Abstract:
:Previous publications have reported on investigations of CO2 exchange in the desert lichenRamalina maciformis both in its natural habitat in the Negev and in the laboratory. Utilizing laboratory data, net photosynthesis and dark respiration were expressed as mathematical functions of the most important environmental factors. Based on these relationships, a model is developed that allows one to predict CO2 exchange of the plant. Input data are light intensity, temperature, and water content of the thallus, together with a measure of the rate of the seasonal change of photosynthetic and respiratory activity. The validity of the model is tested by comparing simulated daily courses of CO2 uptake and release of the lichen with independent results of CO2 exchange measurements conducted in the field during and after the condensation of dew. The sensitivity of the model is shown by simulating changes in the input data of temperature and water content of the lichen.
journal_name
Oecologiajournal_title
Oecologiaauthors
Lange OL,Geiger IL,Schulze E-doi
10.1007/BF00751603subject
Has Abstractpub_date
1977-09-01 00:00:00pages
247-259issue
3eissn
0029-8549issn
1432-1939pii
10.1007/BF00751603journal_volume
28pub_type
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