| Definition | Sampling year (1998–2019) | Sampling month (1–12) | Sampling date (1–31) | Sampling date (Year/month/date) | Sampling site (T1–T28) | Cell (or colony) density (cells·ml−1) | An asterisk indicates the taxon was counted based on the colonies | Classification at the class level | Identification at the species level or below | Indicate original taxon name in Chiba Prefecture records, if it was different from the current one |
| Measurement Domain |
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| Def | Sampling site (T1–T28) |
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| Unit | numberPerMilliliter |
| Type | real |
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| Def | An asterisk indicates the taxon was counted based on the colonies |
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| Def | Classification at the class level |
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| Def | Identification at the species level or below |
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| Def | Indicate original taxon name in Chiba Prefecture records, if it was different from the current one |
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