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Table 2 Overview of selected localities and sample properties in the refined dataset. Column legend: 1, locality station code; 2, geographic coordinates; 3, minimum–maximum depth (in m); 4, date; 5, habitat type (S, soft bottom; H, hard bottom; G, shell gravel); 6, sample equipment (with haul length in m), see Table 1 for specifications of individual sample volume; 7, sample effort as overall haul volume per location (in m3); 8, species richness (no. of species); 9, relative species richness (no. of species/100 m3 haul volume); 10, distance between localities (in m)

From: Marine long-term biodiversity assessment suggests loss of rare species in the Skagerrak and Kattegat region

Historical inventory   Recent inventory
1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9
JS342 56.9143 11.9063 26–26 7/13/32 S Agas-100 (160), Ring-58 (160) 122.4 147 120.1 538 KA26 56.9104 11.9112 25–28 5/23/07 S Rock-80 (240) 38.4 16 41.7
JS409 56.6150 12.4594 26–26 7/15/32 S Agas-100 (160), Ring-58 (160) 122.4 72 58.8 1655 KA40 56.6016 12.4715 26–28 5/24/07 S Rock-80 (200), Ring-70 (82) 63.6 8 12.6
JS421 56.3658 12.1937 30–30 6/30/33 S Agas-100 (160), Ring-100 (160), Tri-60 (2 × 160) 256.2 117 45.7 134 KA48 56.3644 12.1919 32–33 5/25/07 S Rock-80 (330), War-60 (280) 78 31 39.7
JS419 56.4670 12.4604 27–27 6/21/33 S, G Agas-100 (160), Ring-100 (160), Ring-58 (160) 248.8 76 30.5 0 KA53 56.4670 12.4604 28–29 5/29/07 S Rock-80 (130), War-60 (260) 44.2 21 47.5
JS416 56.5491 12.6056 23–23 7/16/32 S, G Rect-75 (2 × 160), Ring-58 (2 × 160) 132.8 77 58.0 510 KA54 56.5501 12.5985 22–23 5/29/07 S Rock-80 (280), War-60 (425) 83.05 32 38.5
JS415 56.5438 12.6830 20–20 6/16/33 S, G Agas-100 (160), Tri-60 (160) 104.9 67 63.9 180 KA55 56.5423 12.6838 20–21 5/29/07 S Rock-80 (280) 44.8 22 49.1
JS411 56.6249 12.6523 19–19 6/15/33 S Agas-100 (160), Ring-58 (160), Rect-75 (2 × 160) 146.4 92 62.8 149 KA57 56.6245 12.6501 19–22 5/30/07 S Rock-80 (280, 390) 107.2 20 18.7
JS410 56.5235 12.3143 30–30 6/22/33 S Tri-60 (3 × 160) 74.7 79 105.8 570 KA58 56.5200 12.3204 31–34 5/30/07 S Rock-80 (280) 44.8 25 55.8
JS298 57.2918 12.0118 27–27 6/26/29 S Agas-100 (160) 80 59 73.8 1919 KA67 57.2790 12.0327 26–29 5/31/07 S War-60 (445) 40.05 20 49.9
JS296 57.3027 11.9320 42–42 7/08/32 H Tri-60 (2 × 160), Ring-58 (4 × 160) 219.4 117 53.3 98 KA68 57.3022 11.9330 21–49 5/31/07 S, H Rock-80 (225), War-60 (260) 59.4 27 45.5
JS297 57.2954 11.9170 31–31 6/15/28 S Tri-60 (160) 24.9 44 176.7 2713 KA69 57.3103 11.8830 29–45 5/31/07 S Agas-80 (240) 96 32 33.3
JS299 57.2846 11.8347 55–55 5/24/29 S Tri-60 (3 × 160) 74.7 61 81.7 467 KA70 57.2874 11.8402 39–57 5/31/07 S, H Rock-80 (465) 74.4 16 21.5
JS258 57.3154 11.7517 63–67 5/30/29 S, H Tri-60 (2 × 160) 49.8 39 78.3 313 KA71 57.3153 11.7470 63–75 5/31/07 S Rock-80 (350) 56 8 14.3
JS245 57.4593 11.8090 26–26 5/30/29 S, H Tri-60 (160) 24.9 47 188.8 124 KA72 57.4587 11.8074 25–39 5/31/07 S, H Rock-80 (220) 35.2 31 88.1
