Table 7 Student-Newman-Keuls' (SNK) Test and Waller-Duncan K-Ratio (WD) T Test Comparison of Chlorophyll a concentrations for Control treatments using Passive Diffusion Periphytometers in the Bosque River Watershed for all sites sampled during the indicated periods. SNK and WD Groups represent values from discrete populations, when compared across all dates.
From: Measuring variability in trophic status in the Lake Waco/Bosque River Watershed
| Date | Site | Number of Replicates | Mean Chl. a (ug cm-2) | Std Dev. (ug cm-2) | SNK Group (α = 0.05) | WD Group (α = 0.05) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| July 17 – 30, 1997 | NB-01 | 10 | 0.88 | 0.60 | C | E | F | ||||||
| NB-02 | 10 | 4.58 | 0.86 | B | B | ||||||||
| NB-04 | 10 | 1.73 | 0.37 | C | C | D | E | F | |||||
| NC | 10 | 0.48 | 0.14 | C | C | F | |||||||
| MB | 10 | 0.47 | 0.20 | C | C | D | F | ||||||
| April 5 – 19, 1998 | NC | 10 | 0.71 | 0.26 | C | E | F | ||||||
| MB | 10 | 0.56 | 0.27 | C | E | F | |||||||
| May 11 – 26, 1998 | NB-01 | 8 | 0.40 | 0.16 | C | E | F | ||||||
| NB-02 | 9 | 9.02 | 6.95 | A | A | ||||||||
| NB-04 | 9 | 2.50 | 0.70 | C | D | E | |||||||
| NB-05 | 9 | 2.69 | 0.80 | C | E | ||||||||
| HC | 7 | 1.46 | 0.48 | C | C | D | E | F | |||||
| MB | 8 | 0.83 | 0.13 | C | E | F | |||||||
| July 30 – August 13, 1998 | NB-04 | 8 | 0.49 | 0.24 | C | E | F | ||||||
| NB-05 | 9 | 0.99 | 0.26 | C | E | F | |||||||
| October 10 – 24, 1998 | NB-01 | 7 | 0.80 | 0.34 | C | E | F | ||||||
| NB-02 | 6 | 1.94 | 1.19 | C | C | D | E | ||||||
| NB-03 | 7 | 0.61 | 0.18 | C | E | F | |||||||