Table 1 Indicators for grading the intensity of tourism disturbances
From: Tourism disturbance gradient effects on soil fungal communities in southern China’s karst grassland
Type of disturbance intensity | Distance range (from tourist routes) | Level of human activity | Vegetation coverage | Temperature |
|---|---|---|---|---|
ND | No visitor areas | No tourist activity, grassland left in its natural state | >90% | 16–22° |
LD | 60–100m | No visible signs of human activity, low number of tourists | 60–90% | 16–22° |
MD | 30–60m | Small amount of litter and signs of trampling, heavy foot traffic | 30–60% | 16–22° |
SD | 0–30m | Significant human activity, high levels of litter and trampling, high concentration of visitors | <30% | 16–22° |
