Table 1 Mean (and maximum) abundance of benthic macrofauna (ind. per m2) at Posthuiswad in 1956 and 1996–2005
From: Now an empty mudflat: past and present benthic abundances in the western Dutch Wadden Sea
Schor | Vliehors high | Vliehors low | Coast | Posthuis high | Posthuis low | Cockle beds eastside | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(1) | (2) | (3) | (4) | (5) | (6) | (7) | |||||||
1956 | 1996–2005 | 1956 | 1996–2005 | 1956 | 1996–2005 | 1956 | 1996–2005 | 1956 | 1996–2005 | 1956 | 1996–2005 | 1956 | |
Polychaeta | |||||||||||||
Are0 | 77 (622) | 30 | 34 (226) | 15 | 15 (173) | 50 | 29 (462) | 35 | 40 (346) | 40 | 32 (1,129) | 56 | |
Ete− | 0 (0) | 51 | 4 (56) | 0 (0) | 200 | 3 (173) | 70 | 4 (230) | 90 | 8 (288) | 150 | ||
*Het− | 79 (847) | 1,357 | 74 (791) | 560 | 17 (289) | 1,426 | 199 (3,465) | 1,800 | 135 (1,412) | 1,800 | 73 (4,527) | 4,860 | |
Land | 6 (195) | 14 (283) | 2 (57) | 175 (6,780) | 78 (3,955) | 59 (1,299) | 2 | ||||||
Ner0 | 77 | 33 (339) | 230 | 255 (3,465) | 108 (520) | 166 (974) | 116 (1,155) | 131 (1,039) | |||||
Phyd | 0 (0) | 0 (0) | 0 (0) | 1 (58) | 1 (58) | 3 (173) | 50 | ||||||
Sco0 | 92 (1,245) | 1,000 | 442 (1,921) | 26 | 656 (2,147) | 1,383 | 39 (982) | 300 | 187 (4,520) | 26 | 631 (6,215) | 5,800 | |
Nemertea | |||||||||||||
Nemd | 1 (58) | 0 (0) | 0 (0) | 0 (0) | 1 (58) | 20 | 0 (0) | 250 | |||||
Crustacea | |||||||||||||
Bat0 | 0 (0) | 26 | 486 (6,929) | 410 | 387 (1,698) | 2 (289) | 70 | 37 (1,444) | 847 (12,429) | 51 | |||
Cor0 | 10,167 | 2,662 (16,949) | 513 (7,356) | 100 | 91 (678) | 11,900 | 100 (4,545) | 4,400 | 411 (11,318) | 11,140 | 95 (8,475) | 1,300 | |
Cra− | 5 (65) | 12 (113) | 11 (113) | 7 (325) | 120 | 7 (231) | 14 (452) | ||||||
Gam− | 17 (734) | 35 (1,412) | 8 (113) | 4 (289) | 50 | 12 (1,469) | 9 (1,469) | ||||||
Mollusca | |||||||||||||
Abt0 | 377 (2,773) | 230 | 21 (395) | 0 (0) | 3 (345) | 900 | 25 (1,977) | 26 | 29 (3,735) | ||||
Cer s− | 8 (116) | 102 | 8 (65) | 50 | 0 (0) | 9 (508) | 21 (844) | 38 | 6 (231) | 77 | |||
Cer ad | 8 (173) | 18 (169) | 17 (168) | 151 (2,825) | 109 (1,864) | 5 (170) | 25 | ||||||
Hyd0 | 357 (7,488) | 7,990 | 242 (5,405) | 700 | 0 (0) | 5,122 | 3,794 (245,946) | 700 | 3,328 (282,432) | 8,960 | 177 (15,135) | ||
Mac s0 | 277 (2,655) | 154 | 52 (678) | 50 | 21 (169) | 91 (3,291) | 269 (16,554) | 26 | 23 (1,525) | 104 | |||
Mac a− | 107 (791) | 59 (226) | 30 (115) | 154 | 90 (1,186) | 123 (1,412) | 25 (1,299) | 100 | |||||
Mya s− | 4 (130) | 26 | 0 (0) | 17 (404) | 8 (455) | 19 (909) | 28 | 3 (130) | |||||
Ret− | 0 (0) | 461 | 0 (0) | 0 (0) | 0 (0) | 70 | 1 (57) | 1 (57) | |||||