Table 2 Comparison of Lotic Ecosystem Trophic Status Indices (LETSIs) and Trophic Classifications using Passive Diffusion Periphytometers in the Bosque River Watershed for all sites sampled during the indicated periods.
From: Measuring variability in trophic status in the Lake Waco/Bosque River Watershed
Date | Site | Number of Replicates | Control Chl. a (ug cm-2)* | N+P Chl. a (ug cm-2) | LETSI | Ecoregion 5 Trophic Classification# |
|---|---|---|---|---|---|---|
July 17 – 30, 1997 | NB-01 | 10 | 0.88 | 0.98 | 0.90 | O |
| Â | NB-02 | 10 | 4.58 | 5.19 | 0.88 | M |
| Â | NB-04 | 10 | 1.73 | 5.73 | 0.30 | O |
| Â | NC | 10 | 0.48 | 2.67 | 0.08 | O |
| Â | MB | 10 | 0.47 | 5.87 | 0.18 | O |
April 5 – 19, 1998 | NC | 10 | 0.71 | 1.21 | 0.59 | O |
| Â | MB | 10 | 0.56 | 0.91 | 0.61 | O |
May 11 – 26, 1998 | NB-01 | 8 | 0.40 | 0.37 | >1.0 | O |
| Â | NB-02 | 9 | 9.02 | 8.07 | >1.0 | E |
| Â | NB-04 | 9 | 2.50 | 4.41 | 0.57 | M |
| Â | NB-05 | 9 | 2.69 | 6.13 | 0.44 | M |
| Â | HC | 7 | 1.46 | 1.16 | >1.0 | O |
| Â | MB | 8 | 0.83 | 6.35 | 0.13 | O |
July 30 – August 13, 1998 | NB-04 | 8 | 0.49 | 4.55 | 0.11 | O |
| Â | NB-05 | 9 | 0.99 | 2.15 | 0.46 | O |
October 10 – 24, 1998 | NB-01 | 7 | 0.80 | 0.73 | 1.10 | O |
| Â | NB-02 | 6 | 1.94 | 1.50 | 1.30 | O |
| Â | NB-03 | 7 | 0.61 | 1.56 | 0.39 | O |