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Table 2 Environmental dataset for eight locations at Okinawa Island, Ryukyu Islands, Japan

From: Palythoa zoanthid 'barrens’ in Okinawa: examination of possible environmental causes

  Oku Bise Manza Toguchi Mizugama Sunabe Convention Center Makiminato
Sampling depth (m) 1 ~ 2 1 ~ 2 3 ~ 5 1 ~ 2 1 ~ 2 1 ~ 2 2 ~ 3 3 ~ 6
Temperature (°C)         
May to June 2012 (mean/min/max) - 24.9/23.2/25.7 25/23.6/25.8 - 25.3/24.3/26.4 - 25.4/24.1/26.2 25.3/24.3/25.9
temperature at the time of sampling 27 27.4 29 25.8 28.6 25.9 28.4 28.5
pH 8.26 8.4 8.21 8.25 8.21 8.22 8.23 8.1
DO (mg L-1) 5.35 6.61 4.37 5.23 4.66 6.04 4.41 3.56
Salinity‰ 30.1 31.4 30.6 31.1 29.8 31.1 31.7 32.2
POM (mg L-1)         
 Range 7.97 - 8.45 8.74 - 9.09 8.34 - 8.47 7.13 - 7.34 6.75 - 6.98 7.01 - 7.65 6.9 - 7.2 5.7 - 9.99
 Mean + SD 8.167 ± 0.03 8.4 ± 1.67 8.4 ± 0.00 7.22 ± 0.11 6.85 ± 0.00 7.36 ± 0.32 7.2 ± 0.17 7.2 ± 2.16
Chl a (μg L-1)         
 Range 0.08 - 0.12 0.04 0.02 - 0.05 0.24 - 0.28 0.03 - 0.04 0.16 - 0.17 0.04 - 0.07 0.01 - 0.52
 Mean + SD 0.1 ± 0.02 0.04 ± 0.00 0.04 ± 0.01 0.27 ± 0.02 0.03 ± 0.01 0.162 0.06 ± 0.01 0.36 ± 0.02
NO3-N (μM)         
 Range 0.26 - 0.31 0.13 - 0.16 0.23 - 0.27 4 - 4.05 1.27- 1.4 0.62 - 0.65 0.67 - 0.69 1.61 - 1.68
 Mean + SD 0.28 ± 0.02 0.14 ± 0.02 0.25 ± 0.02 4.02 ± 0.02 1.33 ± 0.06 0.64 ± 0.02 0.68 ± 0.01 1.64 ± 0.03
NO2-N (μM)         
 Range 0.04 0.03 - 0.03 0.03 0.21 - 0.22 0.12 - 0.13 0.07 0.07 0.11
 Mean + SD 0.04 ± 0.00 0.03 ± 0.00 0.03 ± 0.00 0.214 0.12 ± 0.00 0.07 0.07 ± 0.00 0.11 ± 0.00
NH4-N (μM)         
 Range 0.58 - 0.93 0.38 - 0.74 0.3 - 0.43 1.56 - 1.64 1.16 - 1.33 0.68 - 0.74 0.87 - 0.92 0.97 - 1.09
 Mean + SD 0.74 ± 0.17 0.53 ± 0.17 0.38 ± 0.06 1.6 ± 0.03 1.24 ± 0.08 0.70 ± 0.4 0.90 ± 0.02 1.02 ± 0.05
PO4-P (μM)         
 Range 0.18 - 0.19 0.15 - 0.17 0.17 - 0.18 0.17 - 0.18 0.04 - 0.07 0.13 - 0.16 0.15 - 0.18 0.03 - 0.04
 Mean + SD 0.185 0.16 ± 0.01 0.17 ± 0.01 0.18 ± 0.01 0.06 ± 0.15 0.15 ± 0.02 0.16 ± 0.01 0.04 ± 0.00