TABLE 3.
Density estimates and number of enriched specimens of investigated taxa within the enriched sections of the five sampling reaches.
| Taxon | Site code | Enriched section (m) | Number of individuals m−1, Mean (min–max) | Total number of enriched individuals, Mean (min–max) |
|---|---|---|---|---|
| Gammarus pulex (Linnaeus, 1758) | BY22 | 2000 | 5.79 (1.8–15.5) | 11,580 (3600–31,000) |
| RB21 | 750 | 2.41 (1.7–5.5) | 1205 (850–2750) | |
| RB22 | 1000 | 5.44 (0–16.3) | 10,880 (0–32,600) | |
| RBA3 | 2000 | 90.21 (32.6–136) | 180,420 (65,200–272,000) | |
| SB21 | 2000 | 25.74 (10.2–38.7) | 51,480 (20,400–77,400) | |
| Ephemera danica Muller, 1764 | BY22 | 2000 | 1.35 (0–4) | 2025 (0–6000) |
| RB21 | 1500 | 1.13 (0–3.4) | 565 (0–1700) | |
| RB22 | 1000 | 184.72 (35–298.7) | 277,080 (52,500–448,050) | |
| RBA3 | 2000 | 362.83 (59.5–896) | 272,122.5 (44,625–672,000) | |
| SB21 | 2000 | 325.44 (98–700) | 325,440 (98,000–700,000) | |
| Baetis sp. Leach, 1815 | BY22 | 2000 | 14 (0–28) | 2800 (0–5600) |
| RB22 | 200 | 184.72 (35–298.7) | 184,720 (35,000–298,700) | |
| RBA3 | 2000 | 362.83 (59.5–896) | 362,830 (595,00–896,000) | |
| SB21 | 2000 | 325.44 (98–700) | 244,080 (73,500–525,000) | |
| Sialis sp. Latreille, 1802 | BY22 | 500 | 21.43 (9.3–34) | 2143 (930–3400) |
| RB22 | 750 | 21 (0–63) | 15,750 (0–47,250) | |
| RBA3 | 2000 | 2.46 (0.9–4.7) | 4920 (1800–9400) | |
| SB21 | 1000 | 2.41 (0–5.5) | 3615 (0–8250) | |
| Nemoura sp. Latreille, 1796 | SB21 | 2000 | 4.21 (1.9–6) | 8420 (3800–12,000) |
| Polycentropus irroratus Curtis, 1835 | SB21 | 2000 | 17.08 (6.9–28.3) | 34,160 (13800–56,600) |
| Chaetopteryx villosa (Fabricius, 1798) | BY22 | 500 | 54.5 (0–163.5) | 109,000 (0–327,000) |
| RBA3 | 1500 | 2.98 (0.9–5.1) | 5960 (1800–10,200) | |
| Halesus radiatus (Curtis, 1834) | RB21 | 1000 | 7.89 (0–17.3) | 15,780 (0–34,600) |
| RB22 | 750 | 8.15 (0–19.2) | 16,300 (0–38,400) | |
| Limnephilus lunatus Curtis, 1834 | BY22 | 2000 | 348.8 (259.2–403.2) | 697,600 (518,400–806,400) |
| RBA3 | 2000 | 234.07 (63.4–518.4) | 468,140 (126,800–1,036,800) | |
| Potamophylax cingulatus (Stephens, 1837) | SB21 | 1500 | 55.2 (5.8–148.9) | 110,400 (11,600–297,800) |
| Potamophylax rotundipennis (Brauer, 1857) | BY22 | 1500 | 4.14 (0–12.4) | 6210 (0–18,600) |
| RB22 | 100 | 23.25 (5.8–57.6) | 23,250 (5800–57,600) |