 ± 2.3 5994 ± 2285 74.3 ±30.5 T. benedeni M. balthiea 32.8 ± 7.3 48385 ± 11105 Ptycholaimellus ponticus Grain Flats GF Day grab 0.4 m 2 8.5 ± 2.3 314 ±300 9.6 ±6.9 N. hambergi N. hombergi 21.5 ± 6.6 9539 ± 6518 Sabatieriapunctata Southend i SEi Inter 0.4 m2 17.2 ±3.0 2610 ± 2135 39.7 ± 21.8 Caulleriella C. edule 36.3 ± 3.5 108357 ± 26726 None Sout hend s SEs Day grab 0.4 m2 20.5 ± 8.5 350 ± 143 10.6 ± 4.1 None N. hombergi 28.8 ± 4.9 5536 ±2990 Riehtersia inaequalis Shoeburyness SNE Inter 0.4 m 2 16.5 ± 2.2 5111 ±5750 54.7 ±7.8 H.