From: Physiological responses of Daphnia pulex to acid stress
Physiological Variable | pH 7.8 acclimation | pH 6.0 acclimation | pH 5.5 acclimation | Significant difference among acclimation groups |
---|---|---|---|---|
pH | 8.334 ± 0.006†| 8.177 ± 0.025 | 8.104 ± 0.008# | *** |
(kPa) | 0.56 ± 0.02 | 0.56 ± 0.02 | 0.33 ± 0.04# | *** |
(mM) | 20.9 ± 0.7 | 14.6 ± 0.5# | 7.2 ± 0.9# | *** |
(mM) | 0.153 ± 0.005 | 0.074 ± 0.003 | 0.031 ± 0.007 | *** |
βA (meq L-1 pH-1) | 2.0 | 5.1 | 2.2 | not tested |
βB (meq L-1 pH-1) | 48.1 | 33.5 | 16.6 | not tested |
βC (meq L-1 pH-1) | 0.70 | 0.34 | 0.14 | not tested |
βT (meq L-1 pH-1) | 51.5 | 39.4 | 19.1 | not tested |
fH (min-1) | 205 ± 10†| 246 ± 18 | 299 ± 12# | ** |
fA (min-1) | 374 ± 32†| 427 ± 58 | 500 ± 6# | * |
(nmol h-1 mm-3) | 1.53 ± 0.09 | 1.95 ± 0.07†# | 1.41 ± 0.14†| ** |