Forman R.T.T. & Dowden D.L.
(1977):
Nitrogen fixating lichen roles from desert to alpine in Sangre de Cristo Mountains, New Mexico,
Bryologist,
80(4): 561-570
Lichens containing blue-green algae were measured by transects and reconnaissance in six major temperate vegetation types to estimate possible significance in annual nitrogen budgets and patch dynamics within ecosystems, and to estimate how a functional ecosystem attribute, i.e. nitrogen fixation, correlates with vegetation structure. Lichen cover was negligible in sagebrush desert, pinyon-juniper woodland, ponderosa pine forest and alpine tundra, but averaged 72 m2ha-1 in Douglas fir forest and …
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