JS243 57.5356 11.6803 37–37 7/21/22 S Tri-60 (160) 24.9 39 156.6 524 KA73 57.5349 11.6718 33–39 5/31/07 S War-60 (315) 28.35 15 52.9
JS165 57.7725 11.5143 30–35 8/11/21 H Tri-60 (150) 23.4 30 128.2 302 KA76 57.7726 11.5193 28–39 6/01/07 H Rock-80 (240) 38.4 22 57.3
JS162 57.8020 11.5643 18–21 8/11/21 S, G Rect-75 (370), Tri-60 (370) 113.1 47 41.6 321 KA77 57.7995 11.5667 18–23 6/01/07 S Rock-80 (500) 80 13 16.3
JS158 58.1806 11.2154 52–52 3/07/33 S Tri-60 (160) 24.9 8 32.1 3370 SK66 58.2042 11.1816 63–64 8/20/07 S Ring-70 (240) 92.4 6 6.5
JS159 58.1357 11.2529 50–50 3/07/33 S, H Tri-60 (160) 24.9 35 140.6 309 SK67 58.1345 11.2574 46–51 8/20/07 S, H Agas-80 (365) 146 19 13.0
JS156 58.5700 10.9817 60–60 3/07/33   Rect-75 (160) 24 27 112.5 424 SK71 58.5670 10.9853 36–61 8/21/07 S, H Rock-80 (330, 350), Ring-70 (205) 187.72 40 21.3
JS155 58.5864 11.1914 48–48 7/03/35 S Agas-100 (2 × 160), Tri-60 (3 × 160) 234.7 51 21.7 252 SK73 58.5887 11.1911 27–52 8/21/07 S Rock-80 (350) 56 8 14.3
JS122 58.6945 10.8377 50–85 7/11/34 S, H Rect-75 (2 × 120) 36 35 97.2 208 SK75 58.6934 10.8401 42–75 8/22/07 H Rock-80 (2 × 240) 76.8 34 44.3
JS142 58.6949 11.0412 150–195 6/22/35 S, H Rect-75 (4 × 125), Tri-60 (4 × 125) 152.9 58 37.9 388 SK81 58.6929 11.0368 45–203 8/22/07 S, H Rock-80 (540, 480) 163.2 16 9.8
JS104 58.7881 11.0307 37–43 6/20/35 S, H Tri-60 (3 × 165), Agas-75 (2 × 165) 176.13 16 9.1 702 SK84 58.7883 11.0427 24–45 8/23/07 H Rock-80 (85, 205) 46.4 26 56.0
JS69 58.8864 10.7962 50–69 8/02/26 S, H Tri-60 (2 × 150) 46.74 39 83.4 1588 SK86 58.8812 10.8194 54–69 8/23/07 S, H Rock-80 (135) 21.6 28 129.6
JS55 58.9098 10.9307 26–37 7/19/34 S, H Tri-60 (3 × 100) 46.74 44 94.1 6126 SK89 58.9453 11.0123 12–52 8/23/07 S, H Rock-80 (280) 44.8 31 69.2
JS44 58.9264 10.9450 30–45 7/13/34 S, H Tri-60 (2 × 150) 70.11 102 145.5 95 SK90 58.9270 10.9459 23–36 8/23/07 S Rock-80 (100) 16 19 118.8
JS46 58.9207 10.9551 36–36 7/13/34 S, H Tri-60 (160) 24.9 78 313.3 43 SK91 58.9210 10.9549 28–37 8/23/07 S Rock-80 (180) 28.8 15 52.1
JS41 58.9309 10.9865 25–35 7/21/25 S Agas-100 (160), Tri-60 (160) 104.9 48 45.8 154 SK92 58.9310 10.9837 18–34 8/23/07 H Rock-80 (350) 56 24 42.9
JS38 58.9481 11.0194 30–50 7/20/25 S Tri-60 (160) 24.9 99 397.6 332 SK93 58.9478 11.0138 31–58 8/24/07 S, H Rock-80 (260, 280) 86.4 21 24.3
JS53 58.9126 11.0365 50–80 7/29/27 S Agas-100 (4 × 160) 320 99 30.9 4192 SK94 58.9512 11.0188 13–47 8/24/07 S Rock-80 (280) 44.8 18 40.2
JS33 58.9554 11.0219 30–80 7/14/34 S Agas-100 (160), Tri-60 (2 × 240) 154.78 111 71.7 169 SK95 58.9565 11.0200 26–79 8/24/07 S Rock-80 (295) 47.2 24 50.8
JS31 58.9583 11.0219 20–50 7/30/26 S, H Rect-75 (4 × 160) 96 114 118.8 431 SK96 58.9615 11.0266 14–49 8/24/07 S Rock-80 (260) 41.6 25 60.1
JS32 58.9605 11.0540 200–200 7/22/25 S Agas-100 (3 × 160) 240 38 15.8 257 SK97 58.9585 11.0523 215–226 8/24/07 S Agas-80 (700) 280 17 6.1
