Table 3.
Habitat-specific mean Fv/Fm values before and after the start of the drying experiment for specimens selected for darkness and light treatment (200 μmol m−2 s−1)
| Fv/FmBefore start of experiment | Fv/FmAfter drying and 48 h recovery | Fv/FmPercentage of start values | ||||
|---|---|---|---|---|---|---|
| Darkness | Light | Darkness | Light | Darkness | Light | |
| Lobaria pulmonaria | ||||||
| Xeric open | 0.684 ± 0.010a | 0.680 ± 0.015a | 0.724 ± 0.007a | 0.528 ± 0.056a | 106.2 ± 1.2b | 77.5 ± 8.1b |
| Mesic open | 0.702 ± 0.011a | 0.700 ± 0.012a | 0.725 ± 0.004a | 0.533 ± 0.054a | 103.7 ± 1.5b | 77.2 ± 8.0b |
| Mesic closed | 0.736 ± 0.002b | 0.733 ± 0.003b | 0.733 ± 0.003a | 0.431 ± 0.045a | 99.6 ± 0.3a | 58.8 ± 6.1a |
| Platismatia glauca | ||||||
| Xeric open | 0.691 ± 0.013b | 0.686 ± 0.019a | 0.721 ± 0.012b | 0.538 ± 0.040b | 104.5 ± 1.1a | 79.3 ± 5.6b |
| Mesic closed | 0.612 ± 0.020a | 0.651 ± 0.017a | 0.655 ± 0.018a | 0.270 ± 0.053a | 108.0 ± 2.6a | 40.3 ± 7.7a |
| Lobaria hallii | ||||||
| Xeric open | 0.524 ± 0.007ab | 0.520 ± 0.009a | 0.488 ± 0.010a | 0.438 ± 0.011a | 93.2 ± 1.4a | 84.2 ± 1.1a |
| Mesic open | 0.510 ± 0.006a | 0.491 ± 0.009a | 0.474 ± 0.008a | 0.422 ± 0.008a | 92.9 ± 1.0a | 86.2 ± 1.8a |
| Mesic closed | 0.543 ± 0.008b | 0.546 ± 0.009b | 0.503 ± 0.010a | 0.457 ± 0.014a | 93.0 ± 1.0a | 83.6 ± 1.7a |
| Lobaria retigera | ||||||
| Mesic closed | 0.518 ± 0.006 | 0.520 ± 0.005 | 0.494 ± 0.007 | 0.429 ± 0.010 | 95.4 ± 1.3 | 82.5 ± 2.0 |
| Lobaria scrobiculata | ||||||
| Xeric open | 0.521 ± 0.012a | 0.530 ± 0.010a | 0.547 ± 0.007a | 0.521 ± 0.013a | 105.7 ± 1.9b | 98.7 ± 2.6a |
| Mesic open | 0.542 ± 0.007a | 0.551 ± 0.006a | 0.549 ± 0.008a | 0.506 ± 0.014a | 101.4 ± 1.2ab | 91.8 ± 2.2a |
| Mesic closed | 0.548 ± 0.007a | 0.527 ± 0.010a | 0.548 ± 0.007a | 0.492 ± 0.014a | 100.0 ± 0.7a | 93.6 ± 2.4a |
| Pseudocyphellaria anomala | ||||||
| Xeric open | 0.594 ± 0.007a | 0.586 ± 0.013a | 0.580 ± 0.005a | 0.538 ± 0.021a | 97.8 ± 0.9a | 91.0 ± 2.5a |
| Mesic closed | 0.581 ± 0.005a | 0.577 ± 0.004a | 0.572 ± 0.006a | 0.500 ± 0.014a | 98.5 ± 0.9a | 86.7 ± 2.4a |
Values are mean ± 1SE; n = 19–20.
Means combined measurements from all four relative humidity levels during the 7-d experiment. Within each species sampled at more than one site, an ANOVA was run to test whether the sampled sites differed significantly from each other (P < 0.05). Within each species, sites sharing the same letter for a given variable were not statistically different from each other (all pairwise multiple comparison procedures: Holm–Sidak method).