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Effects of Air Pollutants on Cold-Desert Cyanobacterial-Lichen Crusts and Rock Lichens: Chlorophyll Degradation, Electrolyte Leakage and Nitrogenase Activity

Citation

Jayne Belnap, Effects of Air Pollutants on Cold-Desert Cyanobacterial-Lichen Crusts and Rock Lichens: Chlorophyll Degradation, Electrolyte Leakage and Nitrogenase Activity: .

Summary

Exposure of cold-desert cyanobacteral-lichen crusts on three different substrates (sandstone, limestone and gypsum) to different pollution sources showed that while urban pollutants in the Los Angeles basin, especially particulates, significantly degraded chlorophyll on all three substrates, simulated acid rain (pH 3.5, 4.5, 5.5 and 6.5; 1:1 sulfuric and nitric acid) had an opposite, fertilizing effect on sandstone and limestone crusts. Studies around a coal-fired power plant, comparing sites 9 and 12 k, away from the plant with a control site 42 km away, showed the same fertilizing effect on surrounding sandstone crusts. However, less pH-buffered rock lichens had significantly increased electrolyte leakage and chlorophyll degradation [...]

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Author :
Jayne Belnap

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Communities

  • Upper Colorado River Basin

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From Source - Mendeley RIS export <br> On - Tue May 10 10:29:06 CDT 2011

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Title Citation Effects of Air Pollutants on Cold-Desert Cyanobacterial-Lichen Crusts and Rock Lichens: Chlorophyll Degradation, Electrolyte Leakage and Nitrogenase Activity

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