Thermal Sensitivity in Lichens

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Science  25 Aug 1978:
Vol. 201, Issue 4357, pp. 739-741
DOI: 10.1126/science.201.4357.739


Lichens are believed to be extremely resistant to high-temperature stress when desiccated. Results from a reexamination of this concept indicate that some air-dry lichen thalli can be extremely sensitive to even moderate levels of heat stress whereas others exhibit a considerable degree of heat resistance. These differential levels of thermal resistance correlate exactly with the ecology of these populations.