Semi-arid Regions and Deserts
نویسندگان
چکیده
12.2 Biological Crusts of Arid Regions ............................. 346 12.2.1 Characteristic Species ................................................... 346 12.2.2 Taxonomic Problems in Describing Crust Cyanobacteria ...................................................... 347 12.2.3 Environmental Factors .................................................. 348 12.2.3.1 Light .............................................................................. 348 12.2.3.2 Water ............................................................................. 348 12.2.3.3 Temperature .................................................................. 350 12.2.3.4 Salinity .......................................................................... 350 12.2.3.5 Carbon Dioxide ............................................................. 351 12.2.3.6 Nutrients ........................................................................ 351 12.2.3.7 Wind and Burial by Sand .............................................. 351
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