Open Access
Table 1
Number of populations for Galba truncatula and Omphiscola glabra in 2013–2014 and 2020–2021 in the farms investigated in the department of Haute Vienne on acid soils.
| Habitat type | Number of populations and decline rate (%) between the two periods | |||||
|---|---|---|---|---|---|---|
|
|
||||||
| Galba truncatula | Omphiscola glabra | |||||
| 2013–14 | 2020–21 | Decline | 2013–14 | 2020–21 | Decline | |
| Drainage swales | 413 | 256 | 38.1 | 233 | 177 | 24.1 |
| Hillside sources | 178 | 133 | 25.3 | 142 | 121 | 14.8 |
| Drainage ditches | 47 | 26 | 44.7 | 32 | 23 | 28.2 |
| Trampled areas | 11 | 4 | 63.7 | 3 | 0 | 100 |
| Road ditches | 152 | 110 | 27.7 | 114 | 98 | 14.1 |
| Pond banks | 5 | 0 | 100 | 9 | 4 | 55.6 |
| Stream banks | 7 | 2 | 71.5 | 17 | 6 | 64.8 |
| All types | 813 | 531 | 34.7 | 550 | 429 | 22.0 |
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