Open Access
Table 2
Characteristics of the assemblages sampled in the studied springs. Mean abundances (± DS, n = 16). The midpoint altitude corresponds to the altitude where 50% of the individuals were caught (calculated from a cumulative curve).
| Mean densities | Altitudinal range | |||||
|---|---|---|---|---|---|---|
|
|
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| Benthic (ind./ 0.1m2) | Vegetation (ind./ 0.1m2) | Interstitial (ind./5l) | Minimum | Midpoint (50%) | Maximum | |
| Baetis sp.4 | 71 ± 198 | 36.5 ± 72.6 | 9.4 ± 24.2 | 570 | 575 | 1550 |
| Simulidae div. sp.7 | 2.8 ± 5.9 | 15.8 ± 31.2 | 1.6 ± 4.9 | 570 | 620 | 1000 |
| Nemoura cf mortoni 5 | 12 ± 43 | 3.6 ± 9.9 | 2.9 ± 5.3 | 620 | 620 | 1070 |
| Gammarus fossarum 3 | 82 ± 128 | 52.9 ± 112.5 | 52.4 ± 94.0 | 570 | 700 | 1340 |
| Nemoura cf sinuata 5 | 23 ± 39 | 15.1 ± 22.8 | 19.3 ± 27.6 | 570 | 720 | 1550 |
| Limnephilidae div. sp.6 | 16 ± 22 | 5.9 ± 10.2 | 7.4 ± 23.7 | 570 | 940 | 1650 |
| Protonemura sp.5 | 20 ± 35.4 | 18.5 ± 35.7 | 0.8 ± 2.0 | 620 | 1020 | 1650 |
| Chironomidae div sp.7 | 127 ± 111 | 212.8 ± 254.6 | 154.1 ± 178.0 | 570 | 1100 | 1650 |
| Candona neglecta 2 | 23 ± 79.5 | 1.4 ± 2.9 | 6.1 ± 12.7 | 570 | 1155 | 1650 |
| Cavernocypris subterranea 2 | 5 ± 17.9 | 0.3 ± 0.6 | 3.4 ± 6.4 | 725 | 1340 | 1650 |
| Crenobia alpina 1 | 72 ± 115 | 31 ± 41.8 | 20.3 ± 28.6 | 725 | 1590 | 1650 |
| Mean abundances | 870.7 ± 685.4 | 627.3 ± 560.5 | 705.6 ± 622.0 | |||
| Mean taxonomic richness | 14.3 ± 3.9 | 14.2 ± 4.6 | 14.4 ± 3.7 | |||
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