Biological Phosphorus Cycling in Dryland Regions
Contribution to a Book
Phosphorus in Action
Springer Berlin Heidelberg
The relatively few studies done on phosphorus (P) cycling in arid and semiarid lands (drylands) show many factors that distinguish P cycling in drylands from that in more mesic regions. In drylands, most biologically relevant P inputs and losses are from the deposition and loss of dust. Horizontal and vertical redistribution of P is an important process. P is concentrated at the soil surface and thus vulnerable to loss via erosion. High pH and CaCO3 limit P bioavailability, and low rainfall limits microbe and plant ability to free abiotically bound P via exudates, thus making it available for uptake. Many invasive plants are able to access recalcitrant P more effectively than are native plants. As P availability depends on soil moisture and temperature, climate change is expected to have large impacts on P cycling.
Belnap, J., 2011, Biological Phosphorus Cycling in Dryland Regions, in Bünemann, E. K. e. a., ed., Phosphorus in Action: Biological Processes in Soil Phosphorus Cycling, Volume 26: Berlin, Springer-Verlag Berlin Heidelberg, p. 371-406.