Red spruce canopy response to acid fog exposure
Jagels R, Jiang M, Marden S, Carlisle J. 2002. Red spruce canopy response to acid fog exposure. Elsevier Science Atmospheric Research. 64:169-178
'The health of red spruce is adversly affected by exposure to acid fog. Epicuticular wax structure over epistomatal chambers, mesophyll membrane calcium and changes in redox state of glutathione are affected in both chamber and field studies and are correlated with leaf exposure to acid fog, but not with soil or total leaf calcium concentrations. Experimetns tracking fog depostion under conditions of illumination or darkness, with or without a metabolic inhibitor, support the mechanism of diffusiophoresis linked with photosynthetic gas exchange. Based on deposition pattern and leaf morphology, a stomatal pathway for water and hydrogen ion penetration to leaf interior is proposed. Ecophysiological parameters are discussed in relation to differential sensitivites of red spruce and white pine to ozone and acid fog.' /STUDY LOCATIONS:/ /ISLE AU HAUT/
- Type
- Journal Article
- Authors
- Jagels, Richard; Jiang, Mei; Marden, Susan; Carlisle, Johnathan
- Units
- ACAD
- Keywords
- acid fog, Forest, Isle Au Haut, Population Decline