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Photic stress on coral reefs in the Maldives: The Amphistegina bleaching index

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Academic year: 2021

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Supplementary Table 1. 2018 Rubble area data for the three Maldivian Islands. c = community

island, u = uninhabited island and r = resort island, SA = surface area.

Island Site Subsample Sample Name SA of Rubble 1 (cm2) SA of Rubble 2 (cm2) SA of Rubble 3 (cm2) Total SA (cm2)

Ra sd hoo (c) 1 a R1.1 26.9 21.5 30.0 78.4 b R1.2 23.3 37.6 33.5 94.4 c R1.3 26.3 35.4 28.1 89.8 2 a R2.1 26.0 17.9 N/A 43.9 b R2.2 35.7 25.7 N/A 61.4 c R2.3 29.5 25.7 N/A 55.2 V ih am aa far u (u) 1 a V1.1 17.9 25.8 N/A 43.7 b V1.2 23.6 22.0 N/A 45.6 c V1.3 22.3 19.6 N/A 41.9 2 a V2.1 22.3 17.6 N/A 39.9 b V2.2 22.7 28.0 N/A 50.7 c V2.3 31.7 17.2 N/A 48.9 Ma aya fus hi (r) 1 a M1.1 17.9 12.3 N/A 30.2 b M1.2 9.6 14.9 N/A 24.6 c M1.3 17.6 25.3 N/A 43.0 2 a M2.1 16.9 28.9 N/A 45.8 b M2.2 17.8 15.0 N/A 32.8 c M2.3 13.0 20.6 N/A 33.7

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Supplementary Table 2. 2018 Amphistegina data. c = community island, u = uninhabited island

and r = resort island, specs = specimens, PB = partially bleached, B = bleached, SA = surface

area.

Island Site Subsample Total Living Normal Specs Specs PB Specs B SA (cmRubble 2) (ind/100 cmLiving 2) PB % % B with B % Specs.

Ra sd hoo (c) 1 a 70 40 24 6 78.4 89 34.3 8.6 42.9 b 161 114 39 8 94.4 171 24.2 5.0 29.2 c 173 92 72 9 89.8 193 41.6 5.2 46.8 2 a 108 69 34 5 43.9 246 31.5 4.6 36.1 b 201 135 51 15 61.4 328 25.4 7.5 32.8 c 114 55 41 18 55.2 206 36.0 15.8 51.8 V ih am aa far u (u) 1 a 95 66 19 10 43.7 218 20.0 10.5 30.5 b 161 102 26 33 45.6 353 16.1 20.5 36.6 c 58 38 12 8 41.9 139 20.7 13.8 34.5 2 a 49 37 12 0 39.9 123 24.5 0.0 24.5 b 123 81 34 8 50.7 243 27.6 6.5 34.1 c 110 72 31 7 48.9 225 28.2 6.4 34.5 Ma aya fus hi (r) 1 a 65 46 16 3 30.2 215 24.6 4.6 29.2 b 24 18 2 4 24.6 98 8.3 16.7 25.0 c 27 15 5 7 43.0 63 18.5 25.9 44.4 2 a 124 94 17 13 45.8 270 13.7 10.5 24.2 b 34 22 7 5 32.8 104 20.6 14.7 35.3 c 27 14 10 3 33.7 82 37.0 11.1 48.1

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Supplementary Table 3. In situ sea temperature and photosynthetic active radiation (PAR)

measurements obtained during the 2018 sampling campaign for the both the surface (0 m) and

at 10 m water depth. c = community island, u = uninhabited island, r = resort island, k = PAR

extinction coefficient.

Island Site Date Time Temperature at 0 m (°C) Temperature at 10 m (°C) PAR at 0 m (µmol m-2 s-1) (µmol mPAR at 10 m -2 s-1) k

Ra sd hoo (c) 1 02.09.2018 1221 30.5 29.8 1633.2 632.3 0.095 2 03.09.2018 0845 30.3 30.3 1046.3 496.5 0.075 V ih am aa far u (u) 1 04.09.2018 1025 30.5 29.8 1406.5 616.8 0.082 2 05.09.2018 ~0900 30.1 30.1 1087.7 492.7 0.079 Ma aya fus hi (r) 1 06.09.2018 1100 30.3 30.0 1848.6 700.6 0.097

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