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Horizontal scales of variation considered in the primary literature.
| Horizontal distance between neighboring samples (m) | |||||
|---|---|---|---|---|---|
| ≤ 0.1 | 0.1–1 | 1–10 | 10–100 | 100–250 | |
| Percentage of references | 29 | 21 | 29 | 67 | 13 |
We categorized the horizontal distance between neighboring samples in the references listed in Table S1 in 5 bins. The total is more than 100% because many references (38%) have multi-scale sampling schemes.
