TABLE 1.
Microbial mats and sediment samples studied
| Sample | Sampling site (prefecture) | Date of sampling | Water temp (°C) | pH | Color | Appearance |
|---|---|---|---|---|---|---|
| GANI | Ganiba spa (Akita) | 16 May 1995 | 50 | 8.0 | White | Sulfur-turf mat |
| YUM-1 | Yumata spa (Nagano) | 8 August 1996 | 73 | 6.5 | Black | Sulfur-turf-like mat |
| YUM-2 | Yumata spa (Nagano) | 8 August 1996 | 68 | 5.9 | White | Sulfur-turf mat |
| YUM-3 | Yumata spa (Nagano) | 8 August 1996 | 65 | 6.2 | Yellow | Chloroflexus-mixed mat |
| YUM-4 | Yumata spa (Nagano) | 8 August 1996 | 50 | 6.4 | Green | Cyanobacterial mat |
| NAK-1 | Nakanoyu spa (Nagano) | 25 May 1996 | 75 | 6.6 | White-yellow | Sulfur-turf mat |
| NAK-2 | Nakanoyu spa (Nagano) | 25 May 1996 | 61 | 6.5 | Orange-green | Chloroflexus-mixed mat |
| NAK-3 | Nakanoyu spa (Nagano) | 25 May 1996 | 53 | 5.7 | Green | Cyanobacterial mat |
| NAK-4 | Nakanoyu spa (Nagano) | 25 May 1996 | 52 | 5.8 | Green | Cyanobacterial mat |
| NIK-1 | Nikko-Yumoto spa (Tochigi) | 10 October 1995 | 56 | 7.5 | Green | Cyanobacterial mat |
| NIK-2 | Nikko-Yumoto spa (Tochigi) | 10 October 1995 | 45 | 7.4 | Green | Cyanobacterial mat |
| NIK-3 | Nikko-Yumoto spa (Tochigi) | 10 October 1995 | 34 | 6.8 | Red | Purple photosynthetic mat |
| YUF | Yuhin hot spring (Oita) | 3 May 1996 | 78 | 8.0 | Hot spring sediment | |
| SEW | Toyohashi (Aichi) | 9 June 1996 | 22 | 7.0 | Gray | Sewage ditch mat |