Table 2
Analysis of regression between environmental quality expressed by BMWPpl values and seven measures (indices) of macrobenthos diversity in four biocoenotic types of watercourses. Linearized regression functions and four measures of the fit accuracy are presented: mean absolute error (MAE), standardized R2, values of statistic F for regression model accuracy and residual coefficient of variation (RCV).
| Index | Type | Regression function | MAE | R2 | F value (df) | RCV |
|---|---|---|---|---|---|---|
| Shannon | I | y = 51.19(4.45) x + 8.57(7.27) | 88.29 | 0.467 | 132.5 (1, 151) | 35.31 |
| II | y = 38.03(2.82) x + 8.71(4.15) | 59.47 | 0.452 | 180.8 (1, 221) | 35.85 | |
| III | y = 45.58(2.44) x + 4.97(4.07)# | 75.01 | 0.491 | 346.8 (1, 360) | 33.38 | |
| IV | y = 44.89(4.34) x + 8.51(7.39)# | 79.41 | 0.466 | 107.2 (1, 123) | 32.39 | |
| Evenness | I | y = 127.69(29.11) x + 39.43(11.44) | 87.46 | 0.113 | 19.2 (1, 151) | 42.30 |
| II | y = 73.79(16.87) x + 33.34(6.57) | 60.47 | 0.088 | 19.1 (1, 221) | 46.45 | |
| III | y = 101.64(15.77) x + 36.09(6.53) | 76.19 | 0.103 | 41.5 (1, 360) | 44.29 | |
| IV | y = 126.09(28.05) x + 31.42(11.43) | 80.63 | 0.141 | 20.2 (1, 123) | 41.06 | |
| Margalef | I | y = 41.21(1.67)x − 7.99(4.13) | 89.51 | 0.802 | 610.6 (1, 151) | 24.45 |
| II | y = 30.17(1.30)x − 0.55(2.85)# | 58.81 | 0.711 | 538.9 (1, 221) | 26.04 | |
| III | y = 34.59(1.05)x − 7.38(2.71) | 74.16 | 0.751 | 1088.5 (1, 360) | 23.32 | |
| IV | y = 34.48(1.69)x − 4.97(4.48) | 78.53 | 0.771 | 416.3 (1, 123) | 21.16 | |
| Family richness | I | y = 5.54(0.13)x − 11.15(2.55) | 70.00 | 0.919 | 1731.0 (1, 151) | 12.72 |
| II | y = 5.09(0.10)x − 8.31(1.49) | 47.29 | 0.920 | 2522.8 (1, 221) | 13.69 | |
| III | y = 5.27(0.08)x − 9.52(1.45) | 60.27 | 0.918 | 4067.2 (1, 360) | 2.44 | |
| IV | y = 5.01(0.13)x − 8.32(2.40) | 63.22 | 0.928 | 1588.4 (1, 123) | 2.25 | |
| TPD⁎ | I | y = 0.63(0.02) x + 0.37(0.11) | 81.49 | 0.897 | 1313.5 (1, 151) | 5.16 |
| II | y = 0.59(0.01) x + 0.56(0.08) | 55.04 | 0.895 | 1864.4 (1, 221) | 5.36 | |
| III | y = 0.61(0.01) x + 0.34(0.08) | 70.32 | 0.871 | 2422.7 (1, 360) | 5.36 | |
| IV | y = 1.11(0.03) x + 1.18(0.09) | 78.23 | 0.914 | 1315.0 (1, 123) | 3.56 | |
| MPD⁎ | I | y = 1.19(0.04)x − 0.09(0.16)# | 84.28 | 0.818 | 679.7 (1, 151) | 5.65 |
| II | y = 1.09(0.03)x − 0.35(0.10) | 57.55 | 0.866 | 1419.7 (1, 221) | 5.82 | |
| III | y = 1.13(0.03)x − 0.14(0.10)# | 73.01 | 0.835 | 1817.9 (1, 360) | 6.06 | |
| IV | y = 0.52(0.02)x − 0.91(0.11) | 74.52 | 0.893 | 1027.5 (1, 123) | 3.98 | |
| MDis⁎ | I | y = 20.29(0.55) x + 6.33(2.42) | 83.82 | 0.901 | 1366.7 (1, 151) | 4.17 |
| II | y = 22.41(0.48)x − 3.07(1.51) | 57.99 | 0.907 | 2144.1 (1, 221) | 4.75 | |
| III | y = 25.50(0.48)x − 4.39(1.63) | 73.41 | 0.889 | 2887.7 (1, 360) | 2.84 | |
| IV | y = 23.99(0.69)x − 0.23(2.51) | 77.64 | 0.909 | 1225.1 (1, 123) | 2.53 | |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.