JS30 58.9605 11.0717 40–60 8/07/26 S, H Rect-75 (2 × 160) 48 69 143.8 97 SK99 58.9598 11.0725 25–60 8/24/07 S, H Rock-80 (225) 36 22 61.1
JS25 58.9864 11.0857 93–93 7/10/34 S, H Agas-100 (160), Ring-58 (160), Tri-60 (160) 147.3 67 45.5 197 SK100 58.9860 11.0825 77–125 8/24/07 S, H Rock-80 (130, 260) 62.4 21 33.7
JS23 58.9972 11.1094 30–100 7/29/25 S, H Agas-100 (200) 100 46 46.0 162 SK101 58.9984 11.1109 18–106 8/24/07 S Rock-80 (130) 20.8 13 62.5
JS26 58.9806 11.0830 100–100 8/19/27 S Agas-100 (160) 80 14 17.5 1126 SK102 58.9714 11.0750 11–74 8/24/07 S Rock-80 (110, 205) 50.4 40 79.4
JS43 58.9231 10.9834 15–30 8/01/27 S, H Agas-100 (400), Tri-60 (400), Rect-75 (400) 322.3 143 44.4 470 SK103 58.9265 10.9882 16–30 8/24/07 S, H Rock-80 (350) 56 23 41.1
JS48 58.9210 10.9907 25–25 6/28/34 S Agas-100 (160), Ring-58 (160) 122.4 108 88.2 58 SK104 58.9215 10.9910 19–25 8/27/07 S, H Rock-80 (295) 47.2 22 46.6
JS47 58.9323 10.9821 26–26 6/29/34 S Ring-58 (160) 42.4 41 96.7 1184 SK105 58.9217 10.9836 19–32 8/27/07 S, H Rock-80 (315, 295) 97.6 18 18.4
JS66 58.8712 10.9603 25–30 08/06/27 S, H Agas-100 (100), Tri-60 (3 × 100) 96.74 127 131.3 70 SK106 58.8706 10.9599 14–34 8/27/07 S, H Rock-80 (2 × 225, 240) 110.4 30 27.2
JS129 58.6613 10.7273 90–90 7/11/34 S Agas-100 (160), Ring-58 (160), Tri-60 (2 × 160) 172.2 32 18.6 1630 SK109 58.6567 10.7011 89–97 8/28/07 S Rock-80 (225, 280) 80.8 7 8.7
JS128 58.6736 10.6542 100–100 7/05/34 S, H Tri-60 (160) 24.9 11 44.2 158 SK110 58.6725 10.6530 100–104 8/28/07 S Rock-80 (2 × 240) 76.8 7 9.1
JS130 58.6278 10.6833 126–133 7/10/35 S, H Ring-58 (160), Tri-60 (160) 67.3 29 43.1 22 SK111 58.6277 10.6833 101–133 8/28/07 S, H Rock-80 (2 × 205) 65.6 37 56.4
JS157 58.3258 11.1674 55–55 3/07/33 S Tri-60 (160) 24.9 11 44.2 137 SK132 58.3260 11.1651 40–60 8/31/07 S, H Rock-80 (365, 260) 100 27 27.0
JS160 58.1095 11.1815 76–76 3/06/33 S, H Tri-60 (160), Rect-75 (160) 48.9 34 69.5 585 SK137 58.1075 11.1728 80–86 6/09/08 S, H War-60 (340) 30.6 16 52.3
JS140 58.7132 11.0225 68–68 7/17/35 S, H Tri-60 (2 × 160) 49.8 44 88.4 494 SK175 58.7096 11.0273 43–73 6/15/08 H Agas-80 (390), Rock-40 (395) 187.6 15 8.0
JS148 58.6809 11.1160 47–47 6/19/35 H Tri-60 (4 × 160) 99.6 31 31.1 17 SK177 58.6809 11.1157 36–54 6/16/08 S, H Rock-80 (255, 220, 330) 322 22 6.8
JS244 57.5317 11.6731 6–15 9/02/22 H Tri-60 (160) 24.9 12 48.2 232 KA122 57.5327 11.6764 16–24 8/21/09 G Rock-40 (315) 25.2 7 27.8
JS311 57.1175 11.7045 27–27 8/07/30 H Tri-60 (160) 24.9 93 373.5 787 FL23 57.1237 11.6987 22–24 6/17/05 H, G Rock-80 (280) 112 22 19.6
JS360 56.8701 12.2223 19–19 7/15/31 H Agas-100 (160), Rect-75 (3 × 160) 152 53 34.9 120 MB20 56.8708 12.2207 19–19 9/08/05 H, G Rock-80 (280) 112 8 7.1
JS361 56.8652 12.2244 27–27 7/16/31 S, H Agas-100 (2 × 160), Rect-75 (2 × 160) 208 65 31.3 254 MB18 56.8637 12.2213 25–28 9/08/05 S Ring-70 (280) 107.8 29 26.9
JS362 56.8498 12.1901 54–54 7/18/31 S Agas-100 (160), Ring-58 (160) 122.4 40 32.7 111 MB15 56.8502 12.1885 45–55 9/07/05 S War-60 (650) 58.5 14 23.9